環保改質的奈米鳳梨葉纖維素/聚苯乙烯複合材料之研究

Eco-friendly Modification for the Cellulose Nanofiber derived from Pineapple Leaves for Polystyrene Nanocomposites

鄒宗奇(Tsung-Chi Tsou)

指導教授 ： 石燕鳳

朝陽科技大學/理工學院/應用化學系生化科技碩博士班/碩士(2018年)

摘要

本研究採用植物纖維製備未改質與改質奈米植物纖維素，然後添加入聚苯乙烯基材中，進而對此複合材料整體性能探討與研究。FT-IR分析結果顯示，植物葉纖維經由鹼處理及酸中和處理後可以有效去除木質素及雜質。此外，植物葉纖維經由TEMPO自由基氧化反應、懸浮聚合法改質、溶膠-凝膠法改質，確實達到奈米化且將苯乙烯接枝到奈米植物纖維素表面上達到改質的效果。接觸角結果顯示，奈米植物纖維經由苯乙烯改質後，明顯的增進纖維的疏水性，得以提升奈米植物纖維與聚苯乙烯基材間的介面相容性。機械性質測試結果顯示，拉伸強度方面，都以改質奈米植物纖維素複合材料之提升效果較為明顯。由於表面改質後纖維與聚苯乙烯之間相容性提升，使得聚苯乙烯機械性質獲得有效提升。HDT測試結果顯示添加纖維後，聚苯乙烯複合材料其熱變形溫度都有上升的趨勢，其因植物葉奈米纖維素具有較佳的成核效果，能促進結晶，進而使得複合材料的熱變形溫度有提升效果。

關鍵字

聚苯乙烯 ； 奈米植物纖維 ； 懸浮聚合法 ； 溶膠-凝膠法

並列摘要

This study, plant fiber was used to prepare unmodified and modified nano-plant cellulose, which was then added into polystyrene substrate to further explore and study the overall properties of the composite. The results of FT-IR analysis showed that the plant leaf fiber could effectively remove lignin and impurities after alkali treatment and acid neutralization treatment. In addition, the plant leaf fiber is modified by TEMPO radical oxidation, suspension polymerization and Sol-gel, and it is indeed nano-sized and grafted to the surface of the nano-plant cellulose to achieve the effect of upgrading. The contact angle results show that the nano-plant fiber is modified by styrene to significantly improve the hydrophobicity of the fiber, which improves the interface compatibility between the nano-plant fiber and the polystyrene substrate. The mechanical properties test results show that the tensile strength is improved by the modified nano-plant cellulose composite material. The mechanical properties of polystyrene are effectively improved due to the improved compatibility between the fibers and polystyrene after surface modification. The results of HDT test show that the heat distortion temperature of polystyrene composites increases with the addition of fibers. It has better nucleation effect due to the better nucleation effect of plant leaf nanocellulose, which can promote the thermal deformation of composite materials. The temperature has an improvement effect.

並列關鍵字

Polystyrene ； Nano-plantfiber ； Suspension polymerization ； Sol-gel

參考文獻

1. 蘇宇傑, 台灣發泡聚苯乙烯(EPS)回收策略之研究. 台北科技大學, 2015.

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3. PS基本資料

bbs.yxx.cn/UpFile/UpAttachment/2008-6/200862924357.doc