Electrospinning Apparatus for Core-Shell Nanofibers
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Solution Overview
Problem
Existing electrospinning apparatuses are inconvenient for preparing nanofibers of core-shell structure, which limits their ability to meet the requirements for physical and chemical properties in various applications.
Innovation Solution
An electrospinning apparatus comprising a high-voltage electrostatic generator, a frame, a liquid brusher, and a chain-drive mechanism that allows for the simultaneous formation of core and shell fibers by using a horizontally moving mechanism to brush shell solution over a chain immersed in core solution, creating a core-shell structure under an electrostatic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional electrospinning apparatuses are used, then the preparation process is simple, but the apparatus is inconvenient for preparing nanofibers of core-shell structure
Solution Approach 1:
The apparatus is divided into functionally independent modules: a horizontal moving mechanism for positioning, a chain-drive mechanism for synchronized rotation, a liquid brusher for shell solution application, and reservoirs for core and shell solutions. Each module performs a specific function, making the complex task of core-shell nanofiber preparation manageable and convenient through modular operation.
Solution Approach 2:
A chain acts as an intermediary carrier between the core solution reservoir and the collection area. The chain rotates to pick up core solution droplets, transport them, and facilitate shell solution coating by the liquid brusher, enabling precise core-shell structure formation without direct manual intervention.
2Productivity
If conventional electrospinning apparatuses are used, then the equipment is simple, but the preparation efficiency is low
Solution Approach 1:
The chain rotates continuously, constantly presenting fresh surfaces for core solution pickup and shell solution coating. The horizontal moving mechanism continuously positions the chain at optimal locations, and the liquid brusher continuously applies shell solution, maintaining uninterrupted core-shell nanofiber formation and maximizing preparation efficiency.
Solution Approach 2:
The core solution is pre-loaded into reservoirs that feed the rotating chain. The chain pre-positions core solution droplets at specific locations before the liquid brusher applies the shell solution. This preliminary preparation of materials and positioning enables efficient, continuous core-shell nanofiber fabrication without delays.
3Manufacturing precision
If conventional electrospinning apparatuses are used, then the structure is simple, but the uniformity of core-shell structure is difficult to achieve
Solution Approach 1:
The chain rotates dynamically, allowing different portions of the chain to be at different stages of the core-shell formation process simultaneously. This dynamic rotation ensures uniform exposure of all core solution droplets to the shell solution coating by the liquid brusher, achieving consistent core-shell structure uniformity across all nanofibers.
Solution Approach 2:
The synchronized coordination between the chain rotation, horizontal moving mechanism, and liquid brusher creates a feedback-controlled system. The chain's position and rotation speed are controlled to ensure optimal timing for core solution pickup and shell solution application, maintaining uniform core-shell structure formation through precise process control.
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 apparatus efficiently prepares nanofibers with a uniform core-shell structure, enhancing preparation efficiency and convenience, thereby facilitating their application in materials science, biomedicine, and other fields.
Implementation Method 1
Electrospinning technology uses electric field force to draw polymer solution or melt out of a capillary mouth to form a jet
Implementation Method 2
after swinging, evaporation and refined evaporation, a nano-scale fiber is finally obtained
Implementation Method 3
The chain is engaged with a spray sprocket, the spray sprocket is connected with a first motor via a revolving shaft
Implementation Method 4
the liquid brusher is configured to brush a shell solution over the chain
Data Source
AI summary
The present provides an electrospinning apparatus for fabricating a nanofiber of core-shell structure, including a high-voltage electrostatic generator, a frame and a liquid brusher. A horizontally moving means is connected to the frame, and the horizontally moving means is connected with the liquid brusher. A chain-drive mechanism and a first reservoir are provided below the liquid brusher, the chain-drive mechanism includes a first sprocket and a second sprocket, and a chain is connected between the first sprocket and the second sprocket. The chain is engaged with a spray sprocket, and the spray sprocket is connected with a first motor via a revolving shaft. A core solution is contained in the first reservoir, and the lower portion of the spray sprocket is immersed in the core solution. The horizontally moving means drives the liquid brusher to move along the chain, and the liquid brusher brushes the shell solution over the chain.