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Surface modification of silica and its compounding with polydimethylsiloxane matrix: interaction of modified silica filler with PDMS

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Abstract

The present work involved a thorough study on silane-modified silica filler with special focus on its chemical interaction with polydimethylsiloxanes (PDMS) and the structural model of the modified filler. The samples prepared by addition of modified silica were characterized by Fourier transform infrared spectroscopy (FTIR), specific surface test, scanning electron microscopy (SEM) and fluorescent microscope. FTIR results confirmed the successful silica surface modification with silane coupling agent. The sample containing 80 phr (parts per hundreds of rubber) modified filler with weak ratio of Si–OH/Si–C group absorbance areas (A 1/A 0) showed weak formation of filler agglomerates while a stronger interfacial interaction could take place between the modified silica and PDMS. Specific surface results showed that the dispersion of silica can be improved when the amount of silane modifier to silica reached 2.0 wt%. SEM and fluorescent microscope showed that the filler aggregation was observed in cases of higher silica loading. As expected, when the silica with surface treatment was compared with those without surface modification, the filler particles were found to be fairly well dispersed in PDMS matrix.

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Acknowledgments

This work has been supported by the Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period in China (2006BAB04A05).

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Authors and Affiliations

  1. School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan, 430023, People’s Republic of China

    Jiesheng Liu, Minhu Zou, **ongzhen Zheng & Zhengang Cai

  2. Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan, 430070, People’s Republic of China

    Jiesheng Liu & Shaopeng Wu

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  1. Jiesheng Liu
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  2. Shaopeng Wu
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  3. Minhu Zou
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Correspondence to Jiesheng Liu.

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Liu, J., Wu, S., Zou, M. et al. Surface modification of silica and its compounding with polydimethylsiloxane matrix: interaction of modified silica filler with PDMS. Iran Polym J 21, 583–589 (2012). https://doi.org/10.1007/s13726-012-0062-x

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  • DOI: https://doi.org/10.1007/s13726-012-0062-x

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