Article with super-hydrophobic surface and preparation method thereof
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Solution Overview
Problem
Existing methods for creating super-hydrophobic surfaces on textiles, such as using layered double hydroxides, face challenges like high reaction temperatures, structural weakening of textiles, environmental unfriendliness, and poor washing durability, which limit their application in durable textiles and water repellency.
Innovation Solution
In situ formation of hexadecyl trimethoxy silane modified Mg—Al layered double hydroxides on the surface of articles, using a method involving the immersion of articles in a solution with Mg(NO3)2.6H2O and urea, followed by heating and subsequent modification with NH4OH and hexadecyl trimethoxy silane, to achieve a super-hydrophobic surface with improved hydrophobicity and washing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If layered double hydroxide is formed by hydrolysis, coprecipitation, reconstruction, anion-exchange reactions, urea methods, sol-gel techniques, microwave, ultrasound or hydrothermal procedures, then hydrophobicity of the article surface is improved, but reaction temperature and pressure are high which weakens textile structure and is not environmental friendly
Solution Approach 1:
The invention changes the reaction parameters by using a low-temperature hydrolysis process at pH 2-7 and temperature below 100°C, replacing the conventional high-temperature and high-pressure methods. This parameter change enables the formation of hydrophobic layered double hydroxide on textile surfaces without weakening the textile structure or requiring environmentally harmful conditions
Solution Approach 2:
The invention introduces a silane coupling agent as an intermediary substance that mediates between the layered double hydroxide and the textile surface. This intermediary enables strong bonding between the hydrophobic coating and the textile substrate at low temperatures, resolving the contradiction between achieving high hydrophobicity and maintaining textile integrity
2Reliability
If layered double hydroxide is formed on the surface of the article, then hydrophobicity is improved, but washing durability is poor
Solution Approach 1:
The silane coupling agent serves as a durable intermediary that chemically bonds the layered double hydroxide to the textile surface. This intermediary creates a strong, permanent attachment that withstands washing processes, thereby achieving both high hydrophobicity and excellent washing durability
Solution Approach 2:
The invention creates a composite material system consisting of textile substrate, silane coupling agent, and layered double hydroxide. This composite structure combines the hydrophobic properties of the layered double hydroxide with the durability and bonding capability of the silane coupling agent, achieving both improved hydrophobicity and washing durability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method results in a surface with a water contact angle of not less than 130°, maintaining high hydrophobicity and water repellency even after washing, making it suitable for durable textile applications and water treatment technologies.
Implementation Method 1
The layered double hydroxide (LDH) can be formed by the methods of, such as hydrolysis, coprecipitation
Implementation Method 2
The layered double hydroxide (LDH) can be formed by the methods of, such as hydrolysis, coprecipitation
Implementation Method 3
in situ formation of a plurality of hexadecyl trimethoxy silane modified Mg—Al layered double hydroxides
Implementation Method 4
The article with a super-hydrophobic surface has a high hydrophobicity, a desired water repellency
Data Source
AI summary
The invention is to provide an article with a super-hydrophobic surface and a method for preparing the same. The article with a super-hydrophobic surface provided by in situ formation of a plurality of hexadecyl trimethoxy silane modified Mg—Al layered double hydroxides on the surface of the article. The water contact angle of the article is not less than 130°.