Convenient synthetic method of starch/lactic acid graft copolymer catalyzed with sodium hydroxide

Bulletin of materials science

Qingling Wang¹  Jing Bian¹  Yingmo Hu¹  Yang Liu¹  Jianhua Zhu¹  Xue Yang¹ 

[1] School of Material Science and Engineering, China University of Geosciences, Beijing 100083, China$$School of Material Science and Engineering, China University of Geosciences, Beijing 100083, ChinaSchool of Material Science and Engineering, China University of Geosciences, Beijing 100083, China$$

关键词: Starch;    lactic acid;    graft copolymerization.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Copolymer of starch grafted with lactic acid (LA) could be directly prepared by reaction of cornstarch with lactic acid and with sodium hydroxide (NaOH) as the catalyst. The structure of starch/LA copolymer was characterized by IR, XRD, SEM and ¹H-NMR. The effects of NaOH concentration, ratios of starch and LA, reaction temperature and reaction time on the grafting degree were also investigated and the results showed that the highest grafting degree of starch could reach 33.60% when the graft copolymerization was carried out in 0.40 mol l^-1 NaOH aqueous solution for 9 h at 90°C with 1: 6 ratio of starch and lactic acid.

【 授权许可】

Unknown