摘要
为了促进纤维素纺丝废液中木质素的回收再利用,将回收得到的木质素磺酸钙(CLS)经改性后与纤维素(CELL)共混制备复合薄膜。以Fe^(2+)-H_2O_2为引发剂,通过自由基共聚反应,制备了CLS与甲基丙烯酸甲酯(MMA)的接枝共聚物CLS-g-PMMA,并通过红外光谱法、差示扫描量热仪和热失重测试对制备的CLS-g-PMMA进行了表征。将按不同CLS/MMA比例制备的CLS-g-PMMA与CELL共混溶解在一定比例的离子液体/DMSO复合溶剂中制成复合膜。结果表明,CLS-g-PMMA的热稳定性提高,当CLS/MMA比例(g/m L)为1:3时复合膜力学性能总体较好,吸湿性与透光性也较好。
In order to promote the recycling of lignin in the cellulose spinning waste liquor, the recycled calcium lignosulfonate （CLS） was modified and blended with cellulose （CELL） to prepare composite membranes. Grafted CLS with methyl methacrylate （MMA） was synthesized by way of free radical copolymerization using Fe^2＋-H2O2 as initiator. The modified products （CLS-g-PMMA） were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry and thermogravimetric analysis. Composite membranes of CLS-g-PMMA/CELL were prapared with ionic liquid/DMSO as composite solvent. The results showed that the thermal stability of CLS-g-PMMA was improved. When CLS/MMA ratio （g/mL） was 1 ： 3, a strong comprehensive mechanical property as well as better moisture absorption rate and transmittance could be obtained in the composite membranes.
出处
《纤维素科学与技术》
CAS
CSCD
2016年第2期1-7,28,共8页
Journal of Cellulose Science and Technology
基金
国家自然科学基金青年基金(51503032)
上海市杨帆计划(14F1405200)
江苏省前瞻性战略新产品专项基金(BY2012246)
中央高校基本科研业务费专项资金(2232015D3-08)
关键词
木质素磺酸钙
甲基丙烯酸甲酯
接枝共聚
纤维素
复合膜
calcium lignosulfonate
methyl methacrylate
grafting copolymerization
cellulose
composite membrane
