Biodegradable plastic with antibacterial property and preparation method thereof

A biodegradable plastic, antibacterial technology, applied in the direction of organic dyes, chemical instruments and methods, natural dyes, etc., can solve the problems of human and environmental hidden dangers, poor molding performance, toxic chemicals, etc., to achieve easy degradation, good quality Antibacterial, rich source effect

Active Publication Date: 2010-11-10
浙江温州轻工研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of plastic products is difficult to degrade, and the molding and processing performance is poor. During processing, additives such as pigments, plasticizers, and anti-aging agents need to be added. These chemicals are toxic, causing harm to humans and the environment during use. common hidden danger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The first step is to wash, dry and crush the roots of rhubarb; in parts by mass, use ethanol at 45°C with an ultrasonic frequency of 10KHz to 20KHz and alternately ultrasonicate the crushed plants at a material-to-liquid ratio of 1:1. Extract for 1.6 hours, cool to room temperature, filter with suction, concentrate the filtrate, and freeze-dry to obtain a yellow powdery antibacterial plant-derived dye;

[0032] In the second step, the biodegradable material PBS masterbatch is put into an internal mixer to heat, and after the above-mentioned PBS masterbatch is completely melted, the rhubarb antibacterial plant source extracted from the first step with a mass percentage of 0.3% is added therein Dye, dispersant EVA-3 with a mass percentage of 0.15%, and coupling agent KH-550 with a mass percentage of 0.15%, knead at 110°C for 16 minutes, stir and mix the added materials, and take them out after natural cooling. Biodegradable plastics with antibacterial properties.

[0033...

Embodiment 2

[0035] The first step is to wash, dry and crush the roots of rhubarb; in parts by mass, use acetone at 25°C, ultrasonic frequency 50KHz-80KHz and alternately apply ultrasonic waves for 30s at a material-to-liquid ratio of 1:50. Extract for 0.1h, cool to room temperature, filter with suction, concentrate the filtrate, and freeze-dry to obtain a yellow powdery antibacterial plant-derived dye;

[0036] In the second step, the biodegradable material PBS masterbatch is put into an internal mixer to heat, and after the above-mentioned PBS masterbatch is completely melted, the rhubarb antibacterial plant source extracted from the first step with a mass percentage of 0.01% is added to it Dyes, dispersant CH-2C with a mass percentage of 10%, and coupling agent TTOPP-38S with a mass percentage of 0.3%, kneaded at 80°C for 25 minutes, stirred and mixed the added materials, and took them out after natural cooling. Biodegradable plastics with antibacterial properties.

[0037] The effect ...

Embodiment 3

[0039] In the first step, rhubarb roots are washed, dried, and crushed; in parts by mass, the crushed plants are mixed with 0.2% Na 2 CO 3 Ultrasonic extraction at 60°C with an ultrasonic frequency of 35KHz-40KHz and 60s alternately for 15h, after cooling to room temperature, suction filtration, concentration of the filtrate, freeze-drying to obtain a yellow powder antibacterial plant-derived dye.

[0040] In the second step, the biodegradable material PBS-COOH masterbatch is put into an internal mixer to heat, and after the above-mentioned PBS-COOH masterbatch is completely melted, the rhubarb extracted from the first step with a mass percentage of 5% is added to it Antibacterial plant source dye, dispersant 295A with a mass percentage of 8%, and coupling agent ModA with a mass percentage of 4.2%, kneaded at 115°C for 40 minutes, stirred and mixed the added materials, and took them out after natural cooling to prepare Biodegradable plastics with antibacterial properties.

...

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Abstract

The invention provides a biodegradable plastic with antibacterial property and a preparation method thereof. The biodegradable plastic with antibacterial property comprises biodegradable plastic matrix and antibacterial plant source dyes which are dispersed in the biodegradable plastic matrix, wherein the mass ratio of the antibacterial plant source dyes to the biodegradable plastic matrix is (0.01-10):100. The invention simply and fast extracts various antibacterial plant source dyes and prepares the biodegradable plastic which is the effective constituent of the various antibacterial plant source dyes, so that the plastic not only is biodegradable but also has good antibacterial property. The biodegradable plastic changes the crystallization property of the existing plastic since the dyes play a part in nucleating agent, is more easily degraded after the plastic product is abandoned, is environment-friendly, and has the degradation rate which is more than 90% after being putted in compost, active sludge and soil for 6 months.

Description

【Technical field】 [0001] The invention relates to a biodegradable plastic, in particular to a biodegradable plastic with antibacterial properties. 【Background technique】 [0002] At present, there are many kinds of plastic products on the market in our country, most of which are mainly polyvinyl chloride (PVC) raw materials. This kind of plastic products is difficult to degrade, and the molding and processing performance is poor. During processing, additives such as pigments, plasticizers, and anti-aging agents need to be added. These chemicals are toxic, causing harm to humans and the environment during use. common risk. With the increasing awareness of safety, countries such as the European Union, the United States, Japan, and Russia are constantly revising relevant safety standards and related laws. The phenomenon that the content of toxic substances in my country's plastic products is found to exceed the standard occurs from time to time, seriously affecting China's in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K5/00C09B61/00C08J3/20
Inventor 张敏宋洁安莎莎
Owner 浙江温州轻工研究院
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