Continuous preparation of the mono-core coating of particle using the spouted bed with draft tube

利用带导流管的喷动床连续制备颗粒单核包衣

• 批准号: 17560663
• 负责人: IJICHI Kazuya
• 金额: $ 2.51万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17560663/
• 关键词: Fine Particle Coating; Surface Modification; Functional Fine Particle; Spouted Bed; Draft-Tube; Mono-core Coating; Titanium Fine Powder; Handling; 超微粒子; チタニア

According as the development of new materials proceeds, the demand of minimization of raw materials and improvement of the surface characteristics of solid particles are raised up. If the mono-core coating of fine particle is achieved, it means that useful fine materials with difficult handling are coated on the seed particle with easy handling. This condition means that the application range extends as functional fine particle, furthermore, it seems to be able to efficiently carry out the addition of the new function in these materials.In this experiment, the preparation of functional fine particle with the environmental cleanup function was tried by coating substrates such as Shirasu particles and glass beads with good handling ability with titanium fine particles which have environmental cleanup function but have strong cohesive property.As a result, by installing Teflon tube with the water repellency to the tip of draft tube, continuous coating operation of 300 minutes would be pos … More sible, due to the choking of the tube was suppressed. Then, regardless of degree of polymerization of PVA and type of the seed particle, it was possible to coat the titanium fine particles at the 90% of the seed particle surface. And the preparation particle was excited by the ultraviolet irradiation by fluorescent lamp, and it was confirmed that there was the activity with the photocatalyst in decoloring the methylene blue which passed in the preparation particle bed. By flowing standard gas of methylene through the fixed bed of the preparation particle, photocatalyst performance of the particles were examined. Due to the binder liquid has covered over the titanium, decomposition reaction in short time could not be observed. Then it was found that selection of the appropriate binder liquid was necessary. By the fluidization test of the preparation particle, it was found that the exfoliation rate of the adhesive titanium fine particle was about 30%. The exfoliation rate was comparatively small, then it was proven that the ability as a photocatalyst of the preparation particle seems to have not been lost. Then the removal operation of the environmental pollutant using fluidized bed operation could be expected. Less

随着新材料的发展，对原材料的最小化和固体颗粒表面特性的改善提出了更高的要求。如果实现了细颗粒的单核包衣，则意味着难以处理的有用细材料以容易处理的方式被包衣在种子颗粒上。该条件意味着作为功能性微粒的应用范围扩大，此外，似乎能够在这些材料中有效地进行新功能的添加。通过用具有环境净化功能的钛细颗粒涂覆具有良好处理能力的基底如Shirasu颗粒和玻璃珠，尝试制备具有环境净化功能的功能性细颗粒结果表明，在导流筒顶端安装具有拒水性的聚四氟乙烯管，可实现300分钟的连续涂装作业， ...更多信息 由于管的阻塞，可接受的，被抑制。然后，无论PVA的聚合度和晶种颗粒的类型如何，都可以在90%的晶种颗粒表面包覆钛微粒。用荧光灯进行紫外光照射激发制备粒子，证实了光催化剂对通过制备粒子床的亚甲基蓝具有脱色活性。通过将亚甲基标准气体通入制备颗粒的固定床，考察了颗粒的光催化性能。由于粘合剂液体已经覆盖在钛上，因此不能观察到短时间内的分解反应。然后发现，选择合适的粘合剂液体是必要的。通过制备颗粒的流化试验，发现粘附性钛细颗粒的剥离率约为30%。剥离率相对较小，则证明制剂颗粒作为光催化剂的能力似乎没有丧失。从而对流化床处理环境污染物的操作进行了展望。少

项目成果

ドラフト管付き噴流層によるシラス微粒子へのチタニアコーティング

使用带有导流管的喷射床在银鱼颗粒上涂覆二氧化钛

• 发表时间: 2006
• 作者: 向井 紳;Shin Mukai;向井 紳;Shin Mukai;Shin Mukai;Y.Uemura et al.;Y.Uemura et al.;Y.Uemura et al.;伊地知 和也
• 通讯作者: 伊地知 和也

Titania coating to shirasu fine particle using the spouted bed with draft tube

使用带导流管的喷射床对 shirasu 细颗粒进行二氧化钛涂层

• 发表时间: 2006
• 作者: K. Ijichi;et. al.
• 通讯作者: et. al.