An increase in health awareness, emerging communicable disease, and an increasing of older population support the important of product with antimicrobial characteristic. Market research reported an increase in global revenue of antimicrobial product to reach $16 million by the end of 2020. Currently, trend of antimicrobial agent is moving toward organic material but more research and investigation is required before it can completely replace traditional material, metallic compound. Lignin is one of the major natural resource and by-product from industrial process that exhibit antimicrobial activity. Variation of plant source play significant role in antimicrobial activity due to its variation of basic compound of lignin. In Thailand, it is estimated that approximately 7.5 million ton is available for utilization, annually, from sugar industry alone. Diversity of lignin composition, its antimicrobial activity and large supply of the material that is waiting to be utilized provide great opportunity for utilization of lignin as antimicrobial agent.
In this paper the launching of liquid polymer jets from the apex of gas bubbles on the polyvinylpyrrolidone in ethanol (PVP) solution surface due to an applied electrical potential is investigated. Jets of polymer launched from bubble provide an alternative method for electrospinning polymer nanofibers that may be scalable for commercial production. Bubbles were experimentally created on the surface of a polymer solution by forcing air through a syringe into the polymer solution. An electric potential was applied to the solution to launch the jets. The polymer solution concentration was varied to determine the optimum concentration. The semi-angle of the apex of bubble just prior to jet launch was observed to be close to the theoretical value of 49.3 degrees for a pendant drop.
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