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Preparation of Advanced Materials by Hydrothermal Hot-pressing from Waste Shells

废贝壳水热热压制备先进材料

基本信息

批准号：
14350531
负责人：
YAMASAKI Nakamichi
金额：
$ 9.79万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

It is difficult for waste shellfishes such as pearl oyster shells after pearl culture, oyster shells and scallop shells to be carried into disposal process, therefore waste shells are used a part material without any values for the cement manufacturing. The purpose of this research tries to pay attention to the stiffiening reaction under the hydrothermal condition, to solidify these unused natural calcium carbonate powders, and makes to a strong board molding body at the same time as clarifying the process of the solidification reaction, and to obtain basic information for new establishment from the applied research to the building material etc.When inorganic compounds were mixed with water and pressurized mechanically in the high temperature high-pressure solution system at the temperature below 300℃, the research representatives found the stiffening reaction being caused as well as the sintered compact. Here, it was done to make an advanced molding body by using the hydrothermal stiffening reactions of various shell powders, and to assume a help of the upgrade recycling of unused waste. Especially, preparation of advanced materials with high functions by addition of organic matters was researched.In the case of biomaterials, hydoxyapatite was able to be prepared as development with the living body material by hydrothermal reactions from calcium carbonate powders and solutions with phosphate ions. The dense compact or the porous material could be prepared by the selection of hydrothermal conditions, and a part of samples showed an excellent result by the simulated body fluid examination and the cell culture examination. It was thought that this method of obtaining hydroxypatite materials at the temperature below 300℃ is better in comparison with the current method using high temperature heating such as 900℃ and was able to become a powerful means in the future in the energy cost and the environment.

珍珠养殖后的珍珠贝壳、牡蛎壳、扇贝壳等废弃贝类很难进入处理过程，因此废弃贝壳仅作为部分材料使用，对水泥制造没有任何价值。本研究的目的是试图关注水热条件下的硬化反应，将这些未使用的天然碳酸钙粉末固化，在阐明固化反应过程的同时制成坚固的板成型体，为建筑材料等的应用研究获得新的基础信息。当无机化合物与水混合并在低于温度的高温高压溶液体系中机械加压时 300℃时，研究代表发现烧结体发生硬化反应。在这里，利用各种贝壳粉末的水热硬化反应来制造先进的成型体，并帮助未使用的废物升级回收。特别是，研究了通过添加有机物制备具有高功能的先进材料。在生物材料方面，随着生物体材料的发展，通过碳酸钙粉末和磷酸根离子溶液的水热反应，能够制备羟基磷灰石。通过水热条件的选择，可以制备致密致密或多孔材料，部分样品经模拟体液检查和细胞培养检查显示出优异的结果。人们认为，这种在300℃以下的温度下获得羟基磷灰石材料的方法比目前使用900℃等高温加热的方法更好，并且能够成为未来在能源成本和环境方面的有力手段。