Silane Monomer Coating for Porous Substrate Hydrophobicity

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Solution Overview

Problem

Existing methods fail to effectively impart hydrophobic properties to substrates, particularly porous materials like cellulose and silicon, which limits their applications in controlled liquid condensation and delivery.

Innovation Solution

A method involving the bonding and polymerization of silane monomers onto the substrate surface, controlled through parameters such as temperature, reaction time, and water content, to form surface-attached hydrophobic particles or films, enhancing the substrate's hydrophobicity and modifying its surface roughness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing methods are used to impart hydrophobic properties to substrates, then the substrate surface can be modified, but the methods fail to effectively achieve hydrophobic properties particularly on porous materials like cellulose and silicon

Engineering Contradiction:

Improvehydrophobic property effectivenessVSAvoidapplicability to porous materials

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent employs chemical vapor deposition at controlled temperatures (25-100°C) to optimize evaporation and reaction rates, transforming hydrophilic substrates into hydrophobic surfaces through parameter control of temperature, pressure, and reaction conditions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates composite structures by bonding silane monomers to substrate surfaces and polymerizing them to form surface-attached hydrophobic particles, combining the substrate material with silane polymer coatings to achieve enhanced hydrophobicity

Inventive Principle:

Principle #40Composite materials

2Reliability

If silane monomers are bonded and polymerized onto the substrate surface to form hydrophobic particles, then hydrophobicity is enhanced, but the process complexity increases with multiple parameters to control

Engineering Contradiction:

Improvehydrophobicity enhancementVSAvoidprocess parameter control

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The silane monomers self-assemble and self-polymerize on the substrate surface through chemical vapor deposition, where the reaction process automatically controls particle formation and hydrophobicity development without requiring complex external intervention

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent simplifies process control by optimizing temperature ranges (25-100°C) and pressure conditions to naturally control evaporation and reaction rates, reducing the complexity of parameter management while achieving reliable hydrophobicity enhancement

Inventive Principle:

Principle #35Parameter changes

3Productivity

If chemical vapor deposition is performed at higher temperatures to optimize reaction rate, then bonding efficiency improves, but the evaporation rate control becomes more difficult

Engineering Contradiction:

Improvebonding efficiencyVSAvoidevaporation rate control

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent identifies and implements an optimal temperature window (25-100°C) where both evaporation and reaction rates are balanced, allowing efficient bonding while maintaining controllable evaporation through parameter optimization rather than extreme conditions

Inventive Principle:

Principle #35Parameter changes

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 successfully transforms hydrophilic substrates into hydrophobic materials with improved water contact angles, achieving enhanced hydrophobicity and controlled liquid interaction, suitable for applications in liquid condensation and delivery.

Implementation Method 1

bonding may comprise performing chemical vapor deposition

Methodology Applied

Scientific EffectChemical vapor deposition: Chemical Vapour Deposition

Implementation Method 2

polymerizing the silane monomers to form surface-attached hydrophobic particles comprising silane polymers

Methodology Applied

Scientific EffectPolymerization:

Implementation Method 3

enhancing a surface of a substrate may comprise bonding silane monomers onto the surface of the substrate, and polymerizing the silane monomers to form surface-attached hydrophobic particles

Methodology Applied

Scientific EffectHydrophobic interaction: Hydrophobe

Data Source

PatentUS10604677B2Fabrication of micro- and nano-particle coated materials

Publication Date: 2020.03.31 MASSACHUSETTS UNIV OF

AI summary

According to various aspects and embodiments, materials having a modified surface to increase hydrophobicity and methods of making the same are disclosed. In accordance with one or more aspects, a method of enhancing a surface of a substrate may comprise bonding silane monomers onto the surface of the substrate, and polymerizing the silane monomers to form surface-attached hydrophobic particles comprising silane polymers.