李新芳,熊立贵,赵素芬,李永桂,李彭,王子扬,涂志刚.协同增容增韧聚乳酸生物降解薄膜的制备及性能研究[J].包装工程,2025,(3):33-40.
LI Xinfang,XIONG Ligui,ZHAO Sufen,LI Yonggui,LI Peng,WANG Ziyang,TU Zhigang.Preparation and Properties of Polylactic Acid Biodegradable Film with Synergistic Compatibilization and Toughening[J].Packaging Engineering,2025,(3):33-40. |
| 协同增容增韧聚乳酸生物降解薄膜的制备及性能研究 |
| Preparation and Properties of Polylactic Acid Biodegradable Film with Synergistic Compatibilization and Toughening |
| 投稿时间：2024-10-28 |
| DOI：10.19554/j.cnki.1001-3563.2025.03.005 |
| 中文关键词: 聚乳酸 聚己二酸/对苯二甲酸丁二酯 协同增容 增韧 生物降解 |
| 英文关键词: polylactic acid poly(butylene adipate-co-terephthalate) co-compatibilization toughening biodegradation |
| 基金项目:广东省普通高校创新团队项目(2023KCXTD084);广东省普通高校重点领域专项项目(2020ZDZX2099，2021ZDZX4068，2022ZDZX3084，2023ZDZX3095，2023ZDZX3096);广东省科技创新战略专项资金(“攀登计划”专项资金)项目(pdjh2023b1024);中山市社会公益科技研究重大项目(2022B2001) |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 协同改性聚乳酸(PLA)复合材料，提高其韧性，获得高韧PLA生物降解薄膜的最佳复合配比。方法 以PLA为基体，利用双螺杆挤出机将PLA、聚己二酸/对苯二甲酸丁二酯(PBAT)、聚乙二醇(PEG)和过氧化二异丙苯(DCP)熔融共混后挤出造粒，再流延挤出制得不同比例的PLA薄膜材料，并对其进行力学性能、透明性能、结晶性能以及微观结构分析等。结果 在PLA基体中加入PBAT、PEG和DCP，提高了PLA的相容性和韧性，PBAT和PEG的加入提高了PLA的结晶能力，而DCP则减弱了PLA的结晶能力。PLA/PBAT/PEG/DCP薄膜材料中各组分的最佳质量比为80∶10∶10∶0.03，此时材料纵向和横向的断裂伸长率分别为353.61%和335.37%，相比纯PLA均提高了42倍;纵向和横向拉伸强度分别为35.31 MPa和32.09 MPa，透光率为84.69%。此配比下，PLA/PBAT/PEG/DCP薄膜材料断面表面呈现均一的形貌，观察不到明显的PBAT颗粒分散相，其协同增容效果最佳，PLA的增韧增透效果显著。结论 制备了高韧PLA/PBAT/PEG/DCP生物降解薄膜，使复合材料不仅具有良好的韧性，同时具有较高的透光率，拓宽了其在包装领域和现代工业领域的应用。 |
| 英文摘要: |
| The work aims to prepare the polylactic acid biodegradable film material with high toughness by adding poly(butylene adipate-co-terephthalate) (PBAT) with good toughening performance and polyethylene glycol (PEG) as a compatibilizer and dicumyl peroxide (DCP) as a compatibilizer. Taking polylactic acid as the matrix, using a twin-screw extruder to melt and blend PLA, PBAT, PEG and DCP, then extrude and pelletize, and then extrude by casting to obtain polylactic acid film materials in different proportions. The mechanical properties, transparency properties, crystallization properties and micro-morphology of PLA biodegradable film materials were analyzed. The research shows that the compatibility and toughness of PLA are improved and the addition of PBAT and PEG improves the crystallization ability of PLA, while DCP weakens the crystallization ability of PLA. When the optimal mass ratio of each component in the PLA/PBAT/PEG/DCP film material is 80∶10∶10∶0.03, the longitudinal and transverse elongation at break of the material are 353.61% and 335.37% respectively, which is 42 times higher than that of pure PLA. The longitudinal and transverse tensile strengths are 35.31 MPa and 32.09 MPa respectively, and the light transmittance is 84.69%. Under this ratio, the cross-section surface of the PLA/PBAT/PEG/DCP film material presents a uniform morphology, and no obvious PBAT particle dispersed phase can be observed. Obviously, the synergistic compatibilization effect is the best, and the toughening and light transmittance enhancement effect of PLA is remarkable. Therefore, a high-toughness polylactic biodegradable film can be obtained, making the composite material not only have good toughness but also have a relatively high light transmittance, broadening its applications in the packaging field and modern industrial fields. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501716号