Method for preparing high-filling hydrotalcite/rubber nanometer composite material

A composite material and rubber nanotechnology, which is applied in the field of preparation of high-filled hydrotalcite/rubber nanocomposite materials, can solve the problem of inability to achieve nanoscale dispersed hydrotalcite/natural rubber composite materials, high lamellar charge density, and damage to latex stability, etc. question

Inactive Publication Date: 2015-01-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with layered silicates, hydrotalcite sheets are covered with positive charges and have a high sheet charge density. However, the reason why latex can exist stably is that the emulsifier coated with latex particles is easy to ionize hydrogen ions in water. As a result, the surface of the latex has a negative charge, and the negative charges repel each other, so when the hydrotalcite is add...

Method used

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  • Method for preparing high-filling hydrotalcite/rubber nanometer composite material
  • Method for preparing high-filling hydrotalcite/rubber nanometer composite material
  • Method for preparing high-filling hydrotalcite/rubber nanometer composite material

Examples

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Embodiment 1

[0030] The hydrotalcite / styrene-butadiene rubber composite material of the present invention according to the following raw material formula and steps.

[0031] a. Preparation of hydrotalcite suspension and flocculation water

[0032] (1) Preparation of hydrotalcite suspension

[0033] First, 100 ml of suspending agent (water) is added to 1 g of hydrotalcite to prepare a hydrotalcite suspension for subsequent use.

[0034] (2) Preparation of flocculation water

[0035] Add 30g of analytically pure CaCl to 3000g of water 2 Prepare flocculation water for use.

[0036] b. Some raw materials are pre-mixed

[0037] Put the styrene-butadiene rubber latex in the pre-mixing stirring tank, the styrene-butadiene rubber is 100g in terms of dry rubber, then add 0g of surfactant, stir and mix for 10 minutes, then add the hydrotalcite suspension prepared in step a (1) , stir and mix for 30 minutes and set aside.

[0038] c. Flocculation

[0039] In the flocculation tank, add the floc...

Embodiment 2

[0044] According to the method and steps of Example 2, the difference is that the mass of hydrotalcite in step a (1) is 3g, and the hydrotalcite / styrene-butadiene rubber nanocomposite material of the present invention is prepared.

Embodiment 3

[0046] According to the method and steps of Example 1, the difference is that the mass of hydrotalcite in step a (1) is 5 g, and the hydrotalcite / styrene-butadiene rubber nanocomposite material of the present invention is prepared.

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Abstract

The invention discloses a method for preparing a high-filling hydrotalcite/rubber nanometer composite material. Because the outermost layer of rubber emulsion particles is provided with negative charges, and the surface of supramolecular filler hydrotalcite is provided with positive charges to cause demulsification of rubber latex, a process for preparing the high-filling hydrotalcite/rubber composite material is difficult to realize by utilizing an emulsion compounding method. The method comprises the following steps: by utilizing an emulsion compounding method, adding a surfactant of a certain concentration into the rubber emulsion, stirring to be uniform, adding hydrotalcite suspension, and successfully preparing the high-filling hydrotalcite/rubber composite material. According to a laminated effect of hydrotalcite, the composite material is endowed with relatively excellent air tightness, relatively high crack propagation resistance and relatively high mechanical property.

Description

Technical field: [0001] The invention relates to the preparation of a highly filled hydrotalcite / rubber nano composite material. In particular, a certain amount of surfactant is added to the rubber latex to prepare a highly filled hydrotalcite / rubber composite material. Background technique: [0002] Hydrotalcite is a layered double metal hydroxide (Layered Double Hydroxide Compounds, LDHs for short). Agents, bactericidal materials, adsorbents and anion exchangers, etc. LDHs belong to the hexagonal crystal system, and its structure can be scientifically controlled. Two-dimensional crystals with similar aspect ratios and large aspect ratios can be obtained. The crystal structure is approximately circular. Due to its simple preparation conditions and mild homogenization process, crystals Higher regularity and fewer edge defects can have the best effect on gas barrier. Moreover, the surface of LDHs contains a large number of hydroxyl functional groups, which can significantl...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08L7/00C08L9/02C08K13/02C08K3/26C08K3/22C08K5/09
CPCC08K13/02C08K3/22C08K3/26C08K5/09C08K2003/2296
Inventor 刘力张树柏李宁徐颖温世鹏张立群
Owner BEIJING UNIV OF CHEM TECH
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