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    25 December 2016, Volume 36 Issue 6 Previous Issue    Next Issue
    Separation and Identification of Phenolic Compounds of Ethanol Extract from Lacquertree Woods
    CHEN Hong-xia, WANG Cheng-zhang, ZHOU Hao, TAO Ran, YE Jian-zhong, LI Wen-jun
    2016, 36 (6):  1-8.  doi: 10.3969/j.issn.0253-2417.2016.06.001
    Abstract ( 614 )   PDF (1123KB) ( 312 )   Save
    The aim of this study was to separate antityrosinase compounds of the ethyl acetate fraction of ethanol extract from Toxicodendron vernicifluum (Stokes) F. A. Barkley(lacquertree) wood power using silica-gel column chromatography, medium pressure liquid chromatography and preparative high performance liquid chromatography through bioactivity-guided isolation. Seven phenolic compounds were obtained and identified from the ethyl acetate fraction from lacquertree by IR, MS and NMR chromatographies. The separated compounds were gallic acid(1), fustin(2), fisetin(3), sulfuretin(4), 3,4',7-trihydroxy-flavanonol(5), quercetin(6) and butin(7). The antityrosinase activities(IC50) from strong to weak were sulfuretin(3.74 mg/L), butin(4.32 mg/L), quercetin(18.73 mg/L), fisetin(69.4 mg/L), gallic acid(89.5 mg/L), fustin(100 mg/L) and 3,4',7-trihydroxy-flavanonol(164.07 mg/L).
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    Upgrading of Rape Straw Pyrolytic Bio-oil Using Non-thermal Plasma Assisted by HZSM-5 Catalytic Cracking
    ZHAO Wei-dong, LAI Zhi-hao, CAI Yi-xi, HUANG Jian-quan, FAN Yong-sheng
    2016, 36 (6):  9-15.  doi: 10.3969/j.issn.0253-2417.2016.06.002
    Abstract ( 735 )   PDF (1054KB) ( 510 )   Save
    Catalytic cracking is an efficient method for bio-oil upgrading. However, the catalyst was prone to coking and deactivating in upgrading process. This leads to the decrease of quality of upgrading bio-oil. Therefore, the non-thermal plasma(NTP) assisted catalytic cracking reactor with zeolite catalyst was designed. The effects of the operating parameters on yield and physicochemical properties of upgraded bio-oil were studied. Under the optimum operating parameters, i.e., the catalyst temperature of 400℃, catalyst bed height of 35 mm and reactor discharge power of 25 W, the yield of upgraded bio-oil, oxygen content, higher heating value(QHHV), pH value and heavy component were obtained as 9.13%, 15.78%, 34.86 MJ/kg, 5.41, 3.15%, respectively. In terms of thermal gravimetric analysis, the total coke amount on the surface of the catalyst decreased from 5.88% to 2.14% through the methodology of NTP assisted HZSM-5.
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    Preparation and Performance of Calcium-rich Activated Carbon Monolith Cemented by Sticky Rice-lime Mortar
    HUANG Ming-jie, HUANG Bi-zhu, LIN Shan, HUANG Biao, CHEN Yan-dan
    2016, 36 (6):  16-22.  doi: 10.3969/j.issn.0253-2417.2016.06.003
    Abstract ( 652 )   PDF (1670KB) ( 276 )   Save
    Chinese fir sawdust was physically activated by papermaking white mud to prepare calcium-rich powdery activated carbons. The effects of preparation conditions on the yield and adsorption capacity of activated carbons were investigated. Compression molding of a mixture of calcium-rich activated carbons blended with cooked sticky rice soup was performed to fabricate sticky rice-lime mortar cemented column-shaped activated carbon monolith. Under the optimized conditions, the specific surface area of the prepared activated carbon was 975 m2/g and the yield was about 24%. After heat treatment at 300℃ for 1 h, the iodine adsorption value of the prepared activated carbon monolith was 410 mg/g, the compressive strength was 18 MPa, and its resistance to water immersion was excellent. SEM and XRD analysis results indicated that the components of the sticky rice-lime mortar bonding activated carbon monolith were cemented closely, and the carbonation crystallization process of the lime component which was integrated in activated carbon monolith could be regulated by the glutinous rice paste to form a compact microstructure.
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    Biomimetic Catalytic Oxidation of α-Pinene by Molecular Oxygen with Ferric Deuteroporphyrin Dimethyl Ester as Catalyst
    XU Shi-chao, ZHAO Zhen-dong, BI Liang-wu, CHEN Yu-xiang, ZHU Shou-ji, LU Yan-ju, WANG Jing, GU Yan
    2016, 36 (6):  23-28.  doi: 10.3969/j.issn.0253-2417.2016.06.004
    Abstract ( 491 )   PDF (973KB) ( 278 )   Save
    Ferric deuteroporphyrin dimethyl ester (FeClDPDME) was employed as the model catalyst to investigate the catalytic oxidation of α-pinene by molecular oxygen without any solvent and additive. The influences of temperature, time, catalyst mass ratio and molecular oxygen flow rate on this reaction were investigated. The results showed that the oxidation occurred mainly on C=C bond and allylic C-H bonds of α-pinene. The optimal conditions of this reaction were reaction temperature 80℃, reaction time 6 h, catalyst mass ratio 50 mg/kg and molecular oxygen flow rate 60 mL/min, respectively. Under these conditions the conversion rate of α-pinene and the total selectivity of C=C bond and allylic C-H bonds oxidation products reached 17.9% and 86.7%, respectively.
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    Synthesis and Antibacterial Activity of Nitrogenated and Haloid Derivatives of Ginkgo Biloba Leaves Polyprenol
    TAO Ran, WANG Cheng-zhang, YE Jian-zhong, ZHOU Hao, CHEN Hong-xia
    2016, 36 (6):  29-34.  doi: 10.3969/j.issn.0253-2417.2016.06.005
    Abstract ( 666 )   PDF (800KB) ( 328 )   Save
    Chemical structure modification of -OH in α-terminal unit of Ginkgo biloba leaves polyprenol (GBP) was conducted to prepare five nitrogenated and haloid derivatives of GBP,i.e., polyprenyl phthalimides (GPH), polyprenyl amines (GAM), polyprenyl quaternary ammonium salt (GAS), polyprenyl trifluoroacetate (GTF) and polyprenyl chloroacetate (GCH). All derivatives were identified by 1H NMR. In the study of antibacterial activity, GAS had the highest antibacterial activity against strains Escherichia coli and Staphylococcus aureus with inhibition halos of 19.1-19.8 mm and the minimal inhibitory concentration(MIC) of 31.3 mg/L. At the same time, the time-killing curves of GAS against E.coli and S.aureus under sub-MIC of 15.6 mg/L were drawn and studied. And the results showed that GAS possessed antibacterial activity against E.coli and S.aureus in 48 h and the bacterial number was in a rapid decline within 8 h of exposure in the time-kill studies.
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    Production of Bio-aviation Fuel Intermediates by Aldol Condensation of Furfural and Methyl Isobutyl Ketone over K+/CaO
    QI Xue-zhen, XIE Min-hui, LIN Shao-jie, ZHANG Hai-yan, LIU Xue-jun, LU Mei-zhen, JI Jian-bing
    2016, 36 (6):  35-40.  doi: 10.3969/j.issn.0253-2417.2016.06.006
    Abstract ( 722 )   PDF (953KB) ( 308 )   Save
    The supported solid base catalyst K+/CaO was synthesized by isometric impregnation-calcination method. The structure of catalysts were characterized by XRD and CO2-TPD. Preparation of the bio-aviation fuel intermediate of furfural-methyl isobutyl ketone (F-MIBK) catalyzed by K+/CaO through condensation of furfural and methyl isobutyl ketone under solvent-free conditions was studied. The effects of different types of catalyst, different loading of alkali metal ion,reaction temperature, reaction time and the molar ratio of material on the reaction were investigated. The results indicated that the condensation reaction of furfural and methyl isobutyl ketone was carried on the strong basic sites of the catalyst, and the addition of K+ significantly improved the alkaline of CaO. K+/CaO gave the optimum catalytic performance with 1% loading of K2CO3. When the molar ratio of furfural and methyl isobutyl ketone was 1:2 and the amount of catalyst was 10% of the mass of the material at 140℃ for 3h, furfural conversion rate reached 99.1%. The selectivity and yield of F-MIBK reached 98.2% and 97.1%,respectively.
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    Synthesis of Isolongifolanyl Thiazole Compounds and Their Antibacterial and Antitumor Activities
    RUI Jian, YANG Jin-lai, CAI Tao, XU Xu, WANG Shi-fa
    2016, 36 (6):  41-48.  doi: 10.3969/j.issn.0253-2417.2016.06.007
    Abstract ( 622 )   PDF (750KB) ( 353 )   Save
    Eleven new kinds of isolongifolanyl thiazole compounds were synthesized by condensation, nucleophilic substitution and cyclization from isolongifolenone. The structures of the target compounds were characterized by 1H NMR, 13C NMR, LC-MS and FT-IR, respectively. Antibacterial evaluation of the compounds was carried out by minimum inhibitory concentrations assay (MIC). The results showed that the antibacterial activities of (E)-4-(4-methoxyphenyl)-2-(2-(1,1,5,5-tetramethyl-3,4,5,6-tetrahydro-1H-2,4a-methanonaphthalen-7(2H)-ylidene)hydrazinyl)thiazole(2e) and (E)-2-(2-(1,1,5,5-tetramethyl-3,4,5,6-tetrahydro-1H-2,4a-methanonaphthalen-7(2H)-ylidene)hydrazinyl)-4-(p-tolyl) thiazole (2g) were better than those of others against Escherichia coli and Staphylococcus aureus. Their MIC were 7.8 mg/L. The antibacterial activity of (E)-4-(4-chlorophenyl)-2-(2-(1,1,5,5-tetramethyl-3,4,5,6-tetrahydro-1H-2,4a-methanonaphthalen-7(2H)-ylidene)hydrazinyl)thiazole (2b) was better than those of others against fungus. Its MIC value aganist Candida albicans and Candida tropicalis was 15.6 mg/L. Their antitumor activities against HepG2 were evaluated by thiazole blue test(MTT). Compound 2g (IC50=43.9±0.9 mg/L) was found to be the most potent derivative overall the tested compounds against HepG2.
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    Synthesis and Antioxidant Acticity of Stearoyl Tannic Acid Ester Based on Hydroxyl Protection
    LI Yan, AN Li-ping, GUO Yu-chen, JIN Li-e
    2016, 36 (6):  49-55.  doi: 10.3969/j.issn.0253-2417.2016.06.008
    Abstract ( 612 )   PDF (1118KB) ( 316 )   Save
    In order to solve the high water-solubility and low oil-solubility of tannic acid(TA), stearoyl tannic acid ester (C18-TA) as a kind of natural antioxidant was synthesized from tannic acid and stearic anhydride through three steps in the present study. At first, the phenolic hydroxyl of tannic acid was partially protected by benzyl bromide, then the long chain fatty hydrocarbyl was introduced with stearic anhydride as acetylating reagent, pyridine as catalyst and N2 as shielding gas. At last, benzyl group was removed in weak acid and C18-TA was obtained. The synthetic conditions were optimized through uniform design. The chemical structure of C18-TA was characterized by FT-IR, UV and 1H NMR. The antioxidant activity was assayed by·DPPH scavenging and peroxide value (POV) of linseed oil. The results showed that the optimized conditions were the dosage of tannin 1 g, stearic acid 0.6 g, pyridine 1.5 mL, reaction temperature 80℃, and refluent time 265 min. Under the optimized conditions, the yield of C18-TA reached 87.98%. The C18-TA synthesized by hydroxyl protection owned much hydroxyl and excellent surfactivity. The antioxidant activity of C18-TA was higher than tannic acid and butylated hydroxyanisole (BHA). The·DPPH scavenging rate of C18-TA reached 91.96%-97.39% at the mass concentration of 0.05-0.25 g/L. The POVs of linseed oil increased slowly and were 3.82-17.72 mmol/kg in 0-30 d.
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    Preparation and Catalytic Activity of[Rh(COD)Cl]2 Catalyst for Turpentine Hydrogenation
    WANG Hong-qin, WANG Ya-ming, JIANG Li-hong, JIN Yan-qiong
    2016, 36 (6):  56-62.  doi: 10.3969/j.issn.0253-2417.2016.06.009
    Abstract ( 715 )   PDF (782KB) ( 392 )   Save
    Precious metal catalyst[Rh(COD)Cl]2 was prepared by stirring and reflux at a constant temperature. The preparing conditions were optimized by orthogonal experiments. The suitable conditions were obtained as molar ratio of COD and RhCl3·3H2O 3.5:1, reflux temperature 80℃ and reflux time 3 h. Catalyst[Rh(COD)Cl]2 was used in the hydrogenation of turpentine, and the reaction conditions such as pressure, temperature, quantity of catalyst, reaction time were investigated to get the optimum reaction parameters. The suitable conditions of hydrogenation reaction were reaction pressure 2.5 MPa, reaction temperature 45℃, reaction time 4 h and catalyst dosage 2.5% (based on the mass of turpentine). Under the optimized reaction conditions, the conversion rate of α-pinene was 98.21%, the selectivity of cis-pinane was 97.46% and the yield of cis-pinane was over 95.72%.
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    Four Kinds of Algorithms Used for the Determination of Pulpwood Properties by Near Infrared Spectroscopy
    WU Ting, FANG Gui-gan, LIANG Long, LIN Yan, XIONG Zhi-xin
    2016, 36 (6):  63-70.  doi: 10.3969/j.issn.0253-2417.2016.06.010
    Abstract ( 629 )   PDF (1324KB) ( 361 )   Save
    Near infrared(NIR) spectra of pulpwood species were collected. The basic density, holocellulose, lignin and benzene-alcohol extractive content of samples were analyzed by traditional methods. The moisture content under manual control was analyzed,too. After the pretreatment of the original spectra, partial least squares(PLS) algorithm, LASSO algorithm, support vector regression(SVR) algorithm and back propagation artificial neural network(BP-ANN) algorithm were used to build the prediction models for basic density, moisture content, holocellulose, lignin and benzene-alcohol extractive content. The independent verification of the prediction models showed that the optimal model for basic density was built by LASSO algorithm with the root mean square error(RMSEP) of 0.006 3 g/cm3 and the absolute deviation(AD) of -0.008 8-0.009 6 g/cm3. The optimal model for moisture content was built by PLS algorithm with the RMSEP of 1.21% and the AD of -1.99%-2.03%. The optimal model for holocellulose content was built by LASSO algorithm with the RMSEP of 0.49% and the AD of -0.85%-0.87%. The optimal model for lignin content was built by SVR algorithm with the RMSEP of 0.43% and the AD of -0.76%-0.74%. The optimal model for the benzene-alcohol extractive content was built by PLS algorithm with the RMSEP of 0.24% and the AD of -0.35%-0.38%. The prediction performance of the models could meet the needs of pulping and papermaking industry. The detemination accuracy of pulpwood properties were promoted by algorithm selection.
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    Epoxidation of Wilson dogwood Oil Catalyzed by Peroxy Quaternary Ammonium Borotungstate Catalyst
    WANG Hao-rong, JIANG Jian-chun, XU Jun-ming, LI Jing, LIU Peng
    2016, 36 (6):  71-75.  doi: 10.3969/j.issn.0253-2417.2016.06.011
    Abstract ( 607 )   PDF (816KB) ( 338 )   Save
    Peroxy quaternary ammonium borotungstate catalyst was prepared in this study. The synthesized catalyst was used in the epoxidation of Cornus wilsoniana Wangerin (wilson dogwood) oil using H2O2 as oxidant and ethyl acetate as solvent in the absence of carboxylic acid. The effects of reaction conditions on the epoxidation were studied. Under the optimum conditions of oil 10 g(double bond 49 mmol), reaction temperature 60℃, reaction time 4 h, H2O2 to double bond molar ratio 1.2:1.0 and catalyst 0.1 g, the product epoxy value was up to 4.52%. Conversion and selectivity of double bond were 77.4% and 74.4%, respectively.
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    Effect of Steam Explosion and Ethanol Pulping Pretreatment on Structure of Wheat Straw
    PAN Cheng, LIU Zhong, HUI Lan-feng
    2016, 36 (6):  76-80.  doi: 10.3969/j.issn.0253-2417.2016.06.012
    Abstract ( 708 )   PDF (9104KB) ( 171 )   Save
    The wheat straw was pretreated by steam explosion and ethanol cooking to investigate the changes of chemical composition and morphology structure. The wheat straw were firstly steam explored under 1.75 MPa pressure for 3.5 min, then treated by 55% ethanol at 170℃ for 30 min with a 1:5 solid to liquid ratio (g:mL). The hemicellulose content of the treated product was 89%, and the lignin content was decreased to 42.16%. The morphology structures of the treated wheat straw were analyzed by FT-IR, Fiber Fester and SEM. The results showed that the hemicelluloses were degraded significantly and the ester linkages were also destroyed after steam explosion, but only tiny degradation of cellulose was observed. For the fiber morphology, the average length of steam explored pulp was significantly decreased. However, the average width of the steam explored pulp were increased. After the ethanol pretreatment, there is no negative impact on the average fiber length, but a lower average width was observed. After this two-step pretreatment, a fluffier wheat straw was obtained and very few fragments were attached to the fiber surface.
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    Preparation of Ruthenium Nanoparticles Catalyst in [BMIM]BF4 and Catalytic Hydrogenation of α-Pinene
    WANG Xiao-yan, YU Shi-tao, HOU Sheng-li, CHEN Xiang-yun, XIE Cong-xia
    2016, 36 (6):  81-86.  doi: 10.3969/j.issn.0253-2417.2016.06.013
    Abstract ( 658 )   PDF (1032KB) ( 288 )   Save
    The mixture of RuCl3·3H2O and 1-butyl-3-methyl limidizaolium tetrafluoro-borate[BMIM] BF4 with the molar ratio of 100:1 was stirred for 2 h at 60℃ and then the reactor was pressurized by 4.0 MPa H2 and placed in a 40℃ water bath with stirring for 3 h. Then, the ruthenium nanoparticles catalysts stabilized by[BMIM] BF4 were obtained. The catalysts were characterized by X-ray diffraction(XRD) and transmission electron microscopy(TEM). The results indicated that the crystal structure of Ru nanoparticles prepared in[BMIM] BF4 was face-centered cubic stacking structure and the nanoparticles were uniformly distributed with the average diameter of (2.5±0.6) nm. The catalysts were applied in the hydrogenation of α-pinene with H2O as reaction medium. Under the suitable conditions of α-pinene/Ru molar ratio 400:1, 4 mL H2O, 90℃, 3.0 MPa and 1.5 h, the conversion rate of α-pinene reached 99%, and the selectivity of cis-pinane was 98.9%.
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    Thermal Stability and Decomposition Kinetics of Hydroxytyrosol
    YUAN Jiao-jiao, YE Jian-zhong, WANG Cheng-zhang, LIU Yu-hong
    2016, 36 (6):  87-92.  doi: 10.3969/j.issn.0253-2417.2016.06.014
    Abstract ( 751 )   PDF (682KB) ( 336 )   Save
    The thermal stability decomposition kinetics and shelflife of hydroxytyrosol were studied at different heating rates (β=5, 10, 20, 40 K/min). Thermal decomposing curves were obtained in the nitrogen atmosphere by TG analysis. Five thermal analysis kinetic methods of multi-heating rate methods(Kissinger, Friedman, Flynn-Wall-Ozawa) and single heating rate methods (Coats-Redfern and Achar) were used to speculate the probable mechanism of thermal decomposing reaction and the kinetic parameters including activation energy Ea and pre-exponential factor A. The shelflife of hydroxytyrosol at room temperature (25℃) was calculated by the kinetic parameters. The TG curve showed the decomposition of hydroxytyrosol was finished by one step, and the temperature of 260-409℃ was the main thermal decomposition stage at the heating rate of 10 K/min. With the increase of temperature, the steep and obvious weight loss occurred rapidly in the TG analysis. The DTG curve presented as negative value and decreased rapidly with the maximum loss ratio of -12.91%/min at 305.2℃. With the increase of the heating rate, thermal decomposing temperature of hydroxytyrosol rose, the thermal decomposing curves moved toward high temperature slightly and the decomposition showed hysteresis phenomenon. The probable kinetic mechanisms of thermal decomposition were one-dimensional diffusion. The average apparent activation energy (Ea) was 122.40 kJ/mol and pre-exponential factor (A) was 3.37×1010 min-1. The theoretical shelflife of hydroxytyrosol at room temperature was about 4-5 years in the nitrogen atmosphere.
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    Effects of Particle Size and Water Content of Raw Materials on Properties of Activated Carbon Prepared by H3PO4 Activation
    TIAN Xiao-yun, DONG Yin-sheng, YANG Jia-nan, ZHANG Cheng-ming
    2016, 36 (6):  93-99.  doi: 10.3969/j.issn.0253-2417.2016.06.015
    Abstract ( 614 )   PDF (1489KB) ( 272 )   Save
    Activated carbons were prepared from walnut shell and apricot shell by H3PO4 activation. Effects of different raw material particle sizes and water contents on the methylene blue value, iodine value and yield of activated carbons were investigated. The results showed that the particle size and water content of raw materials had significant influence on activated carbons' absorption capability. Reducing the particle size within a certain range has positive effect to increase the absorption capability. However, the influences of water content were different between walnut shell and apricot shell. Increasing the water content had negative effect to the properties of activated carbon prepared from apricot shell with small size, but it was beneficial to the properties of activated carbon prepared from walnut shell. When walnut shell had the particle size of 0.5-0.7 mm and water content of 11%, the activated carbon by H3PO4 activation gave the yield of 41%, methylene blue value of 230 mg/g and iodine value of 874 mg/g. When apricot shell had the particle size of 0.7-1.2 mm and water content of 0%, the activated carbon had the yield of 42%, methylene blue value of 87 mg/g and iodine value of 734 mg/g.
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    Enzyme-assisted Extraction and Macroporous Resin Purification of Fustin from Rhus punjabensis var. Sinica Rehd. Fruit
    DONG Ai-wen, YAO Shu-feng, ZHAO Hong-qiao, CHENG Jiang, WU Ling
    2016, 36 (6):  100-106.  doi: 10.3969/j.issn.0253-2417.2016.06.016
    Abstract ( 545 )   PDF (1118KB) ( 280 )   Save
    After the Rhus punjabensis var.sinica fruits were disposed by cellulase, the volume fraction of 70% ethanol-macroporous resin combined technique was used to extract and purify fustin. With the fustin yield as study index, the orthogonal experiment was employed to optimize the extraction process. The best resin for fustin separation and purification was screened from eight kinds of macroporous resin to study the effect on the static and dynamic adsorption and desorption of fustin. The results showed that the optimum conditions for the enzyme treatment were enzyme dosage 120 U/mL, enzymolysis temperature 55℃, enzymolysis time 60 min and enzymolysis pH value 4.5, and the fustin yield was up to 1.35% with the purity of 14.59%. Through Static adsorption test, the most effective XDA-8 resin was selected. The dynamic adsorption test showed that the best conditions for XDA-8 separation and purification were sample mass concentration of 14.4 g/L, flow rate of 80.384 mL/h, ethanol volume fraction of 60% and eluent flow rate of 80.384 mL/h. Under these conditions, the desorption rate was 91.86% and after purification the fustin purity could reach 68.15%.
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    Recent Progress in Hydrodeoxygenation of Biomass-based Oxygenates
    ZHANG Ying, HAN Zheng, XU Lu-jiang, FU Yao
    2016, 36 (6):  107-118.  doi: 10.3969/j.issn.0253-2417.2016.06.017
    Abstract ( 778 )   PDF (1471KB) ( 458 )   Save
    In the preparation of the biofuel or biochemical process, reducing the oxygen content of the feedstock and improving hydrogen carbon ratio are very important. The hydrodeoxygenation is the key to this process. With the expect to provide a reference for finding a highly efficient, green, economic and sustainable catalytic system that can convert biomass into biofuel, this paper focused on the elementary reactions of hydrodeoxygenation and reviewed the development of hydrodeoxygenation reaction according to the differences of oxygen-contained compounds' structure and catalytic systems.
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    Research Progress in Superhydrophobic Cellulose-based Materials
    WU Long-hui, LU Sheng-chang, LIN Xin-xing, XIAO He, WU Hui, HUANG Liu-lian, CHEN Li-hui
    2016, 36 (6):  119-126.  doi: 10.3969/j.issn.0253-2417.2016.06.018
    Abstract ( 681 )   PDF (1240KB) ( 482 )   Save
    The superhydrophobicity of material surface is depended on the combination of low surface-energy substances and micro/nano rough surface structure. This plays an important role in adsorption, self-cleaning materials, corrosion resistance, and low dragging coatings fields. Cellulose is a renewable biomaterial with good mechanical property, flexibility and permeability. The physical and chemical modification on cellulose can change the surface property to achieve desired superhydrophobicity, which significantly extends the application of cellulose. In this review, the research developments of constructing superhydrophobic cellulose-based materials were summarized. The dipping, spraying, grafting, vapor deposition and hydrothermal method for the modification of cotton, filter paper and microspheres were described in detail.
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