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김송호(Song Ho Kim),김호찬(Ho-Chan Kim),이인환(In Hwan Lee) 한국기계가공학회 2021 한국기계가공학회지 Vol.20 No.9
Tactile sensors and integrated circuits that detect external stimuli have been developed for use in various industries. Most tactile sensors have been developed using the MEMS(micro electro-mechanical systems) process in which metal electrodes and strain sensors are applied to a silicon substrate. However, tactile sensors made of highly brittle silicon lack flexibility and are prone to damage by external forces. Flexible tactile sensors based on polydimethylsiloxane and using a multi-walled carbon nano-tube mixture as a pressure-sensitive material are currently being developed as an alternative to overcome these limitations. In this study, a manufacturing process of pressure-sensitive materials with low initial electrical resistance is developed and applied to the fabrication of flexible tactile sensors. In addition, flexible tactile sensors are developed with pressure-sensitive materials dispensed on a substrate with flexible mechanical properties. Finally, a study is conducted on the change in electrical resistance of pressure-sensitive materials according to the modulus of elasticity of the substrate.
변상근,윤세훈,김송호,이의수 동국대학교 산업기술연구원 2007 산업기술논문집 Vol.16 No.2
수산화알루미늄과 인산을 반응시켜 수산화알루미늄 인산염을 합성하고 이의 난연 특성을 측정하였다. 수산화알루미늄 인산염은 수산화알루미늄과 인산의 반응에서 다양한 반응 몰 비로 염이 형성될 수 있으며, 염의 구성비에 따라 열분해 현상에 차이가 발생하였다. 수산화알루미늄은 난연 소재의 하나로 이용되고 있고, 인산은 유기물 인산을 형성하여 다양한 유기 인산계 난연 소재로 적용되고 있다. 본 연구 결과에서 수산화알루미늄과 인산의 반응으로 형성된 수산화알루미늄 인산염은 무기물 난연 소재가 가지는 장점뿐만 아니라, 수산화알루미늄 자체의 난연 특성과 인산이 가지는 난연 특성을 공유하는 상승효과를 나타냄을 알 수 있었다. Aluminum hydroxide phosphate was synthesized by means of a salt reaction of aluminum hydroxide and phosphoric acid, thereafter the characteristics of the salt, as a flame retardant, was measured. Various salt compositions were produced in accordance with the mole combinations of two reactants. Aluminum hydroxide is used for a common inorganic flame retardant and phosphoric acid is also used for a part of organic phosphoric compound as an organic flame retardant, respectively. From the result of this study, the aluminum hydroxide phosphate salt has not only the merit of its property of the inorganic compound, but also the synergistic effect of each characters, i.e. flame retardants, in terms of aluminum hydroxide and phosphoric acid.