淡江大學機構典藏:Item 987654321/115499
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    題名: Epoxy toughening using self-assembled nanofibrillar scaffolds formed by organogels
    作者: Wei-Chi La;Ruey-Yi Hsia
    關鍵詞: Epoxy;Organogel;Toughness
    日期: 2018-07-04
    上傳時間: 2018-11-01 12:11:21 (UTC+8)
    出版者: Elsevier
    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.
    關聯: Polymer 147, p.74-80
    DOI: 10.1016/j.polymer.2018.05.066
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

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