日本ゼオライト学会 刊行物 Publication of Japan Zeolite Association

ISSN: 0918–7774
一般社団法人日本ゼオライト学会 Japan Zeolite Association
〒162-0801 東京都新宿区山吹町358-5 アカデミーセンター Japan Zeolite Association Academy Center, 358-5 Yamabuki-cho, Shinju-ku, Tokyo 162-0801, Japan
Zeolite 27(1): 2-9 (2010)
doi:10.20731/zeoraito.27.1.2

解説解説

メソポーラスシリカの量産化と調湿材としての応用Mass production and application for humidity conditioning of mesoporous silica

太陽化学株式会社インターフェイスソリューション事業部研究開発グループTaiyo Kagaku Co., Ltd., Interface Solution Division R&D Group ◇ 〒510-0844 三重県四日市市宝町1番3号

受理日:2010年1月21日Accepted: January 21, 2010
発行日:2010年3月10日Published: March 10, 2010
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筆者らは,界面活性剤を構造規定剤とし合成されるメソポーラスシリカ(2D-hexagonal型)について量産化技術を構築し,業界に先駆けて商業化を行った(商品名「TMPS」)。筆者らはシリカの汎用性と安全性に着目し,化粧品から電子部品の低誘電材料にまで応用の可能性を拡げている。本稿では,特に調湿材としての応用に焦点をおいて紹介する。TMPSは狭い湿度域で急激な水の吸放出性を示す。また,細孔径を変じて湿度域を制御することも可能であり,デシカント除湿向けの吸着剤として有望である。筆者らは本用途の課題として,(1)水蒸気耐久性向上,(2)ローター成形を掲げ検討を行った。まずシリカ骨格へ導入する異種金属の種類,量などを最適化した結果,TMPSはアルカリ蒸気を含む水蒸気下での耐久試験後も細孔構造を維持した。次に筆者らはTMPSを配合した抄紙を調製しコルゲート加工に取り組んだ結果,TMPSの細孔閉塞を極少とし抄紙重量当り45%を配合したローターの作製が可能となった。さらに,TMPSを利用した除湿試験機は50°C以下の温風で再生が可能であった。また1年以上のフィールドテストを実施し,優れた除湿性能を維持した。

Taiyo Kagaku has successfully developed a surfactant template assisted mass production technology of mesoporous silica particularly with two-dimensional hexagonal type pore channels and commercializing under a brand name TMPS (Taiyokagaku Meso Porous Silicas). Designed TMPS are with safe and versatile features and thus, recommended to used in variety of diverse applications such as adsorbent, catalysis support, toiletries, materials for electronic industry, for example, low dielectric materials etc. The current report deals with a specific application of TMPS in a humidity control system due to its unique feature to hold and release a substantial quantity of adsorbed matrices (i.e. vapor of water or organic solvents) in desirable range of relative humidity depending on the application. Such features are attributed to its tunable narrow pore size distribution, wherein the humidity control phenomenon could be constantly regulated. TMPS are hydrothermally stable even in humidified ammonia vapors, since we have improved their durability via doping metals in the silica framework. This led us to apply TMPS as adsorbent material for desiccant type air-conditioners. We have successfully established a design of TMPS desiccant rotor with optimized content nearly 45 wt.% of TMPS embedded in thin sheet of papers and corrugated (systematically folded) in to rotor form of desired diameter depending on the scale of desiccant system. Noteworthy to mention that pore blockage problem was dramatically minimized in corrugated TMPS desiccant rotor system, which corresponds to its least occluded mesopores. Fabricated TMPS desiccant units are capable to perform desorption steps under 50 °C. Overall performance were tested under different environmental locations as a field test for more than one year and results revealed that TMPS desiccant constantly maintained an excellent dehumidification performance without any deviations. This clearly implies that TMPS is the promising candidate as an adsorbent for the desiccant type air-conditioning system.

キーワード:メソポーラスシリカ;デシカント;低温再生;水蒸気耐久;コルゲートローター

Key words: mesoporous silica; desiccant; energy-efficient air-conditioning; water vapor endurance; corrugated rotor

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