Testing and Evaluation of the Oil Absorption Characteristics of Cotton Fibers

ABSTRACT

The wetting property to different oil of cotton fibers which come from different regions of China was studied. The surface adsorption characteristics of cotton fibers were characterized. It is found that the oleophilic and hydrophobic properties of all the raw cotton fibers are fantastic and the average static contact angle of cotton fibers to water is 135.36°, but it is less than 51° to different oil such as engine oil, waste oil and salad oil. In the dynamic spreading process, the droplets of water formed on the surface of cotton fibers and the contact angles of all the cotton fibers to water is not changing with time while the oil liquids were quickly and completely spread out almost in 2000 ms. The speed of spreading is closely relevant with the viscosity of oil and the higher oil viscosity, the slower wetting velocity. The contact angles of cotton fibers come from different regions to the same oil liquid had little changes, thus the adsorption velocity difference of cotton fibers to engine oil, waste oil and salad oil was not significant, respectively.

摘要

研究了我国不同地区棉纤维对不同油脂的润湿性. 对棉纤维的表面吸附特性进行了表征. 研究发现, 所有原棉纤维的亲油性和疏水性都很好, 棉纤维与水的平均静态接触角为135.36°, 但与不同的油如机械油、废油和植物油的接触角小于51°. 在动态铺展过程中, 棉纤维表面形成的水滴和所有棉纤维与水的接触角不随时间变化, 而油液几乎在2000ms内迅速完全铺展. 摊铺速度与油的粘度密切相关, 油的粘度越高, 润湿速度越慢. 来自不同地区的棉纤维对同一种油液的接触角变化不大, 因此棉纤维对机械油、废油和植物油的吸附速度差异不显著.

KEYWORDS:

• Cotton fiber
• Wetting property
• Absorption property
• Testing and evaluation

关键词:

• 棉纤维
• 润湿性
• 吸收性能
• 测试和评估

Acknowledgments

This work is supported by the Open Project of Key Laboratory of Silk Engineering of Jiangsu Province (No. KJS2059). We also acknowledge the financial support from the Plan for young and middle-aged university teachers in Shanghai to study abroad in 2020.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Teacher Development Project of Shanghai Education Commission [2020 Shanghai University Teacher Training Plan]; the Open Project of Key Laboratory of Silk Engineering of Jiangsu Province [KJS2059].