异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能  

Structure and Properties of Biodegradable Poly(butylene adipate terephthalate)/Polylactic Acid Packaging Films with Isophorone Diisocyanate as Reactive Compatibilizer

作　　者：毛帅 龚佳荣 孙文涛 宁博远 罗耀发 许平凡[1] 刘源森 蓝小平[4] 章培昆 刘渊 Shuai Mao;Jiarong Gong;Wentao Sun;Boyuan Ning;Yaofa Luo;Pingfan Xu;Yuansen Liu;Xiaoping Lan;Peikun Zhang;Yuan Liu(School of Advanced Manufacturing,Fuzhou University,Jinjiang 362251,China;Third Institute of Oceanography,Ministry of Natural Resources,Technical Innovation Center for Utilization of Marine Biological Resources,Xiamen 361005,China;Polymer Research Institute,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China;Fujian Luge Novel Material Technology Co.,Ltd,Jinjiang 362261,China)

机构地区：[1]福州大学先进制造学院,福建晋江362251 [2]自然资源部第三海洋研究所自然资源部,海洋生物资源开发利用工程技术创新中心,福建厦门361005 [3]四川大学高分子研究所高分子材料工程国家重点实验室,四川成都610065 [4]福建绿格新材料科技有限公司,福建晋江362261

出　　处：《高分子材料科学与工程》2023年第8期148-155,共8页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(52003036);福建省海洋经济发展专项资金项目(FJHJF-L-2022-7);厦门海洋研究开发院共建项目(KFY202203);高分子材料工程国家重点实验室开放课题基金(sklpme2022-4-02);福建省科技计划(2021Y0065);福州大学科研启动项目(XRC-22038,XRC-22039);福州大学开放测试基金(2022T030,2022T031);基本科研业务费专项资金(2017028)。

摘　　要：以异佛尔酮二异氰酸酯(IPDI)为聚己二酸-对苯二甲酸丁二酯/聚乳酸(PBAT/PLA)共混物的增容剂,通过熔融共混法制备了PBAT/PLA/IPDI共混粒子并吹制得到薄膜。采用红外光谱、扫描电镜、差示扫描量热分析、拉伸试验、热重分析和水蒸气透过率测试等研究了不同含量IPDI对共混薄膜形态结构、结晶性能、力学性能、热性能和阻隔性能的影响。结果表明,IPDI的异氰酸酯基团能与PBAT和PLA发生化学反应,分散相尺寸变小,两相界面变得模糊,有效改善了共混物的相容性。随着IPDI含量的增加,共混物中PBAT的结晶度升高,薄膜的拉伸强度逐渐增大,水蒸气阻隔性能呈现先增大后减小的趋势。当IPDI质量分数为0.5%时,PBAT/PLA/IPDI薄膜的横纵向拉伸强度相较于纯PBAT/PLA薄膜分别提升了74.2%和28.6%,断裂伸长率维持在790%和244%,水蒸气透过率降低了38.2%,表现出良好的力学和水蒸气阻隔等综合性能。Isophorone diisocyanate(IPDI)as reactive compatibilizer was introduced into poly(butylene adipate terephthalate)(PBAT)/polylactic acid(PLA)blend by melt blending and extruded into blown films.The effect of IPDI content on the phase morphology,crystallization behavior,mechanical,thermal and barrier properties of PBAT/PLA/IPDI blended films were investigated by Fourier transform infrared spectroscopy(FT-IR),scanning electron microscope(SEM),differential scanning calorimeter(DSC),universal tensile testing machine,thermogravimetric analyzer(TGA)and water permeability tester.Results demonstrate that the—NCO groups of IPDI can chemically react with PBAT and PLA to form copolymer,which reduces the particle size of PLA dispersed phase and leads to indistinct interface between the two-phase,effectively improving the interfacial compatibility between PBAT and PLA matrix.With increasing the IPDI content in PBAT/PLA/IPDI films,the crystallization ability of PBAT matrix and tensile strength increase,whilst the water vapor barrier performance increases first and then decreases.When the mass fraction of IPDI is 0.5%,compared with the pristine PBAT/PLA film,the PBAT/PLA/IPDI packaging film shows 74.2%and 28.6%enhancement in tensile strength on the transverse direction and machine direction,respectively,maintains decent breaking elongation of 790%and 244%,meanwhile,38.2%reduction in water vapor permeability coefficient,which suggests the balanced overall mechanical and water vapor barrier properties.

关 键 词：聚己二酸-对苯二甲酸丁二酯 聚乳酸 反应增容 水蒸气阻隔性能 生物降解 

分 类 号：TB383[一般工业技术—材料科学与工程]