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Polylactic acid degradable composite material and preparation method thereof

A composite material and polylactic acid technology, applied in the field of polylactic acid degradable composite material and its preparation, can solve the problems of difficult to achieve manufacturing cost and performance, and achieve the effects of fine particles, reduced production cost and strong mechanical strength

Inactive Publication Date: 2015-08-26
常州龙骏天纯环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is difficult to achieve the ideal manufacturing cost and performance

Method used

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  • Polylactic acid degradable composite material and preparation method thereof
  • Polylactic acid degradable composite material and preparation method thereof
  • Polylactic acid degradable composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The raw material components are:

[0024]

[0025] Dry the nanocellulose, polylactic acid particles, and starch in a vacuum oven at 70°C for 24 hours, and mix the dried nanocellulose, polylactic acid particles, starch, glycerin, and antioxidant in proportion. Extrude and granulate through a twin-screw extruder. The screw temperatures of the extruder are 130°C, 165°C, 175°C, 180°C, 180°C, and 170°C respectively. The speed of the main screw is controlled at 80r / min, and the speed of the feeding screw is 10r / min, the extruded product is cooled and pelletized to obtain a polylactic acid degradable composite material. The obtained composite material particles were vacuum-dried at 60° C. for 18 hours to obtain the target product.

Embodiment 2

[0027] The raw material components are:

[0028]

[0029]

[0030] Dry the nanocellulose, polylactic acid particles, and starch in a vacuum oven at 70°C for 24 hours, and mix the dried nanocellulose, polylactic acid particles, starch, glycerin, and antioxidant in proportion. Extrude and granulate through a twin-screw extruder, the screw temperature of the extruder is 135°C, 170°C, 175°C, 180°C, 180°C, 170°C, the speed of the main screw is controlled at 80r / min, and the speed of the feeding screw is 10r / min, the extrudate is cooled and pelletized to obtain a polylactic acid degradable composite material. The obtained composite material particles were vacuum-dried at 60° C. for 18 hours to obtain the target product.

Embodiment 3

[0032] The raw material components are:

[0033]

[0034] Dry the nanocellulose, polylactic acid particles, and starch in a vacuum oven at 70°C for 24 hours, and mix the dried nanocellulose, polylactic acid particles, starch, glycerin, and antioxidant in proportion. Extrude and granulate through a twin-screw extruder. The screw temperatures of the extruder are 135°C, 175°C, 180°C, 185°C, 185°C, and 170°C. The speed of the main screw is controlled at 80r / min, and the speed of the feeding screw is 10r / min, the extruded product is cooled and pelletized to obtain a polylactic acid degradable composite material. The obtained composite material particles were vacuum-dried at 60° C. for 18 hours to obtain the target product.

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PUM

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Abstract

The invention discloses a polylactic acid degradable composite material, comprising the following components in parts by weight: 40-70 parts of polylactic acid, 10-50 parts of filler, 2-10 parts of glycerinum and 0.2-2 parts of antioxygen. In order to reduce the manufacturing costs of the polylactic acid, starch with good biological degradability is added as the filler when in preparation, as the starch is abundant in resource, low in cost and fine in particle, so that the manufacturing costs of the polylactic acid can be reduced; however, the polylactic acid is not ideal enough in mechanical property due to the addition of the starch, in order to overcome the defect, nano-crystalline cellulose is added as an additive, as the nano-crystalline cellulose is strong in mechanical strength, the defect that the composite material is insufficient in mechanical strength due to the addition of the starch is made up, and thereby the composite strength still has high mechanical strength even lots of starch is filled.

Description

technical field [0001] The invention relates to a polymer composite material and a preparation method thereof, in particular to a polylactic acid degradable composite material and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is widely used in many fields, such as biomedicine, because of its biodegradability, biocompatibility, thermoplasticity, easy processing and excellent mechanical properties. However, the production cost of polylactic acid is relatively high compared to the polymers commonly used in industry. Polylactic acid itself has some defects, such as its poor mechanical properties, barrier properties and heat resistance, which limit the application of polylactic acid. In response to these shortcomings of polylactic acid, people began to study the modification of polylactic acid. At present, the most widely used modification methods are mainly blending modification. But it is difficult to achieve ideal manufacturing cost and pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/02C08L1/02C08K5/134C08K5/053
Inventor 支朝晖李炳健
Owner 常州龙骏天纯环保科技有限公司
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