College of Textiles, Donghua University, Shanghai 201620, China.
College of Textiles, Donghua University, Shanghai 201620, China; Key Laboratory of Textile Science and Technology Ministry of Education, Donghua University, Shanghai 201620, China.
Mar Pollut Bull. 2015 Feb 15;91(1):230-7. doi: 10.1016/j.marpolbul.2014.11.044. Epub 2014 Dec 17.
Sorption rates of kapok fibers on different oils, such as diesel, cooking oil, used motor oil, and motor oil, were quantitatively evaluated by using a wicking method. Kapok fibers absorbing different oils exhibited large differences in terms sorption coefficients. Microscopic observations of oil wetting on a single kapok showed that the four oils had varying wettability and adhesiveness to kapok, but that all of them penetrated into kapok lumens quickly because of the fiber's low surface energy, which was 40.64 mN/m, and extreme hydrophobicity, with a water contact angle up to 151°. After treatment with chloroform, there were slight changes in oil absorbencies to kapok, but the sorption coefficients for the four oils increased markedly. SEM demonstrated that chloroform treatments caused the smooth surface of the kapok fibers to become highly roughened, with densely vertical grooves that provided more available surface and a larger driving force for oil sorption through the fiber assembly.
利用芯吸法定量评估了木棉纤维对不同油类（如柴油、食用油、废机油和机油）的吸附速率。吸收不同油类的木棉纤维在吸附系数方面表现出很大的差异。对单根木棉纤维上油类润湿的微观观察表明，四种油类对木棉纤维的润湿性和粘附性各不相同，但由于纤维的低表面能（40.64 mN/m）和极强的疏水性，接触角高达 151°，所有油类都很快渗透到木棉纤维的腔道中。用三氯甲烷处理后，木棉纤维对油类的吸油能力略有变化，但四种油类的吸附系数明显增加。SEM 表明，三氯甲烷处理使木棉纤维的光滑表面变得非常粗糙，形成了密集的垂直凹槽，为油类通过纤维组件的吸附提供了更多的可用表面积和更大的驱动力。
