A new kind of silk fibroin based oil sorbent has been developed by coating chitosan onto silk fibroin. The effect of chitosan coating on oil sorption and oil retention behavior of silk fibroin is studied. The maximum oil sorption capactiy of chitosan coated silk fibroin is 26.80 g/g and 19.46 g/g for engine oil and diesel oil respectively. SEM is used to analyze the surface morphology and FTIR confirms the chemical changes after chitosan treatment. Reusability test results suggest that after 5 cycles, the oil absorbency of chitosan coated silk fibroin is 14.39 g/g and 10.30 g/g against engine oil and diesel oil respectively. A comparison of oil sorption capacity of chitosan coated silk fibroin with other synthetic sorbents is also presented. It is concluded that chitosan coated silk fibroin has the potential to become widely employed sorbent for oil spill removal applications.

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丝素蛋白上的壳聚糖涂层用于溢油处理

通过将壳聚糖涂覆在丝素蛋白上，已经开发了一种新型的丝素蛋白基油吸附剂。研究了壳聚糖涂层对丝素蛋白的吸油和保油性能的影响。壳聚糖包被的丝素蛋白对机油和柴油的最大吸油能力分别为26.80 g / g和19.46 g / g。SEM用于分析表面形态，FTIR证实脱乙酰壳多糖处理后的化学变化。可重复使用性测试结果表明，经过5个循环后，壳聚糖包被的丝素蛋白对机油和柴油的吸油率分别为14.39 g / g和10.30 g / g。还提出了壳聚糖包被的丝素蛋白与其他合成吸附剂的吸油量比较。