Facile synthesis of polyaniline nanorods to simultaneously enhance the mechanical properties and wear resistance of epoxy composites

Abstract

To enhance the mechanical properties and wear resistance of epoxy resin, polyaniline nanorods were first synthesized using a facile route, and then introduced into the epoxy matrix to yield composites via solution mixing. Several measurements were conducted to investigate the phase structures and compositions of polyaniline nanorods, and their positive influences on the mechanical and tribological properties of epoxy resin were also characterized. The results confirmed that the as-synthesized polyaniline exhibited representative rod-like morphologies and dispersed well in the epoxy matrix, leading to significant enhancements in the tensile strength and elastic modulus of epoxy composites. The highest values of 110.33 MPa and 2.04 GPa were obtained by adding 5%–7% polyaniline nanorods, which were 43% and 62% higher than the pure sample, respectively. The wear rate was increased first and then decreased along with polyaniline nanorods, presenting the lowest value of 2.12 × 10⁻⁵ mm³·Nm^–1 by adding 5% filler, which was markedly reduced by ca. 70% compared to the control sample. Finally, the possible wear mechanism was proposed and discussed in detail. This study tried to broaden the applications of polyaniline nanorods in the field of tribology.

Graphical abstract

Keywords

epoxy resin / polyaniline nanorods / mechanical property / tribological performance / wear mechanism

References

[1] Azeez A A, Rhee K Y, Park S J, Hui D. Epoxy clay nanocomposites-processing, properties and applications: a review. Composites Part B: Engineering, 2013, 45(1): 308–320

[2] Wei H, Xia J, Zhou W, Zhou L, Hussain G, Li Q, Ostrikov K K. Adhesion and cohesion of epoxy-based industrial composite coatings. Composites Part B: Engineering, 2020, 193: 108035

[3] Wang H Y, Sun L Y, Wang R, Yan L, Zhu Y J, Wang C, Wang E Q. Dopamine modification of multiwalled carbon nanotubes and its influences on the thermal, mechanical, and tribological properties of epoxy resin composites. Polymer Composites, 2017, 38(1): 116–125

[4] Che Y Y, Sun Z L, Zhan R R, Wang S Z, Zhou S F, Huang J. Effects of graphene oxide sheets-zirconia spheres nanohybrids on mechanical, thermal and tribological performances of epoxy composites. Ceramics International, 2018, 44(15): 18067–18077

[5] Wei F J, Pan B L, Lopez J. The tribological properties study of carbon fabric/epoxy composites reinforced by nano-TiO₂ and MWNTs. Open Physics, 2018, 16(1): 1127–1138

[6] Esteves M, Ramalho A, Ferreira J A M, Nobre J P. Tribological and mechanical behaviour of epoxy/nanoclay composites. Tribology Letters, 2013, 52(1): 1–10

[7] Bu Y F, Xu M J, Liang H Y, Gao K X, Zhang Y H, Chen B B, Min C Y, Hua X J, Fu Y H. Fabrication of low friction and wear carbon/epoxy nanocomposites using the confinement and self-lubricating function of carbon nanocage fillers. Applied Surface Science, 2021, 538: 148109

[8] Jayanthi A, Krishna Priya R, Surakasi R, Prasad Vanam J, Puthilibai G, Santhanakrishnan M, Rajkumar S. Mechanical and tribological properties of TiC nano particles reinforced polymer matrix composites. Materials Today: Proceedings, 2022, 59: 1472–1477

[9] Zhang G L, Lu S C, Ke Y C. Effects of silica nanoparticles on tribology performance of poly(epoxy resin-bismaleimide)-based nanocomposites. Polymer Engineering and Science, 2018, 59(2): 274–283

[10] Yu J J, Zhao W J, Wu Y H, Wang D L, Feng R T. Tribological properties of epoxy composite coatings reinforced with functionalized C-BN and H-BN nanofillers. Applied Surface Science, 2018, 434: 1311–1320

[11] Cao Z F, Xia Y Q, Chen C. Fabrication of novel ionic liquids-doped polyaniline as lubricant additive for anti-corrosion and tribological properties. Tribology International, 2018, 120: 446–454

[12] Jin D D, Zhou Y, Li T, Hu S, Shen Y Y, Zhang Y W, Qin Z Y. Efficient construction and enhanced capacitive properties of interfacial polymerized polyaniline nanofibers with the assistance of isopropanol in aqueous phase. Electrochimica Acta, 2017, 257: 311–320

[13] Cao Z F, Xia Y Q. Corrosion resistance and tribological characteristics of polyaniline as lubricating additive in grease. Journal of Tribology, 2017, 139(6): 061801

[14] Lin Z, Jia X H, Li Y, Song H J, Yang J. Improved mechanical/tribological properties of polyimide/carbon fabric composites by in situ-grown polyaniline nanofibers. Materials Chemistry and Physics, 2021, 258: 123972

[15] Maurya R, Siddiqui A R, Katiyar P K, Balani K. Mechanical, tribological and anti-corrosive properties of polyaniline/graphene coated Mg-9Li-7Al-1Sn and Mg-9Li-5Al-3Sn-1Zn alloys. Journal of Materials Science and Technology, 2019, 35(8): 1767–1778

[16] Im S, Kim H J, Shin K, Jeong H Y, Hong W G, Kwon K, Hong Y J. Phytic acid-doped cross-linked polyaniline nanofibers for electrochemical supercapacitor electrode applications. Journal of the Korean Physical Society, 2019, 74(2): 145–153

[17] Yang J N, Feng X S, Nie S B, Xu Y X, Li Z Y. Self-sacrificial templating synthesis of flower-like nickel phyllosilicates and its application as high-performance reinforcements in epoxy nanocomposites. Frontiers of Chemical Science and Engineering, 2022, 16(4): 484–497

[18] Yang J N, Li Z Y, Xu Y X, Nie S B, Liu Y. Effect of nickel phyllosilicate on the morphological structure, thermal properties and wear resistance of epoxy nanocomposites. Journal of Polymer Research, 2020, 27(9): 274

[19] Huang H, Zhu W, Gao X, Liu X, Ma H. Synthesis of a novel electrode material containing phytic acid-polyaniline nanofibers for simultaneous determination of cadmium and lead ions. Analytica Chimica Acta, 2016, 947: 32–41

[20] Ben Ali M, Wang F, Boukherroub R, Lei W, Xia M. Phytic acid-doped polyaniline nanofibers-clay mineral for efficient adsorption of copper (II) ions. Journal of Colloid and Interface Science, 2019, 553: 688–698

[21] Wang K, Zhang X, Li C, Zhang H T, Sun X Z, Xu N S, Ma Y W. Flexible solid-state supercapacitors based on a conducting polymer hydrogel with enhanced electrochemical performance. Journal of Materials Chemistry A, 2014, 2(46): 19726–19732

[22] Ding H, Zhong M, Kim Y J, Pholpabu P, Balasubramanian A, Hui C M, He H, Yang H, Matyjaszewski K, Bettinger C J. Biologically derived soft conducting hydrogels using heparin-doped polymer networks. ACS Nano, 2014, 8(5): 4348–4357

[23] Elsener B, Atzei D, Krolikowski A, Rossi A. Effect of phosphorus concentration on the electronic structure of nanocrystalline electrodeposited Ni–P alloys: an XPS and XAES investigation. Surface and Interface Analysis, 2008, 40(5): 919–926

[24] Yang J N, Xu Y X, Su C, Nie S B, Li Z Y. Synthesis of hierarchical nanohybrid CNT@Ni-PS and its applications in enhancing the tribological, curing and thermal properties of epoxy nanocomposites. Frontiers of Chemical Science and Engineering, 2021, 15(5): 1281–1295

[25] Hong L H, Bin G, Feng H, Cheng D, Chun T J, Crittenden J C. Ball-milled carbon nanomaterials for energy and environmental applications. ACS Sustainable Chemistry & Engineering, 2017, 5(11): 9568–9637

[26] Hao Y S, Sani L A, Ge T J, Fang Q H. Phytic acid doped polyaniline containing epoxy coatings for corrosion protection of Q235 carbon steel. Applied Surface Science, 2017, 419: 826–837

[27] Zhou Q Q, Chen J Y, Zhou T C, Shao J Z. In situ polymerization of polyaniline on cotton fabrics with phytic acid as a novel efficient dopant for flame retardancy and conductivity switching. New Journal of Chemistry, 2020, 44(8): 3504–3513

[28] Wang K, Wu J, Ye L, Zeng H. Mechanical properties and toughening mechanisms of polypropylene/barium sulfate composites. Composites Part A, 2003, 34(12): 1199–1205

[29] Tian J, Tan Y F, Zhang Z W, Wang X L, Xu T, Tang B H. Effects of hyperbranched polyesters covalent functionalized multi-walled carbon nanotubes on the mechanical and tribological properties of epoxy composites. Materials Research Express, 2019, 7(1): 015302

[30] Yasmin A, Abot J L, Daniel I M. Processing of clay/epoxy nanocomposites by shear mixing. Scripta Materialia, 2003, 49(1): 81–86

[31] Zhou Y J, Liu M, Wang Y L, Yuan J Y, Men X H. Significance of constructed MXene@Ag hybrids for enhancing the mechanical and tribological performance of epoxy composites. Tribology International, 2022, 165: 107328

[32] Tian H L, Wang C L, Guo M Q, Cui Y J, Gao J G, Tang Z H. Microstructures and high-temperature self-lubricating wear-resistance mechanisms of graphene-modified WC-12Co coatings. Friction, 2020, 9(2): 315–331

[33] Yang J N, Xu Y X, Nie S B, Feng X S, Jiang L. Effect of organic-modified nickel phyllosilicates on the tribological, mechanical and thermal properties of epoxy composites. Journal of Materials Research and Technology, 2021, 14: 692–702

[34] Hao Y, Zhou X Y, Shao J J, Zhu Y K. The influence of multiple fillers on friction and wear behavior of epoxy composite coatings. Surface and Coatings Technology, 2019, 362: 213–219

[35] Pawlak Z, Kaldonski T, Pai R, Bayraktare E, Oloyede A. A comparative study on the tribological behaviour of hexagonal boron nitride (h-BN) as lubricating micro-particles—An additive in porous sliding bearings for a car clutch. Wear, 2009, 267(5): 1198–1202

[36] Hong J, Liu C H, Deng X, Jiang T, Gan L, Huang J. Enhanced tribological properties in core–shell structured SiO₂@GO hybrid fillers for epoxy nanocomposites. RSC Advances, 2016, 6(92): 89221–89230

[37] Suh N P. The delamination theory of wear. Wear, 1973, 25(1): 111–124

[38] Dasari A, Yu Z Z, Mai Y W. Fundamental aspects and recent progress on wear/scratch damage in polymer nanocomposites. Materials Science and Engineering: R: Reports, 2009, 63(2): 31–80

[39] Wang H Y, Wang R, Sun L Y, Liu Z J, Zhu Y X, Zhu Y J. Mechanical and tribological characteristics of carbon nanotube-reinforced polyvinylidene fluoride (PVDF)/epoxy composites. RSC Advances, 2016, 6(51): 45636–45644

Acknowledgements

The authors gratefully acknowledge the Key Research and Development Projects in Anhui Province (Grant No. 2022i01020016), National Natural Science Foundation of China (Grant No. 51775001), Outstanding Youth Scieneific Research Project in Anhui Province (Grant No. 2022AH020055).

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