成果報告書詳細
管理番号20140000000130
タイトル*平成25年度中間年報 水素利用技術研究開発事業 燃料電池自動車及び水素ステーション用低コスト機器・システム等に関する研究開発 水素ステーションの高圧水素用ホースとシールシステムに関する研究開発(2)
公開日2015/4/29
報告書年度2013 - 2013
委託先名日本合成化学工業株式会社
プロジェクト番号P13002
部署名新エネルギー部
和文要約
英文要約Research and Development of Technology for Hydrogen Utilization/Research and Development of Low-cost Equipment and System for Fuel CellVehicles and Hydrogen Stations/Research and Development of High-pressure Hydrogen Hose and Sealing System for Hydrogen Stations/ (FY2013-FY2015)
FY2013Annual Report

To utilize the hydrogen for vehicles, flexible high-pressure hose is one of the key components that need to be developed for 82MPa high-pressure hydrogen supply system. Fiber-reinforced nylon11 was expected as a main material for the flexible high-pressure hose. However, we consider nylon11 layer can be damaged by the low physical property because of direct contact of hydrogen under low temperature in the range of 0 degrees C to -40 degrees C. We presume that we can prevent the damage in the hose by the improvement or the displacement of nylon and/or by placing the high hydrogen gas barrier layer at the inner layer of flexible high-pressure hose.Therefore, in 2013 we worked on development of resin that can show good hydrogen resistance when 82MPa high-pressure hydrogen is charged into hose. The main content of the study is summarized as follows.

(1) Improvement of nylon
When various types of nylon were repeatedly exposed to the high-pressure hydrogen gas in the range of 82MPa to 98.4MPa, we confirmed some blister in all sample. We confirmed the blister resistance was slightly improved according to the quantity of amide bond in nylon, and nylon6/66 was superior to nylon11 in respect of hydrogen resistance. And so we conducted the development of polymer alloy that consists of nylon6/66 and soft component in order to make low-temperature characteristic better. As a result, we succeeded in development of new nylon6/66 that was superior to nylon11 in respect of blister resistance and elastic deformation at -40 degree C. But the necessity of further improvement of low-temperature characteristic of new nylon6/66 was recognized because the range of elastic deformation of new nylon6/66 at -40 degrees C was about 10%.

(2)Improvement of gas barrier resin
EVOH have the good gas barrier property, but when conventional EVOH was exposed to the high-pressure hydrogen gas in the range of 82MPa to 98.4MPa, we confirmed some blister in various types of EVOH. In order to control hydrogen diffusion coefficient of EVOH, polymer alloy that consists of EVOH and soft component was developed. Even after this polymer alloy was repeatedly exposed to 82MPa high-pressure hydrogen gas, we did not confirm any appearance changes. EVOH modified by soft component showed cold impact resistance equivalent to nylon 6/66 and nylon11 without detriment to hydrogen gas barrier property.

We are now working on optimization of polymer alloy and proof test of the fiber reinforced resin hose for 82MPa high-pressure hydrogen hose for the next fiscal year.
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