Reinforcement of natural rubber latex with silica modified by cerium oxide: preparation and properties
来源期刊：Journal of Rare Earths2016年第2期
论文作者：张福全 廖禄生 王永周 汪月琼 黄红海 李普旺 彭政 曾日中
文章页码：221 - 226
摘 要：Variable masses of nano cerium oxide（CeO<sub>2） were added into nano silica（SiO<sub>2） to prepare the well-dispersed SiO2-CeO2suspension（SiO2-CeO2）, cetyltrimethyl ammonium bromide（CTAB） was used to adjust the compatibility of SiO2-CeO2 with rubber matrix, then SiO2-CeO2 modified by CTAB and curing formulas were mixed with fresh natural rubber（NR） latex to prepare NR/SiO2-CeO2 nanocomposites that contained 0–10 parts of CeO2 by a new emulsion compounding method. The morphologies, cure characteristics, mechanical properties and thermal-oxidative stability of NR/SiO2-CeO2 nanocomposites were investigated. The results revealed that the presence of CeO2 in NR/SiO2-CeO2 nanocomposites was favorable for enhancing the interaction between NR matrix and fillers, helped to get smaller SiO2-CeO2 particles with narrower particle size distribution, further improved the crosslink densities and mechanical properties of NR/SiO2-CeO2 nanocomposites vulcanizates. Meanwhile, the addition of CeO2 increased the active energy at least 4.66%, obviously improved the thermal-oxidative aging-inhibiting properties of NR/SiO2-CeO2 nanocomposites. Additionally, nanocomposites containing CeO2 promoted T g shift to high temperature direction, causing the nanocomposites featured higher tanδ at 0 oC and lower tanδ at 60 oC and exhibited comparable wet grip and lower rolling resistance when NR/SiO2-CeO2 nanocomposites were used in tire tread compound.
张福全1，廖禄生1，王永周1，汪月琼1，黄红海1，李普旺1，彭政1，曾日中2
1. Chinese Agricultural Ministry Key Laboratory of Tropical Crop Product Processing, Agricultural Product Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences2. Agriculture Ministry Key Laboratory of Biology and Genetic Resources of Rubber Tree, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences
摘 要：Variable masses of nano cerium oxide（CeO<sub>2） were added into nano silica（SiO<sub>2） to prepare the well-dispersed SiO2-CeO2suspension（SiO2-CeO2）, cetyltrimethyl ammonium bromide（CTAB） was used to adjust the compatibility of SiO2-CeO2 with rubber matrix, then SiO2-CeO2 modified by CTAB and curing formulas were mixed with fresh natural rubber（NR） latex to prepare NR/SiO2-CeO2 nanocomposites that contained 0–10 parts of CeO2 by a new emulsion compounding method. The morphologies, cure characteristics, mechanical properties and thermal-oxidative stability of NR/SiO2-CeO2 nanocomposites were investigated. The results revealed that the presence of CeO2 in NR/SiO2-CeO2 nanocomposites was favorable for enhancing the interaction between NR matrix and fillers, helped to get smaller SiO2-CeO2 particles with narrower particle size distribution, further improved the crosslink densities and mechanical properties of NR/SiO2-CeO2 nanocomposites vulcanizates. Meanwhile, the addition of CeO2 increased the active energy at least 4.66%, obviously improved the thermal-oxidative aging-inhibiting properties of NR/SiO2-CeO2 nanocomposites. Additionally, nanocomposites containing CeO2 promoted T g shift to high temperature direction, causing the nanocomposites featured higher tanδ at 0 oC and lower tanδ at 60 oC and exhibited comparable wet grip and lower rolling resistance when NR/SiO2-CeO2 nanocomposites were used in tire tread compound.
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