SiO_2纳米离子材料组分间相互作用与流变性能的调控
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- 英文论文题名：Tuning of Ionic Interaction and Rheological Properties of SiO_2-based Nanoscale Ionic Materials
- 论文作者：张宝庆 ; 刘洋健 ; 阮英波 ; 刘琛阳
- 英文论文作者：Baoqing Zhang ; Yangjian Liu ; Yingbo Ruan ; Chen-Yang Liu ; CAS Key Laboratory of Engineering Plastics ; Institute of Chemistry ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院化学研究所工程塑料院重点实验室;
- 论文关键词：纳米离子材料 ; 离子相互作用 ; 流变特性 ; 结构-性能关系
- 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：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：216k
- 原文格式：D
- 会议级别：全国
摘要
纳米离子材料(Nanoscale Ionic Materials,NIMs)是聚合物-无机纳米混杂材料的一种特殊形式,一般由表面经过修饰带上电荷的无机纳米粒子作为内核,与多个带反电荷的低聚物配对形成[1]。由于纳米离子材料具有类似于离子液体的结构特征,在没有溶剂的存在下可具有类流体的流动行为[2,3]。本研究中,以磺酸化的SiO_2纳米粒子(SiO_2-SIT)为内核,分别与叔胺型、伯氨型或双-NH_2官能团封端的PEO-PPO嵌段共聚物通过酸碱反应配对,制备出组分间相互作用强度不同的三类纳米离子材料。外层配对离子的结构改变对材料的流变性能产生显著影响。在相同的固含量条件下,所得材料的动态模量和黏度可以相差几个数量级。在大应变动态测试中,三种材料也表现出不同的响应行为。
Nanoscale ionic materials(NIMs) are novel organic-inorganic hybrid materials consisting of multi-charged inorganic nanocore that is electrostatically coupled by oppositely charged organic canopy[1].NIMs can show good fluidity even in the absence of aqueous/organic solvent as they possess some characteristics similar to those of ionic liquids[2,3].In this study,the sulfonated SiO_2 nanoparticles were used as the nanocore to prepare three kinds of SiO_2-based NIMs with different ionic interaction strengths between their constituents via acid-base reaction with the low molecular-weight PEO-PPO block copolymers of tertiary amine type,primary amine type or bi-amino-terminated.The structural variations of block copolymers had dramatic influences on the rheological properties of resulted SiO_2-based NIMs.For the materials with the same solid contents,their dynamic shear moduli and viscosities could exhibit several order-of-magnitude difference.Moreover,they showed altered behaviors under the shear of large dynamic strain.
Nanoscale ionic materials(NIMs) are novel organic-inorganic hybrid materials consisting of multi-charged inorganic nanocore that is electrostatically coupled by oppositely charged organic canopy[1].NIMs can show good fluidity even in the absence of aqueous/organic solvent as they possess some characteristics similar to those of ionic liquids[2,3].In this study,the sulfonated SiO_2 nanoparticles were used as the nanocore to prepare three kinds of SiO_2-based NIMs with different ionic interaction strengths between their constituents via acid-base reaction with the low molecular-weight PEO-PPO block copolymers of tertiary amine type,primary amine type or bi-amino-terminated.The structural variations of block copolymers had dramatic influences on the rheological properties of resulted SiO_2-based NIMs.For the materials with the same solid contents,their dynamic shear moduli and viscosities could exhibit several order-of-magnitude difference.Moreover,they showed altered behaviors under the shear of large dynamic strain.
引文
[1]Fernandes,N.J.;Wallin,T.J.;Vaia,R.A.;Koemer,H.;Giannelis,E.P.Chem.Mater.2014,26(1):84.
[2]Li,Q.;Dong,L.J.;Fang J.F.;Xiong,C.X.ACS Nano 2010,4(10):5797.
[3]Fernandes,N.J.;Akbarzadeh,J.;Peterlik H.;Giannelis,E.P.ACS Nano 2013,7(2):1265.
[2]Li,Q.;Dong,L.J.;Fang J.F.;Xiong,C.X.ACS Nano 2010,4(10):5797.
[3]Fernandes,N.J.;Akbarzadeh,J.;Peterlik H.;Giannelis,E.P.ACS Nano 2013,7(2):1265.