Natural Rubber Composites With Dual Mechanical and Antioxidant Properties Enabled by Orange Peel Hydrolyzates

文献类型： 外文期刊

第一作者： Chen, Jing

作者： Chen, Jing;Xie, Xingtong;Huang, Guomin;Li, Chunxiang;Cai, Jinzhu;Shang, Lingyu;Du, Lijuan;Liao, Lusheng;Peng, Wenfeng;Liao, Lusheng;Peng, Wenfeng

作者机构：

关键词： hydrolyzed orange peel; mechanical properties; natural rubber; thermo-oxidative aging resistance

期刊名称：POLYMER ENGINEERING AND SCIENCE （ 影响因子：3.2； 五年影响因子：3.0 ）

ISSN： 0032-3888

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Orange peel is rich in cellulose, lignin, and natural antioxidants. In this work, an alkaline hydrolysis method combined with an in situ dispersion strategy was employed to treat orange peel powder (OPP). Subsequently, the hydrolyzed orange peel (HOP) dispersion was incorporated into natural rubber (NR) latex. NR composites were prepared: antioxidant-free (NR-xN) and with antioxidant 4010NA (NR-x), varying HOP content (x phr). The static and dynamic mechanical properties, crosslink density, and thermo-oxidative aging resistance of NR/HOP composites were tested. The results indicated that HOP serves as a significant reinforcing agent and antioxidant for NR. Notably, the addition of 2 phr of HOP to NR (NR-2) resulted in a 32% increase in tensile strength compared to the control sample (NR-0), reaching 34.5 MPa. After thermo-oxidative aging (100 degrees C, 24 h), the aged NR-2 sample achieved a tensile strength of 20.8 MPa, representing a remarkable 201% increase over NR-0. Crosslink density, tube model, and DMA analyses indicated HOP restricts NR chain mobility and enhances energy dissipation. HOP primarily interacts with NR chains mainly via physical entanglement; chemical crosslinking decreased with increasing HOP. This approach offers novel perspectives for developing high-performance bio-based rubber composites.

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