原位聚合聚乳酸基纳米复合材料及其降解行为  

Polylactide based nano-composite prepared by in situ polymerization and its degradation behavior

作　　者：曹海雷[1,2] 王鹏[1,2] 袁维波[1] 李媛[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [2]哈尔滨工业大学市政环境工程学院,绿色化学与技术研究中心,黑龙江哈尔滨150090

出　　处：《合成树脂及塑料》2010年第5期74-78,共5页China Synthetic Resin and Plastics

基　　金：哈尔滨市科技攻关项目(2005AA4CS112)

摘　　要：采用微波技术替代传统热源,以D,L-丙交酯为原料,加入纳米有机蒙脱土(OMMT)及增塑剂聚乙二醇(PEG)进行原位插层聚合制备聚乳酸(PLA)/OMMT/PEG纳米复合材料。在微波功率90 W下作用10 min,w(OMMT)和w(PEG)分别为1%,0.8%时,复合材料拉伸强度达15.39 MPa,拉伸断裂应变为11.67%,热失重中心温度提高6.6℃。形貌分析结果表明,OMMT以剥离形态均匀分散于PLA中,复合材料趋向于韧性断裂。土壤填埋实验结果表明,该复合材料具备更好的降解性能。Polylactide（PLA） based nano-composite was prepared by in situ intercalation polymerization with D,L- lactide, nano organo-montmorillonite（OMMT） and plasticizer poly（ethylene glycol） （PEG） under microwave irradiation in place of conventional heat resource. When the reactants were irradiated at 90 W for 10 min and the mass content of the OMMT and PEG were 1% and 0.8%, respectively, the tensile strength and tensile strain at break of the resultant nano-composite reached 15.39 MPa and 11.67%, respectively. The central temperature of heating mass loss of the nano-composite was elevated by 6.6 ℃ compared with pure PLA. The morphological analyses show that the OMMT with exfoliated structure is evenly dispersed in the polymer matrix, and the nano-composite tends to be of ductile rupture. The soil-burial degradation experiment reveals that the PLA/OMMT/PEG nano-composite possesses a superior degradation performance.

关 键 词：聚乳酸 纳米复合材料 微波 聚乙二醇 有机蒙脱土 

分 类 号：TB383.1[一般工业技术—材料科学与工程]