• Title/Summary/Keyword: silane binder

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Effect of intermolecular interactions between CNTs and silane binders on the opto-electrical properties of SWNT/silane binder films (탄소나노튜브와 바인더의 상호작용이 탄소나노튜브/바인더 박막의 정전기적 특성에 미치는 영향)

  • Han, Joong-Tark;Kim, Sun-Young;Jeong, Hee-Jin;Jeong, Seung-Yol;Lee, Geon-Woong
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.04b
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    • pp.97-98
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    • 2009
  • Here, we describe a versatile strategy for precise control of the optoelectrical properties of the single walled carbon nanotube (SWNT)/silane binder hybrid films by noncovalent hybridization. Stable SWNT/silane binder solutions were prepared by direct mixing of high concentration CNT solutions and silane sol solutions. The critical binder content was determined by varying the amount of binder in the SWNT/binder solutions. A binder content of 50 wt% was used to prepare the other SWNT/binder solutions. This study demonstrates how the intermolecular interactions between the SWNTs and the silanes can affect the conductivity of the CNT/binder network films by characterizing the optoelectrical and Raman spectroscopic properties of the SWNT/silane films containing silane binders with various functional groups. The use of the PTMS binder with phenyl groups was found to be most effective in the fabrication of transparent and conductive films on glass substrates. Such a precise control of the optoelectrical properties of SWNT/binder films can be useful to fabricate the high performance conductive thin films, with ramifications for understanding the fundamental intermolecular interaction in carbon materials science.

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The Effect of Silane Compound on the Cure Reaction and Mechanical Properties of PEG, PCP Binder for Propellant (Silane화합물이 추진제용 PEG, PCP바인더의 경화 및 특성에 미치는 영향)

  • 홍명표
    • Journal of the Korean Society of Propulsion Engineers
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    • v.4 no.2
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    • pp.1-5
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    • 2000
  • The silane compounds as a coupling agent have been used in the propellant in order to enhance the mechanical property and lower the viscosity. They showed great effects in the PEG propellant. In PCP propellant, however, the silane compounds not only made a severe cure problem but also deteriorated the mechanical property. In this study, TESPN as a silane compound was applied in PEG and PCP binder for finding above factors. The main reason was that the main chains of PCP were broken due to the trans-esterification reaction of ester groups in PCP and alchol which was produced by reacting silane compounds and moisture in the solution of liquid binder.

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Preparation of Acryl Binder with Silane Type Chain Transfer Agent (실란계 사슬 이동제를 사용한 아크릴 바인더의 제조)

  • Kim, Jin-Gon;Shin, Min-Jae;Shin, Jae-Sup
    • Polymer(Korea)
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    • v.36 no.3
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    • pp.351-356
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    • 2012
  • Acryl binder is a representative organic additive for the manufacture of the display electronic equipment. Acryl binder is usually synthesized by radical copolymerization. Glycidyl methacrylate (GMA), methyl methacrylate (MMA), and methacrylic acid (MAA) were used in this copolymerization of acryl binder. In this study the silane type mercaptane compound was used as a chain transfer agent (CTA) to enhance the adhesion property of the acrylic binder. The CTA used in this experiment was (3-mercaptopropyl) trimethoxysilane (MPTMS). Molecular weight of the copolymer, thickness of the coating, transmittance, and adhesion property were measured. The molecular weight was controlled and the adhesion property was improved by using this silane type chain transfer agent.

Influence of a silane coupling agent on the optoelectrical properties of carbon nanotube/binder hybrid thin films

  • Han, Joong-Tark;Woo, Jong-Seok;Jeong, Hee-Jin;Jeong, Seung-Yol;Lee, Geon-Woong
    • Carbon letters
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    • v.12 no.2
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    • pp.90-94
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    • 2011
  • We present the effect of a coupling agent on the optoelectrical properties of few-walled carbon nanotube (FWCNT)/epoxy resin hybrid films fabricated on glass substrates. The FWCNT/epoxy resin mixture solution was successfully prepared by the direct mixing of a $HNO_3$-treated FWCNT solution and epoxy resin. FWCNT/binder hybrid films containing different amounts of the coupling agent were then fabricated on UV-ozone-treated glass substrates. To determine the critical binder content ($X_c$), the effects of varying the binder content in the FWCNT/silane hybrid films on their optoelectrical properties were investigated. In this system, the $X_c$ value was approximately 75 wt%. It was found that above $X_c$, the coupling agent effectively decreased the sheet resistance of the films. From microscopy images, it was observed that by adding the coupling agent, more uniform FWCNT/binder films were formed.

Friction and Wear Characteristics of Bonded Film Lubricants of Organically Modified Hybrid Ceramic Binder Materials (유기변성 하이브리드 세라믹 물질을 결합제로 이용한 고체피막윤활제의 마찰마모 특성)

  • 한흥구;공호성;윤의성
    • Tribology and Lubricants
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    • v.19 no.4
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    • pp.203-210
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    • 2003
  • In order to enhance the thermal stability of binder materials of bonded type solid lubricants, several metal-alkoxide based sol-gel materials such as methyltrimethoxysilane(MTMOS), titaniumisopropoxide (Ti(Opr$\^$i/)$_4$), zirconiumisopropoxide (Zr(Opr$\^$i/)$_4$) and aluminumbutoxide (Al(Obu$\^$t/)$_4$) were modified chemically by both epoxy and acrylic silane compounds. Friction and wear characteristics of the bonded solid lubricants, whose binders were of several hybrid ceramic materials, were tested with a reciprocating tribo-tester. Wear life was evaluated with respect to the heat-curing temperature, friction temperature, type of supplement lubricants, and ratio of binder materials. Test results showed that the Si-Zr hybrid ceramic materials modified by epoxy-silane compounds had a higher wear life compared to others. Sb$_2$O$_3$ was the most effective supplement lubricants in the high temperature, and BUS analyses revealed that it was caused mainly by a strong anti-oxidation effect to MoS$_2$ particles. The higher heat-curing temperature resulted in the higher wear life, and the higher friction temperature resulted in the lower wear life.

Effect of PET Film Treatment on Adhesive Properties Between PET Film and Conductive Paste (PET 필름과 전도성 페이스트의 접착성에 미치는 PET 필름 처리 영향)

  • Yeong Seo Hong;Youn Cheol Kim
    • Applied Chemistry for Engineering
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    • v.35 no.3
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    • pp.209-213
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    • 2024
  • To improve the adhesion properties between the conductive paste and PET film, the PET film was chemically treated using acids and bases and physically treated through corona discharge. A paste using ethylcellulose, which is used in actual industrial manufacturing and silane-treated CNF, as a binder was manufactured and coated on PET film to compare the adhesive properties. The specimen coated with a paste containing silane-treated CNF as a binder on a corona discharge-treated PET film showed the highest level of adhesion, 5B. On the other hand, it was confirmed that when PET film was chemically treated with acid/base, there was no improvement in adhesive properties.

Injection Molding of Silicon Nitride Powders Treated with Coupling Agents (커플링제로 처리된 질화규소 분말의 사출성형)

  • 송휴섭
    • Journal of the Korean Ceramic Society
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    • v.30 no.2
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    • pp.131-138
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    • 1993
  • The effects of silane coupling agents on the injection molding process were investigated using silicone nitride mixtrues with a binder system containing polypropylene as a major binder (55vol% solid loading). The formation of bonding between silicon nitride powder and coupling agents was confirmed through the analyses of powder surface. The use of coupling agents improved mixing characteristics judged by the torque change during mixing process. the coupling agents also reduced molten viscosity of the mixture considerably, which is a main factor to determine the flow of the mixture. However, the bonding between coupling agents and polymers had a negative effect on the debinding process by retarding the thermal decomposition.

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An Experimental Study on the Micro Friction and Wear Characteristics of Organically Modified Hybrid Ceramic Materials by A Sol-Gel Process (졸-겔 공정에 의한 유기변성 하이브리드 세라믹 물질의 미세 마찰마모 특성)

  • Han, Hung-Gu;Kong, Ho-Sung;Yoon, Eui-Sung;Yang, Seung-Ho
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 2002.05a
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    • pp.215-225
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    • 2002
  • In order to enhance the thermal stability of binder materials of bonded type solid lubricants, several combinations of metal-alkoxide based sol-gel materials such as methyltrimethoxysilane(MTMOS), $titaniumisopropoxide(Ti(Opr^{j})_{4})$, $zirconiumisopropoxide(Zr(Opr^{j})_{4})$ and $aluminumbutoxide(Al(Obu^{t})_{4})$ were chemically modified by epoxy-, acrylic- and fluoro-silane compounds, respectively, in this work. Friction and wear characteristics of these hybrid ceramic materials were tested with a micro tribe-tester where a reciprocating steel ball slid on a test material, and the tribological property was also evaluated with respect to both heat-curing temperature and tile time. Test results generally showed that hybrid ceramic materials modified by epoxy-silane compounds had a low friction compared to others. And the higher heat-curing temperature and the longer heat treatment time resulted in the higher friction and the lower wear. IR spectroscopic analyses revealed that it was caused mainly by the increased metal oxide content in hybrid ceramics when the heat-curing temperature was over $320^{\circ}C$.

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Micro Friction and Wear Characteristics of Organically Modified Hybrid Ceramic Materials Synthesized by A Sol-Gel Process (졸-겔 공정에 의한 유기변성 하이브리드 세라믹 물질의 미세 마찰마모 특성)

  • Han, Hung-Gu;Kong, Ho-Sung;Yoon, Eui-Sung;Yang, Seung-Ho
    • Tribology and Lubricants
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    • v.18 no.5
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    • pp.324-332
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    • 2002
  • In order to enhance the thermal stability of binder materials of bonded type solid lubricants, several metal-alkoxide based sol-gel materials such as methyltrimethoxysilane(MTMOS), titaniumisopropoxide$(Ti(Opr^i)_4),$ zirconiumisopropoxide $(Zr(Opr^i)_4)$ and aluminumbutoxide$(Al(Obu^t)_4)$ were chemically modified by epoxy-, acrylic- and fluoro-silane compounds, respectively. Friction and wear characteristics of these hybrid ceramic materials were tested with a micro tribo-tester, and evaluated with respect to both heat-curing temperature and the time. Test results generally showed that hybrid ceramic materials modified by epoxy-silane compounds had a low friction compared to others. And the higher het-curing temperature and the longer heat treatment time resulted in the higher friction and the lower wear. IR spectroscopic analyses revealed that these results were caused mainly by the increased metal oxide content in hybrid ceramics when the heat-curing temperature was over $320^{\circ}C.$

The characteristics of Mn-TiO2 catalyst for visible-light photocatalyst (Mn-TiO2 촉매의 가시광촉매 특성)

  • Kim, Moon-Chan
    • Analytical Science and Technology
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    • v.24 no.6
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    • pp.493-502
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    • 2011
  • The catalyst works for visible-light region was characterized. Toluene, xylene, MEK and ammonia were used as reactants. The decomposition efficiency was compared between visible-light photocatalyst and UV-light one. UV-photocatalyst can be activated with UV-light wave length of 280~360 nm. However, visible-light photocatalyst can be activated with visible wave length of 400~750 nm. This result was found by using UV-Vis absorbance. A lot of materials were doped to visible light photocatalyst in order to increase its performance. Platinum was added to visible light photocatalyst with manganese in order to increase performance of the visible light photocatalyst. MTMS (Methyl tri methoxy silane) was used as a binder. Contact angle was analyzed varying with amount of binder. Contact angle was increased with increasing the amount of MTMS. As a result, the hydrophilic property of photocatalyst with MTMS binder was decreased due to its hydrophobic one. And Mn-$TiO_2$ catalyst had an excellent anti-bacterial property.