| 引用本文: | 马艳艳,许云辉,刘娜.壳聚糖改性聚乳酸纤维的制备工艺与断裂强力研究[J].材料科学与工艺,2024,32(3):51-58.DOI:10.11951/j.issn.1005-0299.20220406. |
| MA Yanyan,XU Yunhui,LIU Na.Study on the preparation technology and breaking strength of chitosan modified polylactic acid fiber[J].Materials Science and Technology,2024,32(3):51-58.DOI:10.11951/j.issn.1005-0299.20220406. |
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| 摘要: |
| 为改善聚乳酸(PLA)纤维的力学性能,对PLA纤维进行O2等离子体-壳聚糖(CS)的联合整理,得到CS改性PLA(CS-PLA)纤维。分析研究了CS质量分数、反应温度和反应时间对纤维增重率及断裂强力的影响,探讨改性PLA纤维的最佳工艺条件,并对CS-PLA纤维进行了形貌和结构表征。结果表明,当CS质量分数为1.5%、反应温度为60 ℃、反应时间为8 h时,CS-PLA纤维的断裂强力较未改性PLA纤维提高了39.76%。扫描电镜图像显示经过复合处理后PLA纤维表面有一层均匀吸附的壳聚糖。傅里叶红外光谱表明改性后PLA纤维表面引入了羟基和氨基等官能团。X射线衍射分析显示改性后纤维结晶度增加。热重分析结果显示CS-PLA纤维的热稳定性强于未改性PLA纤维。具有优良力学性能和表面羟基与氨基官能团的CS-PLA纤维有利于PLA纤维染色性能和服用性能的提高。 |
| 关键词: 聚乳酸纤维 壳聚糖 改性 制备工艺 断裂强力 |
| DOI：10.11951/j.issn.1005-0299.20220406 |
| 分类号:TS102.6 |
| 文献标识码:A |
| 基金项目:安徽省科技重大专项(202103a06020005)；科技部“科技助力经济2020”重点专项项目(国科发资［2020］151号). |
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| Study on the preparation technology and breaking strength of chitosan modified polylactic acid fiber |
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MA Yanyan,XU Yunhui,LIU Na
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(School of Materials and Chemistry, Anhui Agricultural University, Hefei 230036,China)
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| Abstract: |
| In order to improve the mechanical properties of poly (lactic acid) (PLA) fiber, the CS-modified PLA (CS-PLA) fiber was prepared by the joint finishing of O2 plasma-chitosan (CS). The effects of CS mass fraction, reaction temperature and reaction time on the weight gain rate and breaking strength of the fiber were analyzed. The optimum technological conditions for the modification of PLA fiber were discussed, and the morphology and structure of the CS-PLA fiber were characterized. The experimental results showed that when the mass fraction of CS was 1.5%, the reaction temperature was 60 ℃ and the reaction time was 8 h, the breaking strength of CS-PLA fiber was increased by 39.76% compared with that of unmodified PLA fiber. Scanning electron microscope images showed that there was a layer of uniformly adsorbed chitosan on the surface of PLA fiber after composite treatment. Fourier infrared spectroscopy showed that hydroxyl and amino functional groups were introduced on the surface of modified PLA fiber. X-ray diffraction analysis showed that the crystallinity of the modified fibers increased. Thermogravimetric analysis shows that the thermal stability of CS-PLA fiber is stronger than that of unmodified PLA fiber. The CS-PLA fiber with excellent mechanical properties and surface hydroxyl and amino functional groups is beneficial to the improvement of dyeing properties and wearability of PLA fiber. |
| Key words: polylactic acid fiber chitosan modification preparation technology breaking strength |
