Rheological and electrical percolation behaviors of polyvinyl alcohol/silver nanowire suspensions using different aspect ratio silver nanowires
Springer Science and Business Media LLC - Trang 1-10 - 2023
Tóm tắt
The rheological and electrical properties of polyvinyl alcohol (PVA)/silver nanowire (AgNW) suspensions and films are investigated with increasing AgNW concentrations, employing AgNWs with two different aspect ratios, namely 714 and 1000 (referred to as Ag714 and Ag1000, respectively). To estimate the effect of the aspect ratio on the rheological and electrical percolation behavior, the linear rheological properties of suspensions and the electrical properties of the resulting films are systematically assessed. The microstructure of the suspensions and the surface morphology of the films are visualized using optical microscope (OM) and field emission scanning electron microscope (FE-SEM), respectively. Observations from OM analyses reveal that suspensions containing higher aspect ratio AgNW (Ag1000) exhibit larger flocculated clusters, resulting from the entanglement of the nanowires. As results, PVA/Ag1000 suspensions show higher linear viscoelasticity (as indicated by G′ and G″) when compared to PVA/Ag714 suspensions. However, unlike linear viscoelasticity, the electrical conductivities of PVA/Ag1000 films are lower than those of PVA/Ag714 films. This observation is attributed to the alignment of AgNWs during coating process providing substantial deformation and rapid alignment. Furthermore, SEM images of the films confirm the importance of retaining the flocculated clusters to achieve the desired electrical properties.
Tài liệu tham khảo
Colegrove J (2014) New trends in touch. Inform Display 30(4):24–27
Wu J, Que X, Hu Q, Luo D, Liu T, Liu F, Russell TP, Zhu R, Gong Q (2016) Multi-length scaled silver nanowire grid for application in efficient organic solar cells. Adv Func Mater 26(27):4822–4828
Hong S, Lee H, Lee J, Kwon J, Han S, Suh YD, Cho H, Shin J, Yeo J, Ko SH (2015) Highly stretchable and transparent metal nanowire heater for wearable electronics applications. Adv Mater 27(32):4744–4751
Gaynor W, Hofmann S, Christoforo MG, Sachse C, Mehra S, Salleo A, McGehee MD, Gather MC, Lüssem B, Müller-Meskamp L, Peumans P, Leo K (2013) Color in the corners: ITO-free white OLEDs with angular color stability. Adv Mater 25(29):4006–4013
Jo W, Kang HS, Choi J, Lee H, Kim H-T (2017) Plasticized polymer interlayer for low-temperature fabrication of a high-quality silver nanowire-based flexible transparent and conductive film. ACS Appl Mater Interfaces 9(17):15114–15121
Lee J, Lee P, Lee HB, Hong S, Lee I, Yeo J, Lee SS, Kim T-S, Lee D, Ko SH (2013) Room-temperature nanosoldering of a very long metal nanowire network by conducting-polymer-assisted joining for a flexible touch-panel application. Adv Func Mater 23(34):4171–4176
Broadbent SR, Hammersley JM (1957) Percolation processes: I. Crystals and mazes, Cambridge University Press
Jagota M, Tansu N (2015) Conductivity of nanowire arrays under random and ordered orientation configurations. Sci Rep 5(1):10219
Peressini D, Bravin B, Lapasin R, Rizzotti C, Sensidoni A (2003) Starch–methylcellulose based edible films: rheological properties of film-forming dispersions. J Food Eng 59(1):25–32
Eley RR, Schwartz LW (2002) Interaction of rheology, geometry, and process in coating flow. J Coatings Technol 74(932):43–53
White SI, Mutiso RM, Vora PM, Jahnke D, Hsu S, Kikkawa JM, Li J, Fischer JE, Winey KI (2010) Electrical percolation behavior in silver nanowire-polystyrene composites: simulation and experiment. Adv Func Mater 20(16):2709–2716
Ariga K, Aono M (2016) Supra-materials nanoarchitectonics. William Andrew
Sepehr M, Carreau PJ, Moan M, Ausias G (2004) Rheological properties of short fiber model suspensions. J Rheol 48(5):1023–1048
Lee SH (2019) A study of polyvinyl alcohol (PVA)/metal nanowire conducting film with silica nanoparticles under various coating conditions, Pusan National University
Vaagensmith B (2016) Fully solution processed PEDOT: PSS and silver nanowire semitransparent electrodes for thin film solar cells, South Dakota State University
Zhang P, Wyman I, Hu J, Lin S, Zhong Z, Tu Y, Huang Z, Wei Y (2017) Silver nanowires: synthesis technologies, growth mechanism and multifunctional applications. Mater Sci Eng 223:1–23
Cui H-W, Jiu J-T, Suganuma K, Uchida H (2015) Super flexible, highly conductive electrical compositor hybridized from polyvinyl alcohol and silver nano wires. RSC Adv 5(10):7200–7207
Carreau PJ, Vergnes B (2015) 2 - Rheological characterization of fiber suspensions and nanocomposites. In: Chinesta F, Ausias G (eds) Rheology of non-spherical particle suspensions, Elsevier, pp 19–58
Hu G, Zhao C, Zhang S, Yang M, Wang Z (2006) Low percolation thresholds of electrical conductivity and rheology in poly (ethylene terephthalate) through the networks of multi-walled carbon nanotubes. Polymer 47(1):480–488
Barberg I, Azoulay D, Toker D, Millo O (2004) Percolation and tunneling in composite materials. Int J Modern Phys B 18(15):2091–2121
Jing X, Zhao W, Lan L (2000) The effect of particle size on electric conducting percolation threshold in polymer/conducting particle composites. J Mater Sci Lett 19(5):377–379
Lee SH, Kim SY, Salehiyan R, Hyun K (2021) Effects of silica nanoparticles on the rheological properties and morphologies of polyvinyl alcohol/silver nanowire suspensions. Korea-Australia Rheol J 33(4):321–331