Modified Nanoparticles for VOC Emission Reduction in Wood Panels
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Solution Overview
Problem
Wood-based panels, particularly OSB panels, emit high levels of volatile organic compounds (VOCs) such as aldehydes and terpenes during manufacturing and use, posing health hazards and ecological disadvantages, with existing solutions like zeolites requiring high amounts for effective VOC reduction.
Innovation Solution
Modified nanoparticles with a silane layer are integrated into the wood fiber matrix, utilizing functional groups that react with aldehydes and terpenes to reduce VOC emissions, specifically designed to bind with aldehydes and terpenes, thereby minimizing their release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If zeolites are used to reduce VOC emissions, then VOC emissions are reduced, but large amounts of zeolite are required
Solution Approach 1:
The patent changes the physical and chemical parameters of the nanoparticles by modifying their surface with functional groups (amino, hydroxyl, carboxyl). This modification transforms ordinary nanoparticles into highly effective VOC-binding particles that require much smaller quantities compared to unmodified zeolites, directly resolving the contradiction between emission reduction effectiveness and material quantity required
Solution Approach 2:
The patent creates a composite material system consisting of nanoparticles with specific surface modifications (silane coatings with functional groups). This composite approach combines the advantages of nanoparticle high surface area with the chemical reactivity of functional groups, achieving superior VOC binding per unit mass compared to conventional zeolites
2Object-generated harmful factors
If modified nanoparticles are used to reduce VOC emissions, then VOC emissions are significantly reduced, but the nanoparticle modification process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-modifying the nanoparticle surfaces with functional groups before incorporating them into the wood-based panel. The silane coating and functional group attachment are performed in advance during nanoparticle synthesis, so that when the particles are added to the panel, they are already optimized for VOC binding, simplifying the overall application process despite the initial modification complexity
Solution Approach 2:
The patent uses silane compounds as intermediary substances that bridge the nanoparticle core and the functional groups. The silane layer acts as a mediator that facilitates the attachment of amino, hydroxyl, or carboxyl groups to the nanoparticle surface, making the modification process more controllable and efficient
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 use of modified nanoparticles significantly reduces VOC emissions, achieving a 66% reduction in aldehydes like hexanal and 45% reduction in terpenes like 3-carene, improving indoor air quality and ecological sustainability of wood-based panels.
Implementation Method 1
nanoparticles containing at least one compound of the general formula (I) R8SiX(4-a) (I), wherein X h, oh or a hydrolyzable rest is selected from the group halogen, alkoxy, carboxy, amino, monoalkylamino or dialkylamino, aryloxy, acyloxy, alkyl carbonyl, are modified, whereby R a non-hydrolidable organic rest... and wherein R has at least one functional group Q selected from a group containing an epoxy, hydroxy, ether, amino, monoalkylamino, dialkylamino, substituted and unsubstituted anilino, amide, carboxy, alkynyl -, acrylic, acryloxy, methacrylic, methacryloxy, mercapto, cyano, aldehyde, alkylcarbonyl, acid anhydride and/or phosphoric acid group
Data Source
AI summary
Use of modified nanoparticles in wooden composite for reducing the emission of volatile organic compounds, is claimed, where the nanoparticle is modified with at least one silicon compound (I). Use of modified nanoparticles in wooden composite for reducing the emission of volatile organic compounds, is claimed, where the nanoparticle is modified with at least one silicon compound of formula ((R1) aSiX 4 - a) (I). X : H, OH or a hydrolyzable group consisting of halo, alkoxy, carboxy, amino, monoalkylamino, dialkylamino, aryloxy, acyloxy or alkylcarbonyl; R : a nonhydrolyzable organic group consisting of alkyl, aryl, alkenyl, alkynyl, cycloalkyl or cycloalkenyl (all optionally substituted and optionally interrupted by -O- or -NH-), where R exhibits a functional group Q; Q : epoxide, OH, ether, amino, monoalkylamino, dialkylamino, optionally substituted anilino, amide, carboxy, alkynyl, acryl, acryloxy, methacryl, methacryloxy, mercapto, CN, alkoxy, isocyanato, aldehyde, alkylcarbonyl, acid anhydride and/or phosphoric acid; and a : 1-3. Independent claims are included for: (1) producing the wooden composite with a reduced emission of volatile organic compounds comprising (a) manufacturing wood chips from a timber, (b) chipping the wood chips to wood flour, (c) temporary storing the wood flour, (d) drying the wood flour, (e) sorting or screening wood flour according to the size of the wood chips, (f) optionally further grinding the wood flour, (g) depositing wood flour on a conveyor belt by wind and/or wind throw direction to form litter mat and (h) pressing the conveyor belt arranged on the wood flour, where at least one suspension comprising the modified nanoparticles is added during or after the steps (b)-(h), and the suspension is in the form of an aqueous solution and contains at least 20 wt.% of the modified nanoparticle; and (2) the wooden composite manufactured by the above process.