scholarly journals Activation of ice recrystallization inhibition activity of poly(vinyl alcohol) using a supramolecular trigger

2016 ◽  
Vol 7 (9) ◽  
pp. 1701-1704 ◽  
Author(s):  
Daniel J. Phillips ◽  
Thomas R. Congdon ◽  
Matthew I. Gibson
Keyword(s):  
Vinyl Alcohol ◽  
Supramolecular Assembly ◽  
Antifreeze Protein ◽  
External Control ◽  
Poly Vinyl Alcohol ◽  
Inhibition Activity ◽  
Ice Recrystallization Inhibition ◽  
Ice Recrystallization ◽  
Recrystallization Inhibition

External control over the antifreeze protein mimetic activity of poly(vinyl alcohol) is enabled by Fe3+ driven supramolecular assembly.

scholarly journals Enhancing the Freeze-Thaw Durability of Concrete Through Ice Recrystallization Inhibition by Poly(vinyl Alcohol)

2019 ◽  
Author(s):  
Zhengyao Qu ◽  
Shuaiqi Guo ◽  
Christian C. M. Sproncken ◽  
Romà Surís-Valls ◽  
qingliang yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Vinyl Alcohol ◽  
Cement Hydration ◽  
Poly Vinyl Alcohol ◽  
Seasonal Temperature ◽  
Ice Recrystallization Inhibition ◽  
Ice Recrystallization ◽  
Freeze Thaw ◽  
Recrystallization Inhibition ◽  
Durability Of Concrete

Frost weathering of porous materials caused by seasonal temperature changes is a major source of damage to the world’s infrastructure and cultural heritage. Here we investigate poly(vinyl alcohol) (PVA) addition as a means to enhance the freeze-thaw durability of concrete without compromising its structural or mechanical integrity. We evaluate the ice recrystallization inhibition activity of PVA in a cementitious environment and the impact of PVA on key structural and mechanical properties, such as cement hydration (products), microstructure, strength, as well as freeze‑thaw resistance. We find that a low amount of PVA significantly reduces the surface scaling of concrete and displays excellent ice recrystallization inhibition in the saturated Ca(OH)<sub>2 </sub>solution which has a similar pH value as cement pore solution, while it does not affect cement hydration, microstructure, nor its mechanical properties. These findings contribute to new insights on freeze-thaw damage mechanism and more importantly we disclose a new direction for the design of concrete with excellent freeze‑thaw resistance.

scholarly journals Enhancing the Freeze–Thaw Durability of Concrete through Ice Recrystallization Inhibition by Poly(vinyl alcohol)

ACS Omega ◽  
2020 ◽  
Vol 5 (22) ◽  
pp. 12825-12831
Author(s):  
Zhengyao Qu ◽  
Shuaiqi Guo ◽  
Christian C. M. Sproncken ◽  
Romà Surís-Valls ◽  
Qingliang Yu ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Ice Recrystallization Inhibition ◽  
Ice Recrystallization ◽  
Freeze Thaw ◽  
Recrystallization Inhibition ◽  
Durability Of Concrete
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