Wet Spinning Protocol
Wet Spinning Protocol - Related Videos
06:56
Wet-spinning-based Molding Process of Gelatin for Tissue Regeneration
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Cited by 5 •
2019
We developed and describe a protocol based on the wet spinning concept, for the construction of gelatin-based biomaterials used for the application of tissue engineering.
01:08
Spin–Spin Coupling Constant: Overview
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2024
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1. Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
01:08
NMR Spectroscopy: Spin–Spin Coupling
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2024
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved in...
01:17
Spin–Spin Coupling: One-Bond Coupling
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2024
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
06:26
Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
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2017
Here, we present a protocol to trigger an orientational transition of a liquid crystal in response to temperature. Methodologies are described for preparing a sample in order to observe the transition and the detailed transitional evolution.
FAQs
As the extruded polymer solution enters the coagulation bath, solvent exchange or precipitation changes the solution into a solid filament. This transition determines how quickly the emerging jet stabilizes and can affect internal porosity and the resulting fiber structure. Controlling the bath composition therefore helps researchers tune the architecture and performance of fibers made for bioengineering.
Polymer concentration, extrusion rate, spinneret dimensions, bath composition, and collection speed collectively control fiber formation. These parameters influence filament diameter, porosity, alignment, and mechanical performance rather than acting independently. Adjusting them allows a protocol to produce fibers with different structural characteristics while maintaining the continuous filament format needed for engineered materials.
Collection speed influences how the emerging filament is gathered and can alter fiber alignment and overall architecture. Because alignment is one of the structural features controlled by a wet spinning protocol, changing collection conditions provides a way to tailor the organization of the finished material. This is especially relevant when engineered structures require a controlled, rather than random, arrangement.
A typical workflow prepares a polymer solution, drives it through a spinneret, directs the emerging jet into a liquid coagulation bath, and collects the solidifying filament. The protocol then regulates variables such as extrusion rate and collection speed. These coordinated steps determine whether the resulting fiber achieves the intended diameter, porosity, alignment, and mechanical performance.
The essential setup includes a spinneret, a mechanism for extruding the polymer solution, a liquid coagulation bath, and a collection system. Process control centers on spinneret dimensions, polymer concentration, extrusion rate, bath composition, and collection speed. Together, these choices establish the conditions that shape filament formation and the architecture of the collected fiber.
Wet spinning is useful when bioengineers need continuous fibers with tunable architecture and functionality. The resulting filaments can support tissue-engineering scaffolds, biomimetic materials, and other engineered structures. By adjusting protocol parameters, researchers can target differences in diameter, porosity, alignment, and mechanical performance to match the structural requirements of a particular application.