To improve the wear resistance of polyimide (PI), surface modification was developed. In this study, the tribological properties of graphene (GN), graphene oxide (GO), and KH550-grafted graphene oxide (K5-GO) modified PI were evaluated by molecular dynamics (MD) at the atomic level. The findings indicated that the addition of nanomaterials can significantly enhance the friction performance of PI. The friction coefficient of PI composites decreased from 0.253 to 0.232, 0.136, and 0.079 after coating GN, GO and K5-GO, respectively. Among them, the K5-GO/PI exhibited the best surface wear resistance. Importantly, the mechanism behind the modification of PI was thoroughly revealed by observing the wear state, analyzing the changes of interfacial interactions, interfacial temperature, and relative concentration.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10255322 | PMC |
| http://dx.doi.org/10.3390/polym15112577 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Physicochemical Properties of Curen® Filaments Versus Nylon Filaments in Toothbrush Bristles: An In Vitro Study.
Cureus
December 2024
Medical Affairs, Dr. Reddy's Laboratories Ltd., Hyderabad, IND.
Background Toothbrush manufacturers commonly use bristle materials such as nylon, polybutylene terephthalate, polypropylene, polyethylene terephthalate, boar hair, bamboo, carbon fiber, silicone, polylactic acid, or their modifications such as Curen. Nylon filaments have long been demonstrated to be durable and are widely used, but not much is known regarding the performance of Curen filaments compared to nylon filaments. This in vitro study compared the stiffness, abrasion potential, abrasion resistance, and bristle surface changes of Curen and nylon filaments.
View Article and Find Full Text PDFCompressing slippery surface-assembled amphiphiles for tunable haptic energy harvesters.
Sci Adv
January 2025
Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, USA.
A recurring challenge in extracting energy from ambient motion is that devices must maintain high harvesting efficiency and a positive user experience when the interface is undergoing dynamic compression. We show that small amphiphiles can be used to tune friction, haptics, and triboelectric properties by assembling into specific conformations on the surfaces of materials. Molecules that form multiple slip planes under pressure, especially through π-π stacking, produce 80 to 90% lower friction than those that form disordered mesostructures.
View Article and Find Full Text PDFIsolated Tin Enhanced CO Coverage-Regulation on SnCu Alloy for Selective CO Electroreduction to C Products.
Small
January 2025
Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, 510632, P. R. China.
Electricity-powered C─C coupling of CO represents an attractive strategy for producing valuable commodity chemicals with renewable energy, but it is still challenging to gain high C selectivity at high current density. Here, a SnCu single-atom alloy (SAA) is reported with isolated Sn atom embedded into the Cu lattice, as efficient ectrocatalyst for CO reduction. The as prepared SnCu-SAA catalyst shows a maximal C Faradaic efficiency of 79.
View Article and Find Full Text PDFAdapting Methods for Isolation and Enumeration of Microplastics to Quantify Tire Road Wear Particles with Confirmation by Pyrolysis GC-MS.
Environ Sci Technol
January 2025
U.S. Environmental Protection Agency, E205-02, Research Triangle Park, P.O. Box 12055, Durham, North Carolina 27711, United States.
The complex, varied composition (i.e., rubbers/elastomers, carbon black, fillers, additives, and embedded road materials) and wide density range of tire road wear particles (TRWPs) present challenges for their isolation and identification from environmental matrices.
View Article and Find Full Text PDFExperimental study on the influence of lapping plate materials on the quality of both sides cylindrical rollers machining.
Sci Rep
January 2025
College of Mechanical Engineering, Quzhou University, Quzhou, 324000, China.
The both-sides machining method can obtain high precision cylindrical rollers, but there is a drawback that the lapping plate is easy to wear, which restricts further improvement in the quality of rollers machining. Aiming to solve this problem, a both-sides machining method using hard ceramic lapping plate is proposed. Friction and wear experiments with different lapping plate materials, along with the corresponding comparative machining experiments, demonstrated the superior performance of AlO ceramic lapping plate in terms of roundness (0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!