摘要
以玉米淀粉、一氯乙酸及辛烯基琥珀酸酐为原料,通过2步反应制备了辛烯基琥珀酸酯-羧甲基油水两亲性淀粉(OS-CMS)。采用红外光谱进行结构表征;用X射线衍射仪进行薄膜结晶度测试。通过力学性能测试,研究了在不同油水官能团摩尔比及变性程度对OS-CMS薄膜力学性能的影响。结果表明,经变性后的OS-CMS薄膜结晶度降低;随着摩尔比的提高,OS-CMS薄膜的断裂强度有所上升,断裂伸长率先上升后下降,最终提高了薄膜的韧性,在2种官能团摩尔比为1∶1时,薄膜的断裂伸长率最大;随着变性程度的提高,OS-CMS薄膜的断裂强度与断裂伸长率也逐渐增加,进一步改善了力学性能。
To overcome the rigid and brittle defects of starch films,the octenylsuccinate-carboxymethyl oil-water amphiphilic starch(OS-CMS)was synthesized through a two-step reaction using corn starch,chloroacetic acid and octenylsuccinic anhydride as raw materials.The chemical structure and crystallinity of the resulting films were characterized by Fourier-transform infrared spectroscopy and X-ray diffraction,respectively,and the mechanical evaluation were conducted for the samples at different molar ratios of functional groups and degrees of starch modification.The results indicated that the surface modification led to a decrease in crystallinity of OS-CMS films.The breaking strength of OS-CMS films increased with an increase of molar ratio,but their elongation at break increased at first and then tended to decrease.As a result,the films achieved an improvement in toughness.The OS-CMS films obtained a maximum value in elongation at break at the OS/CMS molar ratio of 1/1,and their breaking strength and elongation at break were found to increase gradually with an increase of the degree of denaturation,indicating an enhancement in mechanical performance.
作者
宋彦志
祝志峰
李世安
SONG Yanzhi;ZHU Zhifeng;LI Shian(Key Laboratory of Textile Fabrics of Anhui Province,Anhui Polytechnic University,Wuhu 241000,China;Xuzhou Zhongheng Starch Technology Co,Ltd,Xuzhou 221000,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2020年第4期25-29,共5页
China Plastics
基金
安徽省高校领军人才团队项目(2015LJRCTD001)。
关键词
淀粉膜
力学性能
两亲性淀粉
摩尔比
变性程度
starch film
mechanical property
amphiphilic starch
molar ratio
modification level
