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Plasticized polylactic acid/inorganic nano composite material and preparation method thereof

A technology of plasticized polylactic acid and inorganic nanometers, which is applied in the field of composition and preparation of plasticized polylactic acid/inorganic nanocomposites, plasticized polylactic acid/inorganic nanocomposites, to save the process, excellent processing performance, and easy preparation The effect of simple method

Inactive Publication Date: 2010-11-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses nano-sol instead of nano-powder to carry out blending modification of polylactic acid, which solves the problem of dispersion of nanoparticles, thereby improving the toughness and processing fluidity of polylactic acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The material provided by the invention is formulated by weight ratio from the following raw materials:

[0017] D-polylactic acid 85 parts

[0018] 15 parts of liquid polyethylene glycol

[0019] Nano silicon dioxide 0.5 parts

[0020] First, the liquid polyethylene glycol in the above raw materials is mixed with nano-silica with a high-shear emulsifier for 5 minutes to obtain a nano-sol; then the prepared nano-sol is injected into a twin-screw extruder through a metering pump. Melt blending with polylactic acid out of the machine to obtain plasticized polylactic acid / inorganic nanocomposite material. The barrel temperature of the extruder is 140-190° C., and the screw speed is 100 rpm.

Embodiment 2

[0022] The material provided by the invention is formulated by weight ratio from the following raw materials:

[0023] L-polylactic acid 90 parts

[0024] Liquid polyethylene glycol 10 parts

[0025] Nano silicon dioxide 1.0 parts

[0026] Firstly, the liquid polyethylene glycol in the above-mentioned raw materials is mixed with nano-silica with an emulsification pump for 10 minutes to obtain a nano-sol; then the prepared nano-sol is injected into a twin-screw extruder and The polylactic acid is melt-blended to obtain a plasticized polylactic acid / inorganic nanocomposite material. The barrel temperature of the extruder is 160-200° C., and the screw speed is 140 rpm.

Embodiment 3

[0028] The material provided by the invention is formulated by weight ratio from the following raw materials:

[0029] 75 parts of L-polylactic acid

[0030] Liquid polypropylene glycol 25 parts

[0031] Nano montmorillonite 5.0 parts

[0032] First, the liquid polypropylene glycol in the above raw materials and nano-montmorillonite are mixed with an ultra-speed mixer for 10 minutes to obtain a nano-sol; then the prepared nano-sol is injected into a twin-screw extruder and polylactic acid through a metering pump. Melting and blending is carried out to obtain the plasticized polylactic acid / inorganic nanocomposite material. The barrel temperature of the extruder is 170-200° C., and the screw speed is 200 rpm.

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PUM

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Abstract

The invention discloses a plasticized polylactic acid / inorganic nano composite material and a preparation method thereof. The method comprises: firstly, mixing a plasticizer and nano particles in equipment such as a high shear emulsifying machine to prepare nano sol; and secondly, filling the nano sol into a double-screw extruder by a metering pump to blend the nano sol with the polylactic acid to obtain the plasticized polylactic acid / inorganic nano composite material. The material can be used to make products by die pressing, extruding, plastic injection and other processes. The products are used in fields of medical care, home appliances, package and the like. Compared with common polylactic acid materials which are widely used at present, the material has higher ductility and higher processing flowability.

Description

technical field [0001] The invention relates to a plasticized polylactic acid / inorganic nanocomposite material, more specifically to a composition and preparation method of a plasticized polylactic acid / inorganic nanocomposite material, and belongs to the fields of polymer blending and polymer molding processing. Background technique [0002] Polylactic acid (PLA) is a new type of biodegradable polymer material chemically synthesized from lactic acid as a monomer. It is non-toxic, non-irritating, and has good compostability. It can be biodegraded into CO 2 and H 2 O, will not pollute the environment. Since polylactic acid is a biopolymer made of biomass resources, it gets rid of the dependence on petroleum resources, and the manufacturing process has a small load on the environment, which can meet the requirements of sustainable development to a large extent. Polylactic acid not only has good biocompatibility and degradability, but also has good mechanical properties, tran...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K13/02C08K5/11C08K5/12C08K5/053C08K5/103C08K3/36C08K3/26C08K3/34
Inventor 唐颂超顾艳群潘泳康王庆海
Owner EAST CHINA UNIV OF SCI & TECH
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