Skin-touch antiviral interior wall coating and preparation method thereof

Abstract

The invention relates to the technical field of interior wall coatings, in particular to a skin-touch antiviral interior wall coating and a preparation method thereof. The core improvement point of the invention is as follows: an intelligent repair and antiviral synergistic system (SRADS) is firstly prepared, and then the system is introduced into a basic coating formula at a specific process stage, so that the interior wall coating prepared by the preparation method of the skin-touch antiviral interior wall coating has good microcrack self-repair performance under the conditions of room temperature and 75% humidity, and the skin-touch antiviral interior wall coating has good self-repair performance. The anti-virus function of the coating has the damage response characteristic, targeted anti-virus can be achieved for a crack area, the targeting coefficient is high, and the industrial problem that the anti-virus capacity of a damaged part is attenuated is solved; the repaired coating is small in color change and high in texture, gloss and hand feeling retention; the product has stable viscosity and appropriate opening time, is suitable for roller coating, spraying and other processes, and has no gel, no crust and no performance attenuation after being thermally stored at 40 DEG C for 30 days.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of interior wall coatings, in particular to a skin-feeling anti-virus interior wall coating and a preparation method thereof. BACKGROUND

[0002] As an important part of building decoration materials, interior wall coatings not only need to have good decorative effect, but also should meet the growing functional requirements. Skin-feeling interior wall coatings are favored because of their unique effect of delicate and smooth touch, like skin. However, while pursuing the ultimate touch, the mechanical strength and durability of the coating are often sacrificed, and micro-cracks are easily generated due to temperature changes, humidity fluctuations or mechanical stress, affecting the appearance and service life.

[0003] On the other hand, the frequent occurrence of public health incidents has led to a sharp increase in market demand for anti-virus coatings. Most existing anti-virus coatings disperse anti-virus additives (such as ZPD1, whose main active ingredient is zinc pyrithione) in the coating through physical mixing, which can provide basic anti-virus performance, but has obvious defects: first, the distribution of anti-virus components is static and uniform, and when the coating generates micro-cracks due to stress, the newly exposed interior of the coating does not have anti-virus capability, forming a weak link for virus invasion; second, the physically mixed anti-virus additives may affect the continuity and density of the coating film, thereby deteriorating the skin-feeling effect; third, the traditional anti-virus function cannot respond to the damage of the coating and does not have intelligent repair and strengthening capability.

[0004] Currently, self-repairing material technology is mostly applied in polymer elastomers or hydrogels, and rarely applied in complex multi-phase interior wall coating systems. This is mainly due to the challenges of high filler content, complex rheological properties and strict requirements for the final texture of interior wall coatings. There is no literature or patent report on the organic combination and synergistic enhancement of self-repairing mechanism and anti-virus function in interior wall coatings, especially in skin-feeling coatings. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a preparation method of a skin-feeling anti-virus interior wall coating, so that the prepared coating has good micro-crack self-repairing performance under high humidity conditions, and the anti-virus function of the coating layer has damage response characteristics and can target anti-virus for crack areas.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is: A preparation method of a skin-feeling anti-virus interior wall coating, comprising the following steps: S1: preparing an intelligent repair and anti-virus synergistic system SRADS, specifically comprising: S11: preparing a zinc-containing dynamic coordination polymer network Zn-DPN water dispersion; S12: preparing a humidity-stress dual responsive capsule DHRC powder; S13: surface epoxy functionalization modification of the ZPD1 antiviral adjuvant; S14: sequentially mixing and aging the Zn-DPN aqueous dispersion obtained in step S11, the functionalized ZPD1 obtained in step S13, and the DHRC powder obtained in step S12 to obtain the SRADS; S2: adding the SRADS system obtained in S1 to the base coating component after the dispersion step of the coating base filler and before the addition of the emulsion component, and aging after dispersion and viscosity adjustment to obtain the coating.

[0007] Further, in the preparation method of the skin-friendly antiviral interior wall coating described above, the preparation of the Zn-DPN aqueous dispersion in S11 comprises: reacting polyvinyl alcohol PVA with 2,2'-bipyridine-5,5'-dicarboxylic acid BPDA and 2-amino-4,6-dicarboxypyridine ADP in sequence to obtain a double-ligand functionalized PVA-BPDA-ADP ternary polymer; preparing a 4-8wt% aqueous solution of the ternary polymer; under shearing action, programmed dropwise adding an aqueous solution containing bimetallic ions of Eu 3+ and Zn 2+ to the polymer aqueous solution, and aging to obtain the Zn-DPN aqueous dispersion; wherein the molar ratio of Eu 3+ to Zn 2+ is 6:4 to 9:1.

[0008] Further, in the preparation method of the skin-friendly antiviral interior wall coating described above, the preparation of the DHRC powder in S12 comprises: providing amino-functionalized mesoporous silica nanospheres MSN-NH2; immersing the MSN-NH2 in a solution containing polyether-modified siloxane PEMS and sodium pyrithione PT-Na under nitrogen pressure and ultrasonic assistance to obtain co-loaded MSN@PEMS / PT-Na; sequentially constructing a mechanical sensitive layer and a humidity sensitive layer on the MSN@PEMS / PT-Na to obtain the DHRC powder; the mechanical sensitive layer comprises 4-carboxyphenylboric acid CPBA, and the humidity sensitive layer comprises a CPBA-sorbitol complex.

[0009] Further, in the preparation method of the skin-friendly antiviral interior wall coating described above, the surface epoxy functionalization modification of S13 is surface treatment of ZPD1 using silane coupling agent KH-560 at 50-65℃ for 4-8 hours in isopropanol.

[0010] Further, in the preparation method of the skin-friendly antiviral interior wall coating described above, the sequential mixing and aging in S14 comprises: First, dilute the Zn-DPN aqueous dispersion; then pre-wet the functionalized ZPD1 with a small amount of PEMS, and pre-disperse the DHRC powder into a slurry; under low-speed planetary stirring conditions, add the diluted Zn-DPN, pre-wetted functionalized ZPD1, and DHRC slurry in sequence, stirring for 10-20 minutes after each material is added; let the mixture stand at 20-25℃ for 18-36 hours to mature, and then filter.

[0011] Furthermore, in the above-mentioned preparation method of skin-feeling antiviral interior wall coating, the basic filler in S2 includes, by weight: 260 parts deionized water, 3 parts cellulose, 4 parts defoamer, 5 parts dispersant, 2 parts wetting agent, 10 parts ethylene glycol, 10 parts film-forming aid, 1 part attapulgite, 200 parts titanium dioxide, and 80 parts mica powder.

[0012] Furthermore, in the above-mentioned preparation method of the skin-feeling antiviral interior wall coating, the emulsion component in S2 includes, by weight: 350 parts of acrylic emulsion, 3 parts of thickener, and 2 parts of preservative; the total addition amount of the SRADS system is 16.7 parts.

[0013] This invention also protects the skin-feeling antiviral interior wall coating prepared by the above-mentioned method.

[0014] The beneficial effects of this invention are as follows: The core improvement of this invention lies in first preparing an intelligent repair and antiviral synergistic system (SRADS), and then introducing this system into the base coating formulation at a specific process stage. The interior wall coating prepared by the skin-feeling antiviral interior wall coating preparation method has excellent micro-crack self-repair performance under room temperature and 75% humidity conditions. The antiviral function of the coating has damage response characteristics, which can target antiviral activity in cracked areas with a high targeting coefficient, solving the industry problem of attenuation of antiviral ability at damaged areas. The repaired coating has little color change and high retention of texture, gloss and feel. The product has stable viscosity, suitable open time, and is suitable for roller coating, spraying and other processes. After 30 days of heat storage at 40℃, there is no gelation, no skinning and no performance degradation. Detailed Implementation

[0015] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments.

[0016] Example 1 A method for preparing a skin-feeling antiviral interior wall coating includes the following steps: S1: Development of the Smart Repair and Antiviral Synergistic System SRADS, specifically including: S11: Preparation of aqueous dispersions containing zinc-containing dynamic coordination polymer network (Zn-DPN): S111: Under an inert atmosphere and with DIC / DMAP catalysis, the PVA skeleton is sequentially reacted with 2,2'-bipyridine-5,5'-dicarboxylic acid (BPDA, the main ligand) and 2-amino-4,6-dicarboxypyridine (ADP, the auxiliary ligand, specifically used to enhance Zn). 2+ The PVA-BPDA-ADP terpolymer was obtained by esterification reaction (coordination), followed by precipitation, washing, drying and purification. Specific material ratio: Polyvinyl alcohol (PVA): 100 parts by weight (reference material, degree of alcoholysis ≥99%, degree of polymerization 2400±200). 2,2'-Bipyridine-5,5'-dicarboxylic acid (BPDA): 5.5-6.5 parts by weight (corresponding to 5.5%-6.5% of the molar amount of hydroxyl groups in PVA); 2-Amino-4,6-dicarboxypyridine (ADP): 3.5-4.2 parts by weight (corresponding to 3.8%-4.5% of the molar amount of hydroxyl groups in PVA); N,N'-Diisopropylcarbodiimide (DIC): The total amount used is 1.1-1.3 times the sum of the molar amounts of BPDA and ADP; 4-Dimethylaminopyridine (DMAP): 4%-5% of the mass of DIC; Reaction solvent: anhydrous dimethyl sulfoxide (DMSO), used in an amount sufficient to maintain the PVA concentration at 4-5 wt%; Process conditions: BPDA grafting: In an ice-salt bath at -5°C to 0°C, a DMSO solution containing BPDA and DMAP is slowly added dropwise under N2 protection. Then, a DMSO solution containing DIC is slowly added dropwise over 2 hours. After maintaining the reaction at -5°C for 4 hours, the temperature is naturally raised to 25±2°C, and the reaction continues for 36-40 hours. ADP grafting: Maintain 25±2℃, directly add ADP and supplemented DIC and DMAP to the reaction system, and continue the reaction for 22-26 hours; Purification: After concentrating the reaction solution, add it dropwise to an excess (volume ratio 1:3) of icy ethanol / ethyl acetate (1:1, v / v) mixed precipitant. The resulting fibrous precipitate needs to be washed with ethanol and ether alternately at least 4 times. Finally, it is vacuum dried at 40-45℃ for 48-56 hours until constant weight is obtained to obtain the PVA-BPDA-ADP terpolymer. S112: Dissolve the above copolymer in ultrapure water at 65℃ to prepare a 6 wt% solution; under high-speed shear, add a mixed aqueous solution of Eu(NO3)3 and Zn(NO3)2 (Eu:Zn = 8:2, mol / mol) in a two-stage programmed dropwise manner. First, add 50% dropwise at high speed (8000 rpm) and mature for 30 minutes. Then, add the remaining 50% dropwise at medium speed (5000 rpm) and finally mature at low speed (3000 rpm) for 2 hours to obtain a Zn-DPN aqueous dispersion with blue opalescence (solid content ~6%). Specific material proportions: PVA-BPDA-ADP terpolymer: 6 parts by weight; Ultrapure water: 94 parts by weight; Europium nitrate hexahydrate (Eu(NO3)3·6H2O): 0.40 parts by weight; Zinc nitrate hexahydrate (Zn(NO3)2·6H2O): 0.16 parts by weight; Process conditions: Polymer dissolution: Dissolve the terpolymer in ultrapure water at 65±2℃ and 300 rpm for 6-8 hours until completely dissolved and transparent; Programmed addition and ripening: First stage: Under high-speed shearing at 8000±500 rpm, a 50% metal ion mixed solution was added dropwise at a uniform rate over 30 minutes. After the addition was complete, the mixture was further matured at 8000 rpm for 30 minutes.

[0017] Second stage: Reduce the rotation speed to 5000±500 rpm and add the remaining 50% metal ion solution dropwise at a uniform rate over 25 minutes; Final curing: Further reduce the rotation speed to 3000±200 rpm and continue curing for 2.0-2.5 hours; maintain the temperature at 25±3℃ throughout the process; S12: Preparation of Humidity-Stress Dual Response Capsule (DHRC) Powder: S121: Mesoporous silica nanospheres (MSN) were activated in vacuum at 300℃ and then reacted with APTES under reflux in toluene to obtain MSN-NH2; Specific material proportions: Mesoporous silica nanospheres (MSN, particle size 180±20nm): 100 parts by weight; 3-Aminopropyltriethoxysilane (APTES): 20-25 parts by weight; Anhydrous toluene: used as a solvent, in an amount that maintains the MSN concentration at 20-25 mg / mL; Process conditions: MSN activation: Activate at 300±5℃ and vacuum degree <10 Pa for 3-4 hours.

[0018] Reflux reaction: Disperse activated MSN in anhydrous toluene, add APTES, and reflux at 110±2℃ for 22-24 hours.

[0019] Post-processing: After the reaction was completed, the mixture was centrifuged and washed four times each with toluene and ethanol. Finally, it was dried under vacuum at 60°C for 6 hours to obtain MSN-NH2. S122: MSN-NH2 was immersed in an ethanol solution containing PEMS and sodium pyrithione (PT-Na) at 45°C for 36 hours under 5 MPa N2 pressure and ultrasonic assistance. After centrifugation, washing and drying, MSN@PEMS / PT-Na was obtained. Specific material proportions: MSN-NH2: 100 parts by weight; Polyether-modified siloxane (PEMS): 28-32 parts by weight; Sodium pyrithione (PT-Na): 7-9 parts by weight; Anhydrous ethanol: used as a solvent, in an amount that maintains the total solids content at 15-20%; Antioxidant BHT: 0.2-0.3% of PEMS mass; Process conditions: PEMS, PT-Na, and BHT were dissolved together in anhydrous ethanol; MSN-NH2 was dispersed in the above solution and then sonicated at 40 kHz and 300 W for 45 minutes. It was then transferred to a high-pressure reactor and immersed for 36 hours at a pressure of 5±0.2 MPa N2 and a temperature of 45±2℃. Centrifuge to collect, wash three times rapidly with anhydrous ethanol pre-cooled to -20°C, and vacuum dry at 35°C for 12 hours; S123: 4-Carboxyphenylboronic acid (CPBA) was activated by EDC / NHS to react with the amino groups on the surface of MSN@PEMS / PT-Na to obtain an intermediate; the above intermediate was then self-assembled with a sorbitol-CPBA pre-complex in PBS at pH 7.8 using a temperature-programmed cooling method (45℃→25℃); after centrifugation, washing, and freeze-drying, DHRC powder was obtained. Specific material proportions: MSN@PEMS / PT-Na: 100 parts by weight; 4-Carboxyphenylboronic acid (CPBA): 18-22 parts by weight for mechanically sensitive layers, and 12-15 parts by weight for precomplexes; EDC: 1.2 times the total molar amount of CPBA; NHS: 0.5 times the molar amount of EDC; Sorbitol: 20-25 parts by weight; Process conditions: Mechanosensitive layer: MSN@PEMS / PT-Na was dispersed in MES buffer at pH 6.0; CPBA (for the mechanosensitive layer) was added, and after activating EDC / NHS in an ice bath for 15 minutes, it was added to the reaction system. The reaction was carried out at 25°C in the dark for 12 hours; centrifugation and washing were performed. Precomplex preparation: CPBA (used for the precomplex portion) and sorbitol were dissolved in PBS at pH 7.8 and reacted at 45°C for 4 hours to form a precomplex solution; Humidity-sensitive layer: The intermediate modified with the mechanically sensitive layer is dispersed in the above-mentioned pre-composite solution; temperature is programmed to decrease: 45℃ (2h) → 35℃ (2h) → 25℃ (12h); Post-processing: The product was washed three times by centrifugation with PBS at pH 7.8, followed by freeze-drying (pre-frozen at -50°C, dried at -50°C / <10Pa for 48 hours) to obtain DHRC powder. S13: ZPD1 was dispersed in isopropanol and reacted with silane coupling agent KH-560 at 60°C for 6 hours. After centrifugation, washing and drying, surface epoxy functionalized ZPD1 was obtained. Specific material ratio: ZPD1 antiviral adjuvant: 100 parts by weight; Silane coupling agent KH-560: 8-12 parts by weight; Anhydrous isopropanol: used as a solvent, in an amount that maintains the solid content of the system at 15-20%; Process conditions: ZPD1 was uniformly dispersed in anhydrous isopropanol; Add KH-560 and react at 300 rpm for 6 hours under N2 protection at 60±2℃. After the reaction was completed, the mixture was centrifuged and washed three times with anhydrous isopropanol to remove unreacted KH-560. ZPD1 with surface epoxy functionalization was obtained by drying in a vacuum drying oven at 50℃ for 8 hours. S14: Dilute Zn-DPN to 4%, pre-wet functionalized ZPD1 with 0.5% PEMS, and pre-disperse DHRC with 0.1% xanthan gum. In a planetary mixer (30 rpm revolution, 100 rpm rotation), add the diluted Zn-DPN, pre-wetted ZPD1, and DHRC slurry in sequence, stirring for 15, 10, and 20 minutes after each addition, respectively. Cure the mixture at 25°C for 24 hours, and pass it through a 200-mesh sieve to obtain SRADS. The mass ratio of Zn-DPN, DHRC, and functionalized ZPD1 is 1:6:5. Pretreatment process conditions: Zn-DPN dilution: The Zn-DPN aqueous dispersion obtained in S11 was diluted with ultrapure water to a solid content of 4.0 ± 0.2%; Functionalized ZPD1 pre-wetting: Functionalized ZPD1 was spray-wetted with 0.5 wt% PEMS ethanol solution. The amount of PEMS solution was 15-20% of the mass of ZPD1. The solution was left to stand for 30 minutes to allow it to be evenly wetted. DHRC pre-dispersion: DHRC powder was pre-dispersed into a slurry with a solid content of 20-25% using a 0.1 wt% xanthan gum aqueous solution; Hybrid assembly process conditions: In a planetary mixer, operate according to the following sequence and parameters: Add diluted Zn-DPN: run for 5 minutes at an orbital speed of 30±2 rpm and a rotational speed of 100±5 rpm; Add pre-wetted ZPD1: Add slowly and evenly, maintaining the rotation speed, and stir for 10±1 minutes; Add DHRC slurry: Add slowly dropwise while maintaining the rotation speed and stirring for 20±2 minutes; The temperature was maintained at 20-25°C throughout the mixing process; Curing and post-processing conditions: The mixture was left to stand and mature for 24±1 hours in a constant temperature environment of 25±1℃. After maturation, the product is filtered using a 200-mesh (approximately 75μm pore size) nylon screen to remove any trace amounts of large particle aggregates that may form, thus obtaining the final SRADS product. S2: Prepare the following materials according to the weight proportions: Basic packing material: Deionized water: 260 parts; Ethyl cellulose: 3 parts; Defoamer (added in two batches): 2 + 2 parts; Dispersant (sodium polyacrylate): 5 parts; Wetting agent (acetylenic diol): 2; Ethylene glycol: 10 parts; Film-forming aid (alcohol ester dodecyl): 10; Attapulgite: 1 part; 808 titanium dioxide (rutile type): 200 parts; 800 mesh mica powder: 80 parts; Emulsion components: Acrylic emulsion (50% solids): 350 parts; Thickener (polyurethane): 3 parts; Preservative (BIT): 2 parts; SRADS final product: 16.7 units; The specific preparation process is as follows: 1. Disperse water, cellulose, the first defoamer, dispersant, and wetting agent at a low speed of 400 rpm for 10 minutes; 2. Add ethylene glycol, film-forming aid, attapulgite, titanium dioxide, and mica powder in sequence, increase the speed to 1200 rpm, disperse at high speed for 15 minutes, until the fineness is ≤50μm; 3. Reduce the speed to 800 rpm and slowly add the Zn-DPN dispersion to the SRADS system, and disperse for 15 minutes; 4. Reduce speed to 500 rpm, add SRADS, and disperse for 10 minutes; 5. Add acrylic emulsion and preservatives, and adjust the viscosity to 95-105 KU with a thickener; 6. Discharge the material at 25℃ and allow it to mature for 24 hours to obtain the skin-feeling antiviral interior wall coating.

[0020] Comparative Example 1 The preparation method of the skin-feeling antiviral interior wall coating described in Example 1 is different in that the S1 step of preparing SRADS is omitted, and in S2, the added SRADS is replaced by 5 parts of ordinary ZPD1.

[0021] Comparative Example 2 The preparation method of the skin-feeling antiviral interior wall coating described in Example 1 is different in that SRADS does not contain Zn²⁺ (DPN contains only Eu³⁺) and DHRC does not contain PT-Na or ZPD1.

[0022] Comparative Example 3 The preparation method of the skin-feeling antiviral interior wall coating described in Example 1 differs in that it does not contain DHRC and uses ordinary MSN instead; Comparative Example 4 The product uses commercially available brand XX Crystal Antiviral Interior Wall Paint (the specific brand is omitted to avoid suspicion); the product manual states "99% antiviral rate," "mineral feel," and "scrub-resistant"; production batch number: 20230315A; reference technical characteristics (based on product manual and component analysis): Antiviral ingredient: Approximately 2.5% zinc pyrithione (ZPT) added; Film-forming material: silicone-acrylic emulsion system; Filler: Contains quartz sand, mica powder, etc.; Additives: conventional dispersants, wetting agents, and thickeners.

[0023] Experimental Example 1 Self-healing performance test; Experimental method: The coatings prepared in Example 1 and Comparative Examples 1-4 were applied to samples of the same specifications. Standard microcracks were created by artificially simulating damage. The "constant load" mode of the micro-scratch instrument was used, with a scratching speed of 5 mm / min and a scratch length of 10 mm. The width of the scratch observed under the microscope was 10±1 μm and the depth was 50±5 μm. The relationship between load and crack size can be calibrated through pre-experimentation to ensure consistent damage in each experiment. For example, a constant load of 10-20 N typically produces microcracks within this range.

[0024] Create at least three parallel standard microcracks at specific locations on each sample and record their locations; Methods for observing the repair process: Initial state recording (T0): Immediately place the scratched sample under a digital microscope and take a clear photograph of each crack at 200x magnification. Measure and record the initial area (A0) of each crack.

[0025] In the software, crack thresholding is performed, pixel area is directly calculated and converted into actual area (μm). 2 ).

[0026] The sample was placed in a constant temperature and humidity chamber set to 25°C and 75% RH to trigger the self-healing process; after 24 hours, the sample was removed, quickly observed under a microscope and photographed. Image analysis software was used to calculate the remaining area (A) of each crack. x ); Repair rate of a single crack in 24 hours (R) x The calculation formula is: R x (%) = [1 - (A x / A0)]×100% The arithmetic mean and standard deviation of the repair rates of three parallel cracks at the same time point are calculated as the final result for this sample. The experimental results are shown in Table 1: Table 1

[0027] Experimental Example 2 Antiviral performance test; Experimental methods: According to ISO 21702:2019 - Determination of antiviral activity of plastics and other nonporous surfaces.

[0028] Test virus: Human coronavirus HCoV-229E (an enveloped RNA virus commonly used to study the antiviral properties of coronaviruses). Preparation of damaged samples: On standard samples (the coatings prepared in Example 1 and Comparative Examples 1-4 were applied to samples of the same specifications respectively), standardized microcracks with a width of 10±1μm and a depth of 50±5μm were created using a micro-scratcher. At least 3 parallel standard microcracks were created at specific locations on each sample, and their locations were recorded; the specific method is the same as in Experimental Example 1. Inoculate the entire surface area of ​​the sample with the virus and perform the ISO 21702 test as described above; The virus was inoculated into the microcracked surface area of ​​the sample, and the above ISO 21702 test was performed. Calculate the target coefficient: Targeting coefficient = Virus reduction value in cracked area / Virus reduction value in intact area The closer the targeting coefficient is to 1, the higher the consistency of antiviral performance between the damaged area and the intact area, and the better the targeted repair and antiviral enrichment effect. The experimental results are shown in Table 2: Table 2

[0029] Experimental Example 3 The expert panel conducted blind tests on the color, texture, and feel of the samples before and after restoration.

[0030] The experimental results are shown in Table 3: Table 3

[0031] The experimental results above show that Example 1 significantly outperforms all comparative examples in terms of self-repair efficiency, targeted antiviral capability, and preservation of artistic texture. Comparative Example 1 demonstrates the failure of traditional static antiviral agents at the site of damage; Comparative Example 2 demonstrates functional incompleteness due to the lack of antiviral components; and Comparative Example 3 demonstrates that the lack of a smart capsule targeted release system greatly reduces the synergistic effect. This invention, through the ingenious design of the SRADS system, successfully achieves a synergistic improvement in various performance aspects.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A process for the preparation of a skin-feel antiviral interior wall coating, characterized in that, It comprises the following steps: S1: preparing a smart repair and antiviral synergistic system SRADS, specifically comprising: S11: preparing a zinc-containing dynamic coordination polymer network Zn-DPN aqueous dispersion; S12: preparing a humidity-stress dual-responsive capsule DHRC powder; S13: surface epoxy functionalization modification of the ZPD1 antiviral adjuvant; S14: sequentially mixing and aging the Zn-DPN aqueous dispersion obtained in step S11, the functionalized ZPD1 obtained in step S13, and the DHRC powder obtained in step S12 to obtain the SRADS; S2: adding the SRADS system obtained in S1 to the base coating component after the dispersion step of the coating base filler and before the addition of the emulsion component, and aging after dispersion and viscosity adjustment to obtain the coating.

2. The method of preparing a skin-feel antiviral interior wall coating according to claim 1, characterized in that, The preparation of the Zn-DPN aqueous dispersion in S11 comprises: Polyvinyl alcohol PVA is reacted sequentially with 2,2'-bipyridine-5,5'-dicarboxylic acid BPDA and 2-amino-4,6-dicarboxylic pyridine ADP to obtain a double-ligand functionalized PVA-BPDA-ADP ternary polymer; the ternary polymer is formulated into a 4-8 wt% aqueous solution; under shearing action, an aqueous solution containing Eu 3+ and Zn 2+ bimetallic ions is programmed to be added dropwise into the polymer aqueous solution, and after maturation, a Zn-DPN water dispersion is obtained; wherein the molar ratio of Eu 3+ to Zn 2+ is 6:4 to 9:

1.

3. The method of claim 1, wherein, The preparation of the DHRC powder in S12 comprises: Providing amino-functionalized mesoporous silica nanospheres MSN-NH2; Under nitrogen pressure and ultrasonic assistance, immersing MSN-NH2 in a solution containing polyether-modified siloxane PEMS and sodium pyrithione PT-Na to obtain co-loaded MSN@PEMS / PT-Na; Sequentially constructing a mechanical sensitive layer and a humidity sensitive layer on MSN@PEMS / PT-Na to obtain the DHRC powder; the mechanical sensitive layer comprises 4-carboxyphenylboronic acid CPBA, and the humidity sensitive layer comprises a CPBA-sorbitol complex.

4. The method of preparing a skin-feel antiviral interior wall coating according to claim 1, characterized in that, The surface epoxy functionalization modification in S13 is surface treatment of ZPD1 using silane coupling agent KH-560 at 50-65°C for 4-8 hours in isopropyl alcohol.

5. The method of preparing a skin-feel antiviral interior wall coating according to claim 1, wherein The sequential mixing and aging in S14 comprises: First diluting the Zn-DPN aqueous dispersion; then pre-wetting the functionalized ZPD1 with a small amount of PEMS, and pre-dispersing the DHRC powder into a slurry; under low-speed planetary stirring conditions, sequentially adding the diluted Zn-DPN, the pre-wetted functionalized ZPD1, and the DHRC slurry, stirring for 10-20 minutes after each addition; aging the mixture at 20-25°C for 18-36 hours, and filtering.

6. The method of preparing a skin-feel antiviral interior wall coating according to claim 1, wherein The base filler in S2 comprises, by weight: deionized water 260 parts, cellulose 3 parts, defoaming agent 4 parts, dispersant 5 parts, wetting agent 2 parts, ethylene glycol 10 parts, film-forming aid 10 parts, attapulgite 1 part, titanium dioxide 200 parts, and mica powder 80 parts.

7. The method of preparing a skin-feel antiviral interior wall coating according to claim 1, wherein The emulsion component in S2 comprises, by weight: acrylic emulsion 350 parts, thickening agent 3 parts, and preservative 2 parts; the total addition amount of the SRADS system is 16.7 parts.

8. A skin-friendly antiviral interior wall coating prepared by the method of claim 1-7.

Images