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丝胶茧生物相容剂用于热塑性木薯淀粉的反应性共混。

Sericin cocoon bio-compatibilizer for reactive blending of thermoplastic cassava starch.

机构信息

School of Agro-Industry, Faculty of Agro-Industry, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand.

Cluster of Agro Bio-Circular-Green Industry, Faculty of Agro-Industry, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand.

出版信息

Sci Rep. 2021 Oct 7;11(1):19945. doi: 10.1038/s41598-021-99417-3.

DOI:10.1038/s41598-021-99417-3
PMID:34620941
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8497493/
Abstract

Cassava starch was blended with glycerol to prepare thermoplastic starch (TPS). Thermoplastic starch was premixed with sericin (TPSS) by solution mixing and then melt-blended with polyethylene grafted maleic anhydride (PEMAH). The effect of sericin on the mechanical properties, morphology, thermal properties, rheology, and reaction mechanism was investigated. The tensile strength and elongation at break of the TPSS10/PEMAH blend were improved to 12.2 MPa and 100.4%, respectively. The TPS/PEMAH morphology presented polyethylene grafted maleic anhydride particles (2 μm) dispersed in the thermoplastic starch matrix, which decreased in size to approximately 200 nm when 5% sericin was used. The melting temperature of polyethylene grafted maleic anhydride (121 °C) decreased to 111 °C because of the small crystal size of the polyethylene grafted maleic anhydride phase. The viscosity of TPS/PEMAH increased with increasing sericin content because of the chain extension. Fourier-transform infrared spectroscopy confirmed the reaction between the amino groups of sericin and the maleic anhydride groups of polyethylene grafted maleic anhydride. This reaction reduced the interfacial tension between thermoplastic starch and polyethylene grafted maleic anhydride, which improved the compatibility, mechanical properties, and morphology of the blend.

摘要

木薯淀粉与甘油混合制备热塑性淀粉(TPS)。热塑性淀粉通过溶液混合与丝胶(TPSS)预混合,然后与接枝马来酸酐的聚乙烯(PEMAH)熔融共混。研究了丝胶对力学性能、形态、热性能、流变性能和反应机理的影响。TPSS10/PEMAH 共混物的拉伸强度和断裂伸长率分别提高到 12.2 MPa 和 100.4%。TPS/PEMAH 的形态呈现出接枝马来酸酐的聚乙烯颗粒(2 μm)分散在热塑性淀粉基体中,当使用 5%丝胶时,其尺寸减小至约 200 nm。由于接枝马来酸酐相的小晶体尺寸,接枝马来酸酐的聚乙烯的熔融温度(121°C)降低至 111°C。由于链延伸,TPS/PEMAH 的粘度随丝胶含量的增加而增加。傅里叶变换红外光谱证实了丝胶的氨基与接枝马来酸酐的聚乙烯的马来酸酐基团之间的反应。这种反应降低了热塑性淀粉和接枝马来酸酐的聚乙烯之间的界面张力,从而改善了共混物的相容性、力学性能和形态。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/d28f3b81ebbe/41598_2021_99417_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/665a1d045878/41598_2021_99417_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/4888960b4846/41598_2021_99417_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/b6325665f632/41598_2021_99417_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/69ba25d31b66/41598_2021_99417_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/4273789efaf5/41598_2021_99417_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/027f21c23941/41598_2021_99417_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/267821d62ebc/41598_2021_99417_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/d28f3b81ebbe/41598_2021_99417_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/665a1d045878/41598_2021_99417_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/4888960b4846/41598_2021_99417_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/b6325665f632/41598_2021_99417_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/69ba25d31b66/41598_2021_99417_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/4273789efaf5/41598_2021_99417_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/027f21c23941/41598_2021_99417_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/267821d62ebc/41598_2021_99417_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28e2/8497493/d28f3b81ebbe/41598_2021_99417_Fig8_HTML.jpg

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