青酶加固蚕丝织物的性能表征及寿命评估

Performanee Characterization and Life Assessment of the Silk Fabric Reinforced by Transglutaminase

为提高丝织物的力学性能,通过液态谷氨酰胺转氨酶--青酶(TGase)催化酪蛋白酸钠(casein sodium,SC)生成生物大分子聚合物,并与丝织物上的蛋白质交联位点进行交联,再将丝素蛋白(silk fibroin,SF)溶液喷涂在丝织物的表面,制得青酶加固丝织物。对加固丝织物的表观形貌、力学性能、色差以及红外光谱进行测试,结果表明,当SF质量分数为1.0%时,加固后丝织物的断裂应力相比未处理样增加了20.89%,达到了最佳加固效果并且不会影响丝织物的色差。通过保存指数(preservation index,PI)评估加固丝织物的保存寿命,结果表明,高温、高湿环境会造成PI值降低,导致丝织物降解。该方法有望用于纺织文物的保护和增强。

To improve the mechanical properties of silk fabrics,a liquid transglutaminase(TGase)catalyzed casein sodium(SC)was used to generate biomacromolecular polymers to crosslink with the protein cross-linking sites on silk fabrics,and the silk fibroin(SF)solution was sprayed on the surface of silk fabric to produce TGase-reinforced silk fabrics.The morphology,tensile strength,color difference and infrared spectroscopy of the silk fabric were tested.The results show that when the SF mass fraction is 1.0%,the breaking stress of the reinforced silk fabric increases by 20.89%compared with the untreated one,thus achieving the best reinforcement effect and having no effect on color difference.The preservation time of the reinforced silk fabric was evaluated by the preservation index(PI).The result indicates that the hot and humid environment can decrease the PI value,even lead to the degradation of silk fabrics.The method is expected to be used for the protection and enhancement of textile artifacts.