PLA/MRPs乳液膜的制备及性能研究  

Preparation and Properties of PLA/MRPs Emulsion Film

作　　者：谢宜彤 王一宁 吕艳娜 王海松 XIE Yitong;WANG Yining;LYU Yanna;WANG Haisong(College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian,Liaoning Province,116034)

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《中国造纸》2020年第11期25-29,共5页China Pulp & Paper

基　　金：辽宁省教育厅科学研究项目(J2020040);制浆造纸工程国家重点实验室开放基金资助项目(201802)。

摘　　要：以碱溶性半纤维素木聚糖和玉米醇溶蛋白合成的美拉德反应产物(MRPs)纳米颗粒水溶液为水相、聚乳酸/二氯甲烷溶液(PLA/DCM)为油相,通过乳液聚合法和模压成型工艺制备了PLA/MRPs乳液膜。分别利用傅里叶变换红外光谱仪、热重分析仪、扫描电子显微镜和紫外可见吸收光谱仪分析了PLA/MRPs复合材料的形貌结构和抗氧化性能,并对PLA/MRPs乳液膜的力学性能进行了探究。探讨了MRPs纳米颗粒水溶液的质量分数对PLA/MRPs乳液膜的抗氧化性能和力学性能的影响。结果表明,制得的PLA/MRPs复合材料具有水包油型结构,以质量分数0.50%MRPs制备的PLA/MRPs乳液膜在反应时间为30 h后,DPPH自由基清除率最大,为26.55%;而随着MRPs质量分数的增加,PLA/MRPs乳液膜的拉伸强度和断裂伸长率逐渐降低。Maillard reaction products(MRPs)were prepared by reaction between alkali-soluble hemicellulose xylan and zein,then Picker⁃ing emulsion polymerization and compression molding method were used to prepare PLA/MRPs emulsion films,in which MRPs nanoparticles solution was as water phase,and PLA/DCM was as oil phase.The morphology,antioxidant properties and mechanical properties of the films were measured by using Fourier transform infrared(FT-IR),thermogravimetric analysis(TG),scanning electron microscope(SEM),uvvis absorption spectra and universal testing machine respectively.Effects of dosage of MRPs nanoparticles solution on antioxidant and me⁃chanical properties of PLA/MRPs emulsion films were discussed.The results indicated that PLA/MRPs composite materials were oil-in-water structure,and after 30 h test,DPPH free radical scavenging rate of PLA/MRPs emulsion films prepared with 0.50%MRP reached maximum level of 26.55%.However,tensile strength and elongation at break of PLA/MRPs emulsion films decreased with the increase of MRPs dos⁃age.

关 键 词：MRPS Pickering乳液聚合 抗氧化性能 力学性能 

分 类 号：O636[理学—高分子化学] TS69[理学—化学]