Ratchanika Ngamkham. Development of composite films and fibers from natural rubber and lignin. Master's Degree(Chemical Engineering). Kasetsart University. Office of the University Library. : Kasetsart University, 2020.
Development of composite films and fibers from natural rubber and lignin
Abstract:
This work aimed to study NR, deproteinization natural rubber (DPNR), DPNR/ lignin composite by film casting and electrospinning. Characterizations included the determination of protein in NR and DPNR latex, functional group, structure and crystalline, thermal properties, morphology, average diameter of sample forming by electrospinning, and antimicrobial properties. It was found that protein in DPNR latex was lower than NR latex when removal of protein by urea, SDS solution, and acetone was removed. Functional group of samples from DPNR and NR was different. Peaks of 2, 5, 10 wt% DPNR/lignin composites appeared at 35703170 cm−1 because lignin had hydroxyl group. Peak of crystalline film of NR and DPNR samples appeared but peak of lignin was disappeared as it was amorphous. The morphology of NR, DPNR, and DPNR/lignin fiber were uniform. Chloroform was suitable solvent for dissolve NR and DPNR as solution of rubber and chloroform can be electrospun without droplet. Moreover, average diameter of fibers was increased as lignin content was increased. DPNR/ lignin 10 wt% fiber had the highest diameter. Antimicrobial test of every sample was negative because load of lignin was not enough for inhibited germs.
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