Unidirectional Pore Formation in Resins Using a Magnetic-Nanoparticle-Chain Template

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2023-04-20 DOI:10.1109/LMAG.2023.3268851

Atsuki Kobayashi;Kohya Sano;Junpei Sakurai;Hosei Nagano;Seiichi Hata;Chiemi Oka

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Abstract

We present a novel manufacturing technique for generating unidirectional pores in ultraviolet (UV)-curable resins using self-assembled magnetic nanoparticles (MNPs) with chain-like structures. The method utilizes two templation mechanisms for pore formation: the UV-masking effect of the MNP chains and the physical presence of MNP chains themselves. Fe ₃ O ₄ nanoparticles and PAK-01 were used as the template and UV-curable resin, respectively. Unidirectional pores formed only when resin/MNP mixtures were cured under a strong externally applied magnetic field. Water absorption tests indicated that some of the unidirectional pores were through-hole-type pores. The pores were cylindrical with an ellipsoidal cross-section. When the UV irradiation angle ( θ ) was 30°, the long and short diameters of the pores were approximately 9 and 8

$\mu$

m, respectively, before MNP removal, and 12 and 8

$\mu$

m, respectively, after removal. After MNP removal, the ellipticity of the pores in the samples increased from 1.5 to 2.4 with the increase in θ because of the increased UV-masking effect of the MNP chains.

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利用磁性纳米粒子链模板在树脂中形成单向孔

我们提出了一种新的制造技术，使用具有链状结构的自组装磁性纳米颗粒（MNP）在紫外线（UV）固化树脂中产生单向孔。该方法利用两种模板形成孔的机制：MNP链的UV掩蔽效应和MNP链本身的物理存在。分别以Fe3O4纳米粒子和PAK-01为模板和紫外光固化树脂。只有当树脂/MNP混合物在强外加磁场下固化时才形成单向孔。吸水性试验表明，部分单向孔隙为通孔型孔隙。孔隙为圆柱形，横截面为椭圆形。当紫外线照射角（θ）为30°时，在去除MNP之前，孔的长径和短径分别约为9和8$\mu$m，在去除之后，孔的短径和长径分别为12和8$\ mu$m。去除MNP后，由于MNP链的紫外线掩蔽效应增加，样品中孔隙的椭圆率随着θ的增加从1.5增加到2.4。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.

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