Treated Cellulosic Material for Termite Resistance and Dimensional Stability
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Solution Overview
Problem
Current preservation methods for cellulosic materials like wood fail to adequately address termite resistance and dimensional stability, leading to issues such as splitting, warping, and degradation due to water absorption and insect damage.
Innovation Solution
A treated cellulosic material is developed by impregnating a cellulosic material with a polymer comprising an olefin-carboxylic acid copolymer and a modifying agent comprising an epoxy resin, which enhances hydrophobicity, resistance to insects and fungi, and improves dimensional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional preservative treatments are applied to wood, then mold resistance and insect resistance are improved, but water absorption and dimensional instability persist
Solution Approach 1:
The patent applies composite materials by combining olefin-carboxylic acid copolymer with epoxy resin to create a treating agent that provides both mold/insect resistance and dimensional stability. The composite nature of the treating agent allows it to simultaneously address multiple degradation mechanisms that single agents cannot prevent.
Solution Approach 2:
The patent changes the chemical parameters of the treating agent by using olefin-carboxylic acid copolymer with specific functional groups that can chemically interact with wood components. This chemical parameter change enables the agent to bind to wood cellulose and hemicellulose, providing dimensional stability while maintaining bioprotection.
2Reliability
If conventional preservative treatments are applied to wood, then insect resistance is improved, but water absorption and swelling persist
Solution Approach 1:
The composite treating agent combines the biocidal properties of olefin-carboxylic acid copolymer with the water-repellent characteristics of epoxy resin, creating a dual-function material that simultaneously provides insect resistance and reduces water absorption capacity of the wood.
Solution Approach 2:
The treating agent modifies local properties of wood by penetrating into cell walls and pores, creating zones of enhanced hydrophobicity and bioprotection within the wood structure. This local modification prevents water ingress at the cellular level while maintaining overall wood integrity.
3Duration of action of stationary object
If conventional preservative treatments are applied to wood, then durability is improved, but internal stresses and warping persist
Solution Approach 1:
The chemical composition of the treating agent is changed to include epoxy resin that can cross-link with wood components, creating a stable chemical structure that resists the formation of internal stresses during drying and service conditions, thereby preventing warping while maintaining durability.
4Reliability
If naturally durable wood species are used, then termite resistance is improved, but availability and cost are worsened
Solution Approach 1:
The patent extracts the termite resistance property from rare durable wood species and transfers it to common wood species through chemical treatment with olefin-carboxylic acid copolymer and epoxy resin. This makes termite resistance available in abundant, economical wood materials rather than being limited to scarce natural species.
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 treated material exhibits significant water repellency and increased hardness, reducing internal stresses and enhancing durability, thereby providing improved resistance to termite damage and dimensional stability.
Implementation Method 1
Pressure treatment typically allows the treating agent to penetrate throughout the porous structure of the cellulosic material
Implementation Method 2
The treated material exhibits significant water repellency
Data Source
AI summary
The present disclosure describes a treated cellulosic material comprising a cellulosic material having a porous structure defining a plurality of pores, at least a portion of the pores containing a treating agent comprising a polymer comprising an olefin-carboxylic acid copolymer; and a modifying agent comprising an epoxy.