基于溶剂置换的微纳米天丝原纤化纤维干燥与性能表征  

Drying of Micro-nano Tencel Fibril via Solvent Replacement and Performance Characterization

作　　者：贺涛 曾靖山[1] 钟艾辛 李尧 龙金[1] 王宜[1] HE Tao;ZENG Jingshan;ZHONG Aixin;LI Yao;LONG Jin;WANG Yi(State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《造纸科学与技术》2021年第3期30-34,共5页Paper Science & Technology

摘　　要：对微纳米天丝原纤化纤维的溶剂置换干燥过程进行研究,从溶剂的表面张力、溶剂与纤维的接触角、不同溶剂的配比及置换阶数等方面进行溶剂置换工艺的优化;采用溶剂置换干燥后纤维的微观结构、比表面积等测试结果来考察溶剂置换干燥的效果,并与未溶剂置换处理的干燥效果进行对比。实验结果表明,在使用叔丁醇溶剂时,微纳米天丝原纤化纤维的溶剂置换及干燥效果更好;对比分析不同干燥方式、不同脱气温度下比表面积测试结果,发现当使用叔丁醇溶剂置换冷冻干燥方式且脱气温度为105℃时,微纳米天丝原纤化纤维的B. E. T比表面积测试值结果最高,为29.9 m^(2)/g,而在同样实验条件下,直接冷冻干燥后微纳米天丝原纤化纤维的B. E. T比表面积测试值仅为15.6 m^(2)/g。The solvent replacement drying process of micro-nano tencel fibril was studied though the surface tension of the solvent, the contact angle between the solvent, the ratio of different solvents and so on, compared with the effect of non-solvent replacement. It’s found that the solvent replacement and drying effect of micro-nano tencel fibril is better when using tert-butyl alcohol solvent. Comparing the specific surface area under different drying methods and different degassing temperatures, it shown that the B.E.T specific surface area test value of micro-nano tencel fibril was the highest, which was 29.9 m^(2)/g, when reach to the tert-butyl alcohol solvent replacement freeze-drying method and the degassing temperature was 105 ℃.The B.E.T specific surface area test value of micro-nano tencel fibril after direct freeze-drying was only 15.6 m^(2)/g, under the same experimental conditions.

关 键 词：微纳米天丝原纤化纤维 溶剂置换 干燥 

分 类 号：O636.11[理学—高分子化学]