荧光素改性层状双金属氢氧化物在橡胶基体中的三维结构示踪
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- 英文论文题名：Revealing the three-dimensional filler structure in rubber matrix based on a fluorescein modified layered double hydroxide
- 论文作者：吕维扬 ; 杜淼 ; 郑强
- 英文论文作者：Wei Yang Lv ; Miao du ; Qiang Zheng ; MOE Key Laboratory of Macromolecular Synthesis and Functionalization ; Department of Polymer Science and Engineering ; Zhejiang University
- 年：2016
- 作者机构：浙江大学高分子科学与工程学系教育部高分子合成与功能构造重点实验室;
- 论文关键词：层状双金属氢氧化物 ; 荧光 ; 流变行为 ; Payne效应
- 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：TQ330.1
- 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：126k
- 原文格式：D
- 会议级别：全国
摘要
Payne效应是研究填充橡胶材料动态行为的重要窗口,其机理之一为填料聚集体的团聚-解聚行为~([1,2])。普通光学显微镜较低的分辨率以及电子显微镜受限的操作环境导致填料在不同应变下的结构变化难以被观察到~([3])。本工作利用荧光素钠与层状双金属氢氧化物(LDH)的静电作用制备出荧光改性的微米级和纳米级LDH,通过溶液共混令填料均匀分散于橡胶基体。利用激光共聚焦显微镜(LSCM)观察LDH聚集体在不同应变下的结构变化,实现了填料在橡胶基体中的实时观察。采用透射电子显微镜、旋转流变仪、示差扫描量热计等测试将粒子聚集体的形态变化与填充橡胶的流变行为结合起来,结果表明低填充下橡胶的Payne效应主要来源于基体分子链解缠结,微米级LDH可促进分子链解缠结,增强体系Payne效应幅度。
Payne effect with the general concept that comes from the filler agglomeration-deagglomeration,is an important window to study the dynamic behavior of filled rubber materials.It is a fundamental challenge to characterize the filler structure under different strains due to the low resolution of optical microscope and the limited operating environment of electron microscope.In this work,fluorescein modified layered double hydroxides were uniformly introduced into the rubber matrix through solution blending method,and laser scanning confocal microscopy(LSCM) was employed to monitor the filler structure under different strains.Based on the results including transmission electron microscope,rheometer and differential scanning calorimetry,the primary mechanism for Payne effect in this system is mainly associated with the entanglement network in rubber matrix,and LDH microsheets could enhance the Payne effect.
Payne effect with the general concept that comes from the filler agglomeration-deagglomeration,is an important window to study the dynamic behavior of filled rubber materials.It is a fundamental challenge to characterize the filler structure under different strains due to the low resolution of optical microscope and the limited operating environment of electron microscope.In this work,fluorescein modified layered double hydroxides were uniformly introduced into the rubber matrix through solution blending method,and laser scanning confocal microscopy(LSCM) was employed to monitor the filler structure under different strains.Based on the results including transmission electron microscope,rheometer and differential scanning calorimetry,the primary mechanism for Payne effect in this system is mainly associated with the entanglement network in rubber matrix,and LDH microsheets could enhance the Payne effect.
引文
[1]Payne,A.R.J.Appl.Polym.Sci.1960,3:127.
[2]Rharbi,Y.;Cabane,B.;Vacher,A.et al.Europhys.Lett.1999,46:472.
[3]Mauro,Z.;Paul,H.M.ACS.Nano.2011,5:3391.
[2]Rharbi,Y.;Cabane,B.;Vacher,A.et al.Europhys.Lett.1999,46:472.
[3]Mauro,Z.;Paul,H.M.ACS.Nano.2011,5:3391.