疏水性纤维素气凝胶球的制备及其吸附性能研究

doi:10.3969/j.issn.0253-2417.2018.01.002

林产化学与工业 ›› 2018, Vol. 38 ›› Issue (1): 9-17.doi: 10.3969/j.issn.0253-2417.2018.01.002

疏水性纤维素气凝胶球的制备及其吸附性能研究

刘志明¹, 吴鹏^1,2

1. 东北林业大学材料科学与工程学院, 黑龙江哈尔滨 150040;
2. 汉中职业技术学院药学与医学技术系, 陕西汉中 723000

收稿日期:2017-04-05 出版日期:2018-02-25 发布日期:2018-02-28
作者简介:刘志明(1971-),男,黑龙江明水人,教授,博士,博士生导师,主要从事生物质材料化学、纤维素气凝胶和纳米纤维素、木质素及其复合功能材料研究;E-mail:zhimingliuwhy@126.com。
基金资助:
林业公益性行业科研专项资助（201504602-5）；黑龙江省自然科学基金项目资助（C2015055）；浙江省林业工程重中之重一级学科开放基金重点项目资助（2014lygcz002）

Preparation of Hydrophobic Cellulose Aerogel Beads and Its Adsorption Performance

LIU Zhiming¹, WU Peng^1,2

1. College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China;
2. Department of Pharmacy and Medical Technology, Hanzhong Vocational Technical College, Hanzhong 723000, China

Received:2017-04-05 Online:2018-02-25 Published:2018-02-28

摘要/Abstract

摘要： 以氢氧化钠/尿素/水作为纤维素溶剂，采用液滴悬浮凝胶法、冷冻干燥和表面硅烷基化改性得到疏水性纤维素气凝胶球（HCAB）。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、X射线光电子能谱（XPS）和比表面积及孔隙度测定（BET法）等检测手段对改性前后的纤维素气凝胶（UCAB）和HCAB的形貌、化学态、晶型结构和孔隙结构进行了分析。同时，通过接触角和吸附实验对样品的润湿性和吸附性能进行测定。研究表明：十八烷基三氯硅烷（OTS）的引入没有改变UCAB的形态特征与结晶结构，而使合成的HCAB具有很好的疏水亲油特性；HCAB表观密度为17.6 mg/cm³，总孔体积达56.11 cm³/g，对不同密度的有机液体都具有良好的吸附作用，吸附量在30~60 g/g范围，而且吸附后球形形态保持稳定；HCAB重复使用率高，对甲苯重复吸附-脱附5次后吸附量稳定在40 g/g以上，并且吸附剂回收率没有明显变化。

关键词: 纤维素, 气凝胶球, 表面疏水化, 吸附性能

Abstract: Take NaOH/urea aqueous system as solvent,hydrophobic cellulose aerogel beads (HCAB) were fabricated by the process of droplet suspension gelation,freeze-drying and surface silylanization.Morphology,chemical state,crystal form and pore structure of HCAB were characterized and analyzed by scanning electron microscopy (SEM),fourier transform infrared spectroscopy (FT-IR),X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS) and BET method.Meanwhile,wettability and adsorption performance of HCAB were measured by the contact angle and oil adsorption test.The results showed that the silation caused no change to microscopic feature and crystalline structure of original regenerated cellulose aerogel beads (UCAB),this reaction occurs only in the surface of hydrophilic hydroxyl groups of cellulose,hydrophilic cellulose aerogel beads with good hydrophobic properties.The performance density and total pore volume of HCAB was 17.6 mg/cm³and 56.11 cm³/g,respectively.At the same time HCAB possessed well adsorptive selectivity for non-polar solvent in the test of adsorption,the absorbing capacity to different density of non-polar solvent such as n-hexane,toluene,chloroform and so on was in the range of 30-60 g/g.Besides HCAB also possessed well reusability,the adsorbing capacity to methylbenzene was stable in 40 g/g in 5 times of adsorption-desorption,and maintained high structure stability.

Key words: cellulose, aerogel beads, surface hydrophobization, absorption performance

中图分类号:

TQ35

刘志明, 吴鹏. 疏水性纤维素气凝胶球的制备及其吸附性能研究[J]. 林产化学与工业, 2018, 38(1): 9-17.

LIU Zhiming, WU Peng. Preparation of Hydrophobic Cellulose Aerogel Beads and Its Adsorption Performance[J]. Chemistry and Industry of Forest Products, 2018, 38(1): 9-17.

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疏水性纤维素气凝胶球的制备及其吸附性能研究

Preparation of Hydrophobic Cellulose Aerogel Beads and Its Adsorption Performance

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