Investigation of Compatibility of Fluorine-Acrylic Emulsion and Sulphoaluminate Cement in the Design of Composite Coating: Effects of Sorbitol and Its Mechanism

Abstract

Both fluorine-acrylic (FA) emulsion and sulphoaluminate cement (CSA) have been proved as satisfactory marine engineering materials, and a better performance can be expected by their combined use. However, their compatibility has rarely been researched. In this study, the effects of sorbitol and its mechanism are investigated by the cement paste fluidity, rheological property, tensile strength, water absorption and scanning electron microscopy (SEM) tests. The results showed that, compared with sodium tripolyphosphate, borax and sodium gluconate, sorbitol can significantly improve the double electric layer of FA, and the absolute value of Zeta potential was increased by 25% compared with the blank sample without any retarder added. With the increase of sorbitol dosage, the fluidity, rheological behavior, tensile strength and water absorption sharply changed first and then tended to be stable after sorbitol dosage reached the optimal dosage of 0.25% for the compatibility improvement. The morphology analysis also proved its advantages, but the more significant improvement can be ensured by a larger polymer to cement ratio (p/c) value. Finally, the mechanism hypothesis is proposed. The film formation rate of the emulsion matches the hydration rate of the cement, due to sorbitol addition.

Fluorinated acrylic monomer modified core-shell polyacrylate latex particles: Preparation, properties and characterizations

“…The peaks at 1456 and 1384 cm -1 correspond to the vibration bending of -CH3 and -CH2 [29,46]. Further observation found that compared with the spectrum of F0, F4 has wider peaks between 1116 ~ 1158 cm -1 [47], which can be ascribed to the strong absorption of the C-O-C group being overlapped by the stretching vibration of the C-F band [30,[48][49][50].…”

Obtaining zeolite A from filtrate of zeolite LSX and its influence on the removal of heavy metals and organic pollutants in spent lubricating oil

“…The filtrate produced from this reaction is mostly discarded. Zeolites are used in many applications such as improving the hydration properties of cement paste [11], in cements for composite coating designs [12], and removal of pollutant dyes in wastewater [13]. They can also be used as nanocomposites for dye degradation [14], inhibition of antimicrobial activities, and in microalgalimmobilized biocomposites [15].…”

Synthesis and characterisation of modified antibacterial styrene-acrylate emulsions for polymer cement waterproof coatings

“…As for waterproof coatings, they should exhibit great durability during variation of stress for a long time. To prepare films with excellent performance which can balance the contradiction between tensile strength and elongation at the break, the SA polymer to cement ratio (denoted as p / c ) is key to solve this problem (Liang et al , 2020). It can be concluded that the mechanical property of coatings films would be enhanced when the weight of the polymer is equal to cement paste ( p / c = 1) after many attempts.…”