Faculty of Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand; Center of Excellence in Materials Science and Technology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Cluster of Agro Bio-Circular-Green Industry (Agro BCG), Chiang Mai University, Chiang Mai 50100, Thailand.
Faculty of Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand.
Int J Biol Macromol. 2021 Oct 1;188:283-289. doi: 10.1016/j.ijbiomac.2021.07.187. Epub 2021 Jul 31.
Oil resistant thermoplastic elastomers (TPE) were prepared using mung bean thermoplastic starch (MTPS) blending with rubbers and sericin. Sericin was incorporated into MTPS as a compatibilizer. MTPS with sericin (MTPSS) was blended with natural rubber (NR) and epoxidized NR (ENR). Sericin at 5% improved the tensile strength (10 MPa), elastic recovery (52%) and morphology of the MTPSS/ENR blend. The mechanical properties, elastic recovery and morphology of the MTPSS5/NR blend were improved by the addition of ENR. The MTPSS/ENR showed palm (28%) and motor oils (8%) swelling resistance because of the hydrophilicity of MTPS and high polarity of ENR. The MTPSS/ENR/NR showed gasoline swelling resistance (104%) because of the hydrophilicity of MTPS and low polarity of NR. FTIR confirmed a reaction between the -NH groups of sericin and the epoxy groups of ENR. This reaction improved the compatibility, mechanical properties, elastic recovery, morphology and oils swelling resistance of the blends.
油 resistant 热塑性弹性体（TPE）是通过绿豆热塑性淀粉（MTPS）与橡胶和丝胶共混制备的。丝胶被用作 MTPS 的相容剂。含有丝胶的 MTPS（MTPSS）与天然橡胶（NR）和环氧化 NR（ENR）共混。丝胶含量为 5%时，可提高 MTPSS/ENR 共混物的拉伸强度（10 MPa）、弹性回复率（52%）和形态。加入 ENR 可提高 MTPSS5/NR 共混物的力学性能、弹性回复率和形态。由于 MTPS 的亲水性和 ENR 的高极性，MTPSS/ENR 显示出棕榈油（28%）和发动机油（8%）的抗溶胀性。由于 MTPS 的亲水性和 NR 的低极性，MTPSS/ENR/NR 显示出对汽油的抗溶胀性（104%）。FTIR 证实了丝胶的-NH 基团与 ENR 的环氧基团之间的反应。这种反应提高了共混物的相容性、力学性能、弹性回复率、形态和耐油溶胀性。
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