Polylactic acid based composite material and preparation method and application thereof

A composite material, polylactic acid technology, applied in the field of polylactic acid-based composite materials and its preparation, can solve the problems of hard and brittle polylactic acid with poor mechanical properties and products that cannot meet the requirements

Inactive Publication Date: 2016-08-17
SHENZHEN PRINCE NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Blister molded products have high requirements on material thermal properties, mold release, impact resistance, toughness, etc., but polylactic acid itself is hard and brittle with poor mechanical properties, and the products after blistering cannot meet the requirements, so modification research is needed

Method used

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  • Polylactic acid based composite material and preparation method and application thereof

Examples

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Effect test

preparation example Construction

[0034] like figure 1 The preparation method of the above-mentioned polylactic acid-based composite material shown comprises the steps:

[0035] S10, according to the number of parts by mass, 65-90 parts of polylactic acid, 5-20 parts of aliphatic-aromatic copolyester, 3-8 parts of compatibilizer and 10-20 parts of modified inorganic filler Mix evenly to obtain primary mix.

[0036] The operation of mixing evenly can be completed by high-speed stirring equipment. Before mixing the raw materials, it is also necessary to dry the above raw materials. Specifically, the raw materials may be dried in a vacuum oven at 80° C. for 8 hours.

[0037] The polylactic acid has a weight average molecular weight of 100,000-180,000 and a molecular weight distribution index of 1.2-2.

[0038] Preferably, the polylactic acid has a weight average molecular weight of 130,000-170,000 and a molecular weight distribution index of 1.3-1.6.

[0039] The modified inorganic filler is obtained by surfa...

Embodiment 1

[0053] Preparation of inorganic filler surface-treated by coupling agent.

[0054] Titanium dioxide is selected as the inorganic filler, TMC-201 is used as the coupling agent, and the raw materials are weighed according to the weight ratio of titanium dioxide: TMC-201=100:2.5.

[0055] Add the coupling agent into the isopropanol solution, stir at room temperature for 0.5h to obtain an organic solution of the coupling agent; add the inorganic filler into the high-speed stirrer, heat up to 60°C, and spray it into the coupling agent while stirring at a low speed (650rpm). The organic solution of the coupling agent, after adding the organic solution of the coupling agent, continue to stir at high speed (1500rpm) for 15 minutes; finally dry it at 80°C for 4 hours to obtain the inorganic filler surface-treated by the coupling agent.

Embodiment 2

[0057] Preparation of inorganic filler surface-treated by coupling agent.

[0058] Titanium dioxide and zinc white powder were selected as inorganic fillers, TMC-101 was used as a coupling agent, and the raw materials were weighed according to the weight ratio of titanium dioxide: zinc white powder: TMC-101 = 50:50:3.5.

[0059] Using the above-mentioned raw materials, according to the surface treatment process in Example 1, an inorganic filler surface-treated with a coupling agent was prepared.

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Abstract

The invention discloses a polylactic acid based composite material comprising the components in parts by mass: 65 parts to 90 parts of polylactic acid, 5 parts to 20 parts of fat-aromatic copolyester, 3 parts to 8 parts of a compatible agent and 10 parts to 20 parts of a modified inorganic filler; the weight-average molecular weight of polylactic acid is 100 thousand to 180 thousand, and the molecular weight distribution index is 1.2-2; the modified inorganic filler is obtained by carrying out surface active treatment on an inorganic filler by a coupling agent. The polylactic acid-based composite material has the mechanical performance improved by adding the fat-aromatic copolyester. Compared with a single polylactic acid material, the mechanical strength of the polylactic acid composite material is better. The invention also discloses a preparation method of the polylactic acid-based composite material, and discloses an application of the polylactic acid based composite material in the fields of preparation of packaging materials and disposable tableware.

Description

technical field [0001] The invention relates to a biodegradable material, in particular to a low-cost polylactic acid-based composite material with high toughness and high heat resistance that can be used as a general-purpose resin for injection molding, suction molding, and blow molding processes, and its preparation method and application . Background technique [0002] In recent years, based on the consideration of non-renewable energy sources such as petroleum and environmental protection, countries around the world have extensively carried out research and development of non-petroleum-based biodegradable materials, and polylactic acid is considered to be one of the most promising alternatives to traditional plastics. The raw material of polylactic acid is fermented from corn, and it can produce fully degradable plastics, which can be decomposed into carbon dioxide and water after the action of microorganisms. Therefore, it has broad market prospects for applications in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08K9/04C08K3/22
Inventor 牛准汪学文
Owner SHENZHEN PRINCE NEW MATERIALS CO LTD
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