Growth control of ice crystals by poly(vinyl alcohol) and antifreeze protein in ice slurries

Ice Recrystallization Inhibition and Molecular Recognition of Ice Faces by Poly(vinyl alcohol)

“…Up to now, only very few synthetic polymers have been reported that show ice recrystallization inhibition by adsorbing to ice crystals, for example poly(vinyl alcohol) (PVA) or double hydrophilic block copolymers. [14][15][16][17] However, their mechanism of action is as yet unknown. [14,18] Herein, we present experiments in which we quantify the effect of PVA on ice recrystallization and propose an adsorption mechanism that can explain the observed effects.…”

“…In addition, we study a nonadsorbing water-soluble polymer, poly(ethylene glycol) (PEG10; M w = 10 000 g mol À1 ), as a reference substance as it did not affect ice recrystallization in previous experiments. [16,17] An analysis of all experiments with additive concentrations 0.1 mg mL À1 is shown in Figure 2 b. The concentration-dependent median ice-crystal diameter after 2 h of annealing, d(c), can be described by a simple exponential model [Eq.…”

Thermal hysteresis induced by ammonium polyacrylate as antifreeze polymer

“…Moreover, when ice slurry is used as a secondary coolant, agglomeration of ice crystals is inhibited by addition of AFPs or AFGPs into the water [5,6]. Because AFPs and AFGPs are extracted from living organisms, however, they are expensive [7].…”

Modified Langmuir isotherm for a two-domain adsorbate: Derivation and application to antifreeze proteins

“…For example, hyperactive insect (Tenebrio molitor) AFP [1] has a thermal hysteresis activity of 4.1 • C at a concentration of 150 μM, whereas for the same concentration, two-domain type III (RD3) [2] and type I (winter flounder) [3] AFPs can only depress freezing point by 0.25 • C and 0.17 • C, respectively. AFPs have numerous potential applications such as cryopreservation of cells, tissues or organs, ice slurries to be used in heat exchangers, and food storage [4][5][6][7][8][9].…”