CN104893002A - Feather-meal-base full-degradable plastic film and preparation method thereof - Google Patents

Abstract

The invention discloses a feather-meal-base full-degradable plastic film. The invention is characterized in that the plastic film is prepared from the following raw materials in parts by weight: 30-40 parts of cassava starch, 20-30 parts of feather meal, 10-20 parts of polyvinyl alcohol, 10-20 parts of glycerol, 1-2 parts of silane coupling agent KH-550, 1-2 parts of carboxymethyl chitosan, 1-2 parts of polyvinylpyrrolidone, 5-10 parts of maleic anhydride, 1-2 parts of octoic acid/capric acid triglyceride and 2-4 parts of spermaceti stearyl alcohol. The full-degradable plastic film has the advantages of favorable uniformity, high tensile property, high strength, high flexibility, favorable water resistance, certain mold resistance, wide raw material sources, low price, environment friendliness, high degradability and high practicality.

Description

A kind of feather meal based fully degradable plastics film and preparation method thereof

Technical field

The present invention relates to wrapping material field, be specifically related to a kind of feather meal based fully degradable plastics film and preparation method thereof.

Background technology

Plastics are widely used in the every field of economy, life, as shopping bag, refuse bag, plastic cup, disposable lunch-box in life, and the plastic sheeting for farm use etc. in production.But due to plastics be difficult to degraded, be the source of " white pollution ", cause very important negative impact to physical environment.Along with the raising of the serious and environmental protection consciousness polluted, the biodegradable plastic of product has been subjected to and has paid close attention to widely as an alternative, becomes one of effective ways solving the problem of environmental pollution that plastic refuse causes.

PVA is the polyhydroxylated polymer obtained by Vinyl Acetate Copolymer Ester hydrolysis, have in wet environment under bacterium existent condition and can decompose completely in 6 months, therefore PVA degradative plastics system has characteristic that can be degradable, is real environmental protection completely degradable plastic.But PVA material and base-material consistency poor, be separated serious, this characteristic causes PVA plastics to be difficult to processing, and Mechanical Properties of Products is also poor.Therefore, need the consistency improving PVA and base-material, improve processing characteristics and the mechanical property of PVA plastics, thus improve the quality of products.

Summary of the invention

The object of this invention is to provide a kind of feather meal based fully degradable plastics film, processing characteristics and good mechanical properties, be easy to degraded, environmental protection.

The present invention is achieved by the following technical solutions:

A kind of feather meal based fully degradable plastics film, it is obtained by the raw material of following weight parts:

Tapioca (flour) 30-40, feather meal 20-30, polyvinyl alcohol 10-20, glycerine 10-20, silane resin acceptor kh-550 1-2, cm-chitosan 1-2, polyvinylpyrrolidone 1-2, maleic anhydride 5-10, caprylic/capric triglyceride 1-2, cetostearyl alcohol 2-4.

A preparation method for feather meal based fully degradable plastics film, it comprises the following steps:

(1) mixed with the acetum of cm-chitosan by solid-liquid weight ratio 1:30-1:40 and 4-8% by polyvinylpyrrolidone, 40-60 DEG C is stirred 0.5-1h, obtains mixed solution;

(2) add in the mixed solution in (1) by tapioca (flour) and feather meal, 60-80 DEG C is stirred 2-4h, obtains mixed slurry;

(3) mixed slurry in (2) is added reactor, with 5%NaOH solution by pH regulator to 8.5-9.0, then add maleic anhydride at 80-90 DEG C, keep pH stirring reaction 4-8h between 8.5-9.0, then pH be adjusted to neutrality and filter, obtaining modified base material;

(4) first 800-1200r/min after glycerine and silane resin acceptor kh-550 mixing is stirred 10-20min, then add polyvinyl alcohol 100-120 DEG C and stir 15-30min, finally add the modified base material in (3) and caprylic/capric triglyceride, cetostearyl alcohol high-speed mixing 10-20min, add extruding pelletization under twin screw extruder 120-140 DEG C condition, obtain film pellet;

(5) the film pellet in (4) is formed plastic film by inflation film manufacturing machine blowing, finally get product after cutting, bundling, packaging.

Advantage of the present invention is:

In tapioca (flour), add feather meal and cm-chitosan carry out modification and form base-material, and improved the interface compatibility of base-material and polyvinyl alcohol by maleic anhydride modified base-material, silane coupler modified polyvinyl alcohol, thus improve processing characteristics and the mechanical property of matrix material; And composite in conjunction with raw materials such as cetostearyl alcohols, make the film uniformity that obtains good, tensile property is high, intensity is large, snappiness is strong, and water tolerance is better, have certain anti-microbial property, raw material sources are extensive simultaneously, cheap, environmental protection, degradation property is good, practical.

Embodiment

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

A kind of feather meal based fully degradable plastics film, is prepared from by the component raw material of following weight (kg):

Tapioca (flour) 35, feather meal 25, polyvinyl alcohol 15, glycerine 15, silane resin acceptor kh-550 1.5, cm-chitosan 1.5, polyvinylpyrrolidone 1.5, maleic anhydride 8, caprylic/capric triglyceride 1.5, cetostearyl alcohol 3.

The preparation method of feather meal based fully degradable plastics film comprises the following steps:

(1) by polyvinylpyrrolidone and cm-chitosan by solid-liquid weight ratio 1:40 with 8% acetum mix, 60 DEG C are stirred 0.5h, obtain mixed solution;

(2) add in the mixed solution in (1) by tapioca (flour) and feather meal, 80 DEG C are stirred 4h, obtain mixed slurry;

(3) mixed slurry in (2) is added reactor, with 5%NaOH solution by pH regulator to 8.5-9.0, then add maleic anhydride at 80 DEG C, keep pH stirring reaction 6h between 8.5-9.0, then pH be adjusted to neutrality and filter, obtaining modified base material;

(4) first 1200r/min after glycerine and silane resin acceptor kh-550 mixing is stirred 10min, then add polyvinyl alcohol 100 DEG C and stir 15min, finally add the modified base material in (3) and caprylic/capric triglyceride, cetostearyl alcohol high-speed mixing 10min, add extruding pelletization under twin screw extruder 120-140 DEG C condition, obtain film pellet;

(5) the film pellet in (4) is formed plastic film by inflation film manufacturing machine blowing, finally get product after cutting, bundling, packaging.

Carry out performance test to above-mentioned obtained Based Full-degradable Plastics Film, test result is as follows:

Tensile strength (MPa): 53.8;

Elongation at break: 42.8%;

Water-intake rate: 25.9%;

100d degradation rate: 28.4%.

Claims (2)

1. a feather meal based fully degradable plastics film, is characterized in that, it is obtained by the raw material of following weight parts:

Tapioca (flour) 30-40, feather meal 20-30, polyvinyl alcohol 10-20, glycerine 10-20, silane resin acceptor kh-550 1-2, cm-chitosan 1-2, polyvinylpyrrolidone 1-2, maleic anhydride 5-10, caprylic/capric triglyceride 1-2, cetostearyl alcohol 2-4.

2. the preparation method of a kind of feather meal based fully degradable plastics film according to claim 1, is characterized in that, comprise the following steps:

(1) mixed with the acetum of cm-chitosan by solid-liquid weight ratio 1:30-1:40 and 4-8% by polyvinylpyrrolidone, 40-60 DEG C is stirred 0.5-1h, obtains mixed solution;

(2) add in the mixed solution in (1) by tapioca (flour) and feather meal, 60-80 DEG C is stirred 2-4h, obtains mixed slurry;

(3) mixed slurry in (2) is added reactor, with 5%NaOH solution by pH regulator to 8.5-9.0, then add maleic anhydride at 80-90 DEG C, keep pH stirring reaction 4-8h between 8.5-9.0, then pH be adjusted to neutrality and filter, obtaining modified base material;

(4) first 800-1200r/min after glycerine and silane resin acceptor kh-550 mixing is stirred 10-20min, then add polyvinyl alcohol 100-120 DEG C and stir 15-30min, finally add the modified base material in (3) and caprylic/capric triglyceride, cetostearyl alcohol high-speed mixing 10-20min, add extruding pelletization under twin screw extruder 120-140 DEG C condition, obtain film pellet;

(5) the film pellet in (4) is formed plastic film by inflation film manufacturing machine blowing, finally get product after cutting, bundling, packaging.