Acrylic acid grafted polyvinyl alcohol enhancer, and preparation method and application thereof

Abstract

The invention discloses an acrylic acid grafted polyvinyl alcohol enhancer, and a preparation method and application thereof. The preparation method comprises the following steps: adding 0.1-1 part of polyvinyl alcohol into 4-10 parts of water, and heating at 60-90 DEG C for 1-5 hours to gelatinize the polyvinyl alcohol; and adding 1-5 parts of acrylic acid, adding alkali to regulate the pH value to 7-8, adding 0.01-0.1 part of initiator, and reacting at 60-90 DEG C for 2-6 hours to obtain the acrylic acid grafted polyvinyl alcohol enhancer. The polyvinyl alcohol chain used as the framework is grafted with the polyacrylic acid branched chain with certain flexibility to form the block macromolecular structure with branched chain, so that the prepared enhancer has better enhancement effect; and the nano glaze slip with the enhancer can not easily crack after being applied to the ceramic billet surface. The enhancer has small influence on the viscosity and flowability of the glaze slip, so the glaze thickness on the billet surface can not be influenced when the traditional glazing method is adopted.

Description

technical field

[0001] The invention belongs to the technical field of preparation of ceramic reinforcing agents, and in particular relates to an acrylic acid grafted polyvinyl alcohol reinforcing agent and its preparation method and application. Background technique

[0002] As a representative of emerging technologies in the 21st century, nanotechnology is widely used in chemistry, materials, biology, medicine, computers, printing and other fields. Among them, the ceramic glaze is improved in formula, added with grinding aid, and then ground for a certain period of time by a nano-grinder to obtain the particle size (d 90 ) less than 1000nm quasi-nanometer glaze, commonly known as nano-glaze in ceramic production.

[0003] According to the traditional glazing process (glaze dipping, glaze spraying, glaze spraying, etc.), the nano-glaze slurry is applied to the surface of the ceramic body (including green body, low-temperature green body, high-temperature green body, etc.),...

Examples

Embodiment 1

[0030] A preparation method of acrylic acid grafted polyvinyl alcohol reinforcing agent, comprises the steps:

[0031] (1) Pretreatment of polyvinyl alcohol: weigh 10g of polyvinyl alcohol, add 100g of water, heat at 60°C for 5h, and make the polyvinyl alcohol gelatinize completely;

[0032] (2) Graft polymerization reaction: Add 50g of acrylic acid to the gelatinized polyvinyl alcohol in step (1), then add NaOH to adjust the pH value to 7, then add 1g of initiator ammonium persulfate, and react at 60°C for 6h After stopping, the acrylic acid grafted polyvinyl alcohol reinforcing agent is obtained.

[0033] The test of the acrylic acid grafted polyvinyl alcohol reinforcing agent that the present embodiment makes: the ceramic nano-glaze material that the acrylic acid grafted polyvinyl alcohol reinforcing agent dosage is 0.5wt% is placed under the high-speed mixer and stirred for 5 minutes, then sprayed The ceramic nano-glaze was evenly sprayed on the green body, and after dryi...

Embodiment 2

[0035] A preparation method of acrylic acid grafted polyvinyl alcohol reinforcing agent, comprises the steps:

[0036] (1) Pretreatment of polyvinyl alcohol: Weigh 1 g of polyvinyl alcohol, add 10 g of water, and heat at 90° C. for 1 hour to completely gelatinize the polyvinyl alcohol;

[0037] (2) Graft polymerization reaction: Add 10g of acrylic acid to the gelatinized polyvinyl alcohol in step (1), then add KOH to adjust the pH value to 7, then add 0.1g of initiator ammonium persulfate, and react at 90°C Stop after 2h, and obtain the acrylic acid grafted polyvinyl alcohol reinforcing agent.

[0038] The test of the acrylic acid grafted polyvinyl alcohol reinforcing agent prepared in this example: the ceramic traditional glaze and nano glaze composite glaze material with acrylic acid grafted polyvinyl alcohol reinforcing agent dosage of 0.5wt% were placed under a high-speed mixer and stirred After 5 minutes, the ceramic nano-glaze was evenly sprayed on the green body through ...

Embodiment 3

[0040] A preparation method of acrylic acid grafted polyvinyl alcohol reinforcing agent, comprises the steps:

[0041] (1) Pretreatment of polyvinyl alcohol: weigh 10 g of polyvinyl alcohol, add 100 g of water, and heat at 80° C. for 4 hours to completely gelatinize the polyvinyl alcohol;

[0042] (2) Graft polymerization reaction: Add 30g of acrylic acid to the gelatinized polyvinyl alcohol in step (1), then add NaOH to adjust the pH value to 7, then add 0.4g of initiator ammonium persulfate, and react at 80°C Stop after 3h, and obtain the acrylic acid grafted polyvinyl alcohol reinforcing agent.

[0043] The test of the acrylic acid grafted polyvinyl alcohol reinforcing agent that the present embodiment makes: the ceramic nano-glaze material that the acrylic acid grafted polyvinyl alcohol reinforcing agent dosage is 0.6wt% is placed under the high-speed stirrer and stirred for 5 minutes, then by spray gun The ceramic nano-glaze was evenly sprayed on the green body, and afte...

technical field

[0001] The invention belongs to the technical field of preparation of ceramic reinforcing agents, and in particular relates to an acrylic acid grafted polyvinyl alcohol reinforcing agent and its preparation method and application. Background technique

[0002] As a representative of emerging technologies in the 21st century, nanotechnology is widely used in chemistry, materials, biology, medicine, computers, printing and other fields. Among them, the ceramic glaze is improved in formula, added with grinding aid, and then ground for a certain period of time by a nano-grinder to obtain the particle size (d 90 ) less than 1000nm quasi-nanometer glaze, commonly known as nano-glaze in ceramic production.

[0003] According to the traditional glazing process (glaze dipping, glaze spraying, glaze spraying, etc.), the nano-glaze slurry is applied to the surface of the ceramic body (including green body, low-temperature green body, high-temperature green body, etc.),...

Examples

Embodiment 1

[0030] A preparation method of acrylic acid grafted polyvinyl alcohol reinforcing agent, comprises the steps:

[0031] (1) Pretreatment of polyvinyl alcohol: weigh 10g of polyvinyl alcohol, add 100g of water, heat at 60°C for 5h, and make the polyvinyl alcohol gelatinize completely;

[0032] (2) Graft polymerization reaction: Add 50g of acrylic acid to the gelatinized polyvinyl alcohol in step (1), then add NaOH to adjust the pH value to 7, then add 1g of initiator ammonium persulfate, and react at 60°C for 6h After stopping, the acrylic acid grafted polyvinyl alcohol reinforcing agent is obtained.

[0033] The test of the acrylic acid grafted polyvinyl alcohol reinforcing agent that the present embodiment makes: the ceramic nano-glaze material that the acrylic acid grafted polyvinyl alcohol reinforcing agent dosage is 0.5wt% is placed under the high-speed mixer and stirred for 5 minutes, then sprayed The ceramic nano-glaze was evenly sprayed on the green body, and after dryi...

Embodiment 2

[0035] A preparation method of acrylic acid grafted polyvinyl alcohol reinforcing agent, comprises the steps:

[0036] (1) Pretreatment of polyvinyl alcohol: Weigh 1 g of polyvinyl alcohol, add 10 g of water, and heat at 90° C. for 1 hour to completely gelatinize the polyvinyl alcohol;

[0037] (2) Graft polymerization reaction: Add 10g of acrylic acid to the gelatinized polyvinyl alcohol in step (1), then add KOH to adjust the pH value to 7, then add 0.1g of initiator ammonium persulfate, and react at 90°C Stop after 2h, and obtain the acrylic acid grafted polyvinyl alcohol reinforcing agent.

[0038] The test of the acrylic acid grafted polyvinyl alcohol reinforcing agent prepared in this example: the ceramic traditional glaze and nano glaze composite glaze material with acrylic acid grafted polyvinyl alcohol reinforcing agent dosage of 0.5wt% were placed under a high-speed mixer and stirred After 5 minutes, the ceramic nano-glaze was evenly sprayed on the green body through ...

Embodiment 3

[0040] A preparation method of acrylic acid grafted polyvinyl alcohol reinforcing agent, comprises the steps:

[0041] (1) Pretreatment of polyvinyl alcohol: weigh 10 g of polyvinyl alcohol, add 100 g of water, and heat at 80° C. for 4 hours to completely gelatinize the polyvinyl alcohol;

[0042] (2) Graft polymerization reaction: Add 30g of acrylic acid to the gelatinized polyvinyl alcohol in step (1), then add NaOH to adjust the pH value to 7, then add 0.4g of initiator ammonium persulfate, and react at 80°C Stop after 3h, and obtain the acrylic acid grafted polyvinyl alcohol reinforcing agent.

[0043] The test of the acrylic acid grafted polyvinyl alcohol reinforcing agent that the present embodiment makes: the ceramic nano-glaze material that the acrylic acid grafted polyvinyl alcohol reinforcing agent dosage is 0.6wt% is placed under the high-speed stirrer and stirred for 5 minutes, then by spray gun The ceramic nano-glaze was evenly sprayed on the green body, and afte...