研究生: |
葉惠珠 Hui-Chu - Yeh |
---|---|
論文名稱: |
射出成形抗水解聚乳酸複合材料之製備與特性分析 Preparation and Characterization of PLA Composites for Anti-Hydrolysis Properties by Injection Molding |
指導教授: |
陳炤彰
Chao-Chang Chen |
口試委員: |
楊申語
none 吳昌謀 none 鄭逸琳 Yih-Lin Cheng 劉松柏 none |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 機械工程系 Department of Mechanical Engineering |
論文出版年: | 2017 |
畢業學年度: | 105 |
語文別: | 中文 |
論文頁數: | 259 |
中文關鍵詞: | 聚乳酸複材 、生物可分解 、有機蒙脫土 、抗水解 、射出成形 |
外文關鍵詞: | Polylactic acid composites, Organic |
相關次數: | 點閱:300 下載:9 |
分享至: |
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本研究為研製一種新型聚乳酸複合材料,將PLA基質材料添加有機蒙脫土、擴鏈劑和抗水解劑進行抗水解聚乳酸複材製備與射出成形試片製作,並分析射出成形試片之性能及牙刷試製品可行性。研究方法為利用雙螺桿押出機混煉及射出成型製備抗水解聚乳酸複材,並探討該複材熱性質、抗水解性質、機械性等影響,解決PLA高溫易水解、耐熱性差的問題。配方添加有機蒙脫土(OMMT,93A)提高複材機械強度;擴鏈劑(Chain Extender)、聚碳二亞胺(Poly Carbodiimide) 抗水解劑(Anti-Hydrolytic Agent),賦予聚乳酸複材抗水解效能。本研究以性能最佳配方進行重現性確認外,另進行牙刷成品試製。實驗結果顯示:含有機蒙脫土聚乳酸複合材之射出成形試片耐衝擊強度增加23.0%,拉伸應變率增加3.5倍。熱性能Tg與Td 各提升5~8℃,可改善聚乳酸耐熱差問題。另PLA添加擴鏈劑及抗水解劑後,複合材料平均吸水率7.1%,抗水解率大於75%,有效強化聚乳酸抗水解性能。目前牙刷試製品在水解條件下,抗水解壽命達2週,可作加速聚乳酸複材降解參考條件,有利低碳成品開發與設計,更可達到友善生態環境目標。此成果未來可應用於民生防水用品和即棄診療用品範疇。
This study is to develop a new PLA (polylactic acid) composite materials containing modified organic montmorillonite (OMMT), anti-hydrolytic agent and chain-extender for reducing degradation behaviour of the composites by injection molding. The hydrolysis problem of PLA composites at high temperature needs to be solved the overcome heat resistance weakness. Preparation of this PLA composites is to use a twin-screw extruder compounding in this research. The mechanical properties, thermal properties. Adding organic montmorillonite (OMMT) can improve the tensile strength of PLA composite material, and adding polymer chain extender and polycarbodiimide anti-hydrolytic agent can increase the hydrolysis resistance of PLA composites. The optimal formula and its reproducibility test have been studied and the pilot production including a commercial toothbrush products have been completed. Results show that the impact strength of the composites increased by 23.0%, the tensile strength is 72.49 MPa and the tensile strain rate is 3.5 times when the modified montmorillonite is added into PLA matrix. Glass transition temperature Tg and thermal degradation temperature Td increas 5~8 ℃, that demonstrate the improvement of heat resistance of PLA. After adding the anti-hydrolytic agent and chain-extender, the average water absorption of the composites is 7.1%. The MFR is 13.48 g/10min.and the inhibition rate of hydrolysis is more than 75%. which effectively conferred the hydrolysis resistance of polylactic acid. Under the conditions of hydrolysis 70 ℃@95RH%, the product AJ-100 has a hydrolysis-resistant life time of 2 weeks. It can be used as a reference condition for accelerating the degradation of polylactic acid composite materials and reaching the goal of friendly environment. Outcome of this research can be applied to consumer goods. such as Cinerary urn. agricultural capsule fertilizer. and disposable medical supplies for future applications.
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