Next Article in Journal
Effect of Nozzle Diameter on Basalt Continuous Fiber Properties
Previous Article in Journal
Composite Performance Evaluation of Basalt Textile-Reinforced Geopolymer Mortar
Open AccessArticle

Probing of Nanoscale Friction and Mechanical Characteristics of Cotton Fiber’s Surface

Department of Biological and Agricultural Engineering, Texas A&M University, College Station, TX 77843, USA
*
Author to whom correspondence should be addressed.
Fibers 2019, 7(7), 64; https://doi.org/10.3390/fib7070064
Received: 7 May 2019 / Revised: 2 July 2019 / Accepted: 9 July 2019 / Published: 15 July 2019
The surface topography and nanomechanical attributes of two samples of cotton fibers, namely, A and B, were characterized with various operation modes of an Atomic Force Microscope (AFM). The surface topography and friction images of the fibers were obtained in contact mode. The nanomechanical properties images—i.e., adhesion and deformation—were obtained in force tapping mode. The results indicate that the surface nanomechanical and nanoscale frictional properties of the fibers vary significantly between two samples. The plots of friction versus normal force of the fibers’ surface from both samples are fitted to the equation of single-asperity, adhesion-controlled friction. Nevertheless, within the range of the applied normal force, the friction curves of sample A surfaces show a characteristic transition phase. That is, under low normal forces, the friction curves closely conform with the Hertzian component of friction; after the transition takes place at higher normal forces, the friction curves follow Amontons’ law of friction. We demonstrated that the transition phase corresponds to a state at which the cuticle layer molecules are displaced from the fibers’ surface. The average adhesion force of the samples is consistent with the average friction signal strength collected under low normal forces. View Full-Text
Keywords: cotton fiber; cuticle layer; adhesion-controlled friction; AFM; optimization cotton fiber; cuticle layer; adhesion-controlled friction; AFM; optimization
Show Figures

Figure 1

MDPI and ACS Style

Hosseinali, F.; Thomasson, J.A. Probing of Nanoscale Friction and Mechanical Characteristics of Cotton Fiber’s Surface. Fibers 2019, 7, 64.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop