Preparation of Sodium Chloride Anti-Icing Agent Encapsulated by Polymethylsiliconate for Pavement Anti-Icing Coating

Roads treated with conventional salt-based anti-icing agents (AIAs) rapidly release the salt to the road surface, leading to some problems with respect to road surface and infrastructure. Such limitations can be mitigated by using commercial AIAs, but any detailed information about the AIAs themselves is unknown. Furthermore, application of the AIA to pavement anti-icing coating (PAC) has not been reported in the literature. In this research, a NaCl-encapsulated by polymethylsiliconate AIA was prepared from NaCl and sodium methylsiliconate via sol–gel synthesis at various conditions, and used in preparing PAC. The optimum NaCl content, reaction temperature, and stirring speed for the preparation of the AIA were found to be 15%, 20°C, and 800 rpm, respectively. The resulting PAC prepared using the AIA exhibited the largely improved anti-icing performances under various conditions while maintaining other properties including abrasion resistance, mechanical strength, flexibility and durability.