Modified Cellulose Fiber Adhesive Composition for High-Shear Metal Bonding
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Solution Overview
Problem
Existing adhesive compositions do not provide sufficient mechanical strength, particularly in bonding metal members, and are not environmentally friendly.
Innovation Solution
An adhesive composition comprising modified cellulose fibers with a cellulose I crystal structure, an average fiber length of 1000 nm or less, and an average fiber diameter of 1 nm to 300 nm, combined with a resin, which includes anionically modified cellulose fibers bound with hydrocarbon, silicone, or alkylene oxide chains, enhancing adhesion and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional adhesive compositions are used, then bonding is achieved, but mechanical strength (particularly shearing adhesive strength) is insufficient
Solution Approach 1:
The patent uses composite materials by combining modified cellulose fibers (with specific nanoscale dimensions and crystal structure) with resin to create an adhesive composition that achieves both high mechanical strength and reliable adhesive performance. The composite structure leverages the strength of cellulose fibers and the bonding properties of resin.
Solution Approach 2:
The patent applies parameter changes by specifying precise dimensional parameters for cellulose fibers (average fiber length ≤1000 nm, average fiber diameter 1-300 nm) and structural parameters (cellulose I crystal structure) to optimize the adhesive composition for maximum mechanical strength and bonding reliability.
2Object-affected harmful factors
If biomass-derived cellulose fibers are used, then environmental friendliness is improved, but adhesive performance may be compromised
Solution Approach 1:
The patent transforms natural cellulose fibers into high-performance adhesive components by changing their physical parameters to nanoscale dimensions (length ≤1000 nm, diameter 1-300 nm) and maintaining the cellulose I crystal structure, thereby achieving both environmental friendliness and superior adhesive performance.
Solution Approach 2:
The patent creates a composite material system combining modified cellulose fibers with resin, where the cellulose component provides environmental sustainability and the resin matrix ensures reliable adhesive performance, achieving both ecological and functional requirements.
Data Source
AI summary
The present invention relates to a composition containing (a) modified cellulose fibers having a cellulose I crystal structure, an average fiber length of 1000 nm or less, and an average fiber diameter of 1 nm or more and 300 nm or less; and (b) a resin. According to the present invention, a composition having excellent mechanical strength such as shearing adhesive strength can be provided. The composition of the present invention described above can be utilized in structural adhesion of vehicle assembly products and the like.