Structure Control of Polymeric Materials using Magnetic Fields

利用磁场控制聚合物材料的结构

• 批准号: 15085207
• 负责人: KIMURA Tsunehisa
• 金额: $ 24.96万
• 依托单位: Tokyo Metropolitan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15085207/
• 关键词: Structures and properties of polymer; Magnetism; Nano materials; Composite; Micro-gravity; Magnetic alignment; 複合材料・物性; 結晶成長; 自己組織化; 光物性

In this project, we focused on (1) mechanism of magnetic alignment, (2) fabrication of new materials using magneticfield, (3) novel methods of magnetic alignment.Re (1), magnetic alignment of microphase structure of block copolymers was studied. It was found that a cylinder and lamella structures align under magnetic fields. Various possible mechanisms were examined to finally conclude that it is most possible that shape anisotropy is a main factor for the magnetic alignment. Polypropylene underwent magnetic alignment when it was crystallized under supercritical carbon dioxide.Re (2), Polypropylene formed a well-aligned transparent film when treated with nucleating agents under a magnetic field. Also, a liquid crystalline block copolymer exhibited a transparent and well-aligned film. These two cases indicate that the trade-off of transparency and alignment in magnetically aligned films has been overcome in the present research.Re (3), we have succeeded in the 3-dimensional alignment of biaxial crystals using a special dynamic magnetic field. Amplitude or frequency modulated magnetic field was used to achieve the 3-D precise alignment of crystallites suspended in a liquid medium. This novel technique provides an innovative method to fabricate a pseudo-single crystal from powder.

在本项目中，我们重点研究了(1)磁取向的机理，(2)利用磁场制备新材料，(3)新的磁取向方法。RE(1)，研究了嵌段共聚物的微相结构的磁取向。发现在磁场作用下，圆柱体和片层结构排列成一条直线。研究了各种可能的机制，最终得出结论：形状各向异性最有可能是影响磁取向的主要因素。当聚丙烯在超临界二氧化碳中结晶时，它发生了磁取向。Re(2)，在磁场作用下，成核剂处理后，聚丙烯形成了一种排列良好的透明薄膜。此外，液晶嵌段共聚物显示出透明且排列良好的薄膜。这两个例子表明，本研究克服了磁取向薄膜的透明度和取向之间的权衡。Re(3)，我们成功地利用一个特殊的动态磁场实现了双轴晶体的三维取向。利用调幅或调频磁场实现了悬浮在液体介质中的微晶的三维精确取向。这一新技术为从粉末制备假单晶提供了一种创新的方法。

项目成果

Role of amorphous region on the deformation behavior of crystalline polymers.

非晶区对结晶聚合物变形行为的作用。

• 期刊: Polym. J. (in print)
• 作者: Murakami.A;et al.;K. Nakayama;K. Ito;T. Tateishi;Hiroshi Wada;M.Fukuoka
• 通讯作者: M.Fukuoka

Magnetic Alignment and Crystallization Behavior of lsotactic Polystyrene

等规聚苯乙烯的磁排列和结晶行为

• 发表时间: 2005
• 作者: M.Yamato;T.Kimura;in "Materials Processing In Magnetic Fields";Ed.H.Wada;H.J.Schneider-Muntau;分担執筆
• 通讯作者: 分担執筆

磁場を用いたセルロースの構造制御

利用磁场控制纤维素的结构

• 发表时间: 2005
• 期刊: Cellulose Commun. 54(11)
• 作者: N.Kitamura;S. Unzai;H.Inaba;木村恒久
• 通讯作者: 木村恒久

Alignment and orientation of non-magnetic materials by weak magnetic fields

通过弱磁场对非磁性材料进行排列和定向

• 发表时间: 2006
• 期刊: Kinouzairyo(in Japanese) 26(4)
• 作者: T.Kimura

T.Kimura: "Study on the Effect of Magnetic Fields on Polymeric Materials and Its Application"Polymer J.. 35(11). 823-843 (2003)

T.Kimura：“磁场对高分子材料影响的研究及其应用”Polymer J.. 35(11)。