Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Preparation of Silicon-Based Hybrid Gels with POSS Additives and Their Application to LED Encapsulants

POSS계 첨가제를 가지는 실리콘 젤의 제조와 LED 봉지재 응용

  • Eun, Hee-Chun (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Im, Hee-Eun (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Lee, Yun Sang (Department of Physics, Soongsil University) ;
  • Kwark, Young-Je (Department of Organic Materials and Fiber Engineering, Soongsil University)
  • 은희천 (숭실대학교 유기신소재.파이버공학과) ;
  • 임희은 (숭실대학교 유기신소재.파이버공학과) ;
  • 이윤상 (숭실대학교 물리학과) ;
  • 곽영제 (숭실대학교 유기신소재.파이버공학과)
  • Received : 2014.08.14
  • Accepted : 2014.09.27
  • Published : 2015.03.25
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Abstract

Densely structured polyhedral oligomeric silsesquioxane (POSS) was employed as an additive to enhance hardness of silicon-based hybrid gels for LED encapsulants. To improve the miscibility of POSS and polysiloxane resin, alkyl or oligosiloxane branches were introduced to POSS moiety. Platinum-catalyzed hydrosilylation reactions were used to attach branches of 1-decanol, 9-decen-1-ol, and vinyl-terminated oligosiloxane to the POSS molecules. Alkyl-branched POSSs (decyl-POSS and decenyl-POSS) were immiscibile with polysiloxane resin and generated gels with low transparency and low hardness values. On the other hand, oligosiloxane-branched POSS (Siloxy-POSS) showed good miscibility with polysiloxane resin to give gels with high transparency. However, the prepared gels did not show noticeable improvement in hardness compared to the gels without the POSS additive.

고경도의 LED 봉지재로 치밀한 구조를 가지는 polyhedral oligomeric silsesquioxane(POSS)를 첨가제로 사용한 실리콘 젤을 제조하였다. 실록산 수지와의 상용성을 증가시키기 위하여 알킬기와 올리고실록산기를 가지로 갖는 POSS를 합성하였다. Hydrosilylation 반응을 통하여 가지와 POSS를 연결하였고, 1-decanol과 9-decen-1-ol의 반응에는 $H_2PtCl_6$을, 말단에 비닐기를 가지는 올리고실록산의 반응에는 1,3-divinyl tetramethyldisiloxane[Pt(dvs)]을 촉매로 사용하였다. 알킬기를 가지는 POSS(Decyl-POSS, Decenyl-POSS)를 사용한 실리콘 젤의 경우 실록산 수지와의 혼화성이 낮아서, 가시광선 영역의 투과도가 낮았으며 경도값도 낮았다. 이에 비해 올리고실록산기를 가지로 가지는 POSS(Siloxy-POSS)를 적용하였을 경우에는 실록산 수지와 혼화성이 우수하여 높은 투명도를 보였으나, POSS의 첨가로 인한 경도 증가는 뚜렷하게 나타나지 않았다.

Keywords

Acknowledgement

Supported by : 숭실대학교

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