KR20170130704A - Method for forming hydrophobic coating layer using structuralization of pdms surface - Google Patents
Method for forming hydrophobic coating layer using structuralization of pdms surface Download PDFInfo
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Abstract
Description
본 발명은 PDMS 표면의 구조화를 통한 소수성 코팅막 형성방법에 관한 것으로, 더욱 상세하게는 폴리디메틸실록산(PDMS) 용액에 실리카(SiO2) 파우더 등을 혼합한 코팅액으로 대상 표면을 코팅하여 PDMS 코팅막 표면에 미세 요철이 형성되도록 함으로써, PDMS 고유의 특성을 뛰어넘어 소수성을 극대화하고, 이러한 소수성 표면을 간단한 방식으로 형성하여 PDMS가 코팅된 상태로 바로 사용이 가능하도록 하며, 주방용품 및 점성 용액 송수관 등 소수성 코팅이 필요한 다양한 분야에 광범위하게 적용될 수 있는 폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법에 관한 것이다.
The present invention in that, more specifically, polydimethylsiloxane (PDMS) PDMS coating film surface by coating a target surface with a coating solution mixed with silica (SiO 2) powder, such as a solution of the hydrophobic coating layer formation methods by the structure of the PDMS surface By forming fine concavities and convexities, it is possible to maximize hydrophobicity beyond the inherent properties of PDMS, to form such a hydrophobic surface in a simple manner, to enable the PDMS to be immediately used in a coated state, and to provide a hydrophobic coating To a method for forming a hydrophobic coating film through structuring of a polydimethylsiloxane (PDMS) surface that can be widely applied to various fields where it is necessary.
유리용기 등을 비롯한 주방용품 분야, 송수관 등을 비롯한 배관 분야, 반도체 분야, 건설 분야, 디스플레이 스크린 분야, 항공 분야 및 금속 배선 관련 분야 등 다양한 분야에서 소수성(Hydrophobic) 내지 발수성(Water repellency) 소재에 대한 수요가 증가하고 있다. (Water repellency) material in various fields such as a piping, a semiconductor, a construction, a display screen, an aviation, and a metal wiring, Demand is increasing.
이를 위해, 친수성(Hydrophilic) 기재를 소수성으로 표면 개질하기 위한 시도들이 진행되고 있으며, 예를 들어 무기(Inorganic) 개질제 및 유기(Organic) 고분자 개질제를 이용해 친수성 표면을 소수성화시킨 제품들이 시판된 바 있다.
To this end, attempts have been made to hydrophobically surface-modify a hydrophilic substrate, for example, products in which a hydrophilic surface is hydrophobically hydrophilized using, for example, an inorganic modifier and an organic polymer modifier .
폴리디메틸실록산(PDMS)은 소수성과 더불어 투명성, 유연성, 윤활성 및 이형성 등의 장점을 지녀 친수성 기재를 소수성으로 표면 개질하기에 적합한 실리콘 고분자이다.Polydimethylsiloxane (PDMS) is a silicone polymer suitable for surface modification of hydrophilic substrates with hydrophobicity, with advantages such as transparency, flexibility, lubrication and releasability as well as hydrophobicity.
그러나, 소수성 특성은 물질의 고유 특성과 표면의 미세 구조라는 두 가지 요소에 의해 결정이 되는데, PDMS는 기본적으로 소수성 물질이지만 그 고유 특성만으로는 요구되는 수준까지 소수성을 강화하는데 한계가 있다.
However, the hydrophobic property is determined by two factors, the intrinsic property of the substance and the microstructure of the surface. PDMS is basically a hydrophobic substance, but its intrinsic properties limit the ability to enhance hydrophobicity to the required level.
이러한 관점에서, PDMS의 고유 한계를 넘어서기 위해 PDMS의 표면을 구조화하여 그 소수성 특성을 제고하려는 시도가 일부 있었다. 예를 들어 소정의 구조를 지닌 표면에 PDMS를 조성한 뒤 떼어내는 방식 등이 보고된 바 있다.In this respect, there have been some attempts to structure the surface of the PDMS to enhance its hydrophobic properties in order to go beyond the inherent limitations of PDMS. For example, PDMS has been developed and removed from a surface having a predetermined structure.
그러나, 이러한 방식은 별도의 구조화된 표면을 준비해야 하고, 그 공정이 복잡할 뿐만 아니라, 소수성이 필요한 곳에 바로 적용하기도 어려운 문제가 있다.
However, this method has a problem that it is necessary to prepare a separate structured surface, the process is complicated, and it is also difficult to apply it directly to a place where hydrophobicity is required.
이에, PDMS의 고유 한계를 뛰어넘어 그 소수성 특성을 크게 향상시킬 수 있는 표면 구조화 방법으로서, 간단하고 경제적인 방식을 통해 수행되고, PDMS가 코팅된 상태로 바로 사용이 가능한 새로운 소수성 표면 개질방법에 대한 개발이 요구되고 있다.
Accordingly, it is an object of the present invention to provide a new hydrophobic surface modification method which can be used in a simple and economical manner and which can be used directly in a PDMS coated state, as a surface structuring method that can greatly improve its hydrophobic property beyond the inherent limit of PDMS Development is required.
본 발명은 상기와 같은 종래기술의 문제점을 해결하고자 한 것으로, 간단한 방식을 통해 폴리디메틸실록산(PDMS) 표면에 소수성 강화에 최적화된 요철을 형성하여 PDMS 고유의 특성을 뛰어넘는 강화된 소수성 특성을 부여할 수 있는 새로운 표면 개질방법을 제공함을 기술적 과제로 한다.
Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a hydrophobic property, which is superior to the inherent properties of PDMS by forming unevenness optimized for hydrophobic strengthening on the surface of polydimethylsiloxane The present invention provides a new surface modification method that can be applied to the surface of a substrate.
상기한 기술적 과제를 달성하고자, 본 발명은 S1) 폴리디메틸실록산(PDMS) 용액에 세라믹 파우더(예컨대, SiO2 파우더)를 첨가하고 균일하게 교반하여, 폴리디메틸실록산(PDMS)과 세라믹 파우더를 포함하는 혼합 코팅액을 제조하는 단계; S2) 제조된 혼합 코팅액을 소수성(Hydrophobicity)이 요구되는 대상 표면(예컨대, 유리 표면)에 코팅하는 단계; 및 S3) 코팅된 대상 표면을 베이킹하는 단계;를 포함하며, 상기 코팅된 폴리디메틸실록산(PDMS)의 표면에는 상기 세라믹 파우더에 의해 미세한 요철이 형성되어, 폴리디메틸실록산(PDMS) 표면의 소수성이 강화되는 것임을 특징으로 하는, 폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법을 제공한다.
In order to achieve the above technical object, the present invention provides a method for producing a polydimethylsiloxane (PDMS) comprising the steps of: S1) adding a ceramic powder (for example, SiO 2 powder) to a polydimethylsiloxane (PDMS) Preparing a mixed coating liquid; S2) coating the prepared mixed coating solution on an object surface (for example, a glass surface) requiring hydrophobicity; And S3) baking the coated object surface, wherein fine unevenness is formed on the surface of the coated polydimethylsiloxane (PDMS) by the ceramic powder to improve the hydrophobicity of the polydimethylsiloxane (PDMS) surface (PDMS) surface, which is characterized by the fact that the surface of the polydimethylsiloxane (PDMS) surface is hydrophobic.
본 발명은 PDMS 용액에 세라믹 파우더를 소정량 첨가한 용액으로 대상 표면을 코팅하여 소수성 강화에 최적화된 미세 요철 구조를 PDMS 표면에 형성함으로써, PDMS의 고유 한계를 뛰어넘는 극대화된 소수성 특성을 구현할 수 있다.The present invention can realize a maximized hydrophobic property that exceeds the inherent limit of PDMS by forming a micro concavo-convex structure on the surface of the PDMS by coating a target surface with a solution in which a predetermined amount of ceramic powder is added to the PDMS solution to optimize the hydrophobic property .
또한, 본 발명은 일반적인 PDMS 코팅방법을 사용하는바 소수성 코팅 공정이 쉽고 단순하며, 대면적 적용이 가능하여 양산에 적합할 뿐만 아니라, 비교적 가격이 저렴한 세라믹 파우더를 사용하는바 비용 면에서도 경제적이다.In addition, the present invention uses a general PDMS coating method and is easy and simple to apply the hydrophobic coating process, and can be applied to a large area, so that it is not only suitable for mass production but also is economical in terms of cost because it uses a relatively cheap ceramic powder.
또한, 본 발명은 PDMS가 코팅된 상태로 바로 소수성 특성을 사용할 수 있는 편리함이 있다.Further, the present invention has the convenience that the hydrophobic property can be directly used in a state in which the PDMS is coated.
또한, 본 발명에서 사용하는 PDMS 및 세라믹(예컨대, SiO2) 파우더는 비교적 안전한 소재인바 식자재 용기 등 여러 주방용품에 코팅하여 소수성을 부여하는데 적합할 뿐만 아니라, 점성 용액을 운반하는 관 내부에 코팅하여 용액의 운반효율을 향상시켜 에너지 절감을 가능케 하는 등 소수성 코팅이 필요한 다양한 분야에 광범위하게 적용될 수 있다.
In addition, the PDMS and ceramic (e.g., SiO 2 ) powder used in the present invention is suitable for imparting hydrophobicity by coating on various kitchen utensils such as a food material container and a relatively safe material, It can be widely applied to various fields in which a hydrophobic coating is required, such as improving the transportation efficiency of a solution and saving energy.
도 1은 종래의 PDMS 코팅과 본 발명의 일 실시예에 따른 PDMS/SiO2 파우더 코팅의 경우 각각의 접촉각을 보여주는 도면이다.
도 2는 일반 유리용기와 본 발명의 일 실시예에 따라 소수성 코팅막이 형성된 유리용기의 소수성 성능을 비교하여 보여주는 도면이다.FIG. 1 is a view showing contact angles of conventional PDMS coatings and PDMS / SiO 2 powder coatings according to one embodiment of the present invention.
FIG. 2 is a graph showing the hydrophobic performance of a general glass container and a glass container in which a hydrophobic coating film is formed according to an embodiment of the present invention.
본 발명은 폴리디메틸실록산(PDMS) 용액에 세라믹 파우더(예컨대, SiO2 파우더)를 혼합하고 대상 표면을 코팅하여 소수성 강화에 최적화된 표면 구조를 형성하는 방법으로서,The present invention relates to a method for forming a surface structure optimized for hydrophobic enhancement by mixing a ceramic powder (for example, SiO 2 powder) with a polydimethylsiloxane (PDMS) solution and coating an object surface,
S1) 폴리디메틸실록산(PDMS) 용액에 세라믹 파우더를 첨가하고 균일하게 교반하여, 폴리디메틸실록산(PDMS)과 세라믹 파우더를 포함하는 혼합 코팅액을 제조하는 단계;S1) adding a ceramic powder to a polydimethylsiloxane (PDMS) solution and uniformly stirring to prepare a mixed coating solution containing polydimethylsiloxane (PDMS) and a ceramic powder;
S2) 제조된 혼합 코팅액을 소수성(Hydrophobicity)이 요구되는 대상 표면에 코팅하는 단계; 및S2) coating the prepared mixed coating solution on a surface of the object requiring hydrophobicity; And
S3) 코팅된 대상 표면을 베이킹하는 단계;를 포함한다.
S3) baking the coated target surface.
상기 S1) 단계는 폴리디메틸실록산(PDMS) 용액에 세라믹 파우더를 첨가 및 혼합하여, 대상 표면을 코팅하여 표면 개질할 코팅액을 제조하는 단계이다.In step S1), a ceramic powder is added to and mixed with a polydimethylsiloxane (PDMS) solution to prepare a coating solution to be surface-modified by coating the target surface.
본 발명에서 사용하는 폴리디메틸실록산(PDMS)은 기본적으로 소수성을 지니는 실리콘 고분자로서, 기판의 상대적으로 넓은 영역에 안정적으로 코팅될 수 있고, 평탄하지 않은 표면에도 코팅 및 점착이 가능하며, 투명성, 내구성 및 유연성이 우수한 장점이 있다.
The polydimethylsiloxane (PDMS) used in the present invention is basically a hydrophobic silicone polymer that can be stably coated on a relatively large area of a substrate and can be coated and adhered to a non-planar surface, and transparency, durability And flexibility.
상기 PDMS 용액으로는 당업계에서 통상적으로 입수할 수 있는 일반적인 PDMS 용액(예컨대, PDMS가 증류수, 톨루엔, 자일렌, n-헥산 등에 용해되어 있는 것)을 사용하면 되며, 그 종류가 특별히 한정되는 것은 아니다.As the PDMS solution, a general PDMS solution (for example, one in which PDMS is dissolved in distilled water, toluene, xylene, n-hexane, or the like) can be used which is customarily available in the art. no.
일 구체예에서, 상기 PDMS의 중량평균분자량(Mw)은 100,000~500,000이고, 상기 PDMS 용액의 점도(25℃)는 100~1,000,000 cP인 것일 수 있다.
In one embodiment, the weight average molecular weight (Mw) of the PDMS is 100,000 to 500,000 and the viscosity (25 ° C) of the PDMS solution is 100 to 1,000,000 cP.
상기 세라믹 파우더로는 그 자체의 소수성 내지 친수성 여부를 불문하고, PDMS와 함께 배합 및 코팅되어 PDMS 코팅막 표면에 요철을 제공할 수 있는 것을 사용하면 된다. 이러한 세라믹 파우더에 의한 표면의 요철 구조화는 PDMS 고유의 한계를 넘어 그 소수성 특성을 향상시키는데 결정적인 역할을 한다.As the ceramic powder, it is possible to use a material capable of providing irregularities on the surface of the PDMS coating film by being blended and coated with PDMS regardless of its hydrophobic property or hydrophilic property. The structure of the irregularities on the surface by the ceramic powder plays a crucial role in improving the hydrophobic property beyond the inherent limit of the PDMS.
일 구체예에서, 상기 세라믹 파우더로는 실리카(SiO2), 알루미나(Al2O3), 산화티탄(TiO2), 산화마그네슘(MgO), 질화규소(Si3N4), 질화알루미늄(AlN) 및 질화붕소(BN) 파우더를 단독으로 또는 2종 이상 혼합하여 사용할 수 있다. 바람직하게는 실리카(SiO2) 파우더 또는 알루미나(Al2O3) 파우더(예컨대, 구형)를 사용하며, 더욱 바람직하게는 구형 실리카(SiO2) 파우더를 사용한다. 다양한 종류의 실리카(SiO2) 파우더는 시중에서 쉽고 저렴하게 입수할 수 있다.In one embodiment, the ceramic powder with a silica (SiO 2), alumina (Al 2 O 3), titanium (TiO 2), magnesium oxide (MgO), silicon nitride (Si 3 N 4), aluminum nitride (AlN) oxide And boron nitride (BN) may be used alone or in combination of two or more. Preferably, silica (SiO 2 ) powder or alumina (Al 2 O 3 ) powder (for example, spherical) is used, and more preferably spherical silica (SiO 2 ) powder is used. Various types of silica (SiO 2 ) powders are available on the market easily and inexpensively.
또한, 본 발명에서는 세라믹 파우더의 크기, 농도 등을 제어하여 표면의 소수성 특성을 적절히 조절할 수 있다. 예를 들어 수백㎛에서 수nm에 이르는 다양한 크기와 다양한 다공성 구조, 요철 구조 및 모양을 지니는 실리카(SiO2) 파우더 종류를 이용하여 표면의 소수성 특성을 적절히 조절할 수 있다. 일 구체예로 상기 실리카(SiO2) 파우더의 크기(입경)는 200~300㎛ 정도일 수 있다. 실리카(SiO2) 파우더의 크기가 너무 작으면 코팅막 내부에 매몰되어 PDMS 표면에 요철을 형성하기 어려워질 수 있으며, 너무 크면 PDMS 표면의 거침도가 증가하여 소수성 개선에 오히려 부정적으로 작용할 가능성이 있다.
In addition, in the present invention, the hydrophobic characteristics of the surface can be appropriately controlled by controlling the size, concentration, and the like of the ceramic powder. For example, hydrophobic properties of the surface can be appropriately controlled by using a silica (SiO 2 ) powder having various sizes ranging from several hundreds of ㎛ to several nm and having various porous structures, concave-convex structures and shapes. In one embodiment, the size (diameter) of the silica (SiO 2 ) powder may be about 200 to 300 μm. If the size of the silica (SiO 2 ) powder is too small, it may be buried in the coating film to make it difficult to form irregularities on the surface of the PDMS, and if it is too large, the roughness of the surface of the PDMS may increase, which may adversely affect the improvement of the hydrophobicity.
본 단계에서, 상기 폴리디메틸실록산(PDMS) 용액 : 상기 세라믹 파우더는 10 : 1 ~ 10 : 4의 중량비로 혼합될 수 있으나, 반드시 이에 한정되는 것은 아니다. 세라믹 파우더의 함량이 너무 적으면 소수성 강화에 적합한 정도의 요철을 충분히 형성하지 못할 수 있으며, 세라믹 파우더의 함량이 너무 많으면 고분자인 PDMS의 상대적 양 부족으로 인해 코팅 자체가 어려워질 수 있다.
In this step, the polydimethylsiloxane (PDMS) solution: the ceramic powder may be mixed at a weight ratio of 10: 1 to 10: 4, but is not limited thereto. If the content of the ceramic powder is too small, it may not sufficiently form irregularities enough to enhance the hydrophobic property. If the content of the ceramic powder is too large, the coating itself may become difficult due to the relative lack of the polymer PDMS.
상기 S2) 단계는 상기 S1) 단계에서 제조된 PDMS/세라믹 파우더 혼합 코팅액을 소수성(Hydrophobicity)이 필요한 대상 표면에 코팅하는 단계이다. 이러한 혼합 코팅액의 코팅에 의해 PDMS 표면에 세라믹 파우더에 의한 미세한 요철이 형성되고, 그 결과 PDMS 고유의 화학적인 소수성 외에 구조적/입체적인 소수성이 부가되어 최종 PDMS 표면의 소수성 특성이 한층 강화된다.
The step S2) is a step of coating the PDMS / ceramic powder mixed coating solution prepared in the step S1) on the surface of the object requiring hydrophobicity. The coating of the mixed coating liquid forms fine irregularities due to the ceramic powder on the surface of the PDMS. As a result, in addition to the inherent chemical hydrophobicity of the PDMS, the structural / three-dimensional hydrophobicity is added to further enhance the hydrophobic property of the final PDMS surface.
본 단계에서, 상기 혼합 코팅액의 코팅은 45~55㎛(예컨대, 약 50㎛)의 두께로 수행될 수 있다. 즉 폴리디메틸실록산(PDMS) 코팅막 중 요철이 형성되지 않은 평탄한 부분(예컨대, 세라믹 파우더가 존재하지 않는 부분)의 두께가 45~55㎛일 수 있다. 예를 들어 실리카(SiO2) 파우더의 크기가 200~300㎛ 수준일 경우, 코팅 두께가 45㎛ 미만으로 너무 얇으면 대상 표면에 PDMS 고유의 소수성을 부여하기 어려워지거나 상대적으로 크기가 큰 세라믹 파우더의 돌출에 의해 PDMS 표면의 불규칙도가 지나치게 증가하여 최적의 표면 구조화를 형성하기 어려워질 수 있으며, 55㎛를 초과하여 너무 두꺼우면 세라믹 파우더가 코팅막 내부에 매몰되어 PDMS 표면에 요철을 형성하기 어려워질 수 있다.
In this step, the coating of the mixed coating liquid may be performed at a thickness of 45 to 55 탆 (e.g., about 50 탆). That is, the thickness of the polydimethylsiloxane (PDMS) coating film may be 45 to 55 mu m in a flat portion where no concavities and convexities are formed (for example, a portion where no ceramic powder exists). For example, when the size of the silica (SiO 2 ) powder is in the range of 200 to 300 탆, if the coating thickness is too thin to be less than 45 탆, it is difficult to impart the inherent hydrophobicity of PDMS to the surface of the object or the ceramic powder The irregularity of the surface of the PDMS may be excessively increased due to the protrusion, which may make it difficult to form an optimum surface structure. If the thickness exceeds 55 μm, the ceramic powder may be buried in the coating film, have.
상기 대상 표면은 소수성으로의 표면 개질이 필요한 임의의 표면일 수 있으며, 예를 들어 실리콘(Si), 실리카(SiO2) 또는 백금(Pt) 재질의 친수성 무기물 표면 내지 베이킹 공정에 의해 영향을 받지 않는 유기물 표면일 수 있다.The target surface can be any surface that requires the surface modification of hydrophobic to which, for example, silicon (Si), silica (SiO 2) or platinum (Pt) which is not affected by the hydrophilic mineral surface to baking of the material It can be an organic surface.
일 구체예에서, 소수성이 요구되는 대상 표면은 유리 재질로 된 것일 수 있으며, 본 발명자들은 유리 기판을 대상으로 하여 본 발명의 소수성 코팅을 수행한 결과 개질된 표면의 물에 대한 접촉각(Contact Angle; CA)이 119.0°(* PDMS만 코팅한 경우: 113.7°)로 증가함을 실험을 통해 확인하였다.
In one embodiment, the surface of the object requiring hydrophobicity may be made of a glass material. The present inventors conducted a hydrophobic coating of the present invention on a glass substrate, and found that the contact angle of the modified surface of the glass substrate with respect to water (Contact Angle; CA) was increased to 119.0 ° (* PDMS only coating: 113.7 °).
본 단계에서, 혼합 코팅액의 코팅은 대상 표면에 얇은 PDMS 코팅막을 형성할 수 있는 당분야의 일반적인 코팅방법을 특별한 제한없이 채택하여 사용할 수 있다. 예를 들어 딥-코팅(Dip-coating) 등의 방식을 통해 혼합 코팅액으로 대상 표면을 충분히 적신 후 최대한 얇아질 때까지(예컨대, 약 1시간 동안) 혼합 코팅액을 흘러내리게 하여 코팅을 수행할 수 있다.
In this step, the coating of the mixed coating liquid can be used without any particular limitation by a general coating method in the art capable of forming a thin PDMS coating film on a target surface. The coating may be performed by sufficiently wetting the object surface with the mixed coating liquid through a method such as dip-coating, for example, and then flowing the mixed coating liquid until it becomes as thin as possible (for example, for about 1 hour) .
상기 S3) 단계는 PDMS/세라믹 파우더 혼합 코팅액으로 코팅된 대상 표면을 소정의 열처리 조건으로 베이킹하여 소수성 코팅막을 대상 표면에 최종적으로 형성하는 단계이다.In the step S3), the surface of the object coated with the PDMS / ceramic powder mixed coating solution is baked under predetermined heat treatment conditions to finally form the hydrophobic coating film on the object surface.
일 구체예에서, 본 단계의 베이킹은 상기 코팅된 대상 표면을 오븐에서 베이킹하여 폴리디메틸실록산(PDMS)을 경화시키는 것일 수 있으며, 이때 상기 베이킹은 80℃ 오븐에서 1시간 동안 수행되는 것일 수 있으나, 반드시 이에 한정되는 것은 아니다.
In one embodiment, the baking of the present step may be to baking the coated target surface in an oven to cure the polydimethylsiloxane (PDMS), wherein the baking may be performed in an 80 ° C oven for 1 hour, But the present invention is not limited thereto.
본 발명에 따른 소수성 코팅막 형성방법은 소수성 내지 발수성이 요구되는 다양한 대상 표면에 광범위하게 적용될 수 있다.The hydrophobic coating film forming method according to the present invention can be widely applied to various target surfaces requiring hydrophobic to water repellency.
일 구체예로, 본 발명은 식자재 용기 또는 주방용품의 소수성 표면 개질에 사용될 수 있다. 본 발명이 사용하는 PDMS는 비교적 안전한 물질이고 실리카(SiO2) 등도 유해성이 없는 물질인바, 유리용기 등에 코팅하여 마요네즈나 케찹 등 내용물을 쉽게 떨어지게 하는 소수성 용기의 제작이 가능하다.In one embodiment, the present invention can be used for hydrophobic surface modification of food containers or kitchen utensils. The PDMS used by the present invention is a relatively safe material, and it is a material having no harmful property such as silica (SiO 2 ). It can be coated on a glass container or the like to manufacture a hydrophobic container which easily detaches contents such as mayonnaise or ketchup.
다른 구체예로, 본 발명은 점성이 있는 (수)용액을 운반하는 관의 내부 표면 개질에 사용될 수 있다. 이를 통해 용액의 운반효율이 향상되고, 그 결과 용액의 운반에 소요되는 에너지를 절감할 수 있다.In another embodiment, the present invention can be used for internal surface modification of tubes that carry a viscous (water) solution. This improves the transport efficiency of the solution, and consequently reduces the energy required to transport the solution.
그 외, 본 발명은 PDMS를 사용할 수 있는 환경(예컨대, 온도, 화학반응 조건 등)이 조성된 다양한 곳에 적용이 가능하다.
In addition, the present invention can be applied to various places where an environment (for example, temperature, chemical reaction conditions, etc.) in which PDMS can be used is provided.
이하, 실시예를 통해 본 발명을 보다 구체적으로 설명한다. 그러나 이들 실시예는 본 발명의 이해를 돕기 위한 것일 뿐 어떠한 의미로든 본 발명의 범위가 이들 실시예로 한정되는 것은 아니다.
Hereinafter, the present invention will be described more specifically by way of examples. However, these examples are provided only for the understanding of the present invention, and the scope of the present invention is not limited to these examples in any sense.
실시예 1Example 1
시판의 PDMS 용액(Mw: 약 300,000, 점도: 약 600,000 cP)에 구형 SiO2 파우더(크기: 200~300㎛)를 PDMS 용액 : SiO2 파우더 = 10 : 1의 중량비가 되도록 첨가하고, 균일하게 교반하여 PDMS/SiO2 파우더 혼합 코팅액을 제조하였다.Spherical SiO 2 powder (size: 200 to 300 μm) was added to a commercially available PDMS solution (Mw: about 300,000, viscosity: about 600,000 cP) in a weight ratio of PDMS solution: SiO 2 powder = 10: 1, To prepare a PDMS / SiO 2 powder mixed coating solution.
상기 제조된 PDMS/SiO2 파우더 혼합 코팅액을 대상 표면(유리 기판 표면 및 유리용기 내부 표면)에 충분히 적신 후, 혼합 코팅액이 충분히 얇아질 때까지 약 1시간 동안 혼합 코팅액을 흘러내리게 하였다.The prepared PDMS / SiO 2 powder mixed coating solution was sufficiently wetted on the object surface (glass substrate surface and inner surface of the glass container), and the mixed coating liquid was allowed to flow down for about 1 hour until the mixed coating liquid became thin enough.
상기 PDMS/SiO2 파우더 혼합 코팅액이 코팅된 대상 표면을 80℃ 오븐에서 1시간 동안 베이킹하여 50㎛(돌출부 제외) 두께의 소수성 코팅막을 형성하였다.
The surface of the object coated with the PDMS / SiO 2 powder mixed coating solution was baked in an oven at 80 ° C for 1 hour to form a hydrophobic coating film having a thickness of 50 μm (excluding protrusions).
실시예Example 2 2
PDMS 용액 : SiO2 파우더 = 10 : 2의 중량비로 혼합한 것을 제외하고는, 실시예 1과 동일하다.
PDMS solution: SiO 2 powder = 10: 2 by weight.
실시예 3Example 3
PDMS 용액 : SiO2 파우더 = 10 : 3의 중량비로 혼합한 것을 제외하고는, 실시예 1과 동일하다.
PDMS solution: SiO 2 powder = 10: 3 by weight.
실시예Example 4 4
PDMS 용액 : SiO2 파우더 = 10 : 4의 중량비로 혼합한 것을 제외하고는, 실시예 1과 동일하다.
PDMS solution: SiO 2 powder = 10: 4 by weight.
비교예Comparative Example
시판의 PDMS 용액(Mw: 약 300,000, 점도: 약 600,000 cP)을 대상 표면(유리 기판 표면)에 충분히 적신 후, PDMS 용액이 충분히 얇아질 때까지 약 1시간 동안 PDMS 용액을 흘러내리게 하였다.After sufficiently wetting a commercially available PDMS solution (Mw: about 300,000, viscosity: about 600,000 cP) on the surface of the object (glass substrate surface), the PDMS solution was allowed to flow down for about 1 hour until the PDMS solution became thin enough.
상기 PDMS 용액이 코팅된 대상 표면을 80℃ 오븐에서 1시간 동안 베이킹하여 50㎛ 두께의 소수성 코팅막을 형성하였다.
The surface of the object coated with the PDMS solution was baked in an oven at 80 ° C for 1 hour to form a 50 μm thick hydrophobic coating film.
실험예Experimental Example 1: One: 접촉각Contact angle 변화 측정 Change measurement
상기 비교예 및 실시예 2에 따라 처리된 유리 기판 표면에 대해 탈이온수 액적의 접촉각을 측정하여 도 1에 나타내었다.The contact angle of deionized water droplets on the surface of the glass substrate treated according to the above Comparative Examples and Example 2 was measured and shown in Fig.
도 1에서 보듯이, PDMS만 코팅된 유리 기판의 경우의 접촉각이 113.7°인 반면, 본 발명에 따라 표면 구조화된 PDMS-코팅 유리 기판은 119.0°의 접촉각을 나타내어 그 소수성 특성이 더욱 강화되었다.
As shown in FIG. 1, the contact angle of the PDMS-coated glass substrate was 113.7 °, while the PDMS-coated glass substrate according to the present invention exhibited a contact angle of 119.0 °, thereby further enhancing the hydrophobic property.
실험예Experimental Example 2: 유리용기의 소수성 성능 시연 2: Demonstration of hydrophobic performance of glass containers
일반 유리용기 및 상기 실시예 2에 따라 처리된 유리용기에 시판의 스파게티 소스를 채운 후 다른 용기에 옮겨 부어 스파게티 소스가 쉽게 분리되는지를 확인하였다.A commercial glass container and a glass container treated according to Example 2 were filled with a commercially available spaghetti sauce and transferred to another container to confirm that spaghetti sauce was easily separated.
도 2에서 보듯이, 본 발명에 따라 표면 구조화된 PDMS-코팅 유리용기는 스파게티 소스가 매우 쉽게 떨어져 나가 일반 유리용기 대비 극명한 소수성 특성을 나타내었다.
As shown in FIG. 2, the PDMS-coated glass container according to the present invention has a surface-structured PDMS-coated glass container with a very easily detached spaghetti sauce and exhibits a remarkable hydrophobic property compared to a general glass container.
Claims (17)
S2) 제조된 혼합 코팅액을 소수성(Hydrophobicity)이 요구되는 대상 표면에 코팅하는 단계; 및
S3) 코팅된 대상 표면을 베이킹하는 단계;를 포함하며,
상기 코팅된 폴리디메틸실록산(PDMS)의 표면에는 상기 세라믹 파우더에 의해 미세한 요철이 형성되어, 폴리디메틸실록산(PDMS) 표면의 소수성이 강화되는 것임을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
S1) adding a ceramic powder to a polydimethylsiloxane (PDMS) solution and uniformly stirring to prepare a mixed coating solution containing polydimethylsiloxane (PDMS) and a ceramic powder;
S2) coating the prepared mixed coating solution on a surface of the object requiring hydrophobicity; And
S3) baking the coated target surface,
Characterized in that fine unevenness is formed on the surface of the coated polydimethylsiloxane (PDMS) by the ceramic powder to enhance hydrophobicity of the polydimethylsiloxane (PDMS) surface.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 폴리디메틸실록산(PDMS) 용액 : 상기 세라믹 파우더는 10 : 1 ~ 10 : 4의 중량비로 혼합되는 것임을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
The method according to claim 1,
The polydimethylsiloxane (PDMS) solution: the ceramic powder is mixed in a weight ratio of 10: 1 to 10: 4.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 폴리디메틸실록산(PDMS)의 중량평균분자량(Mw)은 100,000~500,000이고, 상기 폴리디메틸실록산(PDMS) 용액의 점도(25℃)는 100~1,000,000 cP인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
The method according to claim 1,
Wherein the polydimethylsiloxane (PDMS) has a weight average molecular weight (Mw) of 100,000 to 500,000 and a polydimethylsiloxane (PDMS) solution has a viscosity (25 ° C) of 100 to 1,000,000 cP.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 세라믹 파우더는 실리카(SiO2), 알루미나(Al2O3), 산화티탄(TiO2), 산화마그네슘(MgO), 질화규소(Si3N4), 질화알루미늄(AlN) 및 질화붕소(BN) 파우더 중에서 선택된 1종 이상인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
The method according to claim 1,
The ceramic powder is silica (SiO 2), alumina (Al 2 O 3), titanium oxide (TiO 2), magnesium oxide (MgO), silicon nitride (Si 3 N 4), aluminum nitride (AlN) and boron nitride (BN) And a powder.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 세라믹 파우더는 실리카(SiO2) 파우더인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
5. The method of claim 4,
The ceramic powder is characterized in that silica (SiO 2) powder in,
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 세라믹 파우더는 구형 실리카(SiO2) 파우더인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
6. The method of claim 5,
Wherein the ceramic powder is a spherical silica (SiO 2 ) powder.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 세라믹 파우더는 구형 알루미나(Al2O3) 파우더인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
5. The method of claim 4,
Wherein the ceramic powder is spherical alumina (Al 2 O 3 ) powder.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 코팅된 폴리디메틸실록산(PDMS) 코팅막 중 요철이 형성되지 않은 부분의 두께는 45~55㎛인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
The method according to claim 1,
Wherein a thickness of a portion of the coated polydimethylsiloxane (PDMS) coating film where unevenness is not formed is 45 to 55 占 퐉.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 코팅된 폴리디메틸실록산(PDMS) 코팅막 중 요철이 형성되지 않은 부분의 두께는 50㎛인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
9. The method of claim 8,
Characterized in that the thickness of a portion of the coated polydimethylsiloxane (PDMS) coating film where unevenness is not formed is 50 占 퐉.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 소수성이 요구되는 대상 표면은 유리 재질인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
The method according to claim 1,
Characterized in that the object surface to which the hydrophobic property is required is a glass material.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 소수성 코팅막이 형성된 대상 표면의 물에 대한 접촉각은 119.0°인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
11. The method of claim 10,
Wherein the contact angle of the object surface on which the hydrophobic coating film is formed with respect to water is 119.0 DEG.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 소수성이 요구되는 대상 표면은 식자재 용기 또는 주방용품의 표면인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
The method according to claim 1,
Characterized in that the object surface for which hydrophobicity is required is a surface of a food material container or a kitchen utensil.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 소수성이 요구되는 대상 표면은 점성 수용액을 운반하는 관의 내부 표면인 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
The method according to claim 1,
Characterized in that the object surface to which the hydrophobic property is required is the inner surface of the tube which carries the viscous aqueous solution.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 혼합 코팅액으로 상기 대상 표면을 적신 후 최대한 얇아질 때까지 혼합 코팅액을 흘러내리게 하여 코팅을 수행하는 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
The method according to claim 1,
Coating the mixed coating liquid with the mixed coating liquid to wet the target surface and then flowing the mixed coating liquid until the coating liquid becomes as thin as possible.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
딥-코팅(Dip-coating)을 이용하여 코팅을 수행하는 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
15. The method of claim 14,
Characterized in that the coating is carried out using dip-coating.
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 혼합 코팅액으로 상기 대상 표면을 적신 후 1시간 동안 혼합 코팅액을 흘러내리게 하여 코팅을 수행하는 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
15. The method of claim 14,
Coating the mixed coating liquid with the mixed coating liquid for one hour after wetting the target surface,
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
상기 코팅된 대상 표면을 베이킹하여 폴리디메틸실록산(PDMS)을 경화시키는 것을 특징으로 하는,
폴리디메틸실록산(PDMS) 표면의 구조화를 통한 소수성 코팅막 형성방법.
The method according to claim 1,
Characterized in that the coated object surface is baked to cure the polydimethylsiloxane (PDMS)
A method for forming a hydrophobic coating film by structuring a polydimethylsiloxane (PDMS) surface.
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