文章摘要
阳离子乳液对纤维素表面的疏水改性
Hydrophobic Modification of Cellulose Surface by Cationic Latex
  
DOI:10.16865/j.cnki.1000-7555.2018.05.012
中文关键词: 蔗渣纤维素  阳离子乳液  静电吸附  疏水改性
英文关键词: bagasse cellulose fibers  cationic latex  electrostatic adsorption  hydrophobic modification
基金项目:国家自然科学基金资助项目(21306027);广西自然科学基金资助项目(2014GXNSFAA118036);广西石化资源加工及过程强化技术重点实验室主任课题基金(2014Z003)
作者单位
王福涛, 蔡平雄, 石 翔, 潘远凤 广西大学化学化工学院 广西石化资源加工及过程强化技术重点实验室广西 南宁 530004 
摘要点击次数: 118
全文下载次数: 
中文摘要:
      为解决植物纤维素和疏水基材界面“不相容”问题,采用吸附阳离子核壳乳胶粒子对蔗渣纤维素进行疏水改性。透射电镜和动态光散射测试表明,乳液粒径分布较宽。研究pH和温度对纤维吸附性能的影响发现,吸附量随pH的增大而减小。吸附过程中由于粒径分布较宽,出现两段吸附,吸附过程主要受静电、氢键、π-π键和链缠结的影响。通过纤维素的扫描电镜(SEM)、红外(FT-IR)、比表面积测试等表明,乳胶粒子成功吸附到纤维素表面。改性纤维素表面接触角由0°提高到102°。改性后的纤维素可作为复合材料的增强介质。
英文摘要:
      The hydrophobic modification of bagasse cellulose fiber surface by the adsorption of cationic poly latex with core-shell structure prepared via two-step semi-batch emulsion polymerization was conducted in attempt to enhance the interfacial compatibility between hydrophilic fibers and the hydrophobic substrates for various applications. The results of TEM and dynamic light scattering (DLS) analysis indicate that the core-shell latex possesses a broad particles size distribution, which leads to adsorption of the latex onto fiber surface by two-stage equilibrium. The effects of pH and temperatures on the adsorption of latex for cellulose fibers were described, and the amount of adsorption decreases with increased in pH. The results of FT-IR and SEM for modified cellulose fibers prove the latex particles are adsorbed onto the surface of cellulose fibers successfully. In addition, the surface property of the modified cellulose fibers was also investigated via contact angle measurement. The contact angle of cellulose is changed from 0° to 102°, the results show that the cellulose fiber modified with the latex becomes hydrophobic, allowing the as-modified cellulose to be potential reinforcements for biocomposite. Finally, the adsorption mechanism was proposed according to the adsorption process mainly governed by electrostatic interactions, hydrogen bond, π-π stack and chain entanglement.
查看全文   查看/发表评论  下载PDF阅读器
关闭