CNT-g-PDLA诱导聚乳酸构建立构复合晶体网络
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- 英文论文题名：Forming CNT-Guided Stereocomplex Networks in Polylactide-Based Nanocomposites
- 论文作者：张栋葛 ; 刘星 ; 吴国章
- 英文论文作者：Dongge Zhang ; Xing Liu ; Guozhang Wu ; School of Materials Science and Engineering ; East China University of Science and Technology
- 年：2016
- 作者机构：华东理工大学材料学院;
- 论文关键词：立构复合晶体 ; 聚乳酸 ; 纳米碳管 ; 导电网络
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第十七分会：流变学
- 语种：中文
- 分类号：O631;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十七分会 ; 流变学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：124k
- 原文格式：D
- 会议级别：全国
摘要
纳米粒子在聚合物中的空间分布一般通过接枝与基体相同的聚合物实施调控,但这种方法的难点在于接枝链与基体聚合物没有特殊相互作用[1.2]。本文试图通过PDLA与PLLA之间固有的强相互作用进一步控制CNT的分散状态。结果发现,CNT-g-PDLA填充PLLA体系中,这种强相互作用不仅可以促进CNT有效分散,大幅降低渗流导电阈值,而且沿着CNT表面可以形成PDLA和PLLA立构复合晶体。最惊喜的是,该立构复合晶体在CNT的诱导下可以形成耐高温的三维网络骨架结构。
The self-networking structure of poly(D-lactide)-grafted carbon nanotubes(CNT-g-PDLA) in poly(L-lactide)(PLLA) matrix was investigated.Specific interactions between enantiomeric pairs not only promoted CNT dispersion,but also contributed to the regular phase-separation-like CNT self-networking.Furthermore,the grafted PDLA chains preferably formed stable stereocomplex crystallites with the PLLA matrix,and the CNT self-networking resulted in the self-assembly of 3D continuous stereocomplex scaffold.It was demonstrated that the CNT-guided stereocomplex network endows polylactide-based nanocomposites with significantly improved mechanical strength,heat-resistance,and electrical conductivity at low CNT concentrations.
The self-networking structure of poly(D-lactide)-grafted carbon nanotubes(CNT-g-PDLA) in poly(L-lactide)(PLLA) matrix was investigated.Specific interactions between enantiomeric pairs not only promoted CNT dispersion,but also contributed to the regular phase-separation-like CNT self-networking.Furthermore,the grafted PDLA chains preferably formed stable stereocomplex crystallites with the PLLA matrix,and the CNT self-networking resulted in the self-assembly of 3D continuous stereocomplex scaffold.It was demonstrated that the CNT-guided stereocomplex network endows polylactide-based nanocomposites with significantly improved mechanical strength,heat-resistance,and electrical conductivity at low CNT concentrations.
引文
[1]Peng,G.;Qiu,F.;Ginzburg,V.;Jasnow,D.;Balazs,A.Science 2000,288,1802.
[2]Kumar,S.;Jouault,N.;Benicewicz,B.;Neely,T.Macromolecules 2013,46,3199.
[2]Kumar,S.;Jouault,N.;Benicewicz,B.;Neely,T.Macromolecules 2013,46,3199.