KR20200127351A - 초소수성을 갖는 나노입자 형성방법 - Google Patents
초소수성을 갖는 나노입자 형성방법 Download PDFInfo
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Abstract
Description
도 2는 본 발명의 일실시 예에 따른 초발수성을 갖는 나노입자 형성방법의 전체 공정도다.
도 3은 투명한 PDMS 필름 표면에 마이크로 구조체를 형성하는 단계를 도시한 공정도다.
도 4는 도 3에 도시된 단계를 통해 형성된 마이크로 구조체의 형상을 나타내는 SEM(scanning electron microscope ) 이미지다.
도 5는 초소수성 나노입자가 생성된 PDMS를 이용한 초발수 표면의 마이크로 채널을 도시한 도다.
도 6은 본 발명의 일실시 예에 따른 초발수성 나노 실리카 입자가 생성된 PDMS 필름(버섯구조) 이미지이며, 도 7은 본 발명의 다른 실시 예에 따른 초발수성 나노 실리카 입자가 생성된 PDMS 필름(원기둥 구조) SEM 이미지다.
도 8은 표면 연소 전 접촉각(145°) 표면 연소 후 접촉각(161°)을 보여주는 이미지이며, 도 9는 HDFS 코팅 후 n-Hexadecane에 대한 접촉각(147도°)을 보여주는 이미지다.
도 10은 PR몰드를 통해 제작한 버섯 구조의 PDMS 필름에 확산화염을 이용한 연소 시 소수성 나노입자를 생성한 표면의 원소 함량 XPS 분석 결과를 도시한 그래프이며, 도 11은 HDFS 코팅 후 표면 XPS 분석 결과를 도시한 그래프다.
도 12는 평면(flat)의 PDMS에서 Scotch tape 부착 후 제거 시 접촉각 변화(각각 161°, 132°, 113°)를 나타내는 이미지, 도 13은 버섯 구조를 지닌 PDMS에서 Scotch tape 부착 후 제거 시 접촉각 변화를 나타내는 이미지이며, 도 14는 도 13에서 접촉각을 측정한 표면의 SEM 이미지이다.
도 15는 평균 1N의 힘을 가했을 때 Sand paper의 grit에 따른 접촉각 변화를 보여주는 그래프이며, 도 16은 1000grit로 sliding한 버섯 구조 표면 및 3000grit로 sliding한 버섯 구조 표면의 SEM 이미지다.
도 17은 초발수 PDMS 필름에 속력을 가진 모래의 충격 내구성 테스트 실험에 따른 모래 충격 후 접촉각을 나타내는 이미지다.
도 18은 Water drop 후 volume drop에 따른 접촉각 변화를 보여주는 이미지다.
도 19 내지 21은 플라즈마 실험결과를 보여주는 이미지 및 그래프다.
도 22는 본 발명의 실시 예들에 따라 제작된 PDMS 필름 인장 실험의 결과를 보여주는 이미지다.
도 23은 마이크로 구조 위에 나노 구조가 있을 경우 젖음이 발생하지 않는 Cassie-baxter 상태의 결과를 보여주는 도다.
Claims (8)
- 표면에 일정형상의 구조체가 형성된 PDMS 필름을 준비하는 단계; 및
상기 PDMS 필름의 표면을 확산화염을 이용하여 연소시켜 상기 PDMS 필름의 표면에 초소수성을 갖는 나노입자를 생성하는 단계를 포함하는 것을 특징으로 하는 초소수성을 갖는 나노입자 형성방법.
- 제 1 항에 있어서,
상기 확산화염은 파라핀 양초 또는 소이 양초의 확산연소 시 발생하는 500℃ 이상의 화염인 것을 특징으로 하는 초소수성을 갖는 나노입자 형성방법.
- 제 1 항 또는 제 2 항에 있어서,
상기 나노입자를 생성하는 단계는, 상기 PDMS 필름의 표면을 확산화염으로 40~50초 동안 연소시켜 생성되는 것을 특징으로 하는 초소수성을 갖는 나노입자 형성방법.
- 제 1 항 또는 제 2 항에 있어서,
상기 나노입자는 실리카 입자와 탄소 입자로 이루어지는 것을 특징으로 하는 초소수성을 갖는 나노입자 형성방법.
- 제 1 항 또는 제 2 항에 있어서,
상기 나노입자를 생성하는 단계는, 상기 구조체의 측벽에 균일한 나노입자를 생성하기 위하여 상기 PDMS 필름을 일정한 기울기로 기울인 상태에서 연소시키는 것을 특징으로 하는 초소수성을 갖는 나노입자 형성방법.
- 제 1 항 또는 제 2 항에 있어서,
상기 구조체는 버섯, 사각기둥 및 원기둥을 포함하는 형상에서 선택된 어느 하나로 마이크로 단위 크기를 갖는 구조체인 것을 특징으로 하는 초소수성을 갖는 나노입자 형성방법.
- 제 1 항 또는 제 2 항에 있어서,
소유성 구현을 위해 상기 나노입자가 생성된 PDMS 필름의 표면에 플루오린기 실란을 코팅하는 단계를 더 포함하는 것을 특징으로 하는 초소수성을 갖는 나노입자 형성방법.
- 제 7 항에 있어서,
상기 플루오린기 실란을 코팅하는 단계는 n-hexane: Heptadecafluoro-1,1,2,2, -tetrahydrodecyltrichlorosilane = 1000 : 1로 혼합하여 나노 실리카가 생성된 PDMS를 24시간 동안 용액 안에 넣고, 24시간 후 PDMS 필름을 hexane에 cleaning 후 60℃ 오븐에 3시간 동안 건조하는 것을 특징으로 하는 초소수성을 갖는 나노입자 형성방법.
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KR1020190051299A KR20200127351A (ko) | 2019-05-02 | 2019-05-02 | 초소수성을 갖는 나노입자 형성방법 |
US16/691,766 US11498842B2 (en) | 2019-05-02 | 2019-11-22 | Method of forming nanoparticles having superhydrophobicity |
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WO2023015575A1 (zh) * | 2021-08-13 | 2023-02-16 | 苏州大学 | 一种pdms可修复超疏水涂层及其制备方法 |
CN114082624A (zh) * | 2021-11-22 | 2022-02-25 | 江苏科技大学 | 一种耐久性超疏水蜡烛烟灰涂层及制备方法 |
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US20100004373A1 (en) * | 2008-07-02 | 2010-01-07 | Jingxu Zhu | Compositions and processes for producing durable hydrophobic and/or olephobic surfaces |
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