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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
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作者 李鑫 张钧钧 +6 位作者 步晓君 许源 贺秋艳 陆诗婷 周钰潼 刘敏 周权 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2023年第11期44-53,共10页
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... 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。 展开更多
关键词 苯氧树脂 可逆硼酸酯键 绿色降解 自修复
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Lacanian Interpretation of Dorian Gray’s Self-Identifying under the Influence of Others
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作者 shiting lu 《Language and Semiotic Studies》 2021年第2期86-100,共15页
In Oscar Wilde's only novel The Picture of Dorian Gray,the protagonist Dorian Gray undergoes the psychological journey from ignorance to self-realization under the influence of Others including Lord Henry Wotton,a... In Oscar Wilde's only novel The Picture of Dorian Gray,the protagonist Dorian Gray undergoes the psychological journey from ignorance to self-realization under the influence of Others including Lord Henry Wotton,artist Basil Hallward,and the magic portrait.It is due to the profound impact from the outside world that Dorian Gray alienates from his original self and remolds himself into an entity that is guided by Others.In interacting with Others,especially the intrusive patriarchal signifier,Dorian Gray acquires his self-identity through accepting and modulating his various images reflected in others'discourses,which can be interpreted in relation to the progression of three phases of Jacques Lacan's Mirror Stage Theory and three levels of semiotic complexity.A Lacanian reading of the early mirror stage of ego formation can be extended to better understand Dorian Gray's self-construction process on both a psychoanalytical and semiotic level,with an emphasis that Dorian Gray's journey to search for self is based on the powerful influence of the Others.The paper suggests that characters around Dorian Gray are playing respective roles of mother,father,and the mirror that dominate an infanfs seilf-identification between Lacanian Imaginary and Symbolic orders. 展开更多
关键词 Lacan Dorian Gray mirror stage SELF OTHER
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