Method for preparing biodegradable polyester and original montmorillonoid soil nano composite material

A technology of biodegradable polyester and nanocomposite materials, applied in the field of montmorillonite nanocomposite materials, can solve the problems of time and energy consumption, increased steps, fewer reports, etc., and achieve improved barrier properties, use temperature, and gas barrier properties Good, high mechanical strength effect

Inactive Publication Date: 2011-10-05
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are fewer patents involving polycaprolactone-montmorillonite nanocomposites
In addition, the reported biodegradable polyester montmorillonite nanocomposites generally use organically modified montmorillonite. Since the original montmorillonite soil is difficult to disperse well, the biodegradable polyester montmorillonite original soil nanocomposite Materials are less reported
[0003] Patents ZL01109463.X and 200510002216.2 disclose the method of preparing organic intercalated montmorillonite composite materials by organic solvent dispersion method. The former method needs to use organic phase conversion to pre-disperse the aqueous phase of montmorillonite, which makes the industrial application operation cumbersome, time-consuming and energy-consuming The latter method requires the use of a large amount of stabilizers, and the organic treatment of montmorillonite increases the complexity of the operation, and the small molecules used in the treatment of organic montmorillonite will inevitably reduce the thermal stability of the material

Method used

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  • Method for preparing biodegradable polyester and original montmorillonoid soil nano composite material
  • Method for preparing biodegradable polyester and original montmorillonoid soil nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of biodegradable polyester montmorillonite raw soil nano-composite material, the method comprises the following steps:

[0023] (1) Montmorillonite (cation exchange capacity 85mequiv·100g -1 ) was dispersed in deionized water, stirred at 70° C. for 4 hours to obtain a suspension of montmorillonite with a concentration equal to 2 wt %;

[0024] (2) dissolving polycaprolactone (PCL) in N, N-dimethylformamide to make a polycaprolactone solution with a concentration equal to 5wt%;

[0025] (3) Mix the above PCL solution and montmorillonite suspension according to the mass ratio (100:0; 97.5:2.5; 95:5; 91:9; 82:18; 78:22) and mix them evenly at a temperature lower than 120°C The polycaprolactone montmorillonite native soil nanocomposite was prepared by evaporating the solvent, wherein the montmorillonite content was 0wt%, 1wt%, 2wt%, 4wt%, 8wt%, and 10wt%.

[0026] Compared with the montmorillonite content of 0wt%, the polycaprolactone montmorillonite ...

Embodiment 2

[0031] A preparation method of biodegradable polyester montmorillonite raw soil nano-composite material, the method comprises the following steps:

[0032] (1) Montmorillonite (cation exchange capacity 85mequiv·100g -1 ) was dispersed in deionized water, stirred at 70°C for 4 hours to obtain a concentration equal to 4wt%;

[0033] (2) dissolving polylactic acid (PLA) in N,N-dimethylacetamide to make a polylactic acid solution with a concentration equal to 10wt%;

[0034] (3) Mix the above PLA solution and montmorillonite suspension according to the mass ratio (100:0; 97.5:2.5; 95:5; 91:9; 82:18; 78:22) and mix them evenly at a temperature lower than 120°C The polylactic acid montmorillonite original soil nanocomposite was prepared by evaporating the solvent, wherein the montmorillonite content was 0wt%, 1wt%, 2wt%, 4wt%, 8wt%, and 10wt%.

[0035] Compared with the montmorillonite content of 0wt%, the heat resistance, barrier and service temperature of polylactic acid montmor...

Embodiment 3

[0040] A preparation method of biodegradable polyester montmorillonite raw soil nano-composite material, the method comprises the following steps:

[0041] (1) The montmorillonite original soil (cation exchange capacity greater than 45mequiv·100g -1 ) was dispersed in deionized water, stirred at 50° C. for 6 hours to obtain a montmorillonite suspension with a concentration equal to 5 wt %;

[0042] (2) dissolving technical-grade polycaprolactone (PCL) in technical-grade N,N-dimethylformamide to make a polycaprolactone solution with a concentration equal to 20wt%;

[0043] (3) Mix the above PCL solution and montmorillonite suspension according to the mass ratio (100:0; 96:4; 92.5:7.5; 85.7:14.3; 74:26; 69:31), and volatilize at a temperature of 100°C The polycaprolactone montmorillonite native soil nanocomposite material is prepared from the solvent, wherein the montmorillonite content is 0wt%, 1wt%, 2wt%, 4wt%, 8wt%, and 10wt%.

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Abstract

The invention relates to a method for preparing a biodegradable polyester and original montmorillonoid soil nano composite material. The method comprises the following steps: dispersing montmorillonoid into deionized water, and stirring the mixture for 2 to 6 hours at the temperature of between 50 and 90 DEG C to obtain montmorillonoid suspension for later use; and dissolving biodegradable polyester into a solvent to form biodegradable polyester solution; mixing the montmorillonoid suspension and the biodegradable polyester solution evenly, volatilizing the solvent at the temperature of lowerthan 150 DEG C to obtain the biodegradable polyester and original montmorillonoid soil nano composite material, wherein the content of the montmorillonoid in the nano composite material is 0.01 to 10percent by weight. Compared with the prior art, the method has the advantages of reasonable process and simple operation, and can use the organic solvent to directly disperse the original montmorillonoid soil to prepare the biodegradable polyester and original montmorillonoid soil nano composite material; and the performance of the nano composite material is greatly improved in the aspects of heat resistance, isolation property, operating temperature and the like, and the nano composite material can be widely applied in the fields of environment-friendly packing materials and medical materials.

Description

technical field [0001] The invention relates to a montmorillonite nanocomposite material, in particular to a preparation method of a biodegradable polyester montmorillonite raw soil nanocomposite material. Background technique [0002] Polyester montmorillonite nanocomposites are a class of materials that have attracted much attention. Among them, two biodegradable materials, polycaprolactone (PCL) and polylactic acid (PLA), are particularly promising, and can be used in high-quality packaging materials and medical applications. material field. The methods for preparing polylactic acid montmorillonite nanocomposites in published patents are mainly divided into two categories: one is the melt blending method, such as patents 200710171659.3, 200610149937.0, 200710072224.3, 200510043166.2, 200510030494.9; the other is the in-situ blending method, For example, patent 200510023647.7. However, there are fewer patents involving polycaprolactone-montmorillonite nanocomposites. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/215C08L67/04C08K3/34
Inventor 吴同飞杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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