CN104672506A - Antibacterial and antifungal biodegradable plastic and preparation method thereof - Google Patents

Abstract

The invention discloses an antibacterial antifungal and biodegradable plastic. The plastic is characterized by being prepared from the following materials in parts by weight: 20-30 parts of potato starch, 3-5 parts of cinnamon powder, 10-15 parts of potato stalks and leaves, 3-5 parts of medical stone powder, 0.5-1 part of tannic acid, 0.5-1 part of boric acid, 1-2 parts of glycerol monolaurate, 3-5 parts of stearic acid, 1-2 parts of oleic acid amide, 10-15 parts of acetyl tri-n-butyl citrate, 0.01-0.02 part of propyl p-hydroxybenzoate and 10-15 parts of polypropylene. The biodegradable plastic disclosed by the invention has good antibacterial, antifungal and biodegradable properties, good heat stability, certain water resistance, good use property and low cost, is prepared from easily-available materials according to a simple and feasible process, and is safe and nontoxic.

Description

A kind of antibacterial and mouldproof biodegradable plastic and preparation method thereof

Technical field

The present invention relates to plastics arts, be specifically related to a kind of antibacterial and mouldproof biodegradable plastic and preparation method thereof.

Background technology

At present, plastics have been widely applied to all respects that people produce, live.Along with the production of plastics and developing rapidly of application, plastics increase and consumption constantly increases.These plastics overwhelming majority is disposable product, and waste plastic is extremely difficult, residual becomes white garbage in the environment, has threatened the balance of ecotope and the mankind, vegeto-animal existence.Meanwhile, because plastics industry is based on oil, and oil and natural gas resource is difficult to meet the growing demand in the whole world, shortage occurs.For plastics pollution, save energy and resource, solve the problems such as raw material sources is not enough, and bio-degradable plastics obtains more concern and development.

Biodegradable plastic can be decomposed by environmental microorganism after referring to and discarding, and is finally degraded into the macromolecular material of the inorganics such as water and carbonic acid gas.Because it does not remain in the environment, can play the effect of good protection of the environment, its application prospect is very wide.In actual use, biodegradable plastic not only needs good degradation property, also should possess excellent use properties and rational cost, is convenient to promote and use.

Summary of the invention

The object of this invention is to provide a kind of antibacterial and mouldproof biodegradable plastic, with low cost, make simple, safety non-toxic, degradation property and use properties good.

The present invention is achieved by the following technical solutions:

A kind of antibacterial and mouldproof biodegradable plastic, it is obtained by the raw material of following weight parts:

Potato starch 20-30, Cortex Cinnamomi powder 3-5, potato haulm 10-15, medical stone powder 3-5, Weibull 0.5-1, boric acid 0.5-1, lauric monoglyceride 1-2, stearic acid 3-5, amine hydroxybenzene 1-2, tributyl acetylcitrate 10-15, propylparaben 0.01-0.02, polypropylene 10-15;

A preparation method for antibacterial and mouldproof biodegradable plastic, it comprises the following steps:

(1) after being mixed with potato haulm by medical stone powder, 100-150 DEG C processes 3-6h, adds potato starch and Cortex Cinnamomi powder after cooling, and co-ground is even, crosses 300-400 mesh sieve, obtains mixed powder;

(2) mixed powder obtained in (1) is added in dehydrated alcohol by solid-liquid weight ratio 1:3-1:4, first ultrasonic disperse 10-15min, add Weibull, boric acid, lauric monoglyceride, stearic acid and propylparaben again, reflux process 3-5h, the desolventizing of cooling final vacuum extrct, obtains mixture;

(3) first by the mixture that obtains in (2) and tributyl acetylcitrate common high-speed mixing 10-20min under 80-100 DEG C of condition, then add amine hydroxybenzene and polypropylene high-speed mixing 15-30min under 120-140 DEG C of condition, obtain mixed resin;

(4) mixed resin obtained in (3) is added twin screw extruder, control temperature is extruded in 150-180 DEG C, after cooling granulation and get final product.

Wherein, utilize Weibull, boric acid, lauric monoglyceride and stearic acid to carry out modification to the stopping composition that potato starch, Cortex Cinnamomi powder, potato haulm, medical stone powder are raw material, the dispersiveness of reinforcing filler, strengthen raw-material consistency, water resistance; In raw material, lauric monoglyceride, propylparaben and Cortex Cinnamomi powder have the synergy of antibacterial and mouldproof, and amine hydroxybenzene can improve lubricity, play collaborative lubrication.

Advantage of the present invention is:

1., by the improvement of recipe optimization, make the biodegradable plastic obtained have good antibacterial and mouldproof performance and biodegradability, Heat stability is good, and have certain water tolerance, use properties is good;

2. the main raw material adopted is with low cost, and raw material is easy to get, and manufacture craft is simple, safety non-toxic, meets the requirement of environmental protection and energy saving.

Embodiment

Non-limiting examples of the present invention is as follows:

A kind of antibacterial and mouldproof biodegradable plastic, is prepared from by the component raw material of following weight (kg):

Potato starch 25, Cortex Cinnamomi powder 4, potato haulm 12, medical stone powder 4, Weibull 0.8, boric acid 0.8, lauric monoglyceride 1.5, stearic acid 4, amine hydroxybenzene 1.5, tributyl acetylcitrate 12, propylparaben 0.015, polypropylene 12;

The preparation method of antibacterial and mouldproof biodegradable plastic comprises the following steps:

(1) after being mixed with potato haulm by medical stone powder, 100-150 DEG C processes 3-6h, adds potato starch and Cortex Cinnamomi powder after cooling, and co-ground is even, crosses 300-400 mesh sieve, obtains mixed powder;

(2) mixed powder obtained in (1) is added in dehydrated alcohol by solid-liquid weight ratio 1:3-1:4, first ultrasonic disperse 10-15min, add Weibull, boric acid, lauric monoglyceride, stearic acid and propylparaben again, reflux process 3-5h, the desolventizing of cooling final vacuum extrct, obtains mixture;

(3) first by the mixture that obtains in (2) and tributyl acetylcitrate common high-speed mixing 10-20min under 80-100 DEG C of condition, then add amine hydroxybenzene and polypropylene high-speed mixing 15-30min under 120-140 DEG C of condition, obtain mixed resin;

(4) mixed resin obtained in (3) is added twin screw extruder, control temperature is extruded in 150-180 DEG C, after cooling granulation and get final product.

Carry out performance test to above-mentioned obtained material, result is as follows:

Biodegradation test: 30d rate of weight loss >=15%;

Tensile strength: 35.6MPa.

Claims (2)

1. an antibacterial and mouldproof biodegradable plastic, is characterized in that, it is obtained by the raw material of following weight parts:

Potato starch 20-30, Cortex Cinnamomi powder 3-5, potato haulm 10-15, medical stone powder 3-5, Weibull 0.5-1, boric acid 0.5-1, lauric monoglyceride 1-2, stearic acid 3-5, amine hydroxybenzene 1-2, tributyl acetylcitrate 10-15, propylparaben 0.01-0.02, polypropylene 10-15.

2. the preparation method of a kind of antibacterial and mouldproof biodegradable plastic according to claim 1, is characterized in that, comprise the following steps:

(1) after being mixed with potato haulm by medical stone powder, 100-150 DEG C processes 3-6h, adds potato starch and Cortex Cinnamomi powder after cooling, and co-ground is even, crosses 300-400 mesh sieve, obtains mixed powder;

(2) mixed powder obtained in (1) is added in dehydrated alcohol by solid-liquid weight ratio 1:3-1:4, first ultrasonic disperse 10-15min, add Weibull, boric acid, lauric monoglyceride, stearic acid and propylparaben again, reflux process 3-5h, the desolventizing of cooling final vacuum extrct, obtains mixture;

(3) first by the mixture that obtains in (2) and tributyl acetylcitrate common high-speed mixing 10-20min under 80-100 DEG C of condition, then add amine hydroxybenzene and polypropylene high-speed mixing 15-30min under 120-140 DEG C of condition, obtain mixed resin;

(4) mixed resin obtained in (3) is added twin screw extruder, control temperature is extruded in 150-180 DEG C, after cooling granulation and get final product.