Silanization of Starch and Its Effect on Cross-Linking and Mechanical, Dynamic, Hydrophobic, and Aging Properties of Polymeric Compositions Containing Natural Rubber DOI Open Access
Konrad Mrozowski, Aleksandra Smejda-Krzewicka

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6273 - 6273

Published: Dec. 22, 2024

In recent years, the search for more sustainable fillers elastomeric composites than silica and carbon black has been underway. this work, silanized starch was used as an innovative filler composites. Corn chemically modified by silanization (with n-octadecyltrimethoxysilane) via a condensation reaction to produce hydrophobic starch. Starch/natural rubber were prepared mixing with elastomer. The morphology, hydrophobicity, chemical structure of after before modification studied. results showed that becomes (θw = 117.3°) smaller particle size. addition, FT-IR spectrum analysis confirmed attachment silane groups dispersed better in natural matrix obtained homogeneous morphology. composite achieved best dynamic (ΔG′ 203.8 kPa) mechanical properties (TSb 11.4 MPa) compositions 15 phr incorporation improved hydrophobicity 117.8°). higher content allowed achieve degree cross-linking, resulting resistance swelling organic solvents. This improvement is due enhanced elastomer–filler interactions reduced spaces prevent solvent penetration into material’s depths. good properties, well mainly interfacial between study highlights potential new approach silane-modified filler, demonstrating its ability enhance mechanical, dynamic, while supporting greener material solutions industry.

Language: Английский

Design and implementation of PLA/GO/metal oxide composites for CO2 sensing application DOI Creative Commons

Khaled S. Amin,

Mohamed M. Yassin,

Yahia M. Abdallah

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 17, 2025

Abstract This study investigates the modification of polylactic acid (PLA) by incorporation graphene oxide (GO) and metal oxides (ZnO CuO), with aim developing efficient CO₂ sensors. Key properties, including total dipole moment (TDM), energy gap (ΔE), molecular electrostatic potential (MESP), density states (DOS), were calculated using functional theory (DFT) to gain insight into interactions between composites gas. Experimental techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), optical confocal microscopy used validate material composition bonding mechanisms. The analysis revealed presence SiO₂ impurities in PLA matrix, which could potentially affect sensing behavior composite. demonstrated effective capabilities experimental tests. combined theoretical approach demonstrates that PLA/GO/metal offer significant for sustainable sensing, contributing air quality monitoring greenhouse gas regulation.

Language: Английский

Citations

2
Fiber Treatment Impact on the Thermal Behavior of Biomass/Palm-fibers Polylactic-acid Hybrid Biocomposites DOI Creative Commons
Abdelaziz Lekrine, Ahmed Belaadi,

Isma Dembri

et al.

Materials Chemistry and Physics, Journal Year: 2025, Volume and Issue: unknown, P. 130651 - 130651

Published: March 1, 2025

Language: Английский

Citations

2
Evaluation of Mechanical Energy Consumption in WPC Production from Pine (Pinus sylvestris) and Hemp (Cannabis sativa L.) with ABS Thermoplastic Additions DOI Open Access
Kamil Roman, Emilia Grzegorzewska,

Katarzyna Fedorowicz

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(21), P. 5177 - 5177

Published: Oct. 24, 2024

This study investigates lignocellulosic biocomposites’ physicochemical properties and strength parameters with varying thermoplastic content. Biocomposites were prepared using wood (Pinus sylvestris) or hemp shives (Cannabis sativa L.) combined 25% 50% ABS regranulate. The research focused on evaluating the mechanical energy consumption during compaction of wood-ABS biocomposites different pine fractions pretreated hot water extraction (HWE) analyzing relationship between Results indicate that composition mixture size fraction did not significantly influence densification. Energy values ranged from 1.234 × 10⁻8 J to 8.296 J. While densification after HWE was unsuccessful without ABS, preheating mixtures facilitated production a uniform composite. work required for 1.404 10⁻5 2.711 ABS. For 1.954 0 ÷ 0.4 (f1) 0.042 0.8.

Language: Английский

Citations

2
Silanization of Starch and Its Effect on Cross-Linking and Mechanical, Dynamic, Hydrophobic, and Aging Properties of Polymeric Compositions Containing Natural Rubber DOI Open Access
Konrad Mrozowski, Aleksandra Smejda-Krzewicka

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6273 - 6273

Published: Dec. 22, 2024

In recent years, the search for more sustainable fillers elastomeric composites than silica and carbon black has been underway. this work, silanized starch was used as an innovative filler composites. Corn chemically modified by silanization (with n-octadecyltrimethoxysilane) via a condensation reaction to produce hydrophobic starch. Starch/natural rubber were prepared mixing with elastomer. The morphology, hydrophobicity, chemical structure of after before modification studied. results showed that becomes (θw = 117.3°) smaller particle size. addition, FT-IR spectrum analysis confirmed attachment silane groups dispersed better in natural matrix obtained homogeneous morphology. composite achieved best dynamic (ΔG′ 203.8 kPa) mechanical properties (TSb 11.4 MPa) compositions 15 phr incorporation improved hydrophobicity 117.8°). higher content allowed achieve degree cross-linking, resulting resistance swelling organic solvents. This improvement is due enhanced elastomer–filler interactions reduced spaces prevent solvent penetration into material’s depths. good properties, well mainly interfacial between study highlights potential new approach silane-modified filler, demonstrating its ability enhance mechanical, dynamic, while supporting greener material solutions industry.

Language: Английский

Citations

1