摘要
采用球磨辅助固体酸水解法制备了纤维素纳米微晶,对球磨条件及酸水解条件进行了系统研究,同时对所得纤维素纳米微晶进行了性能表征。结果表明,采用机械力化学-球磨预处理可活化纤维素原料;采用草酸对球磨预活化后的纤维素原料水解提取纤维素纳米微晶,发现球磨处理2. 5 h后,采用70%的草酸在90℃下水解5 h,得到的纤维素纳米微晶尺寸在200～300 nm,产率在61%左右;此外,草酸可通过简单方法进行回收,回收的草酸可继续用于水解制备纤维素纳米微晶。
Cellulose nanocrystals （CNCs） were extracted by ball mill assisted solid acid hydrolysis method. The effect of ball milling and acid hydrolysis were comprehensively studied, the properties of the obtained CNCs were also characterized. The results showed that ball milling could benefit the later acid hydrolysis. It was also found that CNC with a length of about 200-300 nm could be obtained by hydrolysis at 90℃ for 5 hours using 70 % oxalic acid. In addition, the unreacted organic acid can be recovered by recrystallization at room temperature and further reused for hydrolysis to extract CNC, providing a potential way to replace the conventional sulfuric acid hydrolysis method.
作者
朱孔根
胡晓霞
钱迅南
余志成
宋凯利
ZHU Kong-gen;HU Xiao-xia;QIAN Xun-nan;YU Zhi-cheng;SONG Kai-li(Engineering Research Center for Eco-Dyeing ＆ Finishing of Textiles,Ministry of Education,Zhejiang Sci-Tech University,Hangzhou 310018,China;Key Laboratory of Advanced Textile Materials and Manufacturing Technology,Ministry of Education,Zhejiang Sci-Tech University,Hangzhou 310018,China;Shanghai Urban Constration Vocational College,Shanghai 201415,China)
出处
《造纸科学与技术》
2018年第5期30-35,59,共7页
Paper Science & Technology
基金
浙江理工大学化学工程与技术浙江省高校重中之重学科生态染整技术教育部工程研究中心优秀博士专项(CETT2017003)
国家留学基金(201400630056)
关键词
纤维素纳米微晶
清洁生产
草酸
回收再利用
cellulose nanocrystals
environmental benign method
oxalic acid
recycle and reuse
