http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
곽보민,권영환,신영은 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Inorganic-organic hybrid materials are a new type of composite material in which the inorganic and the organic components are combined at the molecular level There has been much research on the application of these hybrid materials as functional coatings on glass and polymer substrates. Silica particle(H25)/vinytriethoxysilane(VTES) hybrid materials were prepared. We compared the thermal conductivity and mechanical properties of the heat-insulated composite materials. When the surface of silica particles was compared with that of VTES before and after the modification, it was confirmed that the mechanical properties of the composite after the modification were increased. The organic functional groups of silica surfaces lead to an increase of the adhesion at interfaces between silicas and the rubber matrix. It can be concluded that silane coupling agents of silicas can be utilized to develop more selective and effective fillers for organic rubber matrices in a compounding system.
곽보민,권영환,박순영 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
다공성 고분자 복합체는 가볍고 우수한 단열, 높은 에너지 / 흡음 능력, 낮은 열전도도 및 큰 압축 변형률 등의 특성으로 널리 사용된다. 본 연구에서는 유리입자로 이루어진 무기물 다공성 입자와 탄화수소로 이루어진 유기물 다공성 입자를 사용하여 다공성 단열 복합체의 열 및 기계적 특성을 연구한다. UV경화를 이용하여 단일 벌크 중합을 하여 단열 복합재를 제조하였다. Aliphatic urethane diacrylate oligomer (EBECRY®210), tetrahydrofurfuryl acrylate monomer, di(trimethylolpropane) tertraacrylate crosslinker, phenyl bis(2,4,6-trimethylbenzoyl) phosphine oxide photoinitiato로 모재(base material)를 만든 후 다공성 입자를 첨가하였다. 혼합 후 혼합물을 실리콘 몰드 틀에 캐스트를 하고 5분간 250mW /cm2의 광도로 조사하여 시료를 제조하였다. UV경화된 단열 복합체의 열전도율에 대한 비교 연구를 하였으며, 이때 단열 복합재의열전도도는 THB 방법으로 측정하였다. 다공성 단열 복합재의 인장 및 압축 시험을 통한 기계적 물성도 평가하였다.
곽보민,신영은,권영환 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Recently, great attention has been paid to the use of carbon materials for increasing thermal conductivity of polymer due to their unique nanostructures, high aspect ratio and superior thermal conductivity. Although fillers have a positive effect on polymer matrices, their nanoscale dimensions, and high surface areas make them difficult to disperse into the matrix. Silane coupling agent is a commonly used surface treatment agent. Grafting silane molecules onto fillers surface improve dispersion of the fillers in matrix, thereby improving the interfacial interactions. These improved interfacial interactions result in an enhancement of thermal and mechanical properties. This study was conducted to study the thermal conductivity of poly (dimethyl siloxane) composites filled with carbon fillers, including graphite and expanded graphite (EG), and to improve the mechanical properties of composites using silane coupling agents.
곽보민,최부철,서민영,정수란,권영환 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Great attention has been paid on the use of carbon materials for increasing thermal conductivity of polymers due to their unique nanostructures, high aspect ratio and superior thermal conductivity. Graphene has been recognized as one of the best carbon materials for this purpose due to its excellent thermal conductivity. This study is to investigate the effect of graphene filler on the thermal conductivity and mechanical properties of silicone/graphene composite. The silicone/graphene composites with the mass fraction in the range of 0.1% ~ 1% of graphene fillers were prepared by bulk mixing method. In addition, surface-modified graphene fillers were also used to examine the effect of dispersion of graphene fillers on the thermal conductivity.
곽보민,권영환 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
유리입자로 이루어진 무기물 다공성 입자와 탄화수소로 이루어진 유기물 다공성 입자를 사용하여 UV경화를 통한 단일 벌크 중합을 하여 단열 복합재를 제조하였다. Aliphatic urethane diacrylate oligomer (EBECRY®210), tetrahydrofurfuryl acrylate monomer, di(trimethylolpropane) tertraacrylate crosslinker, phenyl bis(2,4,6-trimethylbenzoyl) phosphine oxide photoinitiator와 다공성 입자를 첨가하여 20%, 35%, 50%의 다공성 복합재를 합성하였다. UV경화는 혼합물을 실리콘 몰드에 캐스트를 하고 5분간 250mW /㎠의 광도로 조사하여 시료를 제조하였다. 동적 기계적 분석기(DMA)를 이용하여 온도 및 주파수 변화에 따른 단열 복합재의 저장 탄성률, 손실 계수, 탄 델타 및 유리 전이 온도(Tg)를 확인하였으며, 저장 탄성 계수는 동적 기계적 분석기기의 분석 방법중의 하나인 Frequency Multiplex기법을 사용하여 값을 얻을 수 있었다, 저장 탄성 계수에 Time Temperature Superposition Principle(TTSP) 공식을 적용하여 마스터 곡선을 얻어 재료의 장기적인 물성 변화를 예측하였다.
곽보민,최부철,서민영,정수란,권영환 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
TiO<sub>2</sub> particles have excellent properties such as good stability, high refractive index, hydrophilicity, UV resistance and excellent transparency for the visible light. This study investigates the effect of different TiO<sub>2</sub> filler contents on the mechanical properties of silicone/TiO<sub>2</sub> composites, where surface-modified TiO<sub>2</sub> particles using vinyl-trimethoxy silane are used. The silicone/TiO<sub>2</sub> composites with the mass fraction of TiO<sub>2</sub> particles up to 20% was prepared by bulk mixing method and showed the mechanical enhancement with increasing the surface-modified TiO<sub>2</sub> content.
곽보민,신영은,서민영,권영환 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Inorganic-organic hybrid materials are a new type of composite material in which the inorganic and the organic components are combined at the molecular level There has been much research on the application of these hybrid materials as functional coatings on glass and polymer substrates, because the organic part of the hybrid material can improve the adhesion between the particle and a polymer substrate, and the inorganic part can increase the hardness of the polymer. In this study, silica (H25)/vinytriethoxysilane hybrid materials were prepared by the hydrolysis and condensation reactions. The thermal conductivity, mechanical and dynamic mechanical properties of the heat-insulated composite revealed that the insulation properties increased with increasing the particle content. It also confirmed that storage modulus increased after glass transition temperature. This is assumed to be the effect of chemical bonds between the organic functional groups on the surface of silica and the PDMS.
신영은,곽보민,권영환 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Graphite is recognized as the best filler due to its excellent thermal conductivity, low cost, and good dispersion in matrix. The layer of the graphite with thickness of 20 to 100nm is called expanded graphite. It has been widely used as a polymer composite material. This study aimed to investigate the effect of size and dispersion of Expanded graphite (EG) on thermal conductivity and mechanical properties of silicone/EG composites. The silicone/EG composites with the mass fraction of 1%, 3%, 5%, 10%, and 20% EG were prepared by 2 kinds of mixing method (bulk, solvent). Compared to the pure silicone polymer, silicone/EG composite filled with 20% of EG (140um of average particle size), prepared by solvent mixing method dramatically improved the thermal conductivity from 0.15 to 1.1431 W/m K.