KR102291752B1 - 산기 치환 표면 개질 질화붕소, 이의 제조방법 및 이를 함유한 방열성 조성물 - Google Patents
산기 치환 표면 개질 질화붕소, 이의 제조방법 및 이를 함유한 방열성 조성물 Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/064—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with boron
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Abstract
또한, 본 발명에 따른 산기 치환 표면 개질 질화붕소를 함유한 방열성 조성물은 기재수지에 산기로 치환된 표면 개질 질화붕소가 혼합 및 분산함으로써, 낮은 점도 대비 열전도도, 인장강도 및 경도가 향상된 고분자 복합체를 제공한다.
Description
도 2은 질화붕소, 벤조산 또는 벤조산에 의해 표면 개질된 질화붕소의 결합형태를 푸리에 변환 적외선 분광학(FT-IR spectra) 및 자외 및 가시선 분광분석법(UV-Vis absorbance)으로 도식한 것이다. 표면이 개질된 질화붕소에서는 푸리에 변환 적외선 분광학결과에 따라, 벤조산 및 개질되지 않은 질화붕소물의 작용기에서 나오는 peak들이 중첩되어 peak들이 넓게 퍼지는 것을 알 수 있다. 또한, 표면이 개질된 질화붕소에서는 자외 및 가시선 분광분석법 결과에 따라, 벤조산의 페닐기 단파장으로 인해, 225nm에서 peak이 확인되는데 이는, 벤조산 및 질화붕소는 π-π결합을 형성하고 있음을 알 수 있다.
도 3는 입자크기가 다른 질화붕소를 일정한 혼합 중량비에 따라 에폭시 수지에 분산 및 혼합시킨 후 방열성 조성물의 (a)점도(Viscosity) (b)열전도율(Thermal conductivity)을 도시한 것이다.
도 4은 (a)표면 개질된 질화붕소 또는 (b)표면 개질되지 않은 질화붕소가 함유된 방열성 조성물의 단면을 에너지 분산형 분광분석법(energy dispersive spectrometry)으로 성분분석한 결과를 도시한 것이다.
도 5는 질화붕소 표면 개질조건 및 크기가 다른 질화붕소입자의 혼합조건에 따라 제조된 방열성 조성물의 경도(Stiffness)와 인장강도(Effective modules)를 측정하고, 가해진 외부 자기장(Hz)에 따른 유전율(Dielectric permittivity)결과를 도시한 것이다.
Claims (13)
- 기재수지; 및
상기 기재수지에 분산된 질화붕소;를 포함하고,
상기 질화붕소는 π-π 스태킹된 벤조산에 의해 표면개질된 것이고, 입자의 크기가 8 내지 15 μm인 큰 질화붕소(BNl)와 입자의 크기가 0.5 내지 8 μm 미만인 작은 질화붕소(BNs)가 9:1 내지 7:3의 중량비로 포함되어지며,
전체 조성물 중 상기 표면개질된 질화붕소가 50wt%로 포함될 때 열전도율이 2.2(W/m·K)이상이고, 인장강도가 10GPa 이상인 방열성 조성물. - 삭제
- 제 1항에 있어서,
상기 방열성 조성물은 상기 기재수지가 에폭시일 경우, 경도가 0.3GPa 이상인 것인 방열성 조성물. - 제 3항에 있어서,
상기 방열성 조성물은 1.8 ×106cP이하의 점도를 가지는 방열성 조성물. - 삭제
- 제 1항에 있어서,
상기 기재수지는 아크릴계 수지, 페놀계 수지, 우레탄계 수지, 멜리민계 수지, 불소계수지, 실리콘계 수지 및 에폭시계 수지에서 선택되는 하나 또는 둘 이상을 포함하는 것인 방열성 조성물. - 제 1항에 있어서,
상기 방열성 조성물은 탄소 재료를 더 포함하는 것인 방열성 조성물. - 제 7항에 있어서,
상기 탄소 재료는 그라파이트, 탄소나노튜브, 탄소섬유 및 그래핀으로 이루어진 군에서 선택되는 하나 또는 둘 이상을 포함하는 것인 방열성 조성물. - 1) 벤조산과 질화붕소를 혼합하여 분산액을 제조하는 단계; 및
2) 상기 분산액을 가압하여 상기 벤조산과 질화붕소 사이에 π-π 스태킹을 형성하는 단계;를 포함하되,
상기 1) 단계에서 질화붕소는 입자의 크기가 8 내지 15 μm인 큰 질화붕소(BNl)와 입자의 크기가 0.5 내지 8 μm 미만인 작은 질화붕소(BNs)가 9:1 내지 7:3의 중량비로 혼합되는 친수성 표면 개질된 질화붕소의 제조방법. - 삭제
- 삭제
- 제 9항에 있어서,
상기 벤조산 및 질화붕소는 중량비로 100:1 내지 100:50 포함되는 것인 친수성 표면 개질된 질화붕소의 제조방법. - 삭제
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