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Photoaging behavior of black mulch films: the dual roles of carbon black

Journal of Hazardous Materials 2026 Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Zhimin Gong, Yanqi Shi, Yanqi Shi, Yanqi Shi, W. Shao, Zhimin Gong, Yanqi Shi, Yanqi Shi, Yanqi Shi, W. Shao, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Houru Cheng, Hexinyue Huang, Hexinyue Huang, Houru Cheng, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Hexinyue Huang, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Shixiang Gao Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Kefu Ye, Zhimin Gong, Xingqi Chen, Hexinyue Huang, Yanqi Shi, Yanqi Shi, M. Xie, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Hexinyue Huang, Yanqi Shi, Yanqi Shi, Zhimin Gong, Zhimin Gong, Zhimin Gong, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, M. Xie, Xingqi Chen, Zhimin Gong, Zhimin Gong, Zhimin Gong, Mengdi Wang, Xingqi Chen, Zhimin Gong, Hexinyue Huang, Shixiang Gao Shixiang Gao Shixiang Gao Yanqi Shi, Shixiang Gao Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Kefu Ye, Zhimin Gong, Xingqi Chen, Shixiang Gao Shixiang Gao Shixiang Gao Shixiang Gao Shixiang Gao Shixiang Gao Kefu Ye, Shixiang Gao Shixiang Gao, Shixiang Gao Shixiang Gao Kefu Ye, Shixiang Gao Zhimin Gong, Zhimin Gong, Shixiang Gao, Mengdi Wang, Yanqi Shi, Yanqi Shi, Shixiang Gao Shixiang Gao, Shixiang Gao Shixiang Gao

Summary

Researchers compared the UV-induced aging of black polyethylene mulch film (containing carbon black) and transparent mulch film, finding that carbon black initially acts as an antioxidant but ultimately accelerates aging by generating hydroxyl radicals, making black mulch a higher risk for microplastic release than transparent alternatives.

Black low density polyethylene mulch film (CBLDPE), containing carbon black (CB) as a key colorant and UV absorber, is a major source of agricultural microplastic (MP) pollution. However, the complex role of CB in the photoaging of thin mulch films (MFs) remains unclear. This study systematically investigated the photoaging behavior of CBLDPE and transparent LDPE MFs (TLDPE) under irradiation, focusing on the complex role of CB. Results showed CBLDPE exhibited three aging phases of initiation, rapid growth, and dynamic stabilization, whereas TLDPE underwent delayed aging. Their macroscopic mechanical differences are minimal. However, nanoscale crack propagation, hardness, and modulus in the aging process increased more in CBLDPE than in TLDPE, likely due to CB. Initially, CB acted as an antioxidant, but as oxygen content increased, its pro-aging effect was dominated by generating hydroxyl radicals (·OH). Research suggested that CBLDPE had a higher risk of MP release. TLDPE experienced mechanical degradation before visible oxidation or pore formation. Photoaging altered CB's structure and thermal stability, and peeling of the oxidation layer weakened its anti-aging efficiency. This study sheds light on the vital influence and mechanism of CB on the photoaging behavior of MFs, offering new insights into their geochemical behavior and environmental risks.

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