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Visualizing the toughening mechanism of nanofiller with 3d x-ray nano-ct: stress-induced phase separation of silica nanofiller and silicone polymer double networks

文献类型：期刊论文

作者Song, Lixian1,2,3; Wang, Zhen1,2; Tang, Xiaoliang1,2; Chen, Liang1,2; Chen, Pinzhang1,2; Yuan, Qingxi4; Li, Liangbin1,2
刊名Macromolecules
出版日期2017-09-26
卷号50期号:18页码:7249-7257
ISSN号0024-9297
DOI10.1021/acs.macromol.7b00539
通讯作者Chen, liang(rychen@ustc.edu.cn) ; Li, liangbin(lbli@ustc.edu.cn)
英文摘要Adding silica nanofiller in silicone rubber can toughen the matrix 3 orders in terms of fracture energy, which is far larger than most other nanofiller rubber systems. to unveil the astonishing toughening mechanism, we employ in situ synchrotron radiation x-ray nanocomputed tomography (nano-ct) technique with high spatial resolution (64 nm) to study the structural evolution of silica nanofiller in silicone rubber matrix at different strains. the imaging results show that silica nanofiller forms three-dimensional connected network, which couples with silicone chain network to construct a double-network structure. stress-induced phase separation between silica nanofiller and silicone polymer chain networks is observed during tensile deformation. unexpectedly, though the spatial position and morphology of nanofiller network changes greatly at large strains, the connectivity of nanofiller network shows negligible reduction. this indicates that nanofiller network undergoes destruction and reconstruction simultaneously, during which silica nanofiller serves as reversible high functionality cross-linker. the reversible bonding between silica nanofiller and silicone rubber or between nanofiller particles can dissipate mechanical energy effectively, which may account for the 3 orders enhancement of toughness.
WOS关键词FILLER-RUBBER INTERFACE ; CARBON-BLACK ; NATURAL-RUBBER ; DYNAMIC PROPERTIES ; QUANTITATIVE CORRELATION ; HIERARCHICAL STRUCTURES ; VISCOELASTIC BEHAVIOR ; COMPUTED-TOMOGRAPHY ; BUTADIENE RUBBER ; HYBRID HYDROGELS
WOS研究方向Polymer Science
WOS类目Polymer Science
语种英语
WOS记录号WOS:000411918700025
出版者AMER CHEMICAL SOC
URI标识http://www.irgrid.ac.cn/handle/1471x/2177076
专题高能物理研究所
通讯作者Chen, Liang; Li, Liangbin
作者单位1.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China
2.Univ Sci & Technol China, CAS Key Lab Soft Matter Chem, Hefei 230026, Peoples R China
3.Southwest Univ Sci & Technol, State Key Lab Cultivat Base Nonmet Composites & F, Mianyang 621010, Sichuan, Peoples R China
4.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Song, Lixian,Wang, Zhen,Tang, Xiaoliang,et al. Visualizing the toughening mechanism of nanofiller with 3d x-ray nano-ct: stress-induced phase separation of silica nanofiller and silicone polymer double networks[J]. Macromolecules,2017,50(18):7249-7257.
APA Song, Lixian.,Wang, Zhen.,Tang, Xiaoliang.,Chen, Liang.,Chen, Pinzhang.,...&Li, Liangbin.(2017).Visualizing the toughening mechanism of nanofiller with 3d x-ray nano-ct: stress-induced phase separation of silica nanofiller and silicone polymer double networks.Macromolecules,50(18),7249-7257.
MLA Song, Lixian,et al."Visualizing the toughening mechanism of nanofiller with 3d x-ray nano-ct: stress-induced phase separation of silica nanofiller and silicone polymer double networks".Macromolecules 50.18(2017):7249-7257.

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