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

Abstract

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

CLC Number:

TQ35

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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Preparation of Hydrophobic Cellulose Aerogel Beads and Its Adsorption Performance

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