NDLI: Revealing the three-dimensional filler structure in a rubber matrix based on fluorescein modified layered double hydroxides

Content Provider	Royal Society of Chemistry (RSC)
Author	Lv, Weiyang Zheng, Qiang Song, Yihu Du, Miao Xiao, Jianliang
Copyright Year	2017
Abstract	To gain insight into nonlinear viscoelastic behavior, e.g. the Payne effect, and in situ visualize the filler structure in a rubber matrix under strain, a methodology was developed to detect and track structural evolution based on fluorescent labeling. As a model system, layered double hydroxides (LDHs) with different lateral sizes (nanosheets and microsheets) were labeled with fluorescein (FLU) and then uniformly introduced into the rubber matrix through solution blending. The strain-induced deformation and destruction of the three-dimensional LDH filler structure were directly observed for the first time through laser scanning confocal microscopy (LSCM). The contributions of the breakdown of the filler network, strain softening of the glassy layer and macromolecular disentanglement to the Payne effect were qualitatively determined and analyzed in detail based on the structural information probed via LSCM together with transmission electron microscopy, rheometry and modulated differential scanning calorimetry. The primary mechanism for the Payne effect in this system was then proposed and the macromolecular disentanglement in the rubber matrix played a key role. Furthermore, the enhanced Payne effect with increasing LDH content was ascribed to the strain amplification effect induced by the filler network for the LDH nanosheet filled system and the chain sliding on orientated LDHs for microsheet filled compounds, respectively.
Starting Page	4030
Ending Page	4038
Page Count	9
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	7
Issue Number	7
Journal	RSC Advances
DOI	10.1039/c6ra25496a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Viscoelasticity LDH Differential scanning calorimetry LSCM Transmission electron microscopy Nanosheet Fluorescein Extracellular matrix Lactate dehydrogenase Confocal microscopy Payne Layered double hydroxides
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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