Enhanced Anti‐Migration of Organic Antioxidants via Chitosan‐Encapsulated Ultrathin Intercalated Layered Double Hydroxides Fabricated by a Nucleation‐Encapsulation Coupling Strategy DOI
Zijia Li,

Menghua Zhao,

Guan Jun

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Antioxidants play a crucial role in inhibiting polypropylene (PP) oxidative damage and extending polymer lifetime. However, the high migration rate limited efficiency reduced protection, often requiring overdosing, which raises environmental health issues. Herein, more sustainable solution involves an ultrathin antioxidant intercalated layered double hydroxides (LDHs) with chitosan (CS) encapsulation to block antioxidants by tuning CS molecular weight fully encapsulate LDH unit. The optimized inhibits without hindering interlayer diffusion of radicals, thereby providing better protection for PP. 200kCS‐3L‐LDH/PP low phenolic (3,5‐Di‐tert‐butyl‐4‐hydroxyphenylpropionic acid, abbreviated as DBHP) encapsulated MW = 200k at level 11.6% (actual percentage weight), demonstrates ratio 8.17% after 204 h ethanol 60 °C overlong thermal aging resistance time (1920 min) under air, surpassing conventional most resistant product currently on market 1010/PP (46.0% 640 min, respectively). Such “Russian doll” structure offers promising way enhance PP excellent anti‐migration antioxidative performance, while valuable strategy design controlled release if desired species LDHs.

Language: Английский

Enhanced Anti‐Migration of Organic Antioxidants via Chitosan‐Encapsulated Ultrathin Intercalated Layered Double Hydroxides Fabricated by a Nucleation‐Encapsulation Coupling Strategy DOI
Zijia Li,

Menghua Zhao,

Guan Jun

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Antioxidants play a crucial role in inhibiting polypropylene (PP) oxidative damage and extending polymer lifetime. However, the high migration rate limited efficiency reduced protection, often requiring overdosing, which raises environmental health issues. Herein, more sustainable solution involves an ultrathin antioxidant intercalated layered double hydroxides (LDHs) with chitosan (CS) encapsulation to block antioxidants by tuning CS molecular weight fully encapsulate LDH unit. The optimized inhibits without hindering interlayer diffusion of radicals, thereby providing better protection for PP. 200kCS‐3L‐LDH/PP low phenolic (3,5‐Di‐tert‐butyl‐4‐hydroxyphenylpropionic acid, abbreviated as DBHP) encapsulated MW = 200k at level 11.6% (actual percentage weight), demonstrates ratio 8.17% after 204 h ethanol 60 °C overlong thermal aging resistance time (1920 min) under air, surpassing conventional most resistant product currently on market 1010/PP (46.0% 640 min, respectively). Such “Russian doll” structure offers promising way enhance PP excellent anti‐migration antioxidative performance, while valuable strategy design controlled release if desired species LDHs.

Language: Английский

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