文献类型：期刊文献

中文题名：纤维素多孔吸附材料的制备

英文题名：Preparation of Porous Cellulosic Absorbing Materials

作者：王爱婷[1] 刘鹤[2] 刘仕伟[1] 商士斌[2] 于世涛[1]

第一作者：王爱婷

通信作者：Liu, He

机构：[1]青岛科技大学化工学院;[2]中国林业科学研究院林产化学工业研究所

年份：2015

卷号：35

期号：6

起止页码：1-7

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;EI(收录号：20161202132610);Scopus(收录号：2-s2.0-84960952713);北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金青年基金项目(31200446)

语种：中文

中文关键词：氢氧化钠/尿素/水;新戊二醇二缩水甘油醚;纤维素多孔材料

外文关键词：NaOH/urea/H20; neopentyl glycol diglycidyl ether; porous cellulosic absorbing materials

分类号：TQ35;TQ645

摘要：将纤维素溶解在氢氧化钠/尿素/水溶液中,与新戊二醇二缩水甘油醚(NGDE)发生交联反应,经过离心水洗纯化后冷冻干燥,制备了纤维素多孔材料。采用傅里叶变换红外光谱(FT-IR)、X射线衍射(XRD)、热重分析(TGA)和扫描电镜(SEM),对制备的纤维素多孔吸附材料的化学结构、晶型结构、热稳定性及微观形貌进行表征。研究了NGDE的用量和水凝胶质量分数对纤维素多孔材料的密度及吸水性能的影响。结果表明,4 g纤维素溶于100 g NaOH/尿素/水(质量比为7∶12∶81)溶液中制得纤维素溶液,在NGDE的用量18 m L,水凝胶质量分数为1.5%时,制备的纤维素多孔材料的密度为15.7 mg/cm3,吸水倍数达37倍,对此条件下制备的纤维素多孔材料进行结构分析,表明纤维素多孔材料具有连续的网状孔结构,纤维素的晶型由纤维素Ⅰ型转变为非晶态结构,初始热分解温度在250℃以上,热稳定性好。
Cellulose was dissolved in NaOH/urea/H20 solution system and crosslinked with neopentyl glycol diglycidyl ether （NGDE）. Then, the crosslinked products were purified by deionized water and freeze-drying to prepare porous cellulosic absorbing materials. The chemical composition, crystal structure, thermostability and morphological feature of the materials were analyzed by using Fourier transform infrared spectroscopy （ FT-IR ） , X-ray diffraction （ XRD ） , thermogravimetric analysis （ TGA ） and scanning electron microscopy （SEM） , respectively. The effects including the amount of NGDE and the mass fraction of hydrogel on the density and the water absorption ability of porous cellulosic materials were investigated. The results showed that 4 g cellulose was dissolved in 100g NaOH/urea/H20 solution and the amount of NGDE was 18 mL and the mass fraction of the hydrogel was 1.5% ,the density of the prepared materials reached 15.7 mg/em3 and water absorption ration was 37 times. The structure of materials prepared in this condition was characterized. The results showed that the cellulosic absorbing materials exhibited continuous network pore structure and the crystal structure was transformed from the cellulose I crystalline structure to amorphous structure. The porous cellulosic absorbing materials started to degrade above 250℃. This showed high thermal stability.