Biodegradable plastic with high starch content and preparation method of biodegradable plastic

A technology of biodegradable plastics and high starch, applied in the field of biodegradable plastics and its preparation, can solve the problems of modification additives that are not environmentally friendly, bioplastics are difficult to plasticize, and the mechanical properties of products are poor, achieving large market potential and easy control , low-cost effect

Inactive Publication Date: 2014-06-18
宋旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the defects of current bioplastics with high starch content, such as difficult plasticization, difficult processing, poor product mechanical properties, poor water resistance, high cost, and some currently used modification additives are not environmentally friendly and non-degradable, etc., to provide A biodegradable plastic with high starch content prepared by a new composite plasticizing system;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A biodegradable plastic with high starch content and a preparation method thereof, the components included in the biodegradable plastic by mass and the preparation method are as follows:

[0034] (1) Weigh 45kg cornstarch, 0.5kg glycerin, 0.4kg polyethylene glycol (PEG) 200, 0.05kg stearic acid, 0.1kg magnesium stearate, 0.1kg epoxidized soybean oil and add to the preheated Mix in a large-scale high-speed mixer at 70°C for 10 minutes, stir at a low speed and cool down to room temperature, discharge and pack to obtain the cornstarch primary mixture. At the same time, weigh 2kg of polyvinyl alcohol (PVA) 1788, 0.5kg, PEG4000, 0.1kg of glycerin, 0.1kg of PEG200, and 0.05kg of stearic acid and add them to a small high-speed mixer at 30°C for 6 minutes, stir at a low speed and cool down to room temperature , discharging and packaging to obtain the PVA primary mixture.

[0035] (2) Put the corn starch primary mixture and PVA primary mixture obtained in (1) at 50°C and 70°C f...

Embodiment 2

[0040] A biodegradable plastic with high starch content and a preparation method thereof, the components included in the biodegradable plastic by mass and the preparation method are as follows:

[0041] (1) Weigh 40kg of potato starch, 3.1kg of glycerin, 1.1kg of PEG200, 0.55kg of sorbitol, 0.05kg of liquid paraffin, 0.08kg of stearic acid, and 0.1kg of oleic acid amide into a large-scale high-speed mixing machine preheated to 60°C. Mix in an in-machine mixer for 15 minutes, stir at a low speed and cool down to room temperature, discharge and pack to obtain the potato starch primary mixture. At the same time, weigh 0.4kg PVA2092, 0.1kg PEG2000, 3.025kg glycerin, 1.025kg PEG200, 0.02kg stearic acid and add them to a small high-speed mixer at 70°C and mix for 3 minutes, stir at a low speed and cool down to room temperature, discharge and pack to obtain PVA Primer.

[0042] (2) Put the primary mixture of potato starch and PVA obtained in (1) at 55°C and 68°C for 36h and 0.5h res...

Embodiment 3

[0047] A biodegradable plastic with high starch content and a preparation method thereof, the components included in the biodegradable plastic by mass and the preparation method are as follows:

[0048] (1) Weigh 38.3kg of pea starch, 3.25kg of glycerin, 0.04kg of PEG400, 0.10kg of epoxidized soybean oil, 0.08kg of stearic acid, and 0.05kg of ethylene bis-stearamide (EBS) and add them in turn to the preheated to 75°C Mix 12min in the mixer in the large-scale high-speed mixer, stir at low speed and be cooled to room temperature, discharge, pack, obtain the primary mixture of pea starch. At the same time, weigh 0.75kg of PVA1795, 0.5kg of PEG8000, 1.3kg of glycerin, 0.01kg of PEG400, and 0.02kg of stearic acid, and then add them to a small high-speed mixer preheated to 52°C and mix for 2 minutes, stir at a low speed and cool down to room temperature, discharge and pack , to obtain the PVA initial mixture.

[0049] (2) Put the primary mixture of pea starch and PVA obtained in (1...

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Abstract

The invention discloses a biodegradable plastic with high starch content and a preparation method of the biodegradable plastic. The preparation method comprises the steps: with corn starch, potato starch and other natural plant starches as main raw materials, completely biodegradable polyvinyl alcohol as a main toughening agent and polyethylene glycol as an auxiliary toughening agent, adding an environment-friendly composite plasticizer and a processing acid, and mixing all the components to obtain the biodegradable plastic with high starch content. The biodegradable plastic with high starch content, prepared by the invention, contains at most 90wt% of starch, has favorable plasticity and machinability, and can be prepared into products such as pipes, sheets, profiles, films, vessels, foamed base materials and the like with various shapes by using the traditional polymer forming and machining method.

Description

technical field [0001] The invention belongs to the technical field of biodegradable plastics with high starch content and its preparation, and in particular relates to a biodegradable plastic with high starch content and a preparation method. Background technique [0002] In recent years, the environmental problems and energy crisis caused by many petroleum-based synthetic polymer materials have become increasingly serious. For the long-term harmonious development of the environment and the economy, countries around the world have increased research and investment in degradable plastics. The development of biodegradable and environmentally friendly plastics can fundamentally alleviate the problem of "white pollution" and effectively save energy. Compared with other biodegradable polymers, starch has the advantages of wide sources, low price and complete biodegradability, so it plays an important role in the field of biodegradable materials. [0003] Filled starch plastics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L29/04C08L71/08C08K5/00C08K5/092C08K5/09C08K5/053C08J9/04C08J9/08
Inventor 宋旭曹东旭兰小蓉赵剑师石夯卢灿辉
Owner 宋旭
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