• 국제초고층학회논문집
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• 제2권4호
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• pp.345-354
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• 2013

This paper presents an advanced engineering technique using finite element analysis to improve structural silicone glazing (SSG) design in high-performance curtain wall systems for building facade. High wind pressures often result in bulky SSG aluminum extrusion profile dimensions. Architectural desire for aesthetically slender curtain wall sight-lines and reduction in aluminum usage led to optimization of structural silicone bite geometry for improved stress distribution through use of finite element analysis of the hyperelastic silicone models. This advanced design technique compared to traditional SSG design highlights differences in stress distribution contours in the silicone sealant. Simplified structural engineering per the traditional SSG design method lacks accurate forecasting of material and stress optimization, as shown in the advanced analysis and design. Full scale physical specimens were tested to verify design capacity in addition to correlate physical test results with the theoretical simulation to provide confidence of the model. This design technique will introduce significant engineering advancement to the curtain wall industry and building facade.

• Archives of Plastic Surgery
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• 제50권2호
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• pp.220-221
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• 2023

Microsurgical peripheral nerve repair is a technical and challenging procedure that requires thorough training prior to a real-life operating theater scenario. While the gold standard in training remains training on biological living peripheral nerve specimen, various inanimate models of nerve repair simulation have been described in the past years. The textile elastic band (TEB) obtained from a surgical mask was either covered with a fine silicone sheath or was left bare and was used afterward for end-to-end coaptation. The average diameter of the TEB was 2 mm, similar with the nerves in the distal hand and can be easily crafted out of accessiblematerials such as a surgicalmask and silicone sealant. The silicone that covers the TEB offers more fidelity to the simulation for microsurgical nerve coaptation. The TEB model offers an affordable, available, and easy-to-craft alternative to the existing models for peripheral nerve repair simulation and serves as a good initiation tool before moving on to biological specimens.

• 폴리머
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• 제31권1호
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• pp.86-91
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• 2007

Polydimethylsiloxane prepolymer와 2-hydroxyethyl methacrylate (HEMA)를 이용하여 Polydimethylsiloxane을 도입한 HEMA(SH)를 제조하였다. 여기에 methacrylic acid (MA), allyl glycidyl ether(AGE) 및 aminopropyltrimethoxysilane (APTS)를 이용하여 실록산 변성 polyacrylate hybrid(SMPA)를 제조하고 이들의 구조를 FTIR 및 $^1H-NMR$로 확인하였다. SMPA에 대한 내열특성을 TGA를 통해 측정한 결과 $400^{\circ}C$에서 무게 잔존율($W_{tr}$, %)은 APTS의 함량이 증가할수록 55에서 63%로 증가하여 나타났다. 제조한 SMPA에 증점제, 가교제 등의 각종 첨가제들을 가하여 SMPA 실란트를 제조하였다. 접착특성을 측정한 결과 SMPA-3를 이용하여 제조한 실란트의 경우 concrete와 금속사이의 최대 하중 신장률은 2.01%. 파괴 하중 신장률은 2.28%로 SMPA-1 및 SMPA-2를 이용하여 제조한 실란트의 1.07, 1.45%와 1.02, 1.35%인 경우보다 증가되었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.170-172
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• 2013

To be applied to a humid environment such as bathroom and kitchen, sealant should have good adhesion, tensile strength, etc., it also have the resistance to fungal contamination from the environment. It is important to select right material for sanitary sealing application in order to prevent premature discoloration and fungal activities. Especially for high humidity conditions, it is crucial to have longer mildew and fungal resistance. In this article, we intended to give guide lines for developing right sanitary sealing material and practical test method for evaluating anti-fungal performances reflecting Korean residential life style.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.173-174
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• 2013

In this study, the tensile properties of sealants by heat deterioration were measured and analysed to gather the basic data of sealant because these studies do not have been investigated in Korea. Most general one-component silicone sealants were used and test specimen was I-type. The test parameters are sealant types which have different density and heat deterioration time in 80℃. As a result, the rat of reduction in area by heat deterioration was considerable increased at SR-A compared with SR-B. The tensile properties by heat deterioration decreased at SR-A because the specimen by deterioration occurred adhesive failure before tensile test. However, SR-B specimen was increased at maximum tensile stress but decreased at elongation in maximum tensile stress. Also, Maximum principal stress was measured at the edge of specimen by FEM simulation in order to find out failure points.

• 한국환경보건학회지
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• 제32권4호
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• pp.373-380
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• 2006

The photocatalytic reactor using immobilized $TiO_2$ on silicone sealant was studied bench scale using solar light as the source of radiation. The influences of parameters such as shape, polishing extent and size of reflector, distance between reactor and reflector, an angle of inclination between reactor system and ground, were studies using Rhodamine B (RhB) as a model compound. respectively. The decolorization of round type among the reflector shapes was higher than that of the polygon and W type. The polishing extent of the reflector did not show the decolorization largely. The optimum size of reflector and distance between reactor and reflector were 38 cm and 6 cm, respectively.

• 한국건축시공학회지
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• 제24권1호
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• pp.43-53
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• 2024

본 연구에서는 실리콘 실란트 총 6종을 제작하여 곰팡이 저항성 시험 방법인 ASTM G 21, LH 전문 시방(LHCS 41 40 12) 시험과 신규 제정된 KS F ISO 21265 시험법에 따라 곰팡이 저항성을 평가하였다. 그 결과, KS F ISO 21265 시험법이 ASTM G 21과 LH 전문 시방(LHCS 41 40 12) 시험법에 비해 곰팡이 저항성 평가에 대한 변별성이 더 큰 것으로 판단되었으며, 알콕시 경화형 실란트에 비해 옥심 경화형 실란트의 곰팡이 저항성이 더 큼을 확인하였다. 또한, KS F ISO 21265 시험법에서는 50℃에서 4주간 침수 후 곰팡이 저항성을 평가하는 조건 도입을 통해 실란트의 장기적인 곰팡이 저항성 평가가 가능할 것으로 판단된다.

• 한국환경보건학회지
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• 제31권5호
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• pp.415-422
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• 2005

The photocatalytic decolorization of Reactive Red 2B(RR2B) was studied using immobilized photocatalyst/UV System. Two pairs of 20 W UV-B and UV-C lamps were employed as the light source. Immobilization of $TiO_2$ was carried out using sponge (as the photocatalyst body) and silicone sealant(as the binder). The effects of parameters such as the thickness, pore size of sponge photocatalyst and attached material on the reactor bottom were investigated. The results showed that the optimum thickness of sponge photocatalyst was 1 cm. Decolorization of reactor which had the bottom coated $TiO_2$ was higher than that of reactor attached aluminum plate. Decolorization of photocatalyst with large pore size(mean pore size, 3.8 mm) was higher than that of the small(mean pore size, 1.75 mm). Initial decolorization of RR2B could be descrived using the Langmuir-Hinshelwood(L-H) model and gave constant values of $0.55mg/l{\cdot}min(k)\;and\;2.65{\times}10^{-2}l/mg(K)$, respectively.

• 한국환경과학회지
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• 제13권10호
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• pp.921-928
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• 2004

The photocatalytic decolorization of Rhodamine B (RhB) was studied using immobilized $TiO_2$ and fluidized bed reactor. Immobilized $TiO_2$(length: 1$\~$2 mm, width: 1$\~$3 mm, thickness: 0.5$\~$2 mm) onto silicone sealant was employed as the photocatalyst and a 30 W germicidal lamp was used as the light source and the reactor volume was 4.8 L. The effects of parameters such as the amounts of photocatalyst, initial concentration, initial pH, superficial velocity, $H_2O_2$ and anion additives. ($NO_3^{-},\;SO_4^{2-},\;Cl^{-},\;CO_3^{2-}$) The results showed that the optimum dosage of the immobilized $TiO_2$ were 87.0 g/L. Initial removal rate of RhB of the immobilized $TiO_2$ was 1.5 times higher than that of the powder $TiO_2$ because of the adsorption onto the surface of immobilized $TiO_2$ In the conditions of acidic pH, initial reaction rate was increased slowly and reaction time was shorted. The effect of anion type on the reaction rate was not much.