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Antibacterial casein based nano ZnO composite leather finishing agent and preparation method thereof

A kind of leather finishing agent and nanotechnology, which is applied in the field of antibacterial casein-based nano-ZnO composite leather finishing agent and its preparation, which can solve the problems of unstable chemical properties, limiting the development of casein leather finishing agents, and being susceptible to corrosion by bacteria, etc. problem, to achieve the effect of excellent antibacterial performance

Active Publication Date: 2015-08-12
广州麦吉高分子新材料科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chemical properties of this kind of film-forming materials are unstable, and they are easily corroded by bacteria, etc., which greatly limits the development of casein leather finishing agents.

Method used

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  • Antibacterial casein based nano ZnO composite leather finishing agent and preparation method thereof

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preparation example Construction

[0029] The preparation method of the antibacterial casein-based nano-ZnO composite leather finishing agent of the present invention includes the following steps:

[0030] Step 1: Preparation of casein solution:

[0031] Weigh 1.5~6.1 parts by weight of casein, 0.5~2.0 parts by weight of lye and 25.0~40.0 parts by weight of deionized water into a three-necked flask, the temperature of the water bath is 50~70℃, the stirring speed is 100~400r / min, heating 0.5~2.5h to obtain casein solution;

[0032] Step 2: Preparation of nano-ZnO dispersion:

[0033] Weigh 5.0~25.0 parts by weight of deionized water and 1.5~4.0 parts by weight of nano-ZnO in a beaker, and disperse the nano-ZnO in water to obtain a nano-ZnO dispersion;

[0034] Step 3: Preparation of casein-based nano-ZnO composite emulsion:

[0035] The nano-ZnO dispersion obtained in step two and the casein solution obtained in step one are compounded in a mass ratio of (1.68~1.90):1, and the compounding time is 0.5~3h.

[0036] In step 1...

Embodiment 1

[0045] Step 1: Preparation of casein solution:

[0046] Weigh 1.5 parts by weight of casein, 2.0 parts by weight of lye and 25.0 parts by weight of deionized water into the three-necked flask, the temperature of the water bath is 70°C, the stirring speed is 100r / min, and the casein solution is obtained by heating for 2.5 hours;

[0047] Step 2: Preparation of nano-ZnO dispersion:

[0048] Weigh 5.0 parts by weight of deionized water and 4.0 parts by weight of nano-ZnO in a beaker, and disperse the nano-ZnO in water to obtain a nano-ZnO dispersion;

[0049] Step 3: Preparation of casein-based nano-ZnO composite emulsion:

[0050] The nano-ZnO dispersion obtained in step two and the casein solution obtained in step one are compounded at a mass ratio of 1.68:1, and the compounding time is 3h.

[0051] In the first step, the lye is selected from the triethanolamine aqueous solution with a mass fraction of 30%.

[0052] Step two:

[0053] The dispersion adopts magnetic stirring, the speed is 30...

Embodiment 2

[0060] Step 1: Preparation of casein solution:

[0061] Weigh 3.8 parts by weight of casein, 1.2 parts by weight of lye and 22.5 parts by weight of deionized water into a three-necked flask, the temperature of the water bath is 60°C, the stirring speed is 250r / min, and the casein solution is obtained by heating for 1.5h;

[0062] Step 2: Preparation of nano-ZnO dispersion:

[0063] Weigh 15.0 parts by weight of deionized water and 2.7 parts by weight of nano-ZnO in a beaker, and disperse the nano-ZnO in water to obtain a nano-ZnO dispersion;

[0064] Step 3: Preparation of casein-based nano-ZnO composite emulsion:

[0065] The nano-ZnO dispersion obtained in step two and the casein solution obtained in step one were compounded at a mass ratio of 1.79:1, and the compounding time was 1.7h.

[0066] In step 1, the lye is selected as a 30% hydroxyethylethylenediamine aqueous solution.

[0067] Step two:

[0068] The dispersion adopts magnetic stirring, the speed is 350r / min, and the stirring t...

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Abstract

The present invention relates to an antibacterial casein based nano ZnO composite leather finishing agent and a preparation method thereof. The study of introduction of nano-ZnO into a casein system for preparing leather finishing agent is rarely reported. The preparation method is as below: adding casein, lye and deionized water to a three-necked flask, and heating in a water bath to obtain a casein dissolved solution; dispersing the nano-ZnO in water to obtain a nano-ZnO dispersion liquid; compounding the nano-ZnO dispersion liquid and casein dissolved solution to obtain the antibacterial nano ZnO composite leather finishing agent. According to the invention, first casein is dissolved by lye in a suitable temperature environment to obtain a casein dissolved solution; and then the nano-ZnO dispersion liquid and casein dissolved solution are compounded through a certain method to introduce ZnO nanoparticles into the casein system, so as to obtain the inorganic / casein leather finishing agent with excellent performance and excellent antibacterial properties.

Description

technical field [0001] The invention relates to a leather finishing agent and a preparation method thereof, in particular to an antibacterial casein-based nano ZnO composite leather finishing agent and a preparation method thereof. Background technique [0002] With the rapid development of the economy, the problem of environmental pollution is becoming more and more serious, and the development of renewable resources and the research and development of environmentally friendly materials have attracted much attention. As a natural protein, casein is a completely biodegradable renewable resource. Due to its unique film-forming properties, and the structure contains a variety of active groups, which are easy to be modified, casein film-forming substances have been widely used in leather finishing agents. However, the chemical properties of this kind of film-forming materials are unstable, and they are easily corroded by bacteria, etc., which greatly limits the development of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D189/00C09D7/12C14C11/00
CPCC08K3/22C08K2003/2296C09D7/40C09D189/005C14C11/003
Inventor 马建中王雅楠徐群娜
Owner 广州麦吉高分子新材料科技有限公司
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