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題 名 | Implement Nano-education Program: Inspired through Unusual Nanocomposites Strength=落實奈米教育計畫:以特殊奈米複合材料強度為例 |
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作 者 | 賴森茂; 陳文智; 賴惠鈺; 陳俊銘; | 書刊名 | 宜蘭大學工程學刊 |
卷 期 | 7 2011.12[民100.12] |
頁 次 | 頁64-75 |
分類號 | 400.1 |
關鍵詞 | 奈米科教; 苯乙烯-乙烯/丁烯-苯乙烯嵌段共聚合物; 奈米黏土; 奈米複合材料; 問題導向教學方式; Nano-education; Styrene-ethylene-butylene-styrene block copolymer; Nanoclay; Nanocomposite; Problem-based learning; |
語 文 | 英文(English) |
中文摘要 | 為了落實奈米科學教育,本研究以過去所執行計畫之特殊材料強度案例來啓發學生,使用苯乙烯-乙烯/丁烯-苯乙烯嵌段共聚合物(SEBS)/黏土奈米複合材料,並以馬來酸酐接枝聚丙烯(Polypropylene-g-maleic anhydride, PP-g-MA)及馬來酸酐接枝苯乙烯-乙烯/丁烯-共聚合物(Styrene-ethylene-butylene-styrene block copolymer-g-maleic anhydride, SEBS-g-MA)作為相容劑。結果顯示,雖然PP-g-MA對粘土的分散性效果較SEBS-g-MA為低,但對於抗張強度與撕裂強度增進效果則較SEBS-g-MA為佳,此特殊現象代表基材及相容劑性質是決定良好機械性質的關鍵因素。藉由此案例建構之“問題導向教學方式”來激發學生,並鼓勵學生以獨立思考概念來探討他們自己的領域。結果顯示,使用此“問題導向教學方式”較未使用此教學方式的效果為佳,參與學生均給予此方式極正面的評價。 |
英文摘要 | Recently, nanotechnology has received much attention. In order to implement the nano-education into the class to have a higher impact on the students' independent thinking capability, an unusual study of earlier work was designed to allow students to understand how strength of nanocomposites was related to the types of compatibilizers used and the deformation behaviors. Styrene-ethylene-butylene-styrene block copolymer (SEBS)/clay nanocomposites were prepared via a melt mixing technique. Two types of maleated compatibilizers, styrene-ethylene-butylene-styrene block copolymer grafted maleic anhydride (SEBS-g-MA) and polypropylene grafted maleic anhydride (PP-g-MA), were incorporated to improve the dispersion of commercial organoclay (denoted as 20A) , respectively. PP-g-MA compatibilized system conferred higher tensile strength and tear strength (initiation condition) than SEBS-g-MA compatibilized system, eve n though higher dispersion of clay was found in SEBS-g-MA compatibilized system. The nanoclay conventionally claimed to enhance the mechanical properties of nanocomposites became insignificant when the deformation was confined in the nano-deformation region. These unusual results suggest that the matrix properties and compatibilize r types were crucial factors in attaining the best mechanical property performance at a specific clay content. Based on those obtained unusual results, students will be encouraged to pursue their own work in a different aspect through this problem-based learning process. The evaluation responses from students were quite positive as they were inspired to present their own work with more elaborative way by this designing approach. |
本系統中英文摘要資訊取自各篇刊載內容。