中国塑料 ›› 2024, Vol. 38 ›› Issue (7): 43-48.DOI: 10.19491/j.issn.1001-9278.2024.07.008

• 材料与性能 • 上一篇    下一篇

纳米黏土与二氧化硅协同改性聚乳酸研究

王杰1(), 辛德华1, 李晖1, 蒋洪石1, 周洪福2, 赵建国3   

  1. 1.运城学院应用化学系,山西 运城,044000
    2.北京工商大学化学与材料工程学院,北京,100048
    3.煤基生态碳汇技术教育部工程研究中心,山西 大同,037009
  • 收稿日期:2023-09-19 出版日期:2024-07-26 发布日期:2024-07-24
  • 作者简介:王杰(1973—),男,教授,主要从事有机及高分子复合材料制备研究,jwang1998@163.com
  • 基金资助:
    煤基生态碳汇技术教育部工程研究中心开放基金;石墨烯林业应用国家林业和草原局重点实验室开发基金;运城市科技计划项目(YCKJ?2022045);运城学院化学重点学科建设经费

Effect of hybrid reinforcement of nanoclay and silica on properties of poly(lactic acid)

WANG Jie1(), XIN Dehua1, LI Hui1, JIANG Hongshi1, ZHOU Hongfu2, ZHAO Jianguo3   

  1. 1.Department of Applied Chemistry,Yuncheng University,Yuncheng 044000,China
    2.School of College of Chemistry and Materials Engineering,Beijing Technology and Business University,Beijing 100048,China
    3.Engineering Research Center of Coal?based Ecological Carbon Sequestration Technology of the Ministry of Education,Datong 037009,China
  • Received:2023-09-19 Online:2024-07-26 Published:2024-07-24

摘要:

以聚乳酸(PLA)为树脂基体,研究不同含量纳米黏土与2 份SiO2协同填充,对PLA复合材料结构与性能的影响。结果表明,协同填充有效改善了PLA材料的结晶行为、熔体加工性、力学韧性和气体阻隔性能。当2份的SiO2和4份黏土杂化填充时,填料分散良好,获得的PLA复合材料展示了明显的韧性断裂和气体阻隔性能。相比没有填充PLA,拉伸断裂伸长率和冲击强度分别增加151 %和74.1 %,氧气和水蒸气透气系数分别下降67.4 % 和65.0 %。过量黏土填充不利于材料韧性改善,对气体阻隔性能提高不明显。

关键词: 聚乳酸, 协同填充, 力学性能, 阻隔性能

Abstract:

PLA was adopted as a polymeric matrix to prepare PLA/nanoclay composites. The effect of the amount of nanoclay together with 2 phr SiO2 as a hybrid reinforcement on the structures and properties of the composites were investigated. The results indicated that the crystallization behaviors, melt processability, mechanical toughness, and gas barrier property of the PLA composites were significantly improved. The PLA composite with 2 phr SiO2 and 4 phr clay exhibited good filler dispersion, ductile fracture, and good gas barrier property. Compared to pure PLA, the PLA composites presented an increase in elongation at break by 151 % and in impact strength by 74.1 %. Their oxygen and water vapor permeability coefficients were reduced by 67.4 % and 65.0 %, respectively. The excessive amount of clay was disadvantageous to the toughness and also generated a slightly influence on gas barrier.

Key words: poly(lactic acid), hybrid reinforcement, mechanical property, gas barrier property

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