V sodobni industriji in vsakdanjem življenju igrajo lepila in materiali za prevleke ključno vlogo . Oba gradiva lahko dosežeta učinkovito povezavo med različnimi materiali, vendar imata njihova delovna načela in scenariji aplikacij svoje prednosti .
Adhesives are a class of substances that can firmly bond two or more materials together. Its molecular chain often contains active groups such as carbamate groups or isocyanate groups, which can react chemically with active hydrogen or other groups on the surface of the substrate to form a strong chemical bond. In addition, adhesives also rely on various mechanisms such as physical adsorption and mechanical Interkalacija za doseganje vezanja . različne vrste lepil, kot so poliizocianatni lepili, poliuretanski lepili, ki vsebujejo izocianatne skupine itd.
Coating materials are materials that are coated on the surface of the substrate to form a thin film. The adhesion between the coating and the substrate is mainly formed through mechanisms such as chemical bonds, electrostatic effects, and diffusion. For example, the chemical bond theory holds that the reactive groups in the coating react with similar groups on the surface of the substrate to form a strong chemical bond; Elektrostatična teorija poudarja, da lahko interakcija med napolnjeno dvojno plastjo prevleke in površino podlage izboljša tudi oprijem .
V praktičnih aplikacijah imajo lepila in materiali za prevleke svoje prednosti . lepila lahko dosežejo močno vezanje med materiali in so primerni za zapletene strukture in dinamične stresne priložnosti; Medtem ko lahko materiali za prevleke zagotavljajo zaščito, dekoracijo in funkcionalnost ter se pogosto uporabljajo pri gradnji, elektroniki, prevozu in drugih poljih .
