具有绿色降解自修复特性的苯氧树脂及其复合材料的制备  

Preparation of Green Degradable and Recyclable Phenoxy Resin and Its Composites

作　　者：李鑫 张钧钧 步晓君 许源 贺秋艳 陆诗婷 周钰潼 刘敏 周权[1] Xin Li;Junjun Zhang;Xiaojun Bu;Yuan Xu;Qiuyan He;Shiting Lu;Yutong Zhou;Min Liu;Quan Zhou(Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education),School of Material Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;Fuchem(Shanghai)Co.,Ltd,Shanghai 200241,China;Shanghai Great Composite Sci.&Tech.Co.,Ltd.,Shanghai 201400,China)

机构地区：[1]华东理工大学材料科学与工程学院特种功能高分子材料及相关技术教育部重点实验室,上海200237 [2]上海富晨新材料有限公司,上海200241 [3]上海固瑞泰复合材料科技有限公司,上海201400

出　　处：《高分子材料科学与工程》2023年第11期44-53,共10页Polymer Materials Science & Engineering

摘　　要：以苯硼酸(PBA)作为苯氧树脂(PO)的固化剂,采用一步法合成了一种含有可逆硼酸酯键(B—O—C)的新型苯氧树脂(POPBA30),并制备了碳纤维增强复合材料(CFRPs)。探讨了POPBA30树脂的固化过程和热性能,以及CFRPs的力学性能、热力学性能、降解性能、自修复性能及耐溶剂性能。利用红外光谱对PO、POPBA30、再生苯氧树脂(R-PO)和再生苯硼酸(R-PBA)进行了结构表征。通过差示扫描量热分析测得POPBA30的T_(g)高达206℃,热重分析测得POPBA30在空气和氮气气氛中的T_(d5)分别为411℃和399℃,800℃的质量保留率均高于38%;POPBA30还具有良好的耐化学性,可以在常见的溶剂中稳定存在21 d。以POPBA30为基体制备复合材料(CF/POPBA30),通过万能试验机测得其弯曲强度、层间剪切强度和抗张强度分别为975 MPa,55MPa和734 MPa。CF/POPBA30还具有优异的自修复性能,自修复效率约为85.6%。此外,CF/POPBA30可在室温下99%的乙醇水溶液中发生绿色降解,并实现对碳纤维和苯氧树脂的回收。Phenolphthalein boronic acid(PBA)was used as curing agent for phenoxy resin(PO)and a new phenoxy resin(POPBA30)containing reversible boronic ester bonds(B—O—C)was synthesized in one step.Carbon fiber reinforced composites(CFRPs)were also prepared.The curing process and thermal performance of POPBA30 resin were studied,and the mechanical,thermodynamic,degradation,self-healing and solvent resistance properties of CFRPs were also investigated.In this paper,PO,PO/PBA30,regenerated phenoxy resin(R-PO)and regenerated phenylboronic acid(R-PBA)were structurally characterized by FT-IR.The T_(g) of POPBA30 is measured as high as 206℃by DSC,and the Td5 of POPBA30 in air and nitrogen atmosphere is measured as 411℃and 399℃by TGA,respectively,and the mass retention at 800℃is higher than 38%;POPBA30 also has good chemical resistance and can be stabilized in common solvents for 21 d.The composite material(CF/POPBA30)was prepared using POPBA30 as matrix,and its bending strength,interlaminar shear strength,and tensile strength measured by a universal testing machine are to be 975 MPa,55 MPa,and 734 MPa,respectively.CF/POPBA30 also possesses excellent self-healing properties,and the self-healing efficiency is about 85.6%.In addition,CF/POPBA30 can be green degraded in 99%aqueous ethanol solution at room temperature,and the recycling of carbon fibers and phenoxy resins is achieved.

关 键 词：苯氧树脂 可逆硼酸酯键 绿色降解 自修复 

分 类 号：TQ327.3[化学工程—合成树脂塑料工业]