Multifunctional polyurea acid derivative as well as preparation method and application thereof

[0077] Example 1: Synthesis of Polyurea Acid Homopolymer (DL)

[0078] This embodiment provides a two-component polyurea acid homopolymer (DL) with different number of segments, which is mainly produced by solution polymerization of an isocyanate component (component B) and an amino component (component A); wherein, The isocyanate component requires that the average functional group in the polyisocyanate monomer is 2, that is, the diisocyanate monomer is lysine diisocyanate; the amino component is lysine ethyl ester dihydrochloride.

[0079] The specific preparation steps are as follows:

[0080] 1) Prepare the raw materials according to the formula, take by weighing lysine ethyl ester dihydrochloride (4.092g) three-pump tee, and add dimethylformamide (120ml), triethylamine ( 7.2~20ml) for premixing, the speed is controlled at 200~500r / rev, and the constant stirring speed is maintained at room temperature and normal pressure until it is completely dissolved;

[0081] 2) take

[0085] Example 2: Synthesis of Polyurea Acid Homopolymer (DC)

[0086] This embodiment provides a one-component polyurea-based homopolymer (DC), which is mainly produced from an amino component (component A) by a phosgene method; wherein, the amino component is cystine.

[0087] 1) Prepare the raw materials according to the formula, weigh cystine (14.418g) and add it to the reaction flask, pump three connections, add dichloromethane (60ml) under inert gas atmosphere for premixing, reduce the temperature to 0°C, Keep a constant stirring speed under normal pressure until it is completely dissolved;

[0088] 2) Weigh triphosgene (5.927g), dissolve in dichloromethane;

[0089] 3) Under an inert gas atmosphere, add triphosgene dropwise to the reaction flask at 0°C to react with A for 15min, and then react at room temperature for 8h;

[0090] 4) After the reaction is finished, the product is poured into a Buchner funnel for suction filtration, and the dichloromethane and water therei

[0091] Example 3: Synthesis of Polyurea Acid Alternating Copolymer (DLL)

[0092] This embodiment provides a two-component polyurea-based alternating copolymer (DLL), which is mainly produced by solution polymerization of an isocyanate component (component B) and an amino component (component A); wherein, the isocyanate component lysine diisocyanate was selected for the sub-component; lysine was selected for the amino component.

[0093] The specific preparation steps are as follows:

[0094] 1) Prepare the raw materials according to the formula, weigh lysine (2.422g) with three-pump tee, add dimethylformamide (120ml) to the reaction flask under inert gas atmosphere for premixing, and control the rotation speed at 200~500r / Rotate, keep constant stirring speed at room temperature and normal pressure until completely dissolved;

[0095] 2) take by weighing lysine diisocyanate (5.587g), ensure that the molar feeding ratio of component A and component B is 1:1, dilute with pre-d