Structured Organic Film Melt Formulation for Solvent Resistance
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Solution Overview
Problem
Conventional covalent organic frameworks (COFs) are typically powders with limited control over molecular-level structure and poor solvent resistance, lacking enhanced characteristics for applications such as coatings and electronic devices.
Innovation Solution
A process for preparing structured organic films (SOFs) comprising a plurality of segments and linkers arranged as a covalent organic framework, involving a melt-reaction step to form a high molecular weight pre-SOF, which is then deposited and dried to create a solvent-resistant film with improved viscosity and shelf life, enabling better control over film quality and properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional COF synthesis methods are used, then high porosity and low density are achieved, but molecular-level structure control is poor and solvent resistance is limited
Solution Approach 1:
The patent applies preliminary action by forming a pre-SOF (pre-structured organic framework) through melt reaction before final film formation. This pre-formed framework structure is then incorporated into the film during deposition, ensuring molecular-level structure is established before the film is subjected to solvent exposure or application conditions, thereby achieving both structural control and solvent resistance
Solution Approach 2:
The patent utilizes parameter changes by controlling the melt reaction temperature and molecular weight of the pre-SOF to optimize the balance between structural order and film properties. By adjusting these parameters, the patent achieves enhanced molecular-level structure control while maintaining solvent resistance and film quality
2Manufacturing precision
If polymerization processes are used, then long linear chains are formed, but molecular-level patterning is random and amorphous
Solution Approach 1:
The patent applies segmentation by dividing the COF structure into discrete molecular building blocks with specific functional groups. These segmented building blocks are designed to assemble into ordered patterns through controlled melt reaction, rather than forming random polymer chains. The segmentation enables precise molecular-level patterning while maintaining structural order
Solution Approach 2:
The patent uses composite materials by combining molecular building blocks with specific functional groups to create a hybrid structure that exhibits both ordered patterning and structural stability. The composite nature of the pre-SOF allows for controlled molecular arrangement while maintaining compositional stability
3Reliability
If high molecular weight pre-SOF is formed through melt reaction, then solvent resistance and shelf life are improved, but process complexity increases
Solution Approach 1:
The patent merges the pre-SOF formation step with the film deposition process. The melt reaction that forms the high molecular weight pre-SOF is integrated into the coating formulation, allowing the structured organic framework to be formed and deposited in a unified process. This merging reduces overall process complexity while maintaining solvent resistance and shelf life benefits
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 process results in SOFs with enhanced solvent resistance, improved film quality, and extended shelf life, suitable for various applications including coatings and electronic devices, offering advantages over conventional COFs in terms of structural control and performance.
Implementation Method 1
heating the mixture to form a homogeneous liquid comprising a pre-SOF
Implementation Method 2
drying the wet layer to form a dry SOF from the pre-SOF
Data Source
AI summary
Processes for preparing structured organic films (SOFs) comprising a plurality of segments and a plurality of linkers arranged as a covalent organic framework. The processes for preparing structured organic film may include mixing a plurality of molecular building blocks each comprising a segment and a number of functional groups to form a mixture of molecular building blocks; heating the mixture to form a homogeneous liquid comprising pre-SOFs; depositing the homogeneous liquid comprising pre-SOFs as a wet layer; and drying the wet layer to form a dry SOF from the pre-SOFs.