• Title, Summary, Keyword: 기능성 실란

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Preparation of O-I hybrid sols using alkoxysilane-functionalized amphiphilic polymer precursor and their application for hydrophobic coating (알콕시 실란기능화 양친성 고분자 전구체를 이용한 유-무기 하이브리드 졸 제조 및 이를 이용한 발수 코팅)

  • Lee, Dae-Gon;Kim, Nahae;Kim, Hyo Won;Kim, Juyoung
    • Journal of Adhesion and Interface
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    • v.20 no.4
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    • pp.146-154
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    • 2019
  • In this study, alkoxysilane-functionalized amphiphilic polymer (AFAP), which have hydrophilic segment and hydrophobic segment functionalized by alkoxysilane group at the same backbone, was synthesized and used as a dispersant and control agent for reaction rate in the preparation of colloidally stable organic-inorganic (O-I) hybrid sols. After reaction with fluorosilane compounds, fluorinated O-I hybrid sols were prepared and coated onto glass substrate to form hydrophobic O-I hybrid coating films through low-temperature curing process. Surface hardness and hydrophobicity of cured coating films were varied with type of solvent and composition of AFAP and fluorinated alkoxysilane compounds. At appropriate solvent and composition of fluorinated alkoxysilane compounds, O-I hybrid coating film having high transparency and surface hardness could be prepared, which could be applicable to cover window of solar cell and displays.

Surface Characteristics of Silicon Substrates Coated with Self-assembled Mono-layers (자체조립 단일막으로 코팅된 실리콘 기판의 표면특성)

  • 최성훈;강호종
    • Polymer Korea
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    • v.28 no.1
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    • pp.3-9
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    • 2004
  • Silane modified perfluoropolyethers (SPFPE) was synthesized as a self-assembled mono-layers (SAMs) thin film for micro-electro mechanical system (MEMS). SPFPE was compared to the Perfluoropolyethers (PFPE) as well as octadecyltrichlorosilane (OTS) and perfluorooctyltrichlorosilane (FOTS) with respect to the development of hydrophobicity in the SAMs surface. SPFPE shows less hydrophobicity than those of OTS and FOTS. Thermal annealing of SPFPE SAMs resulted in the enhancement of hydrophobicity as much as those of OTS and FOTS. The SAMs formed from SPFPE were found to be similar as OTS and FOTS SAMs with smooth R$\sub$a/ values of 0.3 nm. However, the flexible chain mobility of SPFPE resulted in 50% reduction as much as the fiction force in OTS.

Development of Alkoxysilane Mixed Solution as Stone Preservation and Consolidation Materials (알콕시 실란계 석재 보존 및 강화제 개발)

  • Kim, Eun-Kyung;Park, Seong-Yong;Cho, Hyun-Dong;Won, Jong-Ok;Do, Jin-Young;Kim, Sa-Dug
    • Journal of Conservation Science
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    • v.21
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    • pp.21-32
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    • 2007
  • Low-viscosity alkoxysilanes that polymerize into the porous network of decayed stone by a sol-gel process are widely used as stone consolidants. During drying, the gel network contracts due to capillary pressure generated by solvent evaporation. We have prepared tetraethoxysilane mixed solution containing methyltrisilane, ethyl trisilane and (3-glycidyloxypropyl)trimethoxysilane having epoxy ring in order to reduce the shrinkage happened inside the stone porous structure during the gel formation. Mixed solutions were applied into sandstone and granites and characterized by FT-IR, SEM. The gelation time, water uptake, contact angles were measured and compared with those of the commercial stone conservation materials.

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Bifunctional Silane (TESPD) Effects on Silica Containing Elastomer Compound Part I: Natural Rubber (NR) (양기능성실란(TESPD)이 실리카함유 복합소재에 미치는 영향)

  • Kim, Kwang-Jea
    • Elastomers and Composites
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    • v.44 no.2
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    • pp.134-142
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    • 2009
  • Organo bifunctional silane (TESPD) is added into silica containing NR and its effects are investigated with respect to the vulcanization properties, the processability, and the physical properties. The addition of the TESPD into silica filled NR compound increases the degree of crosslinking by formation of a strong 3-dimensional network structure with silica surface via coupling reaction, which results in an improved mechanical property. It also improves the processabilities compared to the Control compound.

Bifunctional Silane (TESPD) Effects on Silica Containing Elastomer Compound Part II: Styrene-co-Butadiene Rubber (SBR) (양기능성실란(TESPD)이 실리카 함유 복합 소재에 미치는 영향 Part II: Styrene-co-Butadiene Rubber (SBR))

  • Jeon, Duk-Kyu;Kim, Kwang-Jea
    • Elastomers and Composites
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    • v.44 no.3
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    • pp.252-259
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    • 2009
  • Bifunctional silane (TESPD) is added into silica filled SBR compound and its effects with respect to the vulcanization properties, the processability, and the physical properties are investigated. The addition of the TESPD into silica filled SBR compound increases the degree of crosslinking by formation of a strong 3-dimensional network structure with silica surface via coupling reaction, which results in an improved mechanical property. It also improves the processabilities compared to the Control compound.

Preparation and Polymerization of Alkenylsilanes (Alkenylsilane의 제조와 고분자화반응)

  • Kim, Chung Kyun;Choi, Soon Kyu;Park, Eun Mi;Jung, In Kyung
    • Journal of the Korean Chemical Society
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    • v.41 no.2
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    • pp.88-97
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    • 1997
  • The silyltriflates$(Ph_{3-n}SiH(OTf)_n)$have been produced by the reaction of triphenylsilane and triflic acid$(CF_3SO_3H)$at low temperature. These highly reactive compounds are a valuable reagent for the synthesis of numerous new functional substituted silane derivatives. The reaction of silyltriflates with alkenyl- and alkynylmagnesium bromide as well as organolithium compounds gave new silanes$Ph_2SiHR(R=\;C(CPh,\;CH=CH_2,\;CH_2CH=CH_2,\; (CH_2)_2CH=CH_2,\;(CH_2)_3CH=CH_2)$in high yields. The hydrosilation of prepared alkenyl- and alkynylsilanesPh_2SiHR$in the presence of a platinum catalyst(Pt/C) at high temperature$(200{\circ}C)$gave carbosilane polymers$((Ph_2SiCH=CPh)_n$and$(Ph_2Si(CH_2)m)n;\;m=2∼4, n{\ge}10)$along with five- and six-membered silaalkane ring compounds derived from intramolecular hydrosilation reactions. All of the prepared compounds are confirmed by NMR, UV, IR and mass spectroscopy as well as elemental analysis.

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The Effect of Functionalized Organosilane Coupling Agent on the Adhesion Properties of 2 Layer Flexible Copper Clad Laminate (기능성 실란커플링제가 2-FCCL의 접착특성에 미치는 영향)

  • Park, Jin-Young;Lim, Jae-Phil;Kim, Yong-Seok;Jung, Hyun-Min;Lee, Jae-Heung;Ryu, Jong-Ho;Won, Jong-Chan
    • Polymer Korea
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    • v.33 no.6
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    • pp.525-529
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    • 2009
  • In order to manufacture 2-layer flexible copper clad laminate (FCCL) s having the excellent performance high adhesion properties between copper foil and polyimide film are required. Silane coupling agents with specific functional groups as an adhesion promoter are generally used to enhance the adhesion. In our study, we synthesized a novel silane coupling agent for increasing the adhesive property between copper layer and polyimide layer. The surface morphology of rolled copper foil, as a function of the concentrations of the coated silane coupling agent, was fully characterized. As fabricated 2-layer FCCL, we observed that adhesive properties were changed by the surface morphology and we confirmed that the novel silane coupling agent affects adhesive properties in FCCL with two types of poly (amic acid)s.

Preparation and Characterization of Organic/Inorganic Hybrid Membranes Using Organo-silane via Grafting Methods (그래프팅 방법을 이용한 유-무기 혼성막의 제조 및 특성 분석)

  • 오석일;강태욱;문정우;김홍곤;이종협
    • Proceedings of the Membrane Society of Korea Conference
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    • pp.160-162
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    • 2004
  • 기계적, 열적 강도가 우수한 무기막과 다양한 기능성을 가질 수 있는 유기막의 결합에 관하여 그동안 많은 연구가 진행되어왔다. 무기막은 높은 열적, 기계적 안정성을 가지고 있기 때문에 지지체로써 큰 이점을 가지고 있으며, 고분자를 비롯한 유기막은 그 다양성과 응용성에 있어 장점을 가지고 있다. 이에 본 연구는 지지체로써 물성이 뛰어난 세라믹막의 표면에 다양한 유기 기능기를 가지는 실란화합물을 그래프팅 방법을 통하여 도입하여 유-무기 혼성막을 제조하고 표면 특성의 변화를 살펴보고자 하였다.(중략)

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Modification of glass fiber bundle with functionalized coupling agents and phenolic resin (기능성 커플링제와 페놀수지에 의한 유리섬유 다발의 표면개질 연구)

  • Lee, Soo
    • Journal of the Korean Applied Science and Technology
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    • v.33 no.1
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    • pp.168-175
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    • 2016
  • The surface of glass fiber bundle was modified with functionalized silanes and phenolic resin to improve the tensile strength as well as the adhesion of glass fiber to matrix phenolic resin. The surface modification of reinforcing glass fiber can play a significant role in controlling whole composite characteristics. We applied surface modification of glass fiber with two different functionalized silanes, such as glycidyltrimethoxysilane(G-silane) and aminopropyltriethoxysilane (A-silane), and phenol formaldehyde(PF) resin in one pot or separated process under different coating compositions and temperatures. Thermal treatment temperature is very important factor to improve the mechanical properties of modified glass fiber. Modified glass fiber bundle treated at $170^{\circ}C$ showed the highest tensile strength of $10.05g_f/D$. Surface analyses by scanning electron microscope(SEM) and FT-IR spectroscopy were used to characterize the surface coatings on glass fiber bundles. Mechanical property changes as functions of treatment conditions and coupling agent types were also explained.

Preparation of Polypropylene/Clay Nanocomposites Using Aminosilane Treated Clay (아미노실란 개질 클레이를 사용한 폴리프로필렌 클레이 나노복합재료)

  • Hong Chae-Hwan;Bae Jin-Woo;Lee Yong-Bum;Lee Choon-Soo;Jho Jae-Young;Nam Byeong-Uk
    • Polymer Korea
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    • v.30 no.4
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    • pp.318-325
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    • 2006
  • Polypropylene-clay nanocomposites were studied by the modification of clay with amino silanes to introduce covalent bonds in nanocomposites, and prepared by melt-compounding with polypropylene, clay modified with amino silanes and maleic anhydride grafted polypropylene. The . .structure and surface properties of modified clay were determined by x-ray diffraction, infrared spectrum, and solid-state $^{29}Si$ nuclear magnetic resonance spectrum. The modification of clay with aminosilanes led to the increase of the silicate interlayers to about $19.8{\AA}$, the weakening effects of hydroxy group at $3650cm^{-1}$ and the signal of amine groups at -69 ppm proved that the modification had taken place.