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Viscose process에 의한 Cellulose sponge의 제조와 물성 측정
김용욱,한상윤 慶熙大學校 1991 論文集 Vol.20 No.-
본 연구는 셀룰로오스 스폰지를 제조하기 위한 종래의 방법과 장치들을 개량하여 스폰지의 물성들을 보다 향상시켰다. 비스코스 공정에 의한 제조방법으로 α―셀룰로오스를 알칼리화 한 후 이황화탄소를 혼합하여 황화반응을 시킨 뒤, 물에 녹아서 기공을 형성할 수 있는 결정망초와 함께 응고시킨 후 세척하여 제품화하였다. 이러한 공정으로 제조된 스폰지는 수분흡수율이나 인창강도 등의 물성이 종래의 제품이나 기타 합성수지에 의해 제조된 제품보다 우수하였으며 경제성에 있어서도 우수함을 알 수 있었다. This study related generally to an improved method for the production of sponge masses, and it relates more particularly to an improved method for cellulose sponge of improved physical properties. In accordance with the method of producing cellulose sponge by viscose process high a alpha cellulose is alkalized in the well known manner, admixed without aging with carbon disulfide to produce cellulose xanthate. The viscose is admixed with a water soluble pore-forming substance such as crystal sodium sulfate, and the resulting mass is treating to coagulate the viscose. The process of producing by the viscose method, the sponge to characterized by their greater absorbency, absence of large voids and superior strength the other physical characteristies and by their lower cost.
金容旭,趙駿衡 동국대학교 산업기술환경대학원 1996 산업기술논총 Vol.3 No.-
The objective of this study was to find information about the possible use of the by-products decomposed from food wastes as agricultural resources. Food wastes were well decomposed at the condition of 40℃ temperature and 50% moisture content. The decomposition rate was decreased when the moisture contentment was below 40% and above 50%, respectively. The condition above 50% moisture content had a bad odor due to anaerobic fermentation. Fruit wastes was not well decomposed but the decomposition rate was 98.8% in cereals and 99.2% in meats, respectively. The mixing treatment with food wastes and wood bark showed superior result in decomposition rate to rice hull. The amount of heavy metals of the by-products of food wastes were lower than available standard value. The high electric conductivity would be due to the high amount of sale added during cooking. Therefore, further study on accmulation of sale concentration would be required for available use of food wastes as agricultural compost resources.