Multi-layer stacked composite material and preparation method and application thereof

A composite material and sheet technology, applied in chemical instruments and methods, application, lamination, etc., can solve the problems of high equipment cost, complex process, high energy consumption, etc., to improve barrier performance and shape memory performance, and improve comprehensive performance , The effect of simple processing technology

Active Publication Date: 2021-06-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the Chinese patent document CN201210474211.X, multi-layer superimposed composite materials are prepared by first casting into a film and then hot-pressing, which can be applied to orthopedic materials, but this method is complex in process, and the use of a large amount of organic solvents will pollute the environment, and the yield obtained is small
In the Chinese patent document 201910903673.0, the use of dopamine polymerization modified PP film to coat the graphene layer and superimpose hot-pressed multi-layer film not only takes a long time for chemical modification but also makes mass production difficult.
In the Chinese p

Method used

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  • Multi-layer stacked composite material and preparation method and application thereof
  • Multi-layer stacked composite material and preparation method and application thereof
  • Multi-layer stacked composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In the present embodiment, the preparation method of 5 layers of PPC / modified thermoplastic starch (TPS) / CNC composite material is as follows:

[0034] Step (1), after taking by weighing 420g of dried cornstarch, 180g glycerol and 2.1g tartaric acid and stirring evenly, obtain modified TPS by granulating through a twin-screw extruder, wherein the rotating speed is 80r / min, and the feeding port of the extruder The heating temperature of each section of the machine head is: T1=90°C, T2=120°C, T3=130°C, T4=140°C, T5=145°C, T6=145°C, T7=140°C, T8=135°C.

[0035] Step (2), PPC (Henan Tianguan Group Co., Ltd., Mw=58700g / mol) weighs 450g, takes the modified TPS in step (1) and weighs 50g, and obtains PPC / modified TPS by water-cooling granulation through a twin-screw extruder. TPS composite material, wherein the rotation speed is 80r / min, the heating temperature of each section from the feed port to the head of the extruder is: T1=110°C, T2=120°C, T3=130°C, T4=135°C, T

Embodiment 2

[0041] In this example, the preparation method of 10 layers of PPC / modified TPS / CNC composite material is as follows:

[0042] Step (1), after taking by weighing 420g of dried cornstarch, 180g glycerol and 2.1g tartaric acid and stirring evenly, the modified TPS granulated by a twin-screw extruder, wherein the rotating speed is 80r / min, the feed port of the extruder The heating temperature of each section of the machine head is: T1=90°C, T2=120°C, T3=130°C, T4=140°C, T5=145°C, T6=145°C, T7=140°C, T8=135°C.

[0043] Step (2), PPC (Henan Tianguan Group Co., Ltd., Mw=58700g / mol) weighs 450g, takes the modified TPS in step (1) and weighs 50g, and obtains PPC / modified TPS by water-cooling granulation through a twin-screw extruder. TPS composite material, wherein the rotation speed is 80r / min, the heating temperature of each section from the feed port to the head of the extruder is: T1=110°C, T2=120°C, T3=130°C, T4=135°C, T5=140 °C, T6=140°C, T7=120°C, T8=120°C.

[0044]

Embodiment 3

[0048] In the present embodiment, the preparation method of 5 layers of PPC / modified TPS / CNC composite material is as follows:

[0049] Step (1), after taking by weighing 420g of dried cornstarch, 180g glycerol and 2.1g tartaric acid and stirring evenly, the modified TPS granulated by a twin-screw extruder, wherein the rotating speed is 80r / min, the feed port of the extruder The heating temperature of each section of the machine head is: T1=90°C, T2=120°C, T3=130°C, T4=140°C, T5=145°C, T6=145°C, T7=140°C, T8=135°C.

[0050] Step (2), get 44.5g dry PPC, modified TPS 5g and 0.5g CNC in step (1) to prepare PPC / modified TPS / CNC composite material by Haake torque rheometer, wherein heating temperature 130 ℃, rotor speed 60 rpm.

[0051] In step (3), the composite material in step (2) is molded into a plastic sheet by a flat vulcanizing machine, specifically preheated for 5 minutes, pressurized for 5 minutes, cooled for 3 minutes, the temperature is 130° C., and the pressure

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Abstract

The invention relates to a multi-layer superposed composite material and a preparation method and application thereof. The multi-layer superposed composite material is prepared by the steps: carrying out mold pressing or extrusion molding on polymethyl ethylene carbonate (PPC)/nano microcrystalline cellulose (CNC), PPC/modified starch (TPS) and a PPC/modified TPS/CNC composite material prepared by melting, into a sheet material, cutting and alternately superposing; and then preparing the multi-layer PPC/modified TPS/CNC composite material with more excellent barrier property and mechanical property by a hot press molding method. The mechanical strength of the full-biodegradable PPC/modified TPS/CNC composite material can be improved through a multi-layer composite superposition molding technology, the shape recovery rate of the material is improved, the water vapor barrier rate of the material is reduced, and the application field is widened. Solvent treatment is not needed in the preparation process, and environmental pollution is avoided.

Description

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Claims

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Application Information

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Owner SOUTH CHINA UNIV OF TECH
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