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Electrospinning of Near Gel Resin to Produce Crosslinked Fibrous Matrices.

07:00 EST 13th February 2020 | BioPortfolio

Summary of "Electrospinning of Near Gel Resin to Produce Crosslinked Fibrous Matrices."

Electrospun fibers and matrices have been researched for their utility in various fields, however due to poor mechanical strength and loss of structural integrity, their commercial viability is limited. A near gel resin (nGR) of polystyrene (PS) was used in the present approach to fabricate crosslinked fibrous matrices of better mechanical strength and oil adsorption while retaining the structural integrity. Electrospinnability of nGR was assessed in bulk (i.e. in styrene monomer) and in solution (i.e. in dimethyl formamide) form with variation in formulation and electrospinning conditions. Ultimately, a uniform crosslinked fibrous matrix of PS was prepared using an oil-in-water emulsion, where the oil phase comprised of monomer (styrene), initiator (benzoyl peroxide) and crosslinker (divinylbenzene) was dispersed in a continuous phase of aqueous poly (vinyl alcohol) (PVA). The monomer conversion in oil phase was carried out below the gel point and the nGR of PS formed in dispersed droplets was electrospun to fabricate uniform fibrous matrices with help of template polymer i.e. PVA. Effect of various material and process parameters on gelation behavior, electrospinnability and fiber uniformity was studied and optimized to produce uniform core-sheath fibrous matrices of crosslinked PS. Post-electrospinning heat treatment of matrices was carried out to achieve complete monomer conversion and cross-linking. Fiber formation behavior of the emulsion was assessed using ionic and non-ionic surfactants. The crosslink density of the matrices was optimized to achieve desired structural morphology and dimensional stability. The process of fabrication of emulsion electrospun crosslinked fibers can further be extended to a variety of other monomers in order to enhance the suitability of fibrous matrices for many applications.

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This article was published in the following journal.

Name: Langmuir : the ACS journal of surfaces and colloids
ISSN: 1520-5827
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