• Proceedings of the Polymer Society of Korea Conference
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• 2006.10a
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• pp.258-258
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• 2006

Electrospun fibers of poly(vinyl alcohol) (PVA) were successfully prepared and applied as drug carriers for transdermal drug delivery system. Sodium Salicylate (SS) was the model drug and it was incorporated in the PVA fibers by adding 20 % of SS in a PVA solution prior to electrospinning. Electrospinning of SS-containing PVA solution resulted in the formation of beaded fibers. In order to control the rate of SS release and decrease water solubility of PVA, the SS-loaded electrospun PVA mat was cross-linked by either glutaraldehyde or glyoxal vapor. The morphology, thermal behavior, swelling behavior, release characteristic, kinetics of drug release and also toxicity of the cross-linked sample were investigated.

• Proceedings of the Korean Fiber Society Conference
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• 2003.04a
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• pp.325-326
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• 2003

유기물질과 무기물질의 복합체 제조는 일찍이 1980년대 초부터 연구되어 오고 있고, 새로운 성능 및 기능 확대를 목표로 계속 이루어지고 있다[1-2]. 폴리비닐알코올(Poly(vinyl alcohol), PVA)은 분리막, 투석, 약물전달, 암세포 괴사용 색전제 등 의료 및 산업용 섬유로 널리 사용되고 있는 비닐계 고분자이다[3,4]. 또한 무기화합물인 Hydroxyapatite(HAp)는 칼슘 포스페이트계 세라믹으로, 중금속 흡착성, 항균성, 생체 친화성 등이 우수하여 의료용 소재로 사용되어 오고 있다. (중략)

• Proceedings of the Korea Concrete Institute Conference
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• 2005.11a
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• pp.679-682
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• 2005

The effects of substituting cement with fiber addition(poly vinyl alcohol), fly ash and Expansive Additive on the control of microcrack and enhanced durability performance of face slab concrete in concrete-faced rockfill dam was studied experimentally The laboratory test results shown that the mixture of fiber containing concrete and of fly ash replacement of concrete to be more effective than expansive additive concrete in the crack control and mechanical performance.

• Proceedings of the Korean Fiber Society Conference
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• 2001.04b
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• pp.103-106
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• 2001

• Polymer(Korea)
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• v.25 no.1
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• pp.115-121
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• 2001

High molecular weight syndiotactic poly(vinyl alcohol)(HMW s-PVA) with number-average degree of polymerization of 10000 and syndiotactic diad content of 61.5%/iodine complex film was prepared. Its adsorption and desorption behaviors of iodine in hot water were investigated. In comparison with atactic PVA film or low molecular weight s-PVA film, the degree of solubility of s-PVA film and the iodine desorption of HMW s-PVA/iodine film in hot water were limited to an extremely lower level. As the soaking time increased, the iodine desorption in hot water was increased. This reason might be explained by the fact that as the soaking time increased, so the iodine adsorption increased not by the stable molecular complex between PVA and iodine but by the simple physical adsorption of iodine.

• Membrane Journal
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• v.23 no.4
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• pp.283-289
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• 2013

Poly(vinyl alcohol) (PVA) coating solution containing glutaraldehyde (GA) and maleic anhydride (MA) as crosslinking agents was coated onto hydrolyzed poly acrylonitrile (PAN) hollow fiber membranes. The permselectivities of the resulting composite membranes prepared varying the reaction temperature and the concentration of the crosslinking agents were tested for 90 wt% ethanol aqueous mixtures by the pervaporation technique at $60^{\circ}C$. In general, the flux decreased while the selectivity increased for the increases of the reaction temperature and the crosslinking concentration. In case of GA as a crosslinking, the flux $165g/m^2hr$ and the separation factor 81 were obtained at GA 11 wt% and the reaction temperature $120^{\circ}C$. And for the case of MA, the flux $174g/m^2hr$ and the separation factor 73 were obtained at MA 11 wt% and the reaction temperature $120^{\circ}C$.

• Journal of The Korean Society of Agricultural Engineers
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• v.54 no.5
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• pp.9-16
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• 2012

In this study, the effect of metakaoline and silica fume on the bond performances of structural polyvinyl alcohol (PVA) fiber in cement mortar, including bond strength, interface toughness, and microstructure analysis are presented. Metakaoline and silica fume contents ranging from 0 % to 15 % are used in the mix proportions. Pullout tests are conducted to measure the bond performance of PVA fiber from cement mortar. Test results showed the incorporation of metakaoline and silica fume can effectively enhance the PVA fiber-cement mortar interfacial properties. Bond strength and interface toughness increased with metakaoline and silica fume content up to 10 % in cement mortar and decreased when the metakaoline and silica fume content reached 15 %. The microstructural observation confirms the findings on the interface bond mechanism drawn from the fiber pullout test results.

• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.478-480
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• 2002

피부란 인체를 외부의 자극으로부터 보호하며 수분의 손실을 막아주는 기능을 수행하는 중요한 장기 중의 하나이다. 피부가 화상이나 각종 외상에 의하여 결손이 일어나게 되면 그 보호작용이 상실되어 기능의 장애를 일으키게 된다. 또한 수분손실에 따른 여러 가지 부작용과 외부로부터의 세균감염 등을 일으켜 환부의 치료를 어렵게 하거나 2차적인 기능장애 또는 손상 등과 같은 추가적인 부작용을 초래하게 된다. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.429-430
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• 2007

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• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.531-532
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• 2007

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