脱胶处理对单向蚕丝/PCL复合材料性能的影响  

Effect of degumming treatment on properties of one-way silk/PCL composites

作　　者：苏妮妮 吴莹 田伟[1] 祝成炎[1] SU Nini;WU Ying;TIAN Wei;ZHU Chengyan(College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学纺织科学与工程学院(国际丝绸学院),杭州310018

出　　处：《现代纺织技术》2024年第11期81-88,共8页Advanced Textile Technology

基　　金：浙江省雏鹰计划培育项目(23200053-M)。

摘　　要：针对聚己内酯(PCL)力学强度不足的问题,以单向蚕丝片为增强体,PCL为树脂基体,通过热压成型工艺制备了单向蚕丝/PCL复合材料。为了获得界面结合良好的单向蚕丝/PCL复合材料,采用Na_(2)CO_(3)溶液对单向蚕丝片进行脱胶处理。利用扫描电镜、接触角测定仪、万能强力仪、摆锤冲击试验机、热重分析仪等研究了不同质量分数的Na_(2)CO_(3)溶液脱胶处理对单向蚕丝片表面性质及蚕丝/PCL复合材料力学性能和热稳定性能的影响。结果表明:经过脱胶处理后,单向蚕丝片浸润性改善;在质量分数为1.5%Na_(2)CO_(3)溶液中脱胶1 h后,蚕丝表面丝胶基本除尽,树脂基体对单向蚕丝片浸润效果良好,复合材料中单向蚕丝片与PCL基体结合紧密,单向蚕丝/PCL复合材料的力学性能最好;与未脱胶单向蚕丝/PCL复合材料相比,脱胶后的弯曲强度和冲击强度提高了87.06%和56.25%;单向蚕丝片脱胶处理后,单向蚕丝/PCL复合材料的热稳定性能变好。脱胶处理后的单向蚕丝片作为增强体应用于可降解复合材料中,获得的单向蚕丝/PCL复合材料界面结合良好、力学性能优良,表明其在可降解天然纤维增强复合材料领域中应用潜力巨大。In recent years,with the popularity of the concept of green environmental protection and low-carbon development,biodegradable natural fiber reinforced composites have become a hot research point in the field of polymer material research.In this paper,one-way silk sheet was used as reinforcement,polycaprolactone was used as resin matrix,and one-way silk sheet was degummed with different mass fractions of Na_(2)CO_(3)solution.The effects of different mass fractions of Na_(2)CO_(3)solution on the surface morphology and wettability of one-way silk sheet were investigated.One-way silk/PCL composites were prepared by hot pressing molding,and the effects of degumming treatment of one-way silk sheet on the interfacial bonding,mechanical properties and thermal stability of composites were studied.In this study,0.0%,0.5%,1.0%,1.5%and 2.0%Na_(2)CO_(3)solutions were used to degum the one-way silk sheet after drying.The degumming rate was calculated and the contact angle was tested.The surface micro-topography of the one-way silk sheet before and after degumming was photographed by SEM.The degummed one-way silk sheet was immersed in PCL solution,and then the one-way silk/PCL composites were taken out and tiled in a ventilated environment.After the volatilization of dichloromethane,the one-way silk/PCL composites were prepared by tiled hot pressing.The bending resistance and impact resistance of one-way silk/PCL composites were tested,and the cross-section morphology of one-way silk/PCL composites before and after degumming treatment was photographed by SEM.The effect of one-way silk sheet degumming on the thermal stability of one-way silk/PCL composites was studied by thermogravimetric analysis.The results showed that with the increase of Na_(2)CO_(3)mass fraction,the sericin,grease and impurities on the surface of silk were gradually removed,the one-way silk sheet performed better in wettability and became looser,the infiltration effect of resin matrix on one-way silk sheet became better,the combination of silk and PCL matri

关 键 词：蚕丝 聚己内酯 复合材料 蚕丝脱胶 热压 力学性能 热稳定性能 

分 类 号：TS14[轻工技术与工程—纺织材料与纺织品设计]