Electrospun Fiber Geometry Control for 3D Structure Integration
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Solution Overview
Problem
Existing manufacturing processes struggle with integrating delicate fiber structures, such as electrospun fibers and droplet membranes, into three-dimensional objects due to their fragility and the difficulty in handling and attaching them to structures without causing damage.
Innovation Solution
A combined manufacturing process using additive manufacturing and electric field patterning, where a build plate with conductive pins or a conductive structure is used to support and control the deposition of fibers and droplets, allowing a portion of the mat to be bonded to the structure while another portion remains unsupported, thereby integrating these structures into the object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrospun fibers and droplet membranes are manually handled and attached to structures, then integration into three-dimensional objects can be achieved, but damage to delicate materials occurs and manufacturing complexity increases
Solution Approach 1:
The patent combines additive manufacturing with electrospinning by integrating the electrospinning collector into the additive manufacturing build plate. This merging allows fiber mats to be deposited directly onto the build surface and subsequently support structures to be printed, eliminating manual handling and reducing process complexity while maintaining material integrity.
Solution Approach 2:
The build plate serves as an intermediary that performs multiple functions: it supports the electrospinning collector, provides the build surface for additive manufacturing, and enables direct integration of fiber structures with printed structures. This intermediary eliminates the need for separate manual assembly steps.
2Manufacturing precision
If a complete collector is used in electrospinning, then uniform fiber deposition is achieved, but integration with additive manufacturing structures is limited
Solution Approach 1:
The collector is segmented into discrete conductive pins arranged in an array on the build plate. This segmentation allows selective activation of individual pins or groups of pins, enabling precise control over fiber deposition locations while maintaining the ability to integrate with three-dimensional printed structures at different positions.
Solution Approach 2:
The system dynamically controls the electrical state of individual conductive pins, allowing the electric field configuration to be changed during the manufacturing process. This enables adaptive fiber deposition patterns that can be adjusted to match the geometry of printed structures, enhancing integration capability.
3Ease of manufacture
If electrospinning is performed on a traditional build plate, then fiber mat formation is simple, but integration with three-dimensional printed structures is difficult
Solution Approach 1:
The build plate is designed with multi-functionality: it serves as the electrospinning collector substrate, the additive manufacturing build surface, and the support structure for both processes. This universal design simplifies the overall manufacturing process by eliminating the need for separate plates or substrates for each process, while enabling tight integration between fiber mat formation and three-dimensional structure printing.
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 facilitates the creation of complex three-dimensional objects with integrated fiber and droplet structures without manual handling, improving yield, reliability, and reducing time, while avoiding damage to delicate materials.
Implementation Method 1
utilizing a manufacturing process (e.g., an additive manufacturing process such as fused deposition modeling process or other suitable process) to position a structure over at least a portion of the mat
Implementation Method 2
electric field patterning is a process whereby a machine implements a method such as electrospinning, electrospraying, or electro-writing to construct an object
Data Source
AI summary
An object is built by depositing a mat on a build surface and utilizing a manufacturing process to position a structure over at least a portion of the mat to define an object. The object is removed from the build surface such that a first portion of the mat removed with the object is bonded to the structure, and a second portion of the mat removed with the object is unsupported by the structure. Alternatively, an object can be built by printing a conductive material over a surface to define a structure and utilizing the conductive material as a collector to control an electric field deposition over the structure to define an object where a first portion of the deposition is bonded to the structure and a second portion of the deposition is unsupported by the structure.