The Impact of High-Speed Crushing Process of Fibrous Polytetrafluoroethylene on Pyrolyzed Carbon Black/Natural Rubber Composites.

IF 4.9 3区工程技术 Q1 POLYMER SCIENCE Polymers Pub Date : 2025-01-17 DOI:10.3390/polym17020222

Zheng Gong, Yao Xiao, Yukun Zhou, Donglin Zhu, Baochang Dai, Ziyang Wang, Chuansheng Wang, Huiguang Bian

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Abstract

This study employed a high-speed rotating crushing process to modify pyrolyzed carbon black (CBp) using self-lubricating and low-friction polytetrafluoroethylene (PTFE). The effects of PTFE content on the dispersion, mechanical properties, wear resistance, and thermal stability of modified PTFE-CBp/natural rubber (NR) composites were investigated. The rotating crushing process from the high-speed grinder altered the physical structure of PTFE, forming tiny fibrous structures that interspersed among the CBp particles. This arrangement encouraged the alignment of CBp particles in specific directions and improved the surface activity of CBp, enhancing the dispersion of CBp within the NR matrix and consequently improving wear resistance. The experimental results indicated that as the amount of PTFE fibers increased, the hardness, wear resistance, and thermal stability of the PTFE-CBp/NR composite significantly improved. Compared to untreated CBp/NR composites, the hardness, modulus at 300%, and wear resistance of the 3 phr PTFE-CBp/NR composites increased by 20%, 24%, 21%, respectively, achieving the preparation of highly wear-resistant CBp/NR composites.

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纤维聚四氟乙烯高速破碎工艺对热解炭黑/天然橡胶复合材料的影响。

采用高速旋转破碎工艺，采用自润滑低摩擦聚四氟乙烯（PTFE）改性热解炭黑（CBp）。研究了聚四氟乙烯（PTFE）含量对改性PTFE- cbp /天然橡胶（NR）复合材料分散性、力学性能、耐磨性和热稳定性的影响。高速研磨机的旋转破碎过程改变了聚四氟乙烯的物理结构，形成微小的纤维结构，散布在CBp颗粒中。这种排列促进了CBp颗粒在特定方向上的排列，提高了CBp的表面活性，增强了CBp在NR基体中的分散，从而提高了耐磨性。实验结果表明，随着PTFE纤维用量的增加，PTFE- cbp /NR复合材料的硬度、耐磨性和热稳定性显著提高。与未经处理的CBp/NR复合材料相比，3phr PTFE-CBp/NR复合材料的硬度、300%模量和耐磨性分别提高了20%、24%和21%，实现了高耐磨CBp/NR复合材料的制备。

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来源期刊

Polymers POLYMER SCIENCE-

CiteScore

8.00

自引率

16.00%

发文量

4697

审稿时长

1.3 months

期刊介绍： Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.