液中の粉の性質

同志社大学　理工学部　化学システム創成工学科　教授　石田 尚之　氏

液中での粉のふるまいには、気体中とはまた違う「クセ」があり、それを理解しなければ上手くハンドリングすることはできません。液中での粉のふるまいの基本である「分散・凝集」と「粒子間力」を中心に、何が液中の粉体の性質を支配し、どうしたらそれを制御できるのか、基礎からわかりやすく説明します。

開会挨拶

海外交流委員会　副委員長　國枝 純　氏

Smart powder processing for developing advanced Metal Matrix Composites
微細構造制御法を用いて新素材を添加した高性能複合金属材料の開発

State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University
（上海交通大学） Associate Professor Zhanqiu Tan, Professor Di Zhang

Metal matrix composites (MMCs) are featured of high mechanical performances and functional properties, but the low ductility and toughness seriously restricts its development and engineering applications. How to regulate the microstructures to improve their plasticity has been a great challenge. Inspired by the high toughness of the brick-mortar microstructure from natural nacre, we developed a powder assembly and elemental alloying preparation technology for fabricating carbon nanotubes, graphene reinforced high strength aluminum alloy composites. The exquisite nano-laminated, hetero-laminated and multi-modal grained microstructures can be tailored in the MMCs, which enhance their Yong’s modulus by 20% (over 83 GPa), with tensile strength up to 700MPa while tensile elongation more than 8%. The contribution and strengthening mechanisms from the brick-mortar microstructure, carbon-aluminum interfaces, and the hetero-interfaces between coarse grains and fine grains are discussed, which will promote the development of high strength and ductile MMCs.

ビーズミルを用いたコンタミレスナノ粉砕技術 XEROGRIN®の開発

塩野義製薬（株） 製薬技術研究本部　製剤研究所　サブグループ長　田中 宏典　氏

難溶解性薬物の吸収改善を目的としたナノ結晶粒子の製造法としてビーズミル法が挙げられるが、プロセス由来の金属コンタミネーションの発生が技術開発上の課題であった。本課題に対して、ソフト面およびハード面の両面からアプローチすることで、先行技術を凌駕した実用性の高いコンタミレスナノ粉砕技術を見出した。

Nanoparticle Design for Energy,
Environmental and Health Applications
環境、エネルギー、健康に貢献するナノ粒子材料開発

University of Cologne in Germany Professor Sanjay Mathur

In the dynamic landscape of materials science, nanoparticle design remains a pivotal frontier to enhance the functional performance of specific materials and also to enhance the materials economy for target applications. Nanostructured ceramics and pigments play a key role as advanced photon harvesters, electrode materials in batteries and as electrocatalysts in energy conversion processes. In addition, conjugation of functional groups on the surface of nanoparticles enables immobilization of biocatalysts such as enzymes to degrade microplastics thereby improving the human environment. Moreover, development of biocompatible nanocarriers that can transport anti-tumor drugs in the body represent a major step in the future of precision medicine. For any systemically administered drug, the transport to the site of interest is inhibited by various physiological barriers, which reduces or even blocks the therapeutic efficiency of molecular drugs. Therefore, advanced drug-delivery systems are needed to overcome biological barriers. In this context, hollow silica nanoparticles functionalized with receptor-targeting ligands are promising drug-carriers to transport higher amounts of therapeutic payloads and to reduce any undesired off-site effects. Moreover, hollow nanoparticles can incorporate more than one drug enabling theranostic and theraregenerative approaches.
This talk will discuss the potential benefits of nanoparticle design towards energy conversion processes, precision drug delivery and recent developments in engineered living materials.

閉会挨拶

海外交流委員会　副委員長　國枝 純　氏

「粒度と粒子径／粒子径と粒子径分布／平均径／分布の表示法／粒子径計測の諸原理」などを紹介

創価大学　理工学部　教授　松山 達　氏

粉体を取り扱う業務で粒子径分布の情報は欠かすことができません。しかし一方、そのための測定原理が多種類あったり、分布についての統計的取り扱いが必要になったりして、入口はそれなりにハードルが高かったりします。このセミナーではこの入口の門から「一歩入る」あたりを目指します。