Affiliation:
1. Department of Materials Engineering Rajamangala University of Technology Isan 744, Suranarai Road, Mueang Nakhon Ratchasima Thailand
2. Institute of Ceramic and Polymer Engineering University of Miskolc Miskolc‐Egyetemvaros 3515 Hungary
3. Hevesy György PhD School of Chemistry Eötvös Loránd University Pázmány Péter sétány 1/A Budapest H‐1117 Hungary
Abstract
AbstractThis research aims to enhance natural rubber (NR) properties by incorporating spent coffee grounds (SCGs). Scanning electron microscope (SEM) reveals well‐dispersed SCG particles in the NR matrix without interaction. Shore A hardness notably increases by up to 49.90 (19% higher than unmodified), but tensile and tear strength decline with higher SCG levels. Optimal tear strength occurs at 10 phr of SCG due to uniform dispersion. The 300% modulus remains unchanged. The odor of composites (CO2 absorption) sees a 69.2% increase at 25 phr, while odor absorption efficiency peaks at 2%. Additionally, unmodified SCG affects scorch time (2.12%–23.40% increase from 1 to 20 phr) and cure time (3.12% to 76.82% improvement from 1 to 20 phr). These findings showcase improved hardness, enhanced CO2 absorption capacity, and effective odor control. Additionally, this study sheds light on the influence of SCG on processing times, contributing valuable insights for eco‐friendly applications.
Funder
Eötvös Loránd Tudományegyetem