摘要
多孔球形再生纤维素因具有稳定的三维结构和多孔结构而容易与其他功能材料复合,应用潜力较大。将纤维素溶解在低温的氢氧化钠/尿素/水体系中得到清澈透明的纤维素溶液,通过溶胶—凝胶转相法得到再生纤维素微球。研究了纤维素聚合度、乳化时间、乳化温度、纤维素溶液浓度等因素对制备再生纤维素微球的影响。结果表明,低聚合度的纤维素原料更易溶解于氢氧化钠/尿素/水体系;确定了制备再生纤维素微球的最佳工艺条件为乳化时间30 min,乳化温度45℃,纤维素溶液浓度0.61μmol/L,再生纤维素微球表面呈多孔结构。
Porous spherical regenerated cellulose was easy to be compounded with other functional materials because of its stable three-dimensional structure and porous structure and had great application potential.Cellulose was dissolved in a low-temperature sodium hydroxide/urea/water system to obtain a clear and transparent cellulose solution,and regenerated cellulose microspheres were obtained by sol-gel phase.The effects of cellulose polymerization degree,emulsification time,emulsification temperature and concentration of cellulose solution on the preparation of regenerated cellulose microspheres were studied.The results showed that cellulose raw materials with low polymerization degree were more easily dissolved in sodium hydroxide/urea/water system.The optimum conditions for preparation of regenerated cellulose microspheres were determined as emulsifying time of 30 min,emulsifying temperature of 45℃,cellulose solution concentration of 0.61μmol/L,and the surface of regenerated cellulose microspheres had a porous structure.
作者
孟庆方
谢瑞
刘安琪
许成成
许抒悦
徐国想
朱婧
MENG Qingfang;XIE Rui;LIU Anqi;XU Chengcheng;XU Shuyue;XU Guoxiang;ZHU Jing(School of Environment and Chemical Engineering,Jiangsu Ocean University,Lianyungang 222005,China)
出处
《江苏海洋大学学报（自然科学版）》
CAS
2021年第1期77-82,共6页
Journal of Jiangsu Ocean University:Natural Science Edition
基金
江苏省高等学校自然科学研究面上项目(18KJB530005)
江苏海洋大学自然科学基金资助项目(Z2017010)
江苏省先进材料功能调控技术重点实验室开放课题(jsklfctam201810)
江苏省研究生科研与实践创新计划项目(KYCX20_2945)。
关键词
纤维素溶解
再生纤维素微球
工艺优化
结构表征
cellulose dissolution
regenerated cellulose microspheres
process optimization
structural characterization
