Silicon-mediated polyacrylic acid and ethylene vinyl acetate (PAA/EVA) dual-crosslinked network binder for highly stable lithium-ion battery anode Susilo Sudarman, Andriayani Andriayani, Tamrin Tamrin, Muhammad Taufik, Ega Hidayani, Aniza Salviana Prayugo, Ardiansyah Sembiring, Rahmadina Rahmadina, Muhammad Iqbal Hidayat, Nur Ahmad, Bahrun Bahrun, Yusuf Mathiinul Hakim, Ridho Prasetyo, Febio Dalanta Results in Chemistry, 2026 High-capacity silicon (Si) anodes for lithium-ion batteries are limited by severe volume expansion during lithiation, resulting in the low stability performance. This condition is pushing innovations in both material synthesis and binder design. This study demonstrates the development of dual-crosslinked PAA/EVA network binder paired with Si synthesized from rice husk ash via a vacuum-magnesiohydrothermic reduction process. Optimization of the SiO 2 :Mg precursor ratios (1:1, 1.5:1, and 2:1) revealed that the 1.5:1 ratio (Si-1.5) produced the most favorable characteristics, including a uniform 65 nm globular morphology, 95.3% purity, and 17.65 m 2 g −1 of surface area with dominant pore size of 2.14 nm, indicating its mesoporous properties. Electrochemical evaluations demonstrated that the PAA/EVA dual-crosslinked binder significantly outperforms conventional PVDF binder. The Si-1.5/PAA/EVA system exhibited a charge transfer resistance of 11.43 Ω (compared to 24.56 Ω for PVDF) and an initial capacity of 1850 mAh g −1 , maintaining 1701 mAh g −1 after 150 cycles. Notably, the system achieved 93% capacity retention over 400 cycles, while Si-1.5/PVDF suffered a 37% loss by 240th cycle. The superior performance of PAA/EVA dual-crosslinked binder attributed to the synergistic effects of hydrogen bonding, covalent crosslinking, and elastomeric stress dissipation, which creating a self-healing network and preserving electrode integrity and mesoporous accessibility. Mechanistic analysis confirms that this network prevents the pulverization and delamination characteristic, which is occurred in PVDF binder. These results establish a commercially viable strategy for high-energy-density silicon anodes through the integration of morphology, porosity, and binder engineering.
Recent advances in the roles of spent coffee grounds as multifunctional fillers in biopolymer-based composites: a review Haya Fathana, Muhammad Iqbal Hidayat, Asranudin, Agus Wedi Pratama, Victor Feizal Knight, Mohd Nor Faiz Norrrahim, Dina Wahyu Indriani, Febio Dalanta South African Journal of Chemical Engineering, 2026 • Utilized SCG as multifunctional fillers that improved the performance of biofilms • Comparing biopolymer matrices reveals varied interactions shaping their properties • Lignin, cellulose, and phenolics in SCG enhance strength, UV-shielding, and antioxidant properties • Applying circular bioeconomy principles highlights SCG as a sustainable low-cost filler Spent coffee grounds (SCG), a prevalent byproduct of the global coffee industry, represent a significant lignocellulosic resource with considerable economic potential. Although the use of SCG as a filler in biopolymer-based films is increasing, a comprehensive evaluation of its multifunctional activities in diverse polymeric matrices is limited. This review aims to critically integrate current studies to elucidate how SCG composition and film preparation strategies govern the structural and functional performance of biopolymer films, demonstrating that SCG can perform multiple roles as a reinforcing, barrier-enhancing, and bioactive filler across a wide range of biopolymer matrices, enabling diverse functional and application-specific performances. SCG incorporation in biopolymer matrices such as chitosan, pectin, carboxymethyl cellulose (CMC), starch, gelatin, and polylactic acid (PLA) is discussed with emphasis on correlations between SCG composition, film processing, and resulting structural and functional properties. The findings indicate that SCG acts as a dual-function filler by enhancing film structure while imparting bioactive functionalities such as antioxidant activity and UV-blocking capability. Reported data show that SCG loadings (<10 wt%) can increase tensile strength by approximately 10–40% while improving UV shielding and antioxidant performance. However, excessive SCG content often reduces elongation at break, increases film brittleness, and compromises optical transparency, highlighting the importance of filler optimization and matrix compatibility. Therefore, this review provides a comprehensive and application-oriented perspective on the multifunctional utilization of SCG as a sustainable filler, highlighting matrix-dependent advantages, structure property relationships, and performance trade-offs that enable its tailored use in active, biodegradable, and functional packaging as well as related film-based applications.
Integrated ultrafiltration and pervaporation process using PDMS/ZnO-modified PSf nanohybrid membranes for enhanced bioethanol purification from fermentation broth Tutuk Djoko Kusworo, Febio Dalanta, Dita Aulia Azizah, Adrian Nataldipa Putra, Tasya Paramita Hendratmo, Muhammad Itsar Hanif, Ilham Alkian, Tonny Agustiono Kurniawan Case Studies in Chemical and Environmental Engineering, 2025 Bioethanol is a promising alternative to fossil fuels, but its separation from water remains challenging due to the presence of the azeotropic point. This study investigates a pervaporation membrane comprising a polydimethylsiloxane (PDMS) selective layer supported on a polysulfone (PSf) layer modified with ZnO nanoparticles. The optimized pervaporation membrane with 3 wt% PDMS and 1 wt% ZnO, achieved a stable flux of 1014.45 g m −2 h −1 and a separation factor of 3.96 at 50 °C. Pretreatment using ultrafiltration removed most of impurities reached 100 % and 67 % for yeast and glucose, respectively, significantly improving the membrane's performance and operational stability. This integrated ultrafiltration-pervaporation process offers an efficient process for bioethanol purification. • ZnO in the PSf matrix altered morphology, preventing intrusion layer formation. • High-quality ZnO nanocrystals enhanced the membrane's mechanical properties. • Optimal 3 wt-% PDMS/PSf-ZnO 1 wt-% showed minimal permeance trade-offs. • Integrated UF-PV module efficiently separated ethanol-water from BFB at 50 °C.
