Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(5), С. 113647 - 113647
Опубликована: Июль 23, 2024
Язык: Английский
Iranian Polymer Journal, Год журнала: 2023, Номер 32(11), С. 1477 - 1497
Опубликована: Авг. 19, 2023
Язык: Английский
Процитировано
23
ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 12(17), С. 6539 - 6546
Опубликована: Апрель 18, 2024
Lignin exhibits good potential in natural sunscreens, but its dark color is still an obstacle. Herein, a strategy combining ultrafiltration and ultrasonic cavitation developed to whiten enzymatic hydrolysis lignin (EHL). Results show that fractions with the smallest molecular weight possess lightest due lower bulk density fewer surface chromophores. The hydrophobic aromatic skeleton abundant phenol carboxyl groups endow fraction dispersibility reactivity. Oil chemical sunscreen actives are effectively emulsified encapsulated via cavitation. As-prepared capsules have average diameter of 269 nm whiteness index −15, representing 71% 63% improvement compared EHL EHL-based capsules. capsule-based approaches white even under dosage 10 wt %. sun protection factor reaches 96 maintains performance at both room high temperatures.
Язык: Английский
Процитировано
8
European Polymer Journal, Год журнала: 2024, Номер 213, С. 113109 - 113109
Опубликована: Май 10, 2024
Язык: Английский
Процитировано
8
International Journal of Biological Macromolecules, Год журнала: 2025, Номер 296, С. 139607 - 139607
Опубликована: Янв. 8, 2025
Язык: Английский
Процитировано
1
International Journal of Biological Macromolecules, Год журнала: 2025, Номер 303, С. 140538 - 140538
Опубликована: Янв. 31, 2025
Язык: Английский
Процитировано
1
ACS Omega, Год журнала: 2025, Номер 10(7), С. 6745 - 6752
Опубликована: Фев. 13, 2025
Lignin possesses unique natural antioxidation and UV-absorption abilities, making it a promising ingredient for sunscreen. However, the industrial lignin produced from pulping or bioethanol production generally shows low efficiency due to limited phenolic hydroxyl content poor compatibility with sunscreen, respectively. To address this issue, molten salt hydrate treatment process was carried out selective cleavage of ether bonds in lignin. After treatment, 2-fold increase observed, improved. The intermolecular forces water measured by an atomic force microscope showed significant decrease −1.46 0.46 mN/m, suggesting efficient hydrophilicity, which promoted We converted into colloidal balls, improved dispersion cream more than tripled sun protection factor compared direct addition
Язык: Английский
Процитировано
1
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 20, 2025
Abstract Utilizing biomass and CO 2 to synthesize biodegradable reusable polymeric materials is critical for addressing the dual challenges of petrochemical resource depletion environmental pollution. Among emerging alternatives, ‐based polyols (PPC) exhibit exceptional promise in replacing petroleum‐based polyols; while, lignin stands as most abundant aromatic resource. However, integrating these feedstocks produce high‐performance with combined biodegradability, recyclability, reusability remains technically demanding. In this work, a lignin‐based waterborne polyurethane adhesive (LWPU) developed using PPC low‐molecular‐weight (AOH), achieving high solid content (53.2%) outstanding overall properties. The incorporation strengthens hydrogen‐bonding networks increases crosslinking density, thereby enhancing cohesive energy density. optimized LWPU demonstrates robust adhesion on diverse substrates, lap shear strengths reaching 14.7 MPa (wood), 10.6 (steel), 9.0 (aluminum). Notably, it maintains structural integrity under extreme thermal variations (–30 °C 100 °C), high‐humidity (95% ± 5% RH), prolonged ultraviolet (UV) irradiation conditions. Further, lignin‐reinforced dynamic covalent hydrogen bonds impart recyclability adhesives. This methodology establishes sustainable pathway designing bio‐adhesives that synergistically utilize CO₂‐derived feedstocks.
Язык: Английский
Процитировано
1
ACS Applied Polymer Materials, Год журнала: 2025, Номер unknown
Опубликована: Апрель 28, 2025
Язык: Английский
Процитировано
1
ACS Omega, Год журнала: 2023, Номер 8(28), С. 25478 - 25486
Опубликована: Июль 3, 2023
In this study, the combination of sequential solvent fractionation technical Kraft lignin was followed by allylation most OH functionalities to give highly functional thermoset resins. All fractions were functionalized on phenolic (≥95%) and carboxylic acid (≥85%) a significant extent aliphatic moieties (between 43 75%). The resins subsequently cross-linked using thiol-ene chemistry. high amount allyl resulted in cross-link density. Dynamic mechanical analysis measurements showed that thioether content, directly related strongly affects performance these thermosets with glass transition temperature (Tg) between 81 95 °C storage modulus 1.9 3.8 GPa for all thermosets. lignin-based thermosets' morphology, at nanoscale, studied wide-angle X-ray scattering measurements. Two π-π stacking interactions observed: sandwich (≈4.1-4.7 Å) T-shaped (≈5.5-7.2 Å). introduction weakens interactions. A new signal corresponding distance ≈3.5 Å observed thermosets, which attributed organized structure. At same time, superstructure distance/size 7.9-17.5 samples.
Язык: Английский
Процитировано
15
Composites Science and Technology, Год журнала: 2024, Номер 251, С. 110550 - 110550
Опубликована: Март 16, 2024
Язык: Английский
Процитировано
6