Simultaneous Synthesis and Dispersion of Ultra-fine Particles with the Use of Surfactant Having the Function of Nano-scale Surface Biomechanism

具有纳米级表面生物机制功能的表面活性剂同时合成和分散超细颗粒

• 批准号: 13450313
• 负责人: KAMIYA Hidehiro
• 金额: $ 9.41万
• 依托单位: Tokyo University Agriculture And Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450313/
• 关键词: Nano-particle Dispersion; Nano-pool Structure; Sol-gel Method; Barium Titanate; Aggregation-dispersion Control; Colloid Probe AFM; Sedimentation Control; Nano-particle Homogenization

In order to uniformly disperse ultra-fine particles simultaneously with synthesizing processes, a new aqueous surfactant with a high hydrophilic group density and special cis-structure was prepared from a microbial product and added to reactant solution. Barium titanate size of sol-gel synthesis was tested and the addition of the surfactant made it possible to decrease the the aggregates in suspension as well as the sedimentation velocity while maintaining the stoichiometric composition. The optimum additive content to obtain the minimum aggregate size of about 100-200nm in diameter and the highest dispersion stability in suspension while maintaining the stoichiometric composition of prepared ultra-fine BaTiO_3 particles without other phases was determined at about 7.1wt%. Because the excess addition of this surfactant at more than 8.5wt% inhibited the uniform synthesis of BaTiO_3 particles, an amorphous phase with a highly specific surface a and a BaCO_3 phase formed in the synthesize … More d particles. An acrylic oligomer surfactant, which had a similar molecular weight and similar high density in hydrophilic carboxyl groups to the microbial-derived surfactant was also tested and BaTiO_3 nano-particles with a high dispersion stability in suspension can be prepared. The same microbial derived surfactant was applied also to the synthesis of CaCO_3 and hematite and particles with several nanometers in diameter with less sedimentation characteristics were produced. The mechanism of anionic polymer dispersants in dense ceramics powder suspension, such asn Si_3N_4, Sic, TiC was investigated by atomic force microscopy (AFM) with the aid of newly prepared colloidal probes. Copolymer of ammonium acrylate and methyl acrylate with different hydrophilic to hydrophobic group ratios, m : n, was prepared and added to the suspension. Microscopic surface interaction between a particle and a plate made of porous sinters of the particles in surfactant solution was characterized by using colloidal probe AFM. The relationships between macroscopic suspension viscosity and the microscopic surface interaction were analyzed. Based on these results, the adsorption mechanisms of polymer dispersant on ceramic powders and hetero-coagulation phenomena in suspension were discussed. Less

为了在合成过程中同时均匀分散超细粒子，从一种微生物产物中制备了一种具有高亲水基团密度和特殊顺式结构的新型水基表面活性剂，并将其添加到反应物溶液中。对溶胶-凝胶法合成钛酸钡的粒度进行了测试，表面活性剂的加入可以在保持化学计量比不变的情况下，降低悬浮液中的聚集体和沉降速度。确定了在保持不含其他相的超细BaTiO_3颗粒化学计量比的前提下，获得最小粒径约为100~200 nm的团聚体和在悬浮液中获得最高分散稳定性的最佳添加剂含量为7.1wt%左右。由于该表面活性剂的过量加入量超过8.5wt%，抑制了BaTiO_3颗粒的均匀合成，在合成的…中形成了具有高比表面a的无定形相和BaCO_3相更多的d粒子。还测试了一种与微生物衍生表面活性剂具有相似分子质量和高密度亲水羧基的丙烯酸酯齐聚表面活性剂，并可制备在悬浮液中具有高分散稳定性的纳米BaTiO_3。同样的微生物衍生表面活性剂也应用于CaCO3和赤铁矿的合成，得到了直径数纳米、沉降性较小的颗粒。用原子力显微镜(AFM)研究了阴离子聚合物分散剂在致密陶瓷粉末悬浮液中的分散机理。制备了不同亲水疏水比(m：n)的丙烯酸铵-丙烯酸甲酯共聚物，并将其添加到悬浮液中。用胶体探针原子力显微镜研究了表面活性剂溶液中颗粒与多孔烧结体之间的微观表面相互作用。分析了宏观悬浮液粘度与微观表面相互作用的关系。在此基础上，对聚合物分散剂在陶瓷粉末上的吸附机理和悬浮液中的混凝现象进行了探讨。较少

项目成果

H.Kamiya, S.Matsuim T.Kakui: "Analysis of Action Mechanism of Anionic Polymer Dispersant with Different Molecular Structure in Dense Silicon Nitride Suspension by Using Colloidal Probe AFM"Ceramics Transaction. 152. 83-92 (2004)

H.Kamiya、S.Matsuim T.Kakui：“利用胶体探针 AFM 分析不同分子结构阴离子聚合物分散剂在致密氮化硅悬浮液中的作用机制”《陶瓷交易》。

五味健二郎, 田中謙次, 神谷秀博: "チタン酸バリウム微粒子の超高圧CIP成形"日本セラミックス協会学術論文誌. 111巻(掲載決定). (2003)

五味健二郎、田中健二、神谷秀宏：“钛酸钡微粒的超高压CIP成型”日本陶瓷学会杂志第111卷（2003年出版）。

H.Kamiya, M.Naito: "Characterization of surface structure and interaction between particles, in "Synthesis, Functionalization and Surface Treatment of Nanoparticles""American Scientific Publishers. 302(257-278) (2003)

H.Kamiya、M.Naito：“表面结构的表征和颗粒之间的相互作用，载于“纳米颗粒的合成、功能化和表面处理””美国科学出版社。

H.Kamiya, S.Matsui, T.Kakui: "Analysis of Action Mechanism of Anionic Polymer Dispersant with Different Molecular Structure in Dense Silicon Nitride Suspension by Using Colloidal Probe"Ceramics Transaction. 152. 83-92 (2004)

H.Kamiya、S.Matsui、T.Kakui：“利用胶体探针分析不同分子结构阴离子聚合物分散剂在致密氮化硅悬浮液中的作用机制”《陶瓷交易》。

T.Kakui, H.Kamiya: "Effect of Polymer Dispersant Molecular Structure on Dense Ceramics Suspension Behavior in Nonaqueous System"Ceramic Trans.. (in Press). (2004)

T.Kakui、H.Kamiya：“聚合物分散剂分子结构对非水体系中致密陶瓷悬浮行为的影响”Ceramic Trans..（出版中）。