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Preparation method of ultrathin modified hydrotalcite and application thereof to rubber gas barrier thin film material

A thin film material and modified water technology, applied in the direction of hydrotalcite, aluminum compound, coating, etc., can solve the problem of weak interaction between hydrophilic clay and non-hydrophilic polymer, gas barrier performance limitation, and material mechanical performance reduction and other issues, to achieve the effect of improving interface compatibility, excellent gas barrier performance, and reducing free volume

Active Publication Date: 2017-05-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to provide a preparation method of ultra-thin modified hydrotalcite and its application in rubber film materials, so as to solve the problem that the excessive addition of clay in traditional clay / rubber composite materials causes the mechanical properties of the material to decrease and is easy to agglomerate. resulting in limited gas barrier properties; and technical problems of weaker interactions between hydrophilic clays and non-hydrophilic polymers

Method used

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  • Preparation method of ultrathin modified hydrotalcite and application thereof to rubber gas barrier thin film material
  • Preparation method of ultrathin modified hydrotalcite and application thereof to rubber gas barrier thin film material
  • Preparation method of ultrathin modified hydrotalcite and application thereof to rubber gas barrier thin film material

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Embodiment 1

[0029] A. Weigh 0.512g Mg(NO 3 ) 2 ·6H 2 O and 0.375g Al(NO 3 ) 3 9H 2 O was dissolved in 100 mL of deionized water to make a mixed salt solution, 1 g of NaOH was weighed and dissolved in 100 mL of deionized water to make a NaOH solution, and NaNO containing 25 vol% formamide was prepared 3 The solution is 100mL, the concentration of sodium nitrate is 0.01mol / L; under the condition of mechanical stirring at 80°C, add the prepared mixed salt solution and NaOH solution dropwise to the prepared formamide NaNO 3 React in the solution, use NaOH solution to control the pH value of the reaction at about 10, complete the dropwise addition within 10 minutes, then centrifuge and wash twice, add water and centrifuge, take the supernatant to obtain an ultra-thin hydrotalcite colloid solution, of which hydrotalcite The content is 0.05wt%. see figure 1 and 2 , show the XRD patterns and TEM patterns of the ultrathin hydrotalcite samples, respectively.

[0030] B. Add polyvinylpyrrol...

Embodiment 2

[0036] A. Weigh 1.024g Mg(NO 3 ) 2 ·6H 2 O and 0.375g Al(NO 3 ) 3 9H 2 O was dissolved in 100 mL of deionized water to make a mixed salt solution, 1 g of NaOH was weighed and dissolved in 100 mL of deionized water to make a NaOH solution, and NaNO containing 35 vol% formamide was prepared 3 Solution 100mL, sodium nitrate concentration 0.02mol / L; under the condition of mechanical stirring at 90°C, add the prepared mixed salt solution and NaOH solution dropwise to the prepared NaNO 3 In the solution, use NaOH solution to control the pH value of the reaction at about 11, and complete the dropwise addition within 20 minutes; then centrifuge and wash 3 times, add water and centrifuge, and take the supernatant to obtain an ultra-thin hydrotalcite colloid solution, wherein the hydrotalcite content is 0.07 wt%.

[0037] B. Sodium dodecylsulfonate (1wt%) was added to the ultrathin hydrotalcite nanosheet solution obtained in step A, and magnetically stirred for 3 hours to obtain a...

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Abstract

The invention discloses a preparation method of ultrathin modified hydrotalcite and an application thereof to a rubber gas barrier thin film material. Firstly, coprecipitation is used for preparing ultrathin hydrotalcite with a high length diameter ratio, surface modification is carried out, spin coating method technology is used, the ultrathin modified hydrotalcite and rubber are compounded in order to form a film, and finally the gas barrier thin film material is prepared by compounding the ultrathin modified hydrotalcite and the rubber. The ultrathin hydrotalcite with a nanometer sheet shaped structure has high length diameter ratio, and can be used as a filler for substantially prolonging diffusion path of oxygen molecules in a thin film material; surface modification of hydrotalcite can improve interfacial compatibility between hydrotalcite and rubber, and reduce free volume, so that the composite thin film materials has excellent gas barrier performance, good heat stability and mechanical performance. The method has wide source, low cost, and simple preparation, and accords with environmental protection requirements; and the method has wide application prospects in the fields of automobile industry, outdoor packaging and aerospace industry.

Description

technical field [0001] The invention belongs to the field of inorganic / organic composite film functional materials, in particular to the preparation of an ultra-thin modified hydrotalcite and its application in rubber gas barrier film materials, and more specifically to the preparation of an ultra-thin modified hydrotalcite The method and the preparation method of the ultrathin modified hydrotalcite and rubber composite gas barrier film material. Background technique [0002] Hydrotalcites (LDHs)-like layered compounds are a class of anionic clays that have developed rapidly in recent years, and are inorganic materials with a wide range of applications. LDHs has a layered structure similar to that of montmorillonite cationic clays, and is a compound formed by the accumulation of interlayer anions and positively charged layers. It has the characteristics of adjustable metal element ratio in the layers and exchangeable anions between layers. In recent years, LDHs colloids wit...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J7/06C09D139/06C09D109/02C09D1/00C09D123/22C01F7/00
CPCC09D109/02C09D123/22C09D139/06C08J7/04C08J7/06C09D1/00C08J2323/22C08J2339/06C08J2309/02C08J2467/02C01F7/785
Inventor 韩景宾王璐美豆义波潘婷卫敏
Owner BEIJING UNIV OF CHEM TECH
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