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오상연;박근후;류동일;최창남;양갑승;박원호;오영세
- Proceedings of the Korean Fiber Society Conference
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- 1998.04a
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- pp.315-319
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- 1998
셀룰로오스 용매계는 크게 직접용매계와 간접용매계로 나뉠 수 있으며, 잘 알려진 "비스코스 레이온(viscose rayon)"공정은 공정 중간단계에 이황화탄소(CS$_2$)를 사용하여 셀룰로오스 크산테이트 유도체를 만들고 이를 다시 수산화나트륨에 용해시키는 간접용매계에 속한다. 수산화나트륨 수용액에 용해된 비스코스 용액은 응고 욕내에서 황산과 반응하여 셀룰로오스로 재생이 되는데 비스코스 용액의 재생과정에서 발생하는 이황화탄소는 그 자체가 독성이 심한 가연성 액체일 뿐만 아니라 부반응을 통하여 삼황화소다(sodium trithiocarbonate) 및 황화수소(H$_2$S)를 발생한다.(중략)
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Byeon, Hong-Ju;Choi, Won-Seok;Lee, Hyang-Yeol
- Journal of the Korean Applied Science and Technology
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- v.35 no.3
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- pp.702-708
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- 2018
Hydrogels are natural polymer networks that can contain huge quantities of water and many cosmetical ingredients. Their hydrophilic functional groups creates a matrix, which allows high efficacy in delivering active ingredients into the skin. In industry, hydrating properties and strength of the hydrogels are of great interest in manufacturing hydrogel mask packs. We have used the cellulose in various forms such as powder, cotton fiber and cellulase treated cotton fiber to investigate the property changes of cellulose/hydrogel sheets. When 0.1% and 0.3% of cellulose powder were added to hydrogels, tensile strength of hydrogel sheets were decreased by 10% and 14% respectively. Vise versa, when 0.5 ~ 2 cm of cotton fibers were added, tensile strength of hydrogel sheets were significantly increased by about 20%. The hydrogels which contain cotton fibers also gave an excellent moisturizing effect. Especially cellolose/hydrogels containing cellulase-treated cotton fibers showed the best effect on retaining moisture content increasing upto 380% in comparison with the one containing untreated cotton as well as excellent dispersibility.
https://doi.org/10.12925/jkocs.2018.35.3.702 인용 PDF KSCI