Matéria (Rio de Janeiro), Journal Year: 2024, Volume and Issue: 29(4)
Published: Jan. 1, 2024
Language: Английский
Journal of Composites Science, Journal Year: 2025, Volume and Issue: 9(1), P. 47 - 47
Published: Jan. 19, 2025
The long-term usage of polymer products necessitates addressing the appropriate preservation their low oxidation state that extends warranty period. addition pertinent stabilization components into composite formulations (synthesis and natural antioxidants, pristine doped oxides, clays or couples them) produces an improvement in kinetic parameters characterizing accelerated degradation occurs during high-energy exposures. competition between material ageing mitigation is controlled by protection efficiency. In this paper, main advantages inorganic structures comparison to classical organic antioxidants are emphasized. A significant stability, simultaneously associated with enhancing functional characteristics, lack migration, cost easy accessibility, make reevaluation certain fillers as stabilizers appropriate. correlation properties filler nature materials may be reconsidered for assessment participation capability inhibition inactivation free radicals. lifetimes intermediates extended activities compounds increased means electrical interactions involving unpaired electrons molecular fragments. These physical contributions reflected chemical stability. An essential feature presented options a strong impact on recycling technologies polymers radiation processing. Plastic products, including all categories macromolecular materials, can gain durability through alternative protection.
Language: Английский
Citations
1
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 22, 2025
Abstract Dynamic covalent polymer networks (DCPN) provide an important solution to the challenging recyclability of thermoset elastomers. However, dynamic bonds exhibit relatively weak bond energies, considerably decreasing mechanical properties DCPN. Herein, a novel reinforcement strategy for DCPN involving in situ formation supramolecular organic nanofillers through asynchronous polymerization is proposed. Owing difference reactivity isocyanate groups and gradual deblocking aldimine, cross‐linking hexamethylene diisocyanate isocyanate‐terminated prepolymer containing oxime–urethane with deblocked tris(2‐aminoethyl)amine facilitates transition from molecular interpenetration chains into immiscible polymerization. This results thermodynamic incompatibility between hyperbranched clusters long chains, inducing spontaneous nanofillers. Compared traditional strategies, improve Furthermore, interactions enable network excellent recyclability. The unique prepared allow their combination carbon fibers (CF) form CF composites outstanding personal‐protection applications, achieving composite upcycling. study offers on upcycling high‐performance composites.
Language: Английский
Citations
1
Progress in Organic Coatings, Journal Year: 2025, Volume and Issue: 201, P. 109101 - 109101
Published: Feb. 3, 2025
Language: Английский
Citations
1
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(48)
Published: July 20, 2024
Abstract Multifunctional recyclable glassy polymeric materials (GPMs) are sustainable substitutes for high‐performance protective in aerospace, transportation, construction, and electronics; however, only a few such have been reported. This study presents novel material design including the modular utilization of self‐reinforcing polysilsesquioxane (POSS), self‐enrichment strategy to integrate multifunctions GPMs. Specifically, rigid thiol‐capped POSS (module 1) connected with isocyanate‐terminated polyurethane precursors 2) by forming dynamic thiourethane covalent bonds fabricate Particularly, based on construction strategy, functional module 3 can be introduced endow GPMs programmable multifunctionality. Demonstrating remarkable properties, high transparency (>85% transmittance), hardness (up 5H), good flexibility, exceptional wear resistance, these also exhibit impressive shape reconfigurability robustness after numerous thermal recycling or remolding cycles. Moreover, introduction (e.g., polydimethylsiloxane prepolymer) self‐enrich onto surface anti‐liquid adhesion, self‐cleaning, deicing properties while having slight impact their mechanical properties. universal tunable approach future multifunctional applicable flexible electronics, aircraft vehicles, architectural windows.
Language: Английский
Citations
6
Progress in Organic Coatings, Journal Year: 2024, Volume and Issue: 197, P. 108832 - 108832
Published: Sept. 29, 2024
Language: Английский
Citations
6
Published: Jan. 1, 2025
Siloxane coatings can be applied via simple and low-cost sol-gel process, exhibit high mechanical strength abrasion resistance, making them suitable for wide range of industrial use. However, acquiring optical transparency maintaining properties while provide functional properties, like hydrophobicity, remain a challenge. In this study, highly transparent resistant with improved hydrophobicity enhanced elastic recovery were developed by combining both organic inorganic precursors. The effect precursor ratios on the such as transmittance, haze yellowness index, well including hardness, young's modulus, elasticity resistance hybrid organic-inorganic siloxane deposited polycarbonate flow-coating was examined. Chemical, morphological, analyses done FTIR, XPS, UV/vis spectroscopy, hazemeter, confocal microscopy, contact angle, Taber abrasion, pencil hardness nanoindentation. We achieved minimal 0.44% transmittance ~83% within 400nm to 700nm wavelength range, increased only 0.93% after 1,000 cycle abrasion. Also, water angles ~112ο inclusion Amino-POSS nanoparticles. These findings indicate that show significant potential abrasion-resistant multifunctional coatings.
Language: Английский
Citations
0
Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 105771 - 105771
Published: Jan. 1, 2025
Language: Английский
Citations
0
Polymer-Plastics Technology and Materials, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 27
Published: Feb. 10, 2025
Language: Английский
Citations
0
Small, Journal Year: 2025, Volume and Issue: unknown
Published: March 7, 2025
Organic-inorganic thermosetting hybrids, featuring unique self-ceramization abilities and excellent thermal-oxidative stabilities, are garnering substantial interest as candidates for thermal protection in extreme environments. However, designing a groundbreaking hybrid with molecular-scale bicontinuous network remains formidable challenge. In this work, novel approach is proposed to prepare hybrids the aid of an organic-inorganic covalent-ionic molecule: 3-carboxyphenylboronic acid (3-CPBA) functionalized calcium phosphate oligomer (CPO), named 3-BAPO. By tailoring supramolecular interactions between 3-BAPO boron-phenolic resin (BPR), series precursors successfully obtained, designated 3-BRPO, varying inorganic contents (13.5-25.9 wt%). The undergo concurrent ionic crosslinking organic phenolic curing synchronously under reasonable conditions, resulting formation network. Multiple chemical components drive network, imparting superior high-temperature oxidation resistance 3-BRPO achieved by situ ceramization continuous phase at ultrahigh temperatures. This work demonstrates strategy avoid separate nucleation phases employing organic-functionalized oligomers components, providing promising platform molecular engineering advanced materials.
Language: Английский
Citations
0
Progress in Organic Coatings, Journal Year: 2025, Volume and Issue: 204, P. 109263 - 109263
Published: March 26, 2025
Language: Английский
Citations
0