A temperature-responsive poly(vinyl alcohol) gel for controlling fluidity of an inorganic phase change material

2017 ◽  
Vol 5 (24) ◽  
pp. 12474-12482 ◽  
Author(s):  
Parvin Karimineghlani ◽  
Emily Emmons ◽  
Micah J. Green ◽  
Patrick Shamberger ◽  
Svetlana A. Sukhishvili
Keyword(s):  
Heat Exchange ◽  
Phase Change ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Lithium Nitrate ◽  
Temperature Responsive ◽  
Nitrate Trihydrate ◽  
Pva Gel ◽  
Response To Temperature ◽  
Change Material

A temperature-responsive PVA gel is achieved that reversibly holds fluid lithium nitrate trihydrate and releases it in response to temperature for easy gelling in-place and later removal from heat-exchange modules.

Fabrication and characterization of in situ cross-linked electrospun Poly(vinyl alcohol)/phase change material nanofibers

Solar Energy ◽  
2021 ◽  
Vol 213 ◽  
pp. 339-349
Author(s):  
Lan Zhou ◽  
Feng Shi ◽  
Guojin Liu ◽  
JingPeng Ye ◽  
PengShuai Han ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Fabrication And Characterization ◽  
Change Material

Flexible monolithic phase change material based on carbon nanotubes/chitosan/poly(vinyl alcohol)

2020 ◽  
Vol 397 ◽  
pp. 125330 ◽  
Author(s):  
Piao Cheng ◽  
Hongyi Gao ◽  
Xiao Chen ◽  
Yuanyuan Chen ◽  
Mengyi Han ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Phase Change ◽  
Phase Change Material ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Change Material

scholarly journals Linear Dynamic Viscoelasticity of Dual Cross-Link Poly(Vinyl Alcohol) Hydrogel with Determined Borate Ion Concentration

Gels ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 71
Author(s):  
Takuro Taniguchi ◽  
Kenji Urayama
Keyword(s):  
Vinyl Alcohol ◽  
Ion Concentration ◽  
Poly Vinyl Alcohol ◽  
Relaxation Dynamics ◽  
Cross Link ◽  
Dynamic Viscoelasticity ◽  
Linear Dynamic ◽  
Cross Links ◽  
Pva Gel ◽  
Pva Hydrogel

We investigated the linear dynamic viscoelasticity of dual cross-link (DC) poly(vinyl alcohol) (PVA) (DC-PVA) hydrogels with permanent and transient cross-links. The concentrations of incorporated borate ions to form transient cross-links in the DC-PVA hydrogels (CBIN) were determined by the azomethine-H method. The dynamic viscoelasticity of the DC-PVA hydrogel cannot be described by a simple sum of the dynamic viscoelasticity of the PVA gel with the same permanent cross-link concentration and the PVA aqueous solution with the same borate ion concentration (CB = CBIN) as in the DC-PVA gel. The DC-PVA hydrogel exhibited a considerably higher relaxation strength, indicating that the introduction of permanent cross-links into temporary networks increases the number of viscoelastic chains with finite relaxation times. In contrast, the relaxation frequency (ωc) (given by the frequency at the maximum of loss modulus) for the DC-PVA hydrogel was slightly lower but comparable to that for a dilute PVA solution with the same CB. This signifies that the relaxation dynamics of the DC-PVA hydrogels is essentially governed by the lifetime of an interchain transient cross-link (di-diol complex of boron). The effect of permanent cross-linking on the relaxation dynamics was observed in the finite broadening of the relaxation-time distribution in the long time region.

Temperature Responsive Gels Based on Pluronic F127 and Poly(vinyl alcohol)

2011 ◽  
Vol 50 (7) ◽  
pp. 4199-4206 ◽  
Author(s):  
Maria Bercea ◽  
Raluca Nicoleta Darie ◽  
Loredana Elena Niţă ◽  
Simona Morariu
Keyword(s):  
Vinyl Alcohol ◽  
Pluronic F127 ◽  
Poly Vinyl Alcohol ◽  
Temperature Responsive ◽  
Responsive Gels
Sign in / Sign up

Export Citation Format

Share Document