Development of silica with structured morphology and the reinforcement property as a filler for rubber

开发具有结构化形态和补强性能的二氧化硅作为橡胶填料

• 批准号: 08650803
• 负责人: IHARA Tatsuhiko
• 金额: $ 1.34万
• 依托单位: Kinki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650803/
• 关键词: carbon black; tetraethoxysilane; silica coating; water vapor plasma; reinforcement property for rubber; ゴム補強性

In order to develop the titled material, that is carbon black (Si-CB) having chain-like appearance of CB agglomerates structure with surface property of silica, was prepared by two methods using tetraethoxysilane (TEOS) and carbon black on which hydroxyl groups were introduced by water vapor plasma treatment (Hy-CB), one is wet method based on sol-gel process and the other is dry method called gas phase layer-by-layer adsorption method.In the wet method, Hy-CB reacted with TEOS in an aqueous suspension without addition of catalyst. Silica layer was formed by the dehydration-polymerization reaction followed by the hydrolysis of TEOS.Viscosity data during coating process in the suspension showed the progress of coating with the increase of reaction time, It was found that the surface of the CB was uniformly coated by the silica layer with the thickness of about 1.5 nm.In the dry process, Hy-CB was reacted with TEOS by a gas phase layer-by-layer adsorption method. The process consists of 4 process including 1) gas phase adsorption process of TEOS onto Hy-CB, 2) evacuation process of physically adsorbed TEOS, 3) hydrolysis and activation process by the contact with ammonia vapor, 4) evacuation process of ammonia. It was found that the controlling of the thickness of the silica layer formed on the Hy-CB is possible in a nano-scale by repeating these sequence process.The wet property and wear properly was much improved when these new materials were applied as a reinforcing material for the rubber compared to ordinary one which was prepared by just mixing a silica in it.

为了开发具有炭黑团聚体结构链状外观和二氧化硅表面性质的炭黑（Si-CB）材料，以正硅酸乙酯（TEOS）和经水蒸气等离子体处理引入羟基的炭黑（Hy-CB）为原料，采用两种方法制备了Si-CB材料，一种是基于溶胶-凝胶过程的湿法，另一种是气相层-层吸附法，在湿法中，Hy-CB与TEOS在水悬浮液中反应，不加催化剂。二氧化硅层是由正硅酸乙酯的脱水聚合反应和水解反应形成的，在悬浮液中的粘度数据表明，随着反应时间的增加，二氧化硅层在炭黑表面均匀包覆，厚度约为1.5 nm。通过气相逐层吸附法将Hy-CB与TEOS反应。该工艺由4个过程组成，包括1）TEOS在Hy-CB上的气相吸附过程，2）物理吸附的TEOS的抽空过程，3）通过与氨蒸气接触的水解和活化过程，4）氨的抽空过程。结果表明，通过重复上述过程，可以在纳米尺度上控制在Hy-CB表面形成的SiO2层的厚度，并将其用作橡胶的增强材料，其润湿性和耐磨性比单纯掺入SiO2的普通材料有很大改善。

项目成果

井原辰彦 他: "シリカ被覆カーボンブラックの調製" 色材協会誌. 70. 568-575 (1997)

Tatsuhiko Ihara 等人：“二氧化硅包覆炭黑的制备”《彩色材料协会杂志》70. 568-575 (1997)。

Tatsuhiko Ihara, et al.: "Preparation of Silica-Coated Carbon Black" J.the Japan Society of Color Material. 70, No.9. 568-575 (1997)

Tatsuhiko Ihara 等人：“二氧化硅涂层炭黑的制备”J.日本彩色材料学会。