麦糟/PBAT/PLA复合泡沫的制备及其性能研究  

Preparation and Properties of Grains/PBAT/PLA Composite Foam

作　　者：刘瑞冰 唐秋霜 刘加好 涂进忠 陈志伟 唐振恺 孙策 谭海彦[1,2] 张彦华[1,2] LIU Ruibing;TANG Qiushuang;LIU Jiahao;TU Jinzhong;CHEN Zhiwei;TANG Zhenkai;SUN Ce;TAN Haiyan;ZHANG Yanhua(Key Laboratory of Bio-based Material Science&Technology Ministry of Education,Northeast Forestry University,Harbin 150040,China;Engineering Consulting and Design Research Institute Co.,Ltd.,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,哈尔滨150040 [2]东北林业大学工程咨询设计院研究有限公司,哈尔滨150040

出　　处：《包装工程》2024年第23期19-28,共10页Packaging Engineering

基　　金：国家自然科学基金(32071692);东北林业大学大学生创新训练项目(202410225180);东北林业大学工程咨询设计院研究有限公司碳中和基金。

摘　　要：目的为提升聚己二酸丁二醇酯和对苯二甲酸丁二醇酯(PBAT)超临界二氧化碳(CO_(2))发泡性能,探究复合泡沫在疏水隔热可降解包装领域的应用。方法使用硅烷偶联剂KH550对麦糟(Gr)进行改性,随后探究使用超临界CO_(2)对不同比例的麦糟/PBAT/聚乳酸(PLA)复合材料进行发泡实验。最终通过密度测试、红外光谱、扫描电子显微镜、差示量热扫描测试、压缩回弹性能测试以及导热测试,研究了不同比例改性前后麦糟对复合泡沫发泡性能的影响。结果经KH550改性得到的改性麦糟(KGr)与PBAT/PLA基体的相容性得到显著提升,麦糟可作为结构骨架支撑复合泡沫泡孔结构。PBAT/PLA复合泡沫放置14 d后发泡倍率减少54.4%,但麦糟/PBAT/PLA复合泡沫放置14 d后体积几乎不变。15%KGrPBAT/PLA复合泡沫的接触角达到125.4°,明显高于PBAT/PLA复合泡沫的114.3°,15%KGr-PBAT/PLA复合泡沫抗压缩性能最佳。此外,15%KGr-PBAT/PLA复合泡沫隔热性能也优于PBAT/PLA复合泡沫。结论麦糟可作为骨架结构支撑PBAT/PLA复合泡沫的泡孔;同时,使用KH550改性后的麦糟与PBAT/PLA基体的相容性变好,改性麦糟可显著提升麦糟/PBAT/PLA复合泡沫的发泡性能、疏水性能以及导热性能,从而应用于包装材料。The work aims to improve the foaming performance of poly(butylene adipate-co-terephthalate)in supercritical carbon dioxide(CO_(2)),and explore the application of foam in the field of hydrophobic and thermal insulation degradable packaging.Grains(Gr)were modified with silane coupling agent KH550,and then the effect of supercritical CO_(2) on the foaming properties of grains/PBAT/polylactic acid(PLA)composites with different proportions was investigated.In addition,the effects of grains ratio before and after modification on the foaming performance were investigated through density testing,infrared spectroscopy,SEM,DSC,compressive resilience testing and thermal conductivity testing.The compatibility of the modified grains(KGr)with PBAT/PLA matrix was significantly improved after KH550 modification,and the grains could be used as structural framework to support the bubble structure of the foam.The foaming ratio of PBAT/PLA foam was reduced by 54.4%after 14 days of placement,but the volume of grains/PBAT/PLA foam was almost unchanged after 14 days of placement.The contact angle of 15%KGr-PBAT/PLA foam reached 125.4°,which was significantly higher than 114.3°of PBAT/PLA foam.The thermal insulation performance of 15%KGr-PBAT/PLA composite foam was also better than that of PBAT/PLA foam.The grains can be used as skeleton structure to support the pore of PBAT/PLA composite foam;at the same time,the grains modified by KH550 have better compatibility with PBAT/PLA matrix.The modified grains could significantly improve the foaming properties,hydrophobic properties and thermal conductivity of the grains/PBAT/PLA composite foam,so as to be applied to packaging materials.

关 键 词：聚己二酸丁二醇酯和对苯二甲酸丁二醇酯 聚乳酸 麦糟 复合泡沫 

分 类 号：TB484.2[一般工业技术—包装工程]