Epoxy toughening using self-assembled nanofibrillar scaffolds formed by organogels
學年 106
學期 2
出版（發表）日期 2018-07-04
作品名稱 Epoxy toughening using self-assembled nanofibrillar scaffolds formed by organogels
作品名稱（其他語言）
著者 Wei-Chi La; Ruey-Yi Hsia
單位
出版者
著錄名稱、卷期、頁數 Polymer 147, p.74-80
摘要 We propose a facile method for preparing toughening epoxies using self-assembled scaffolds formed by organogels. 1,3:2,4-dibenzylidene sorbitol (DBS) is a sugar derivative that is capable of self-assembling into a 3-D nanofibrillar network at relatively low concentrations in certain organic solvents to form organogels. In this work, we induced the formation of such nanofibrils in the most frequently used epoxy monomer, di-glycidyl ether of bisphenol A (DGEBA). Subsequently, we cured DGEBA in the presence of a curing agent with various amounts of DBS. The resulting materials were transparent and homogeneous epoxies with DBS nanofibrillar networks. The DBS nanofibrils in the epoxy matrix acted as reinforcing materials that enhanced the hardness and stiffness of the epoxies. Moreover, due to the entangled network structures, the toughness of the epoxies increased with increasing amounts of DBS (the maximum being an approximately 5-fold improvement). In addition, the thermal stability of the epoxies was improved by the addition of DBS, including the glass transition temperatures and thermal degradation temperatures.
關鍵字 Epoxy;Organogel;Toughness
語言 en_US
ISSN
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/115499 )