期刊论文

Process optimization of polylactic acid graft starch by in-situ solid phase polymerization

Zuo, Y.

中文

功能材料

1001-9731

2019

50

3

3118-3122

10.3969/j.issn.1001-9731.2019.03.020

国家自然科学基金青年资助项目(31600460) 湖南省教育厅科学研究资助项目(15C1428) 生物质材料科学与技术教育部重点实验室(东北林业大学)开放基金资助项目(SWZCL2016-04).

本校为第一且通讯机构

为减少淀粉分子链中的亲水羟基,从而提高其与聚乳酸(PLA)树脂的界面相容性,以玉米淀粉为原料,乳酸为接枝单体,辛酸亚锡为催化剂,通过原位固相聚合法制备得到具有一定疏水性能的聚乳酸接枝淀粉(PLA-g-淀粉)。采用正交试验法研究了单体比例、反应温度和反应时间对PLA-g-淀粉接枝率的影响,通过直观分析和显著性分析优化了原位固相聚合工艺,并对疏水性、分子量及分布、糊化粘度进行了分析。结果表明,PLA-g-淀粉制备的最优工艺条件为单体比例25%、反应温度100℃和反应时间为2 h,在此工艺条件下制得PLA-g-淀粉的接枝率为20.78%。经过原位固相接枝改性后,淀粉的疏水性能得到显著改善,数均分子量(M_n)、...

In order to reduce the hydrophilic hydroxyl group in starch molecular chain and improve its interfacial compatibility with polylactic acid (PLA) resin, polylactic acid grafted starch (PLA-g-starch) with hydrophobic properties was prepared by in-situ solid-state polymerization with corn starch as raw material, lactic acid as graft monomer and stannous octoate as catalyst. The effects of monomer ratio, reaction temperature and reaction time on the grafting ratio of PLA-g-starch were studied by orthogonal test. The in-situ solid phase polymerizati...