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混合生物填料与改性天然橡胶对天然橡胶复合材料性能的协同效应

Synergistic Effects of Hybrid Bio-Fillers and Modified Natural Rubber on Natural Rubber Composite Properties.

作者信息

Inphonlek Supharat, Bureewong Namthip, Kotchapradit Supawat, Ruksakulpiwat Yupaporn, Ruksakulpiwat Chaiwat

机构信息

School of Polymer Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.

Research Center for Biocomposite Materials for Medical Industry and Agricultural and Food Industry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.

出版信息

Polymers (Basel). 2025 Feb 26;17(5):632. doi: 10.3390/polym17050632.

DOI:10.3390/polym17050632
PMID:40076124
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11902683/
Abstract

This work aims to investigate the synergistic effects of hybrid bio-fillers and compatibilizers on the properties of natural rubber composites. Rice husk silica (RSi) and hydroxyapatite (HA), derived from rice husk ash and seabass fish scales, respectively, were successfully prepared and used as bio-fillers. Poly(acrylic acid-co-acrylamide)-grafted deproteinized natural rubber (gDPNR) was synthesized via emulsion graft copolymerization, achieving a grafting efficiency and grafting percentage of 15.94 and 4.23%, respectively. The gDPNR was utilized as a compatibilizer in the preparation of natural rubber composites. The addition of hybrid bio-fillers at an RSi-to-HA ratio of 25:75 exhibited superior mechanical properties compared to composites containing a single filler. The incorporation of gDPNR improved filler dispersion and interfacial adhesion between the NR matrix and the bio-fillers, further enhancing the mechanical, thermal, and dielectric properties. The composite with hybrid bio-fillers and 10 phr of gDPNR exhibited the highest tensile strength, showing a 2.10-fold and 1.06-fold improvement over neat natural rubber composite and hybrid filler composite without compatibilizer, respectively. The presence of polar functional groups in gDPNR enhanced the dielectric constant of the natural rubber composites. These composites could have potential in sustainable industrial applications, including flexible electronics and eco-friendly devices.

摘要

本工作旨在研究混合生物填料和增容剂对天然橡胶复合材料性能的协同效应。分别从稻壳灰和海鲈鱼鳞片中成功制备出稻壳二氧化硅（RSi）和羟基磷灰石（HA），并将其用作生物填料。通过乳液接枝共聚合成了聚（丙烯酸 - 共 - 丙烯酰胺）接枝脱蛋白天然橡胶（gDPNR），接枝效率和接枝率分别达到15.94%和4.23%。gDPNR被用作制备天然橡胶复合材料的增容剂。与含有单一填料的复合材料相比，以25:75的RSi与HA比例添加混合生物填料表现出优异的机械性能。gDPNR的加入改善了填料在天然橡胶（NR）基体与生物填料之间的分散性和界面粘附性，进一步提高了机械、热和介电性能。含有混合生物填料和10份gDPNR的复合材料表现出最高的拉伸强度，分别比纯天然橡胶复合材料和不含增容剂的混合填料复合材料提高了2.10倍和1.06倍。gDPNR中极性官能团提高了天然橡胶复合材料的介电常数。这些复合材料在可持续工业应用中具有潜力，包括柔性电子和环保器件。

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