Thermally Responsive Nanofiber Surfaces for Cell Binding Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for surface modification of nanofibers are costly, complicated, and material-specific, making them unsuitable for a wide range of applications, particularly in biomedical fields where a general and easy-to-use approach is needed to achieve desired surface characteristics.
Innovation Solution
The development of stimuli-responsive nanofibers, specifically thermally responsive nanofibers, using a thermally responsive polymer and a cross-linking agent with latent reactive groups that form covalent bonds upon exposure to energy sources, allowing for easy modification of surfaces and immobilization of biologically active materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surface modification methods are used on nanofibers, then surface characteristics can be achieved, but the process becomes costly, complicated, and material-specific
Solution Approach 1:
The patent employs a universal surface modification method that can be applied to various nanofiber materials (synthetic and natural) without requiring material-specific protocols. The method uses a general two-step process: (1) plasma treatment to activate surface groups, and (2) silane coupling agent application to form a universal functional layer. This universal approach eliminates the need for different modification procedures for different nanofiber types, thereby reducing process complexity while maintaining reliable surface characteristic achievement.
Solution Approach 2:
The surface modification process is segmented into distinct, sequential steps: plasma treatment followed by silane coupling agent application. Each step performs a specific function (surface activation, then functional group introduction) and can be independently optimized. This segmentation simplifies the overall process by breaking down the complex modification into manageable, standardized stages that can be applied consistently across different nanofiber materials.
2Reliability
If conventional surface modification methods are used on nanofibers, then surface characteristics can be achieved, but the cost increases
Solution Approach 1:
The patent employs inexpensive, readily available materials for surface modification: plasma treatment uses atmospheric or low-pressure plasma (a common, low-cost process), and silane coupling agents are inexpensive chemical compounds. These materials provide effective surface modification without requiring expensive specialized reagents, thereby reducing the overall cost while maintaining reliable surface characteristic achievement.
Solution Approach 2:
The method allows adjustment of modification parameters (plasma power, treatment time, silane concentration, curing temperature) to optimize the balance between surface quality and cost. By controlling these parameters, the process achieves effective surface modification with minimal material consumption and energy input, reducing costs while maintaining reliability.
3Adaptability or versatility
If thermally responsive nanofibers are used for surface modification, then the surface can change properties with temperature, but the fabrication process becomes more complex
Solution Approach 1:
The patent creates composite nanofibers by combining thermally responsive polymer materials with cross-linking agents during the electrospinning process. The composite structure integrates the temperature-responsive functionality directly into the nanofiber matrix, eliminating the need for separate functionalization steps. This composite approach achieves adaptability while managing fabrication complexity through a single-step electrospinning process that incorporates both functional components.
Solution Approach 2:
The patent merges the nanofiber formation process with the incorporation of thermally responsive functionality by adding cross-linking agents and functional polymers to the electrospinning solution. This combining of steps integrates structure formation and functionalization into a single electrospinning process, reducing the number of separate fabrication steps while achieving temperature-responsive surface properties.
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 approach enables a versatile and efficient method for surface modification, providing a thermally responsive surface that can change properties with temperature, facilitating the immobilization of biologically active materials while maintaining their bioactivity, and allowing for controlled binding and release of target molecules.
Implementation Method 1
a cross-linking agent with latent reactive groups that form covalent bonds upon exposure to energy sources
Implementation Method 2
thermally responsive nanofibers, specifically thermally responsive nanofibers, using a thermally responsive polymer... providing a thermally responsive surface that can change properties with temperature
Implementation Method 3
Nanofibers may be fabricated by electrostatic spinning (also referred to as electrospinning). The technique of electrospinning of liquids and/or solutions capable of forming fibers, is well known and has been described in a number of patents
Data Source
AI summary
A stimuli responsive nanofiber that includes a stimuli responsive polymer, such as a thermally responsive polymer, and a cross-linking agent having at least two latent reactive activatable groups. The nanofiber may also include a biologically active material or a functional polymer. The stimuli responsive nanofiber can be used to modify the surface of a substrate. When the nanofiber includes a thermally responsive polymer, the physical properties of the surface can be controlled by controlling the temperature of the system, thus controlling the ability of the surface to bind to a biologically active material of interest.