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Preparation and Characterization of Natural Rubber/Silica Nanocomposites using Rule of Similarity in latex

Journal of Wuhan University of Technology(Materials Science) 2013年第5期28卷 997-1002页

作者：罗勇悦 FENG Chunfang WANG Qinghuang YI Zhifeng QIU Quanfang Kong LX 彭政 Key Laboratory of Tropical Crop Product Processing Chinese Agricultural MinistryAgricultural Product Processing Research InstituteChinese Academy of Tropical Agricultural Sciences Centre for Material and Fiber Innovation Institute for Technology Research InnovationDeakin University State Engineering and Technology Research Center for Key Tropical Crops

Rule of similarity and latex compounding techniques were combined for the first time to prepare natural rubber/nanosilica （NR/SiO2） nanocomposite with core-shell nanosilica-poly （methyl methacrylate）（SiO2-PMMA） particles and PMMA-modified natural rubber matrix （NR-PMMA）. The micro- structure of SiO2 and nanocomposites with different SiO2 contents was characterized by fourier transform infrared spectroscopy （FTIR）; the morphology of nanocomposites was investigated with scanning electron microscopy （SEM）; the tensile strength was characterized by tensile testing machine and the thermal stability of composites was studied by thermal gravimetric analysis. Results showed that PMMA chains have successfully grafted onto the surface of SiO2, and the core-shell SiO2-PMMA nanoparticles and NR-PMMA latex have been perfectly incorporated. SiO2-PMMA nanoparticles are evenly distributed over the NR matrix with an average size in the range of 60-100 nm at the low content （SiO2≤ 3 wt%）, while aggregations are apparently observed when 5 wt% SiO2 is loaded. In addition, NP/SiO2 composities possess a considerable improvement in ageing resistance compared with the pure NR. The tensile strength of composite increases from 6.99 to 12.72 MPa, reaching the highest value at a 0.5 wt% SiO2 loading, and then the figure decreases gradually because of the aggregation of SiO2 nanoparticles. It is anticipated that the reported process is to provide a simple and economic way for preparing NR composites.

关键词： natural rubber silica nanocomposite latex compounding rule of similarity

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Structure and Properties of Self-assembled Narural Rubber/Multi-walled Carbon Nanotube Composites

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Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 807-811页

作者：彭政罗勇悦 Chinese Agricultural Ministry Key Laboratory of Tropical Crop Product Processing Agricultural Product Processing Research InstituteChinese Academy of Tropical Agricultural Sciences

Natural rubber （NR）/multi-walled carbon nanotube （MWCNTs） composites were prepared by combining self-assembly and latex compounding *** acid-treated MWCNTs （H2SO4：HNO3=3：1,volume ratio） were self-assembled with poly （diallyldimethylammonium chloride）（PDDA） through electrostatic *** the second assembling,NR/MWCNTs composites were developed by mixing MWCNTs/PDDA solution with NR *** results show that MWCNTs are homogenously distributed throughout the NR matrix as single tube and present a great interfacial adhesion with NR phase when MWCNTs contents are less than 3 wt%.Moreover,the addition of the MWCNTs brings about the remarkable enhancement in tensile strength and crosslink density compared with the NR host,and the data peak at 2 wt% MWCNTs *** more MWCNTs are loaded,aggregations of MWCNTs are gradually generated,and the tensile strength and crosslink both decrease to a certain extent.

关键词： natural rubber (NR) multi-walled carbon nanotube (MWCNTs) composites latex compounding self-assembly

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