In a recently published paper titled “Hydrogel 3D Printing with Capacitive Edge Effects”, authors Wang Jikun, Lu Tongqing, Meng Yang, Sun Danqi, Xia Yukun, and Wang Tiejun further explore the applications of hydrogel manufacturing technology and propose new methods to overcome current difficulties.
Hydrogels are often the core of biological 3D printing. While these structures are also used for many other applications, such as making diapers, contact lenses, and drug delivery systems, the medical field benefits more from their ongoing use in tissue engineering. Hydrogels are categorized into many different types, such as functional, responsive, double-network, tough, and those included in soft sensors, actuators, and ionic devices.
Here are several aspects of rapid prototyping technology:
1. Hydrogel scaffolds;
2. Thermosensitive hydrogel composites;
3. Ionic high-integrity hydrogel display devices.
The principle of PLEEC: Asymmetric capacitors are separated by a dielectric layer
Basically, capacitors store charge. Here, the authors study and compare symmetric and asymmetric capacitors—the ultimate goal is to produce an asymmetric form that captures and controls liquids in open space. Their hydrogel 3D printing system consists of seven parts:
1. Mechanical module;
2. PLEEC panel;
3. Liquid addition unit;
4. Curing platform;
5. Curing device;
6. Power supply;
7. Control module.
The researchers use Arduino Mega 2560 R3 to control the system, with three 42 stepper motors driven by Leadshine DM542 controlling three sliding rails. They also use a high-voltage power supply (Trek 610E), powered at 3000 V with a frequency of 1 kHz.
Polymerization can be achieved through thermal curing, UV curing, or ion exchange curing, and hydrogels can be easily patterned into different composites. The researchers state that this curing method can achieve “excellent integrity and adhesion”.
Hydrogel 3D printing system using PLEEC
3D printing of hydrogels is popular in many research laboratories, continuously refreshing biological 3D printing technology. Currently, hydrogels are used for a wide range of applications.
Source: 3D Printing Business News
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