摘要
用乙醇胺对木薯淀粉进行塑化,制备了乙醇胺塑化木薯淀粉(EPTS)可生物分解材料。扫描电子显微镜(SEM)表明,原木薯淀粉颗粒被破坏,乙醇胺已经渗透到木薯淀粉颗粒内部,成功地塑化了木薯淀粉,使其成为均一连续相;将不同乙醇胺含量的EPTS在相对湿度50%(RH=50%)的环境下保存14 d,力学测试得出:w(乙醇胺)=30%塑化的EPTS拉伸应力达到7.48 MPa,应变为108%,杨氏模量和断裂能分别由乙醇胺塑化玉米淀粉(EPCS)可生物分解材料的75.32 MPa、2.305 N.m上升到EPTS的93.27 MPa、2.319 N.m,EPTS力学性能明显改善;热失重分析(TGA)显示,热失重w(EPTS)=15.89%、w(EPCS)=17.18%,EPTS热稳定性更好;材料的吸水实验显示EPTS耐水性能好于EPCS。
Biodegradable ethanolamine-plasticized tapioca starch （EPTS） was successfully prepared from plasticizer ethanolamine and tapioca starch. SEM showed that the original tapioca starch granule was destroyed, and ethanolamine penetrated into the granule interior, successfully plasticized the tapioca starch and made an uniformly continuous phase. When EPTS with different plasticizer contents stayed at RH=50% for 14 d, mechanical tests indicated that the mechanical properties of EPTS with 30% ethanolamine was the best, the tensile stress and strain reaching 7.48 MPa and 108% respectively. Young＇s module and breaking energy of EPTS were 93.27 MPa and 2. 319 N·m respectvely,while those of ethanolamine plasticized corn starch （EPCS） were 75.32 MPa and 2. 305 N·m. TGA showed that the weight loss of EPTS was 15.89%, but that of EPCS was 17.18%, demonstrating the better thermostability of EPTS. Water absorption test revealed that the water tolerance of EPTS was better than that of EPCS.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2006年第2期161-164,共4页
Fine Chemicals
基金
国家教育部博士点基金资助项目(No.200200556018)~~
关键词
可生物分解
木薯淀粉
乙醇胺
塑化
biodegrabable
tapioca starch
ethanolamine
plasticization
