文献类型： 外文期刊

作者： Jarnthong, Methakarn ¹ ; Wannalak, Aonjira ² ; Masa, Abdulhakim ³ ; Thongnuanchan, Bencha ² ; Saito, Hiromu ⁴ ; Soontaranon, Siriwat ⁵ ; Sakai, Tadamoto ⁶ ; Lopattananon, Natinee ² ;

作者机构： 1.Chinese Acad Trop Agr Sci, Key Lab Nat Rubber Proc, Agr Prod Proc Res Inst, Zhanjiang, Peoples R China

2.Prince Songkla Univ, Fac Sci & Technol, Dept Rubber Technol & Polymer Sci, Pattani campus, Pattani 94000, Thailand

3.Prince Songkla Univ, Dept Interdisciplinary Engn, Rubber Engn Program, Fac Engn, Hat Yai, Thailand

4.Tokyo Univ Agr & Technol, Dept Organ & Polymer Mat Chem, Tokyo 1848588, Japan

5.Synchrotron Light Res Inst, Nakhon Ratchasima, Thailand

6.Shizuoka Univ, Org Innovat & Social Collaborat, Shizuoka, Japan

关键词： cellulose nanofibers; natural rubber; reinforcement effect; silane modification; strain-induced crystallization

期刊名称：POLYMER COMPOSITES （ 影响因子：4.7； 五年影响因子：4.5 ）

ISSN： 0272-8397

年卷期： 2025 年 46 卷 11 期

页码：

收录情况： SCI

摘要： Nanocomposites of cellulose nanofiber (CNF) and natural rubber (NR) have been regarded as promising soft biomaterials for industrial products. However, the CNF was unsatisfactory for NR reinforcement because of poor mixing between CNF and NR. In this study, we explored the combined use of silane-treated CNF and epoxidized natural rubber (ENR20, 20% epoxide content) to enhance the compatibility and reinforcing ability of CNF in NR-based nanocomposites. The CNF/ENR20 nanocomposites containing 5 phr of CNF were prepared via an eco-friendly latex mixing method. Structural observation showed all the CNF/ENR20 nanocomposites exhibited nano-aggregated CNFs consisting of intertwined nanofibers with varying sizes depending on the types of CNFs. The addition of untreated CNFs (U-CNFs) and silane-treated CNFs significantly improved the modulus and tensile strength of the ENR20, notably with U-CNFs. The U-CNFs led to a remarkable 75% increase in tensile strength due to mutual entanglement between nano-aggregated U-CNF and ENR as well as hydrogen bonding despite larger aggregates. Novel model describing the effect of CNF rotation and strong CNF-ENR adhesion on strain-induced crystallization was revealed through WAXS/SAXS in ENR20 composites. Based on these findings, the morphological design with key structure of CNF nano-aggregates enabled the development of high performance CNF-reinforced rubber nanocomposites.Highlights CNFs (13 nm) were modified using two types of alkoxy silanes. 5 phr CNFs significantly enhanced the mechanical properties of ENR20. CNF rotation during stretching promoted molecular orientation. U-CNFs reinforced ENR20 due to mutual entanglement and H-bonding. A new model was proposed for strain-induced crystallization process of U-CNF/ENR.