Biopolymer Matrix Extrusion for Mechanical Control
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Solution Overview
Problem
Biopolymer-based matrices face challenges in adapting properties for various medical and cosmetic applications due to the complexity of biological systems, lacking control over structural and mechanical functions without inducing a foreign body response.
Innovation Solution
A method involving extrusion of a biopolymer composition through a slit onto a surface, with optional freezing and layering, allows for the adjustment of tensile strength, biodegradability, and elastic modulus by controlling process parameters such as slit width, movement speed, and pressure, enabling adaptable properties for different applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biopolymer-based matrices are used to provide biological stimulation and cell colonization, then biological compatibility is improved, but control over structural and mechanical properties deteriorates
Solution Approach 1:
The patent applies parameter changes by systematically varying extrusion parameters (temperature, pressure, slit width, cooling rate) to control the structural and mechanical properties of biopolymer matrices. This allows precise control over tensile strength, elasticity, and degradation rate while maintaining biological compatibility of the biopolymer material itself.
Solution Approach 2:
The extrusion process described in the patent serves multiple functions simultaneously: it shapes the matrix structure, controls molecular orientation, regulates crystallinity, and determines mechanical properties. This multi-functional approach enables comprehensive control over matrix characteristics while using biopolymer materials that provide biological stimulation.
2Manufacturing precision
If artificial polymers are used to control polymer properties and matrix characteristics, then manufacturing control is improved, but biological stimulation and cell colonization deteriorate
Solution Approach 1:
The patent employs composite material strategies by combining biopolymer base materials with controlled structural features achieved through extrusion. The resulting matrices possess both the biological compatibility of natural polymers and the controlled structural properties typically associated with synthetic materials, creating a functional composite system.
3Strength
If biopolymer composition is extruded with controlled parameters to improve structural alignment, then tensile strength is improved, but process complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-heating the biopolymer composition to its melting point before extrusion and preparing the extrusion apparatus with controlled cooling systems in advance. This preliminary preparation enables precise control over molecular alignment during extrusion, resulting in improved tensile strength without requiring complex real-time adjustments during the extrusion process itself.
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 method produces biocompatible matrices with improved mechanical properties, such as enhanced tensile strength and reduced plastic deformation, suitable for diverse medical and cosmetic uses by aligning the biopolymer structure during extrusion, overcoming limitations of traditional biopolymer matrices.
Implementation Method 1
b) extruding the composition into a layer through a slit onto a surface, wherein the slit moves over the surface
Implementation Method 2
e) freezing the composition or compositions after extrusion; wherein preferably the surface can be cooled
Implementation Method 3
f) optionally drying the frozen composition
Data Source
AI summary
The present invention relates to a method for the production of a biocompatible matrix the method comprising: a) providing a composition comprising at least one biopolymer; b) extruding the composition into a layer through a slit onto a surface, wherein the slit moves over the surface; c) optionally freezing the layer; d) optionally repeating the process to add one or more further layers; e) freezing the composition or compositions after extrusion; f) optionally drying the frozen composition wherein preferably the surface can be cooled. The invention further relates to a biocompatible matrix obtainable by the method as well as to the use of a matrix obtainable by the method for medical or cosmetic purposes. Moreover, the present invention also relates to a device for the production of a biocompatible matrix, comprising: a) a temperature controlled surface; b) an extruding means with a slit positioned above the surface; c) means for extruding a composition through the slit; d) means for moving the slit and/or the surface.