INORGANIC NANOMATERIAL FOR CONTINUOUS FORMALDEHYDE REMOVAL AND PREPARATION METHOD THEREOF

Abstract

An inorganic nanomaterial for continuous formaldehyde removal includes the following components in part by mass: 20-30 parts of water, 0.1-0.3 parts of cellulose, 0.1-0.2 parts of a defoamer, 0.3-0.6 parts of a dispersant, 0.3-0.6 parts of a wetting agent, 20-25 parts of titanium dioxide, 5-10 parts of kaolin, 10-15 parts of heavy calcium, 30-40 parts of modified inorganic hybrid resin, 0.1-1 part of a film-forming additive, and 0.1-1 part of propylene glycol. After inorganic hybrid modification, an ammonia group is introduced, which can continuously and effectively decompose formaldehyde in the environment. A coating film not only has good anti-mildew, anti-algae, fire prevention, and heat insulation functions, but also has a continuous formaldehyde removal function. The formaldehyde removal efficiency is greater than 95%. The durability of formaldehyde purification effect is 90%.

Claims

1. An inorganic nanomaterial for continuous formaldehyde removal, comprising the following components in part by mass: 20-30 parts of water, 0.1-0.3 parts of cellulose, 0.1-0.2 parts of a defoamer, 0.3-0.6 parts of a dispersant, 0.3-0.6 parts of a wetting agent, 20-25 parts of titanium dioxide, 5-10 parts of kaolin, 10-15 parts of heavy calcium, 30-40 parts of modified inorganic hybrid resin, 0.1-1 part of a film-forming additive, and 0.1-1 part of propylene glycol.

2. The inorganic nanomaterial according to claim 1, wherein organic amine and organic silicone resin are added with an initiator at 120-180° C. to obtain amino organic silicone resin, and then the amino organic silicone resin and inorganic resin are added with an emulsifier at 80-120° C. to obtain the modified inorganic hybrid resin.

3. The inorganic nanomaterial according to claim 1, wherein the cellulose is hydroxyethyl cellulose; the defoamer is an organic silicone defoamer; the dispersant is an ammonium salt dispersant; and the wetting agent is a non-ionic surfactant.

4. The inorganic nanomaterial according to claim 1, wherein the titanium dioxide is rutile titanium dioxide; the kaolin is calcined kaolin; and the heavy calcium is heavy calcium carbonate.

5. The inorganic nanomaterial according to claim 1, wherein the film-forming additive is 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate.

6. A preparation method of an inorganic nanomaterial for continuous formaldehyde removal, comprising the following steps: 1) installing a dispersing stirring paddle in a reactor, and adding water, a defoamer, a dispersant, a wetting agent, and cellulose to the reactor for dispersion at a medium speed for 15-25 min to obtain a pulp; 2) increasing a rotational speed of the dispersing stirring paddle to a high speed, and slowly adding titanium dioxide, kaolin, and heavy calcium for dispersion for 20-30 min to prepare a slurry; and 3) reducing the rotational speed of the dispersing stirring paddle to a low speed, and slowly adding modified inorganic hybrid resin, a film-forming additive, and propylene glycol for uniform dispersion to prepare a finished inorganic coating for formaldehyde removal.

7. The preparation method according to claim 6, wherein the high speed indicates the rotational speed of the dispersing stirring paddle is greater than 8,000 r/min.

8. The preparation method according to claim 6, wherein the medium speed indicates the rotational speed of the dispersing stirring paddle is 4,000-5,000 r/min.

9. The preparation method according to claim 6, wherein the low speed indicates the rotational speed of the dispersing stirring paddle is not greater than 500 r/min.

10. The preparation method according to claim 6, wherein the titanium dioxide, the kaolin, and heavy calcium powder are added at a rate less than 25 kg/min, and the modified inorganic hybrid resin, the film-forming additive, and the propylene glycol are added at a rate less than 500 ml/min.

Description

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to enable those skilled in the art to better understand the solutions of the present disclosure, the technical solutions in the examples of the present disclosure will be clearly and completely described below. It is obvious that the described examples are only a part of, not all of, the examples, and based on the examples of the present disclosure, all other examples obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

[0025] The following describes the present disclosure in detail with reference to specific implementations and examples.

[0026] The present disclosure uses modified inorganic hybrid resin as a film-forming substance, and uses rutile titanium dioxide, kaolin, and heavy calcium as pigments and fillers to prepare an inorganic interior decorative material for formaldehyde removal with good color durability, strong adhesion, good water and alkali resistance, pollution resistance, good air permeability, and a grade A fire rating, which just meet the needs of the market.

EXAMPLE 1

[0027] An inorganic nanomaterial for continuous formaldehyde removal included the following components in part by mass: 22.5 parts of water, 0.2 parts of cellulose, 0.2 parts of a defoamer, 0.5 parts of a dispersant, 0.6 parts of a wetting agent, 25 parts of titanium dioxide, 10 parts of kaolin, 10 parts of heavy calcium, 30 parts of modified inorganic hybrid resin, 0.6 parts of a film-forming additive, and 0.4 parts of propylene glycol.

[0028] A preparation method of the above inorganic nanomaterial for continuous formaldehyde removal included the following steps. [0029] 1) A dispersing stirring paddle was installed in a reactor, and water, the defoamer, the dispersant, the wetting agent, and the cellulose were added to the reactor for dispersion at a medium speed for 20 min to obtain a pulp, wherein a rotational speed of the dispersing stirring paddle in the reactor is greater than 4,000-5,000 r/min. [0030] 2) The rotational speed of the dispersing stirring paddle was increased, and the titanium dioxide, the kaolin, and the heavy calcium were slowly added for dispersion at a high speed for 30 min to prepare a slurry, wherein the rotational speed of the dispersing stirring paddle in the reactor is greater than 8,000 r/min. [0031] 3) The rotational speed of the dispersing stirring paddle was reduced to a low speed, and the modified inorganic hybrid resin, the film-forming additive, and the propylene glycol were slowly added for dispersion at the low speed to prepare a finished inorganic coating for formaldehyde removal, wherein the rotational speed of the dispersing stirring paddle in the reactor is not greater than 500 r/min.

EXAMPLE 2

[0032] An inorganic nanomaterial for continuous formaldehyde removal included the following components in part by mass: 25 parts of water, 0.2 parts of cellulose, 0.2 parts of a defoamer, 0.5 parts of a dispersant, 0.6 parts of a wetting agent, 20 parts of titanium dioxide, 7.5 parts of kaolin, 10 parts of heavy calcium, 35 parts of modified inorganic hybrid resin, 0.6 parts of a film-forming additive, and 0.4 parts of propylene glycol.

[0033] A preparation method of the above inorganic nanomaterial for continuous formaldehyde removal included the following steps. [0034] 1) A dispersing stirring paddle was installed in a reactor, and water, the defoamer, the dispersant, the wetting agent, and the cellulose were added to the reactor for dispersion at a medium speed for 20 min to obtain a pulp, wherein a rotational speed of the dispersing stirring paddle in the reactor is greater than 4,000-5,000 r/min. [0035] 2) The rotational speed of the dispersing stirring paddle was increased, and the titanium dioxide, the kaolin, and the heavy calcium were slowly added for dispersion at a high speed for 30 min to prepare a slurry, wherein the rotational speed of the dispersing stirring paddle in the reactor is greater than 8,000 r/min. [0036] 3) The rotational speed of the dispersing stirring paddle was reduced to a low speed, and the modified inorganic hybrid resin, the film-forming additive, and the propylene glycol were slowly added for dispersion at the low speed to prepare a finished inorganic coating for formaldehyde removal, wherein the rotational speed of the dispersing stirring paddle in the reactor is not greater than 500 r/min.

EXAMPLE 3

[0037] An inorganic nanomaterial for continuous formaldehyde removal included the following components in part by mass: 30 parts of water, 0.2 parts of cellulose, 0.2 parts of a defoamer, 0.5 parts of a dispersant, 0.6 parts of a wetting agent, 22 parts of titanium dioxide, 5 parts of kaolin, 15 parts of heavy calcium, 40 parts of modified inorganic hybrid resin, 0.6 parts of a film-forming additive, and 0.4 parts of propylene glycol.

[0038] A preparation method of the above inorganic nanomaterial for continuous formaldehyde removal included the following steps. [0039] 4) A dispersing stirring paddle was installed in a reactor, and water, the defoamer, the dispersant, the wetting agent, and the cellulose were added to the reactor for dispersion at a medium speed for 20 min to obtain a pulp, wherein a rotational speed of the dispersing stirring paddle in the reactor is greater than 4,000-5,000 r/min. [0040] 5) The rotational speed of the dispersing stirring paddle was increased, and the titanium dioxide, the kaolin, and the heavy calcium were slowly added for dispersion at a high speed for 30 min to prepare a slurry, wherein the rotational speed of the dispersing stirring paddle in the reactor is greater than 8,000 r/min. [0041] 6) The rotational speed of the dispersing stirring paddle was reduced to a low speed, and the modified inorganic hybrid resin, the film-forming additive, and the propylene glycol were slowly added for dispersion at the low speed to prepare a finished inorganic coating for formaldehyde removal, wherein the rotational speed of the dispersing stirring paddle in the reactor is not greater than 500 r/min.

[0042] Experimental data of the inorganic nanomaterial for continuous formaldehyde removal prepared by the present disclosure far exceeds the standard of superior products and interior wall finishing paint of GB/T9756-2018 “Synthetic resin emulsion coatings for interior wall” and the standard requirements of interior wall coating gloss (60°≤10° finishing paint) of HJ2537-2014 “Technical requirement for environmental labeling products-Water based Coatings”.

TABLE-US-00001 Serial Technical Test results No. Test item requirements Example 1 Example 2 Example 3 Conclusion 1 State in a No clumps, and No clumps, and No clumps, and No clumps, and Meet container a uniform state a uniform state a uniform state a uniform state requirements after stirring after stirring after stirring after stirring 2 Application Without Without Without Without Meet property obstacle in the obstacle in the obstacle in the obstacle in the requirements second pass of second pass of second pass of second pass of brush coating brush coating brush coating brush coating 3 Low- Not Not Not Not Meet temperature deteriorated deteriorated deteriorated deteriorated requirements stability (3 cycles) 4 Alkali No No No No Meet resistance abnormality abnormality abnormality abnormality requirements (96 h) 5 Scrubbing ≥6,000 30,000 times, 30,000 times, 30,000 times, Meet resistance/ a paint a paint a paint requirements times film is film is film is damaged damaged damaged 6 Mildew Grade 0 Grade 0 Grade 0 Grade 0 Meet resistance (no obvious (no obvious (no obvious (no obvious requirements of paint film mildew at mildew at mildew at mildew at (28 days) 50 times 50 times 50 times 50 times magnification) magnification) magnification) magnification) 7 Combustion Grade A A (A2) A (A2) A (A2) Meet performance requirements grade 8 VOC ≤80 5 8 4 Meet content, g/L requirements 9 Total ≤100 Not Not Not Meet content of detected Detected Detected requirements benzene series/(mg/Kg) 10 Content of ≤50 Not Not Not Meet formaldehyde/ Detected Detected Detected requirements (mg/Kg) 11 Formaldehyde ≥75 95% 96% 96% Meet purification requirements efficiency, % 12 Durability of ≥60 90% 91% 90% Meet formaldehyde requirements purification effect, %

[0043] The inorganic nanomaterial for continuous formaldehyde removal of examples of the present disclosure has a resistance to scrubbing up to 30,000 times, no mildew in 28 days, a grade A fire rating, extremely low VOC content, and little benzene series and formaldehyde. Furthermore, an ammonia group is introduced to the modified inorganic hybrid resin, which can continuously and effectively decompose the formaldehyde in the environment. The formaldehyde purification efficiency is greater than 95%. The durability of formaldehyde purification effect is 90%. The nanomaterial is a healthy and environment-friendly decorative material for interior decoration with very wide application prospects.

[0044] Although the examples of the present disclosure have been illustrated, it should be understood that those of ordinary skill in the art may still make various changes, modifications, replacements and variations to the above examples without departing from the principle and spirit of the present disclosure, and the scope of the present disclosure is limited by the claims and equivalents thereof.