KR102314067B1 - 계면활성제가 적용된 소수성 실리카 에어로겔 분말과, 실리카 에어로겔을 사용한 복합발포체의 제조방법 및 이를 이용한 실리카 에어로겔 복합발포체 - Google Patents
계면활성제가 적용된 소수성 실리카 에어로겔 분말과, 실리카 에어로겔을 사용한 복합발포체의 제조방법 및 이를 이용한 실리카 에어로겔 복합발포체 Download PDFInfo
- Publication number
- KR102314067B1 KR102314067B1 KR1020190100585A KR20190100585A KR102314067B1 KR 102314067 B1 KR102314067 B1 KR 102314067B1 KR 1020190100585 A KR1020190100585 A KR 1020190100585A KR 20190100585 A KR20190100585 A KR 20190100585A KR 102314067 B1 KR102314067 B1 KR 102314067B1
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- KR
- South Korea
- Prior art keywords
- silica
- silica airgel
- solution
- airgel
- composite foam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000843 powder Substances 0.000 title claims abstract description 54
- 239000006260 foam Substances 0.000 title claims abstract description 49
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- 239000004094 surface-active agent Substances 0.000 title claims abstract description 24
- 230000002209 hydrophobic effect Effects 0.000 title description 10
- 239000004965 Silica aerogel Substances 0.000 title 2
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- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims abstract description 9
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- -1 silane compound Chemical group 0.000 claims description 28
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- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 claims description 22
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- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 16
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- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
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- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 14
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- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 9
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- 239000008096 xylene Substances 0.000 claims description 3
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- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical group CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
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- 239000004115 Sodium Silicate Substances 0.000 description 3
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
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- KZEVSDGEBAJOTK-UHFFFAOYSA-N 1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-2-[5-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]ethanone Chemical compound N1N=NC=2CN(CCC=21)C(CC=1OC(=NN=1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)=O KZEVSDGEBAJOTK-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/157—After-treatment of gels
- C01B33/158—Purification; Drying; Dehydrating
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Abstract
Description
그리고, 실리카 에어로겔 분말의 회수 방법은 물유리용액, 촉매, 계면활성제 및 유기 실란화합물을 사용하여 졸-겔 반응에 의하여 실리카 에어로겔을 생성하는 단계; 습윤겔을 비극성 유기용매를 첨가하여 용매 교환하는 단계;습윤겔 용액을 여과하는 단계; 및 여과단계에서 회수한 습윤겔을 건조하는 단계;를 포함하고, 이때, 상기 물유리용액은 0.2~ 1.5 M의 농도이고, 상기 촉매는 무기산 촉매이며, 상기 촉매는 3.0 ~ 4.0 M의 농도로 실리카 졸 대비 1:0.2~0.3의 부피비로 교반하여 혼합하며, 상기 계면활성제의 사용량은 실리카 용액 대비 1:0.005~0.01 중량%이고, 유기 실란화합물은 실리카 용액 대비 1:0.1~0.15 부피비를 가질 수 있다.
또한, 상기 유기 실란화합물은 헥사메틸실라잔(HMDS) 대신 디메톡시디메틸실란(DMDMS), 메틸트리메톡시실란(MTMS), 메톡시트리메틸실란(TMMS), 트리메틸클로로실란(TMCS) 중 하나이거나 이들 용액이 적어도 둘 이상 혼합된 혼합액일 수 있다.
그리고, 상기 유기용매는 n-hexane, n-heptane, Xylene, Cyclohexane, Benzene, Toluene 및 Acetone 중 하나이거나 이들 용액이 적어도 둘 이상 혼합된 혼합액일 수 있다.
또한, 용매를 교환하는 단계는 50℃의 온도분위기에서 진행될 수 있다.
그리고, 상기 건조하는 단계는 50℃ 내지 70℃ 사이의 온도에서 상압분위기로 수행될 수 있다.
또한, 실리카 에어로겔을 생성하는 졸-겔 반응에는 6.06~6.18 중량%의 실리카 용액이 사용되고, 사용되는 촉매의 농도는 1~5M이며, 질산, 염산, 황산, 초산 중 어느 하나이거나 이들을 혼합한 것을 사용할 수 있다.
그리고, 실리카 에어로겔 복합발포체 제조방법은 실리카 에어로겔과, 바인더 및 첨가제를 혼합하여 테프론 소재의 몰드에 혼합물을 투입한 후에, 마이크로웨이브를 사용하여 발포하며, 상기 실리카 에어로겔은 물유리용액, 촉매, 계면활성제 및 유기 실란화합물을 사용하여 졸-겔 반응에 의하여 실리카 에어로겔을 생성하는 단계; 습윤겔을 비극성 유기용매를 첨가하여 용매 교환하는 단계; 습윤겔 용액을 여과하는 단계; 및 여과단계에서 회수한 습윤겔을 건조하는 단계;를 포함하고, 이때, 상기 물유리용액은 0.2~ 1.5 M의 농도이고, 상기 촉매는 무기산 촉매이며, 상기 촉매는 3.0 ~ 4.0 M의 농도로 실리카 졸 대비 1:0.2~0.3의 부피비로 교반하여 혼합하며, 상기 계면활성제의 사용량은 실리카 용액 대비 1:0.005~0.01 중량%이고, 유기 실란화합물은 실리카 용액 대비 1:0.1~0.15 부피비를 가질 수 있다.
도 2는 실리카 에어로겔 복합발포체의 사진.
도 3은 본 발명에 의한 소수성 실리카 에어로겔 분말을 제조하는 과정을 순서대로 나타낸 순서도.
도 4는 본 발명에 의한 실리카 에어로겔을 사용한 복합발포체의 제조 과정을 순서대로 나타낸 순서도.
도 5는 본 발명에 따라 제조한 실리카 에어로겔 분말의 입자형상(FE-SEM).
도 6는 본 발명에 따라 제조한 실리카 에어로겔 분말의 FT-IR 분석 결과
제조방법 | 탭 밀도 [g/mL] |
비표면적 [m2/g] |
평균 기공크기 [nm] |
기공 부피 [mL/g] |
접촉각 [°] |
실시예1 | 0.07 | 781 | 13.98 | 3.27 | 142 |
실시예2-1 | 0.19 | 548 | 20.13 | 2.39 | 142 |
실시예2-2 | 0.50 | 257 | 9.914 | 0.41 | 10 |
실시예2-3 | 0.42 | 314 | 12.20 | 0.62 | 107 |
실시예2-4 | 0.16 | 578 | 21.45 | 2.96 | 128 |
실시예3-1 | 0.12 | 684 | 14.05 | 3.24 | 141 |
실시예3-2 | 0.13 | 671 | 16.27 | 3.54 | 136 |
실시예3-3 | 0.28 | 598 | 15.23 | 2.98 | 129 |
실시예4-1 | 0.17 | 494 | 24.7 | 3.05 | 127 |
실시예4-2 | 0.16 | 586 | 25.84 | 3.79 | 125 |
비교예 1 | 0.31 | 824 | 4.2 | 1.46 | 136 |
비교예 2 | 0.05 | 324 | 5.4 | 0.05 | 138 |
제조방법 | 열전도도 [mW/m·K] |
압축강도 [N/cm2] |
굴곡강도 [N/cm2] |
굴곡파괴 하중 [N] |
a가스유해성 [분] |
실시예5 | 0.017 | 12 | 152 | 43 | 14.0 |
실시예6-1 | 0.019 | 12 | 140 | 38 | 9.2 |
실시예6-2 | 0.023 | 13 | 136 | 41 | 7.6 |
실시예6-3 | 0.025 | 13 | 124 | 32 | 4.3 |
비교예3 | 0.045 | 8 | 84 | 19 | 3.7 |
비교예4-1 | 0.050 | 7 | 55 | 15 | 3.5 |
비교예4-2 | 0.058 | 7 | 34 | 10 | 3.2 |
비교예4-3 | 0.042 | 8 | 59 | 13 | 3.0 |
Claims (15)
- 실리카 에어로겔 분말의 회수 방법에 있어서,
물유리용액, 촉매, 계면활성제 및 유기 실란화합물을 사용하여 졸-겔 반응에 의하여 실리카 에어로겔을 생성하는 단계;
습윤겔을 비극성 유기용매를 첨가하여 용매 교환하는 단계;
습윤겔 용액을 여과하는 단계;
여과단계에서 회수한 습윤겔을 건조하는 단계;
를 포함하고,
상기 물유리용액은 0.2~ 1.5 M의 농도이고, 상기 촉매는 무기산 촉매이며, 상기 촉매는 3.0 ~ 4.0 M의 농도로 실리카 졸 대비 1:0.2~0.3의 부피비로 교반하여 혼합하고,
상기 계면활성제의 사용량은 실리카 용액 대비 1:0.005~0.01 중량%이고, 유기 실란화합물은 실리카 용액 대비 1:0.1~0.15 부피비를 갖는 실리카 에어로겔 분말의 제조방법.
- 삭제
- 제1항에 있어서,
상기 유기 실란화합물은 헥사메틸실라잔(HMDS) 대신 디메톡시디메틸실란(DMDMS), 메틸트리메톡시실란(MTMS), 메톡시트리메틸실란(TMMS), 트리메틸클로로실란(TMCS) 중 하나이거나 이들 용액이 적어도 둘 이상 혼합된 혼합액인 실리카 에어로겔 분말의 제조방법.
- 제1항에 있어서,
상기 유기용매는 n-hexane, n-heptane, Xylene, Cyclohexane, Benzene, Toluene 및 Acetone 중 하나이거나 이들 용액이 적어도 둘 이상 혼합된 혼합액인 실리카 에어로겔 분말의 제조방법.
- 제4항에 있어서,
용매를 교환하는 단계는 50℃의 온도분위기에서 진행되는 실리카 에어로겔 분말의 제조방법.
- 제1항에 있어서,
상기 습윤겔을 건조하는 단계는 50~100℃의 온도에서 1~4시간 동안 1차 건조된 후, 200℃이하에서 1~4시간 동안 2차 건조되는 것을 특징으로 하는 실리카 에어로겔 분말의 제조방법.
- 제1항에 있어서,
실리카 에어로겔을 생성하는 졸-겔 반응에는 6.06~6.18 중량%의 실리카 용액이 사용되는 실리카 에어로겔 분말의 제조방법.
- 삭제
- 실리카 에어로겔 복합발포체 제조방법에 있어서,
실리카 에어로겔과, 바인더 및 첨가제를 혼합하여 테프론 소재의 몰드에 혼합물을 투입한 후에, 마이크로웨이브를 사용하여 발포하며,
상기 실리카 에어로겔은
물유리용액, 촉매, 계면활성제 및 유기 실란화합물을 사용하여 졸-겔 반응에 의하여 실리카 에어로겔을 생성하는 단계;
습윤겔을 비극성 유기용매를 첨가하여 용매 교환하는 단계;
습윤겔 용액을 여과하는 단계;
여과단계에서 회수한 습윤겔을 건조하는 단계;
를 포함하고,
상기 물유리용액은 0.2~ 1.5 M의 농도이고, 상기 촉매는 무기산 촉매이며, 상기 촉매는 3.0 ~ 4.0 M의 농도로 실리카 졸 대비 1:0.2~0.3의 부피비로 교반하여 혼합하고,
상기 계면활성제의 사용량은 실리카 용액 대비 1:0.005~0.01 중량%이고, 유기 실란화합물은 실리카 용액 대비 1:0.1~0.15 부피비를 갖는 에어로겔 복합발포체의 제조방법.
- 제9항에 있어서,
상기 습윤겔을 건조하는 단계는 50~100℃의 온도에서 1~4시간 동안 1차 건조된 후, 200℃이하에서 1~4시간 동안 2차 건조되는 것을 특징으로 하는 에어로겔 복합발포체의 제조방법.
- 제9항에 있어서,
상기 바인더는 초산비닐(EVA)계, 포릴비닐알코올(PVA)계, 아크릴(Acryl)계, 아크릴아마이드(Acrylamide)계, 염화비닐(PVC)계, 폴리비닐아세탈(Polyvinyl acetal)계, 포화 폴리에스테르계, 폴리아미드계, 폴리에틸렌계, 천연고무계, 실리콘계 또는 멜라민계 중 어느 하나이거나 이들은 혼합한 것을 사용하여 발포한 에어로겔 복합발포체의 제조방법.
- 제9항에 있어서,
상기 발포하는 단계에서 마이크로파를 사용하여 발포하는 것을 특징으로 하는 에어로겔 복합발포체의 제조방법.
- 삭제
- 삭제
- 제9항 내지 제12항 중 어느 한 항의 제조방법으로 만들어진 복합발포체.
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