Preparation method of polyacrylic ester emulsion modified by hollow zinc oxide microspheres with shell layers adopting sheet structures

A technology of polyacrylate emulsion and sheet-like structure, applied in the direction of coating, can solve the problems of poor water resistance, poor friction and mechanical properties, etc., and achieve the effects of improved water resistance, low cost and uniform appearance

Active Publication Date: 2014-11-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second is to use the protein film-forming material with good hygienic performance to modify polyacrylate, thereby improving the water vapor permeability of polyacrylate coating, (Gan Changfeng, Xu Qunna, Zhou Jianhua, etc. ternary amphiphilic copolymer as emulsifier Preparation of core-shell modified casein leather finishing agent [J]. China Leather, 2013, 42(5): 37-41.) However, protein film-forming materials have poor water resistance, friction resistance and poor mechanical properties

Method used

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  • Preparation method of polyacrylic ester emulsion modified by hollow zinc oxide microspheres with shell layers adopting sheet structures
  • Preparation method of polyacrylic ester emulsion modified by hollow zinc oxide microspheres with shell layers adopting sheet structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Add 2 / 3 of the amount of Zn(NO 3 ) 2 ·6H 2 O and hexamethylenetetramine were miscible in deionized water, and reacted at 81°C for 5 minutes, then added 2 / 3 of the amount of sodium citrate, kept the reaction for 1.1 h, and added the remaining 1 / 3 of the amount of Zn(NO 3 ) 2 ·6H 2 O and hexamethylenetetramine, and react at 86°C for 5 minutes, add the remaining 1 / 3 of the amount of sodium citrate, and react at 86°C for 10 minutes, use ammonia water to adjust the pH value to 9.4, and then at 86°C Under heat preservation for 3 hours, then washed with water and dried at 60°C for 12 hours to obtain hollow zinc oxide microspheres with a sheet-like structure in the shell; wherein, Zn(NO 3 ) 2 ·6H 2 The mass ratio of the total amount of O, hexamethylenetetramine, and sodium citrate is 0.891:0.42:0.111; Zn(NO 3 ) 2 ·6H 2 The mass ratio of the total mass of O to deionized water is 0.891:70.

[0023] 2) After ultrasonically dispersing the hollow zinc oxide microspheres...

Embodiment 2

[0025] 1) Add 2 / 3 of the amount of Zn(NO 3 ) 2 ·6H 2 O and hexamethylenetetramine were miscible in deionized water, and reacted at 82°C for 5 minutes, then added 2 / 3 of the amount of sodium citrate, kept the reaction for 1.2 hours, and added the remaining 1 / 3 of the amount of Zn(NO 3 ) 2 ·6H 2 O and hexamethylenetetramine, and react at 87°C for 5 minutes, add the remaining 1 / 3 of the amount of sodium citrate, and react at 87°C for 10 minutes, use ammonia water to adjust the pH value to 10, and then at 87°C Under heat preservation reaction for 3.5h, then washed with water and dried at 80°C for 8h to obtain hollow zinc oxide microspheres with a sheet-like structure in the shell; wherein, Zn(NO 3 ) 2 ·6H 2 The mass ratio of the total amount of O, hexamethylenetetramine, and sodium citrate is 0.7425:0.3495:0.093; Zn(NO 3 ) 2 ·6H 2 The mass ratio of the total mass of O to deionized water is 0.7425:70.

[0026] 2) After ultrasonically dispersing the hollow zinc oxide micro...

Embodiment 3

[0028] 1) Add 2 / 3 of the amount of Zn(NO 3 ) 2 ·6H 2 O and hexamethylenetetramine were miscible in deionized water, and reacted at 81°C for 5 minutes, then added 2 / 3 of the amount of sodium citrate, kept the reaction for 1.5 hours, and added the remaining 1 / 3 of the amount of Zn(NO 3 ) 2 ·6H 2O and hexamethylenetetramine, and react at 86°C for 5 minutes, add the remaining 1 / 3 of the amount of sodium citrate, and react at 86°C for 10 minutes, use ammonia water to adjust the pH value to 9.8, and then at 86°C Under heat preservation reaction for 4h, then washed with water and dried at 70°C for 10h to obtain hollow zinc oxide microspheres with a sheet-like structure in the shell; wherein, Zn(NO 3 ) 2 ·6H 2 The mass ratio of the total amount of O, hexamethylenetetramine, and sodium citrate is 1.2075: 0.5685: 0.2985; Zn(NO 3 ) 2 ·6H 2 The mass ratio of the total mass of O to deionized water is 1.2075:70.

[0029] 2) After ultrasonically dispersing the hollow zinc oxide mic...

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Abstract

The invention relates to a preparation method of a polyacrylic ester emulsion modified by hollow zinc oxide microspheres with shell layers adopting sheet structures. The preparation method comprises the following steps: firstly, preparing the hollow zinc oxide microspheres with the shell layers adopting the sheet structures according to the alkaline etching mechanism and the Ostwald ripening mechanism; secondly, modifying a polyacrylic ester emulsion with the hollow zinc oxide microspheres by a physical blending method. The hollow zinc oxide microspheres with the shell layers adopting the sheet structures are formed through the prior etching of ammonia water or sodium hydroxide to the zinc hydroxide in zinc hydroxide/zinc oxide composite microspheres and the self-assembly process of oriented adsorption growth of zinc oxide nano particles, the preparation technology is simple, the reaction condition is moderate, and the operability and productivity are high, the prepared hollow zinc oxide microspheres with the shell layers adopting the sheet structures have uniform appearances. Compared with a pure polyacrylic ester coating, a polyacrylic ester emulsion coating modified by the method provided by the invention has the advantages that the moisture permeability is increased by 51%, the water tolerance is increased by 11.61%, and the tensile strength is increased by 60.26%.

Description

Technical field: [0001] The invention relates to a preparation method of a modified polyacrylate emulsion, in particular to a preparation method of a hollow zinc oxide microsphere modified polyacrylate emulsion with a sheet structure. technical background: [0002] Hollow structure material is a new type of particulate material developed in the 1950s and 1960s. It is widely used in drug control release, light absorption, microencapsulation, water treatment, catalysis, biochemistry and other fields. Due to its diverse morphology, controllable structure, and many special physical and chemical properties, zinc oxide has attracted much attention in the field of hollow structural materials. At present, the methods for preparing hollow zinc oxide mainly include template method, Ostwald ripening method and chemical etching method. Compared with the template method, the preparation of hollow ZnO microspheres by the Ostwald ripening method and chemical etching method has the followi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/02C08L33/04C08K7/24C08K3/22C09D133/04C09D7/12
Inventor 鲍艳王程马建中
Owner SHAANXI UNIV OF SCI & TECH
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