纳米黏土与二氧化硅协同改性聚乳酸研究  

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

作　　者：王杰[1] 辛德华 李晖[1] 蒋洪石[1] 周洪福[2] 赵建国 WANG Jie;XIN Dehua;LI Hui;JIANG Hongshi;ZHOU Hongfu;ZHAO Jianguo(Department of Applied Chemistry,Yuncheng University,Yuncheng 044000,China;School of College of Chemistry and Materials Engineering,Beijing Technology and Business University,Beijing 100048,China;Engineering Research Center of Coal‑based Ecological Carbon Sequestration Technology of the Ministry of Education,Datong 037009,China)

机构地区：[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

出　　处：《中国塑料》2024年第7期43-48,共6页China Plastics

基　　金：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。

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。PLA was adopted as a polymeric matrix to prepare PLA/nanoclay composites.The effect of the amount of nanoclay together with 2 phr SiO_(2) 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 SiO_(2) 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.

关 键 词：聚乳酸 协同填充 力学性能 阻隔性能 

分 类 号：TQ323[化学工程—合成树脂塑料工业]