Preparation of Novel Imogolite-filled Rubber Composite

从玉水花卷风化浮石层土壤中纯化出天然无机聚合物伊莫戈尔石。将纯化后的铁长石填充到丁二烯橡胶（SBR）硫化胶中，并对其补强效果进行了评价。热重分析结果表明，铁长石具有亲水性，易吸收空气中的水分。然后，加入二甘醇（DG），制备了伊莫格里石混合SBR化合物。DG的存在不仅影响了SBR的固化行为，也影响了DG的存在，即固化时间变短，最大扭矩变大。随着伊莫长石填充量的增加，材料的模量、断裂抗拉强度和断裂伸长率均有所提高。但铁莫长石的加固效果要小于高岭土和二氧化硅。它与氢氧化铝相当。imogoolite填充SBR硫化胶的杨氏模量高于氢氧化铝，动态力学分析得到的SBR硫化胶的储存模量也大于高岭土和氢氧化铝。在较低的毁损范围内，伊莫长石的加固效果较高。通过透射电镜观察，伊莫高岭土的粒径约为0.3 ~ 1.5 μ m，这意味着本研究中使用的伊莫高岭土比二氧化硅和高岭土大。因此，伊莫高岭石粉料越多，对橡胶硫化胶的补强效果越好。

Imogolite, which was natural inorganic polymer, was purified from the soil of weathered pumice bed in Hanamaki of Yuwate. The purified imogolite was filled in the stirene-butadiene rubber (SBR) vulcanizates and its reinforcement effect was evaluated. From the results of thermogravimetric analysis of imogolite, imogolite was found to be hydrophylic and was liable to absorb water in air. Then, diethylene glycol (DG) was added for the preparation of the imogolite-mixed SBR compounds. The presence of DG influenced the cure behavior as well as DG for silica-mixed SBR compound, i.e., the curing time became shorter and the maximum of the torque became larger than those of the system without DG.The increase of the amount of the filled imogolite brought to the increase of the modulus, tensile strength at break and elongation at break. However, the degree of reinforcement effect of imogolite was smaller than those of Kaolin clay and silica. It was comparable with that of aluminum hydroxide. Young modulus of the imogolite-filled SBR vulcanizate was higher than that of aluminum hydroxide, and the storage modulus obtained from the dynamic mechanical analysis of the imogolite-filled SBR vulcanizate was also larger than those of Kaolin clay and aluminum hydroxide. At low defamation range, the reinforcement effect of imogolite is concluded to be high. Form the transmission electron microscopy observation, the particle size of imogolite was observed to be about 0.3 mum - 1.5 mum, which means that imogolite used in this study was larger than those of silica and Kaolin clay. Therefore, the much more powdering of imogolite should bring to the more excellent reinforcement effect for the rubber vulcanizate.