林产化学与工业2018，Vol.38Issue(1)：9-17,9.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
Preparation of Hydrophobic Cellulose Aerogel Beads and Its Adsorption Performance
摘要
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.关键词
纤维素/气凝胶球/表面疏水化/吸附性能Key words
cellulose/aerogel beads/surface hydrophobization/absorption performance分类
化学化工引用本文复制引用
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):9-17,9.基金项目
林业公益性行业科研专项资助(201504602-5) （201504602-5）
黑龙江省自然科学基金项目资助(C2015055) （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) （2014lygcz002）
