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林产化学与工业 ›› 2015, Vol. 35 ›› Issue (6): 1-7.doi: 10.3969/j.issn.0253-2417.2015.06.001

• 研究报告 •    下一篇

纤维素多孔吸附材料的制备

王爱婷1, 刘鹤2, 刘仕伟1, 商士斌2, 于世涛1   

  1. 1. 青岛科技大学 化工学院, 山东 青岛 266042;
    2. 中国林业科学研究院 林产化学工业研究所, 江苏 南京 210042
  • 收稿日期:2014-10-28 出版日期:2015-12-25 发布日期:2015-12-28
  • 通讯作者: 刘鹤(1981—),男,副研究员,研究领域为生物质资源的化学研究与利用;E-mail:liuheicifp@hotmail.com E-mail:liuheicifp@hotmail.com
  • 作者简介:王爱婷(1990—),女,山东菏泽人,硕士生,主要从事纤维素材料的研究
  • 基金资助:
    国家自然科学基金青年基金项目(31200446)

Preparation of Porous Cellulosic Absorbing Materials

WANG Ai-ting1, LIU He2, LIU Shi-wei1, SHANG Shi-bin2, YU Shi-tao1   

  1. 1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
    2. Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, China
  • Received:2014-10-28 Online:2015-12-25 Published:2015-12-28

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 mL,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。

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

Abstract: Cellulose was dissolved in NaOH/urea/H2O 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/H2O 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/cm3 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 celluloseⅠcrystalline structure to amorphous structure.The porous cellulosic absorbing materials started to degrade above 250℃.This showed high thermal stability.

Key words: NaOH/urea/H2O, neopentyl glycol diglycidyl ether, porous cellulosic absorbing materials

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