10/7(一)專題演講公告

演講人藤川茂紀   教授

服務單位日本九大學碳中和能源研究所

演講題目Large and free-standing nanomembranes for CO2 capture

演講時間108107(星期一)早上1020

演講地點工綜館203國際演講廳

個人學歷

日本九州大學 / 工學博士

日本九州大學 / 工學碩士

日本九州大學 / 工學學士

個人經歷

日本九州大學 / 副教授 (現職)

日本東京工業大學 / 研究員

日本東京工業大學 / 兼任副教授

日本奈米膜技術有限公司 / 合夥人兼董事會成員

日本理化學研究所 / 實驗室副主任

日本理化學研究所 / 博士後特聘研究員

演講摘要

Biological lipid bilayer membrane is an ideal example for precise and efficient molecular separation. One of its characteristics is free-standing property with molecular thickness, and molecular scale phenomena become dominant in the direction of the membrane thickness. Thus, artificial membrane with a free standing properties and nanometer thickness would be a unique property different from conventional membrane. Based on this idea, we have developed functional free-standing nanomembranes with a centimeter-scale of lateral size. These membranes are manipulable macroscopically, event its thickness is a few tens nanometers.

We have succeeded to prepare free-standing and ultrathin membranes with precise molecular filtration ability by designing nanochannels structures across a membrane. Our next target is to separate further small molecules, including CO2 and gaseous molecules, because membrane separation of CO2 is one of promising CO2 capture technologies. In this scope, we have developed membranes composed of polymer and inorganic materials.

In polymeric nanomembranes, we have investigated cross linkable materials, such as an epoxy resin, urea and melamine derivatives, for the preparation of nanomembrane. In all case, we have succeeded to prepare free-standing membrane with a few tens nanometer thick, and the gas permeance of each membrane was investigated.

In inorganic membrane, we employed the composite materials composed of titanium alkoxide carboxylic derivatives, such as phthalic acid, to control the gas selectivity of the membrane. Based on a spin-coating process, titania composite membrane with the thickness of 100 nm or less was prepared on a PDMS support. Some composite membrane, show preferential CO2 permeation over nitrogen.

In membrane separation, the thickness plays an important role for the efficient separation. Further thinning of membrane close to the thickness of a biological lipid membrane is our challenge to create ideal membrane separation.

20191007-1