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首页> 外文期刊>Journal of Applied Polymer Science >Dissolution and Characterization of Regenerated Antheraea pernyi Silk Fibroin
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Dissolution and Characterization of Regenerated Antheraea pernyi Silk Fibroin

机译：再生per蚕丝丝蛋白的溶解与表征

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摘要

Dissolution of Antheraea pernyi silk fiber was carried out in a calcium nitrate solution with various dissolving conditions. The solubility was significantly dependent on the concentration of calcium nitrate, dissolving temperature. and time. The proper conditions of dissolution were found as 7M calcium nitrate, 100degC temperature, and 3 h dissolving time. The aqueous solution of A. pernyi silk fibroin was composed of a mixture of polypeptides with several molecular weights above 14 kDa. FTIR and XRD showed that regenerated A. pernyi silk fibroin was composed of an a-helix as well as a random-coil conformation while silk fiber had a traditional #beta#-sheet structure. The endo-exo transition in the temperature ranges of 228-232degC also supports these conformations of regenerated silk fibroin film. TGA and DTG curves showed that the thermal decomposition of regenerated A. pernyi silk fibroin proceeded by three steps, not dependent on the conformation. The mechanical damping peaks (tan #delta#) appeared about 227degC with a minor shoulder maximum about 240degC, which were somewhat lower than those of tussah silk fiber.
机译：ther蚕丝纤维的溶解是在各种溶解条件下的硝酸钙溶液中进行的。溶解度显着取决于硝酸钙的浓度，溶解温度。和时间。发现适当的溶解条件是7M硝酸钙，100℃的温度和3小时的溶解时间。 pernyi丝素蛋白的水溶液由几种分子量大于14 kDa的多肽混合物组成。 FTIR和XRD表明，再生的A.pernyi丝纤蛋白由α-螺旋和无规卷曲构象组成，而丝纤维具有传统的＃beta＃-片层结构。 228-232℃温度范围内的内-外转变也支持再生的丝素蛋白膜的这些构象。 TGA和DTG曲线表明，再生的pernyi丝纤蛋白的热分解过程分为三个步骤，而与构象无关。机械阻尼峰（tan＃delta＃）出现在227°C左右，而肩部最大最大值在240°C左右，略低于蚕丝纤维。

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