Nanofibre Adhesive Sheet for Nano-Element Binding
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Solution Overview
Problem
Existing methods for creating layered materials with micro- and/or nanostructured layers in resins, such as thermosetting acrylic and thermoplastic resins, face challenges in achieving a robust, homogeneous binding of nano-elements to a substrate and are difficult to process industrially.
Innovation Solution
A process involving a substrate coated with an adhesive sheet containing a layer of nanofibre nonwoven fabric, which is then heated to induce a phase transition and create micro- and/or nanostructured accumulations of resin. This process allows for the precise positioning and reliable bonding of nano-elements on the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrospinning is used to make nanofibre nonwoven fabric, then nanofibres can be produced, but the layer obtained is particularly delicate and difficult to process
Solution Approach 1:
The patent combines nanofibre nonwoven fabric with a resin matrix to form a composite adhesive sheet. The resin reinforces the delicate nanofibre structure, making it processable while retaining the nanofibre properties. This composite approach allows the material to be handled and applied without deteriorating the nanofibre network.
Solution Approach 2:
The patent utilizes phase transition of the resin through heating to transform the adhesive sheet from a processable state to a bonded state. By changing the temperature parameter, the resin transitions from solid to molten state for application, then solidifies to lock the nanofibre structure in place, resolving the processing difficulty.
2Reliability
If nanofibre nonwoven fabric is used as adhesive, then adhesion can be achieved, but homogeneous distribution and firm binding of nano-elements to substrate is difficult
Solution Approach 1:
The resin acts as an intermediary material between the nanofibre nonwoven fabric and the substrate. It distributes the bonding stress uniformly across the surface and provides a homogeneous matrix that embeds and secures nano-elements, achieving both reliable adhesion and uniform distribution.
Solution Approach 2:
The patent creates a homogeneous resin matrix that uniformly distributes nanofibres and nano-elements throughout the adhesive layer. This homogeneous structure ensures consistent bonding properties and uniform positioning of functional nano-elements across the entire substrate surface.
3Volume of moving object
If delicate nanofibre web is produced, then nanoscale structure is achieved, but subsequent processing leads to high number of waste
Solution Approach 1:
The resin matrix serves as a protective cushion for the delicate nanofibre web during handling and processing. It prevents mechanical damage and deterioration of the nanofibre structure before and during application, reducing material waste from breakage or degradation.
Solution Approach 2:
By forming a composite where the resin provides mechanical strength and the nanofibres provide functional properties, the patent creates a robust material that can be processed without losing nanofibre integrity, thereby minimizing waste from failed processing attempts.
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 enables a firm, homogeneous binding of nano-elements to the substrate, facilitating industrial implementation and offering applications such as ice-repellent coatings and self-sanitizing surfaces.
Implementation Method 1
heating the assembly comprising the substrate coated by the adhesive sheet for a time interval sufficient to bring the layer of nanofibre nonwoven fabric to a heating temperature sufficient to cause a phase transition of the layer of nanofibre nonwoven fabric
Data Source
AI summary
A process is disclosed for making a layered material comprising a micro- and/or nanostructured layer in a resin, including providing a substrate as a first layer; providing an adhesive sheet comprising at least one layer of nanofibre nonwoven fabric of a solidified resin; at least partially coating the substrate with the adhesive sheet; and heating the assembly comprising the substrate and adhesive sheet for a time interval (t) sufficient to bring the layer of nanofibre nonwoven fabric to a heating temperature (T) sufficient to cause a phase transition of the layer of nanofibre nonwoven fabric, to generate a micro- and/or nanostructure of localized accumulations of thermosetting acrylic resin and/or thermoplastic resin. The layer of nanofibre nonwoven fabric in thermosetting acrylic resin and/or thermoplastic resin of the adhesive sheet is supplemented with at least a plurality of nano-elements in a material different from the resin of the adhesive sheet.