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)
王杰 1辛德华 1李晖 1蒋洪石 1周洪福 2赵建国3
作者信息
- 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
- 折叠
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.
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 inves-tigated.The results indicated that the crystallization behaviors,melt processability,mechanical toughness,and gas barri-er property of the PLA composites were significantly improved.The PLA composite with 2 phr SiO2 and 4 phr clay ex-hibited good filler dispersion,ductile fracture,and good gas barrier property.Compared to pure PLA,the PLA compos-ites presented an increase in elongation at break by 151%and in impact strength by 74.1%.Their oxygen and water va-por permeability coefficients were reduced by 67.4%and 65.0%,respectively.The excessive amount of clay was dis-advantageous 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Key words
poly(lactic acid)/hybrid reinforcement/mechanical property/gas barrier property引用本文复制引用
基金项目
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()
出版年
2024
国家科技期刊平台
NSTL
万方数据