Preparation method of montmorillonite film capable of stably existing in solution

A technology of montmorillonite and film, which is applied in the field of preparation of montmorillonite film, can solve the problems of poor high temperature resistance of organic matter, complex reassembly process, poor stability of montmorillonite film material, etc., and achieve dispersibility and hydration expansion The effect of reduced resistance, improved stability, and simple and efficient operation process

Active Publication Date: 2020-12-11
WUHAN UNIV OF TECH
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the natural hydration expansion characteristics of clay minerals, the montmorillonite film material prepared by direct suction filtration has extremely poor stability in water and cannot maintain the film shape. Therefore, it is usually necessary to modify the surface of the clay during the reassembly process, as shown in related research Thin films prepared by reassembly of montmorillonite nanosheets after CTAB modification reported in (J.Mater.Chem.A, 2019, 7, 14089)
The introduction of this organic modifier not only complicates the reassembly process, but also affects the nanofluidic channel structure in the two-dimensional direction, and the poor high temperature resistance of organic matter limits the application of clay mineral thin film materials. scope

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of montmorillonite film capable of stably existing in solution
  • Preparation method of montmorillonite film capable of stably existing in solution
  • Preparation method of montmorillonite film capable of stably existing in solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of the montmorillonite thin film that can exist stably in solution, concrete steps are as follows:

[0022] 1) Disperse 1.5g lithium-based montmorillonite sample in pure water to prepare 30mL of 5wt% lithium-based montmorillonite slurry, prepare montmorillonite film A1 by vacuum filtration, and separate montmorillonite film A1 from the filter membrane ;

[0023] 2) Montmorillonite film A1 was dried at 60°C for 15 hours, then annealed at 100°C for 6 hours, and then annealed at 250°C for 24 hours to obtain montmorillonite film sample A2, which is stable in water There are more than 28d.

Embodiment 2

[0025] A kind of preparation method of the montmorillonite thin film that can exist stably in solution, concrete steps are as follows:

[0026] 1) Disperse 1.5g lithium-based montmorillonite sample in pure water to prepare 30mL of 5wt% lithium-based montmorillonite slurry with a strength of 267W / cm 2 Under the condition of ultrasonic stripping for 10 minutes, the montmorillonite film A1 was prepared by vacuum filtration, and the montmorillonite film A1 was separated from the filter membrane;

[0027] 2) Montmorillonite film A1 was dried at 60°C for 15 hours, then annealed at 100°C for 6 hours, and then annealed at 230°C for 24 hours to obtain montmorillonite film sample A2, which is stable in water There are more than 28d.

[0028] Such as figure 1 As shown, the stability of montmorillonite film A1 in water is poor, and it will be completely disintegrated after soaking for 1 hour; after two stages of low-temperature annealing treatment, the stability of montmorillonite film ...

Embodiment 3

[0031] A kind of preparation method of the montmorillonite thin film that can exist stably in solution, concrete steps are as follows:

[0032] 1) Disperse 3g of Na-montmorillonite sample in pure water to prepare 30mL of 10wt% Na-montmorillonite slurry with a strength of 267W / cm 2 Under the condition of ultrasonic stripping for 10 minutes, the montmorillonite film A1 was prepared by vacuum filtration, and the montmorillonite film A1 was separated from the filter membrane;

[0033] 2) Dry the montmorillonite film A1 at 60°C for 15 hours, then anneal at a low temperature at 100°C for 6 hours, and then anneal at a low temperature at 230°C for 24 hours to obtain a montmorillonite film sample A2, which can be prepared in KCl salt It is stable in solution (1M) for more than 28d.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of a montmorillonite film capable of stably existing in a solution. The preparation method comprises the following steps: 1) dispersing a certain amount ofmontmorillonite in a solvent, and preparing a montmorillonite film A1 through vacuum filtration; and 2) drying the montmorillonite film A1 obtained in the step 1) for 10-20 hours at the temperature of 20-70 DEG C, carrying out low-temperature annealing treatment for 5-10 hours at the temperature of 90-120 DEG C, and carrying out low-temperature annealing treatment for 20-30 hours at the temperature of 200-500 DEG C to obtain a montmorillonite film A2 which can stably exist in a solution. The montmorillonite film capable of stably existing in the solution is prepared through vacuum filtration,simple low-temperature heat treatment and annealing treatment, an organic modifier does not need to be introduced, operation is easy, the influence of the low-temperature annealing process on the structure of an ordered layer in the film is small, and the obtained annealed montmorillonite film can stably exist in the solution for 28 d or above; and long-term stable application of the montmorillonite film is facilitated.

Description

technical field [0001] The invention belongs to the field of montmorillonite processing, and in particular relates to a preparation method of a montmorillonite film that can exist stably in a solution. Background technique [0002] Montmorillonite is a typical 2:1 layered clay mineral, which is widely used in environmental protection, construction, medical treatment, metallurgy, petroleum, chemical industry and other fields. Thanks to the natural layered structure and excellent adsorption properties of montmorillonite, which is cheap, environmentally friendly, and has high chemical and thermal stability, montmorillonite has been widely used in the research and preparation of new high-efficiency condensate. Advanced mineral functional materials such as gel adsorbents and mineral-based heat storage materials. [0003] Since the surface of montmorillonite is naturally negatively charged and highly hydrophilic, it is prone to hydration swelling and peeling off in water. The iso...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30B01D67/00B01D71/02C01B33/40
CPCB01J20/12B01J20/28033B01D71/02B01D67/0039C01B33/40B01J2220/4806
Inventor 赵云良白皓宇宋少先任博王伟
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap