权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Fabrication of Fine particles and Interaction between the Particles

细颗粒的制造和颗粒之间的相互作用

基本信息

批准号：
10640553
负责人：
FURUSAWA Kunio
金额：
$ 2.5万
依托单位：
University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

In this work, a novel technique, that allows the assembly of different types of colloid particles into ordered multicomponent clusters(suparaparticles) has been investigated. The size and the composition of the superparticle during their assembly are controlled by gathering and confining their components in a restricted, colloid size space. Emulsion droplets are used to provide their restricted apace.The basic principle of the "assembl-and dissolution" scheme used in this study are as follows. The process starts with a suspension of latex or silica microspheres in water. Emulsion drops as the oily phase are introduced after that in the system. The particles could be adsorbed either on the droplet surface or in the their bulk. The obtained ordered shells or balls of densely packed particles are fixed together by an appropriate agent. The carrier emulsion droplets are later dissolved by adding of a mediator phase or solubilizing agent. Thus the final product is supraparticle clusters resuspended in the water phase.One interesting possibility is the fabrication of supraparticles including more than on colloid components. We have assembled composite particles by using both the sulfate and amidine latices or silica and amidine latices by combining their assembly schemes. These composite particles consisted of a core of aggregated amidine microsphers surrounded by the shell of sulfate latices or silica particles. The process first included the formation of ball-like aggregates from the amidine latices inside the octanol droplets. We then used the method for formation of sulfate or silica latex shell on the droplet surfaces.

在这项工作中，一种新的技术，允许组装不同类型的胶体粒子到有序的多组分集群（superaparticles）进行了研究。超粒子在组装过程中的大小和组成是通过将其组分聚集和限制在受限的胶体大小空间中来控制的。乳化液滴被用来提供其有限的空间。本研究中所使用的“组装-溶解”方案的基本原理如下。该方法从乳胶或二氧化硅微球在水中的悬浮液开始。在此之后，将作为油相的乳液滴引入系统中。颗粒既可以吸附在液滴表面，也可以吸附在液滴本体中。通过适当的试剂将所获得的致密颗粒的有序壳或球固定在一起。载体乳液液滴随后通过加入介体相或增溶剂溶解。因此，最终产物是悬浮在水相中的超微粒团簇。一个有趣的可能性是制造包括多于一个胶体组分的超微粒。我们已经组装复合粒子，通过使用硫酸盐和脒胶乳或二氧化硅和脒胶乳通过组合它们的组装方案。这些复合颗粒由聚合的脒微球的核组成，所述核被硫酸盐胶乳或二氧化硅颗粒的壳包围。该过程首先包括从辛醇液滴内的脒胶乳形成球状聚集体。然后，我们使用该方法在液滴表面上形成硫酸盐或二氧化硅胶乳壳。