화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.33, No.4, 321-331, November, 2021
DOI10.1007/s13367-021-0025-x  Export Citation
Effects of silica nanoparticles on the rheological properties and morphologies of polyvinyl alcohol/silver nanowire suspensions
Seung Hak Lee, Si Yoon Kim, Reza Salehiyan1, and Kyu Hyun†
  • School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
  • 1Department of Materials Research and Technology (MRT), Luxembourg Institute of Science and Technology (LIST), Esch-sur-Alzette 4362, Luxembourg
E-mail:
We investigated the effects of silica nanoparticles (SiNPs) on the rheological properties and microstructures of polyvinyl alcohol (PVA)/silver nanowire (AgNW) suspensions. For PVA/AgNW suspensions without SiNPs, rheological percolation threshold was calculated using storage modulus determined by small amplitude oscillatory shear (SAOS) tests. Results from SAOS tests revealed that PVA/AgNW suspensions had two transition concentrations, which led to different structure developments. Storage modulus from large amplitude oscillatory shear (LAOS) tests showed double-step strain softening behavior at all AgNW concentrations tested, and elastic stress components, also obtained by LAOS tests, exhibited trends similar to storage modulus development. Furthermore, two distinguishable structures were observed when large strain amplitude shear was applied. When SiNPs were added to PVA/AgNW suspensions, the rheological properties of PVA/AgNW suspensions from SAOS tests increased. LAOS results showed storage modulus and elastic stress components of PVA/AgNW suspensions were dependent on AgNW concentration. Doublestep strain softening disappeared for PVA/AgNW suspensions containing SiNPs at low AgNW concentrations, whereas at high AgNW concentrations double-step strain softening behavior was observed.
Keywords:polyvinyl alcohol;silver nanowire;silica nanoparticle;suspension;large amplitude oscillatory shear (LAOS);small amplitude oscillatory shear (SAOS)
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