Silk Peptide Nanopolymer Coating for Formaldehyde-Free Wrinkle Recovery
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Solution Overview
Problem
Current wrinkle-resistant finishing techniques for cotton materials, such as crosslinking with formaldehyde, face issues like formaldehyde release and strength loss, while alternative methods using natural proteinaceous materials have limited effectiveness in achieving high wrinkle recovery angles without harmful agents.
Innovation Solution
The development of a silk peptide hybrid system that utilizes silk peptides and building block monomers for textile finishing, eliminating the need for N-methylol agents like formaldehydes, through a process involving degumming, dissolution, and polymerization with soft or hard segment monomers, resulting in a peptide/building block emulsion applied to substrates for improved wrinkle resistance and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If crosslinking via formaldehyde is used to achieve wrinkle-resistant properties, then wrinkle recovery angle is improved, but formaldehyde release and strength loss occur
Solution Approach 1:
The patent extracts and eliminates formaldehyde and other harmful N-methylol agents from the wrinkle-resistant finishing system. The invention uses a formaldehyde-free crosslinking mechanism where silk peptide and its derivatives directly crosslink with cellulosic fibers through carboxyl groups, removing the harmful formaldehyde component while maintaining wrinkle recovery performance.
Solution Approach 2:
The patent changes the chemical parameters of the crosslinking system by replacing formaldehyde-based crosslinking agents with silk peptide-based crosslinking agents. The silk peptide contains carboxyl groups that form crosslinks with cellulose fibers through different chemical mechanisms, changing the crosslinking chemistry from formaldehyde-dependent to silk peptide-dependent, thereby eliminating formaldehyde release while achieving comparable or improved wrinkle recovery angles.
2Reliability
If crosslinking via formaldehyde is used to achieve wrinkle-resistant properties, then wrinkle recovery angle is improved, but tear strength is reduced
Solution Approach 1:
The patent changes the crosslinking chemistry from formaldehyde-based to silk peptide-based crosslinking. The silk peptide crosslinking system uses carboxyl groups that form crosslinks with cellulose fibers through mechanisms that are less detrimental to fiber strength. This parameter change in crosslinking chemistry maintains wrinkle recovery angle while preserving tear strength, as the silk peptide crosslinks provide structural support without the strength-loss side effects of formaldehyde crosslinking.
3Object-affected harmful factors
If natural proteinaceous material is used to minimize environmental hazard, then formaldehyde release is reduced, but wrinkle-resistant effectiveness is limited
Solution Approach 1:
The patent creates a composite material system combining silk peptide (natural proteinaceous material) with building block monomers to form a hybrid crosslinking agent. This composite approach enhances the wrinkle-resistant effectiveness beyond what natural proteinaceous materials alone can achieve. The silk peptide provides the natural, formaldehyde-free base while the building block monomers contribute additional crosslinking functionality and structural properties, resulting in a synergistic effect that achieves high wrinkle recovery angles without formaldehyde release.
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
This method enhances wrinkle recovery angles and maintains tear strength without the use of harmful agents, providing a soft feel and improved properties like elasticity, while reducing the risk of formaldehyde exposure, as demonstrated in examples showing increased wrinkle recovery and comparable tear strength to untreated controls.
Implementation Method 1
polymerizing the peptide structure with the building block to form a peptide/building block nanopolymer
Data Source
AI summary
The present invention relates a method of making a coated cellulosic textile, whereby a silk peptide is polymerized with a building block to develop a silk peptide/building block nanoparticle, said nanoparticle then being used to coat the textile. The resultant textile exhibits a high level of wrinkle recovery angle and/or tear strength, all without the use of N-methylol compounds, including ureas and formaldehydes.