TAILIEUCHUNG - Removal of protein from natural rubber in pilot scale toward production of low protein rubber gloves
The results showed that in the presence of ethanol, the nitrogen content decreased from wt.% to approximately wt.% after two times of centrifugation. The rubber glove made from the LPNR latex contains the lowest nitrogen content among various commercial rubber gloves. | Journal of Science & Technology 126 (2018) 001-004 Removal of Protein from Natural Rubber in Pilot Scale Toward Production of Low Protein Rubber Gloves Nghiem Thi Thuong1, Tran Anh Dung1, Do Quoc Viet1, Nguyen Ngoc Tue1, Nguyen Thu Ha1, Tran Thi Thuy1, Phan Trung Nghia1*, Yoshimasa Yamamoto2 and Seiichi Kawahara3 1 Hanoi University of Science and Technology, No 1 Dai co viet , Hai Ba Trung, Hanoi, Vietnam Tokyo National College of Technology, 1220-2 Kunugida-machi, Hachioji, Tokyo 193-0997, Japan 3 Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka, Niigata, Japan 940-2188 Received: June 26, 2017; Accepted: June 25, 2018 2 Abstract Removal of protein from natural rubber was carried out at pilot scale in latex stage to prepare low-protein natural rubber (LPNR) and the resulting product was subsequently subjected to rubber glove production. The LPNR was prepared by the novel procedure to remove proteins from natural rubber using urea as denaturing agent together with a polar solvent, . ethanol in the presence of sodium dodecyl sulfate (SDS) as a surfactant. The condition for the removal of protein was investigated in term of number of centrifugation in large scale. The residual protein, which is assessed by the amount of nitrogen in the sample, was determined by Kjeldahl method. The results showed that in the presence of ethanol, the nitrogen content decreased from wt.% to approximately wt.% after two times of centrifugation. The rubber glove made from the LPNR latex contains the lowest nitrogen content among various commercial rubber gloves. Keywords: removal of protein, pilot scale, latex stage, rubber glove, extractable protein 1. Introduction1 performed in a batch system due to the long incubation time and strict temperature control. Therefore, it is quite important to develop a novel technique to apply for continuous process. The removal of proteins from natural rubber (NR) at pilot scale may attract attention to become .
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