Aerosol cooling element, application thereof and filter rod capable of being used for heating cigarette

An aerosol cooling element is formed by free accumulation of cellulose acetate sheets, and the cellulose acetate sheets are separated from each other. The width of the cellulose acetate sheet ranges from 2 mm to 5 mm, the length of the cellulose acetate sheet ranges from 4 mm to 25 mm, and the thickness of the cellulose acetate sheet ranges from 0.2 mm to 1 mm. The cellulose acetate sheet comprises cellulose acetate and a modifier. The modifier comprises a plasticizer and/or polyol. The invention further discloses a preparation method of the cellulose acetate sheet and a filter rod capable ofbeing used for heating cigarettes, the aerosol cooling element is adopted in a cooling section, and a hollow section, the aerosol cooling element and a mouthpiece section are sequentially connected inthe axis direction of the filter rod and are formed by wrapping forming paper. When being applied to heating cigarettes, the element has the advantages of strong high-temperature thermal deformationresistance, high material s