CN104892990A - Anti-static full degradable film and preparation method thereof - Google Patents

Abstract

The invention discloses a anti-static full degradable film, characterized by comprising the following raw materials by weight: 2-4 parts of borax, 40-60 parts of corn starch, 5-10 parts of talcum powder, 20-30 parts of polyvinyl alcohol, 15-25 parts of glycerin, 0.3-0.5 part of dodecyl trimethyl ammonium chloride, 0.5-1 part of lauryl imidazoline betaine, 2-4 parts of polyethylene glycol (peg), 1-2 parts of nano zinc oxide, 4-10 parts of ethyl orthosilicate and 3-5 parts of castor oil. The anti-static full degradable film has good anti-static performance, good mechanical properties and resistance to water, and good degradation performance, and is low in price, green, environmentally-friendly, and high in use safety.

Description

A kind of anti-electrostatic whole degrading film and preparation method thereof

Technical field

The present invention relates to thin film materials art, be specifically related to a kind of anti-electrostatic whole degrading film and preparation method thereof.

Background technology

In recent years, the cry of improving the ecological environment grows to even greater heights.China is as a packaging big country, and the usage quantity of plastic packing product is huge, and waste plastic is difficult to degraded, residual formation " white pollution " in the environment, the living environment of the serious threat mankind.Therefore, development environment friendly, nontoxic, free of contamination all biological degradation type film substitutes Traditional Packing film becomes inexorable trend.

PVA is a kind of broad-spectrum high molecular polymer, containing a large amount of hydroxyls in molecule, has powerful magnetism, have good barrier, strong adherence, snappiness, glossiness, smoothness, oil-proofness and organic solvent resistance between its adjacent molecule.PVA is easy to biological degradation, and hypotoxicity is non-stimulated, cheap and easy to get, is the very promising degradable plastics body material of one.But the water tolerance of PVA and mechanical property poor, limit the application of PVA base plastics film.

Summary of the invention

The object of this invention is to provide a kind of anti-electrostatic whole degrading film, good mechanical properties, have good water tolerance, cheap, environmental protection, safety in utilization is good.

The present invention is achieved by the following technical solutions:

A kind of anti-electrostatic whole degrading film, it is obtained by the raw material of following weight parts:

Borax 2-4, W-Gum 40-60, talcum powder 5-10, polyvinyl alcohol 20-30, glycerine 15-25, Dodecyl trimethyl ammonium chloride 0.3-0.5, lauryl imidazolinium betaine 0.5-1, polyoxyethylene glycol 2-4, nano zine oxide 1-2, tetraethoxy 4-10, Viscotrol C 3-5.

A preparation method for anti-electrostatic whole degrading film, it comprises the following steps:

(1) add water by solid-liquid weight ratio 1:1-1:2 after W-Gum, talcum powder and borax being mixed and stir 0.5-1h, filter and drying after extremely neutral for pH regulator, be ground to 600-800 order, obtain mixed powder;

(2) mixed powder obtained in (1) and polyoxyethylene glycol to be added jointly in the mixed solution of ethanol in proper amount/water/ammoniacal liquor and ultrasonic disperse 10-15min, obtain suspension, described ammonia concn is 25-26%, the weight ratio=1:2:5 of ammoniacal liquor, distilled water and ethanol in described ethanol/water/ammonia water mixture;

(3) ethanol/tetraethoxy mixed solution is slowly dripped in the suspension obtained in (2), in 50-60 DEG C of abundant stirring reaction 4-6h, also dry with absolute ethanol washing after filtration, obtain modified powder; Weight ratio=the 1:1 of ethanol and tetraethoxy in described ethanol/tetraethoxy mixed solution;

(4) modified powder obtained in (3) is mixed with polyvinyl alcohol, nano zine oxide, Dodecyl trimethyl ammonium chloride and lauryl imidazolinium betaine, first 800-1000r/min stirs 10-15min, then add Viscotrol C and stir 0.5-1h in 70-80 DEG C, add glycerine 100-120 DEG C again and stir 0.5-1h, finally add twin screw extruder extruding pelletization, obtain film pellet;

(5) the film pellet blowing obtained in (4) is made film, to obtain final product.

Advantage of the present invention is:

Using talcum powder and W-Gum as base-material, by the composite modified base-material of silica sphere to increase the intensity of base-material, introduce polyoxyethylene glycol simultaneously and carry out the interface compatibility that surface modification improves base-material and polyvinyl alcohol, effectively improve the mechanical property of matrix material, and composite by with other compositions, the whole degrading film obtained is made not only to have good intensity, tensile property and water tolerance, there is good antistatic performance simultaneously, degradation property is good, cheap, environmental protection, safe to use.

Embodiment

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

A kind of anti-electrostatic whole degrading film, is prepared from by the component raw material of following weight (kg):

Borax 3, W-Gum 50, talcum powder 8, polyvinyl alcohol 25, glycerine 20, Dodecyl trimethyl ammonium chloride 0.4, lauryl imidazolinium betaine 0.8, nano zine oxide 1.5, polyoxyethylene glycol 3, tetraethoxy 8, Viscotrol C 4.

The preparation method of anti-electrostatic whole degrading film comprises the following steps:

(1) add water by solid-liquid weight ratio 1:1 after W-Gum, talcum powder and borax being mixed and stir 0.5-1h, filter and drying after extremely neutral for pH regulator, be ground to 800 orders, obtain mixed powder;

(2) mixed powder obtained in (1) and polyoxyethylene glycol to be added jointly in the mixed solution of ethanol in proper amount/water/ammoniacal liquor and ultrasonic disperse 15min, obtain suspension, described ammonia concn is 26%, the weight ratio=1:2:5 of ammoniacal liquor, distilled water and ethanol in described ethanol/water/ammonia water mixture;

(3) ethanol/tetraethoxy mixed solution is slowly dripped in the suspension obtained in (2), in 60 DEG C of abundant stirring reaction 4h, also dry with absolute ethanol washing after filtration, obtain modified powder; Weight ratio=the 1:1 of ethanol and tetraethoxy in described ethanol/tetraethoxy mixed solution;

(4) modified powder obtained in (3) is mixed with polyvinyl alcohol, nano zine oxide, Dodecyl trimethyl ammonium chloride and lauryl imidazolinium betaine, first 1000r/min stirs 10min, then add Viscotrol C and stir 0.5h in 80 DEG C, add glycerine 120 DEG C again and stir 0.5h, finally add twin screw extruder extruding pelletization, obtain film pellet;

(5) the film pellet blowing obtained in (4) is made film, to obtain final product.

Above-mentioned obtained film performance test result is as follows:

Tensile strength (MPa): 27.2;

Breaking tenacity (MPa): 36.7;

Wet tenacity (MPa): 21.9;

60d degradation rate: >=30%.

Claims (2)

1. an anti-electrostatic whole degrading film, is characterized in that, it is obtained by the raw material of following weight parts:

Borax 2-4, W-Gum 40-60, talcum powder 5-10, polyvinyl alcohol 20-30, glycerine 15-25, Dodecyl trimethyl ammonium chloride 0.3-0.5, lauryl imidazolinium betaine 0.5-1, polyoxyethylene glycol 2-4, nano zine oxide 1-2, tetraethoxy 4-10, Viscotrol C 3-5.

2. the preparation method of a kind of anti-electrostatic whole degrading film according to claim 1, is characterized in that, comprise the following steps:

(1) add water by solid-liquid weight ratio 1:1-1:2 after W-Gum, talcum powder and borax being mixed and stir 0.5-1h, filter and drying after extremely neutral for pH regulator, be ground to 600-800 order, obtain mixed powder;

(2) mixed powder obtained in (1) and polyoxyethylene glycol to be added jointly in the mixed solution of ethanol in proper amount/water/ammoniacal liquor and ultrasonic disperse 10-15min, obtain suspension, described ammonia concn is 25-26%, the weight ratio=1:2:5 of ammoniacal liquor, distilled water and ethanol in described ethanol/water/ammonia water mixture;

(3) ethanol/tetraethoxy mixed solution is slowly dripped in the suspension obtained in (2), in 50-60 DEG C of abundant stirring reaction 4-6h, also dry with absolute ethanol washing after filtration, obtain modified powder; Weight ratio=the 1:1 of ethanol and tetraethoxy in described ethanol/tetraethoxy mixed solution;

(4) modified powder obtained in (3) is mixed with polyvinyl alcohol, nano zine oxide, Dodecyl trimethyl ammonium chloride and lauryl imidazolinium betaine, first 800-1000r/min stirs 10-15min, then add Viscotrol C and stir 0.5-1h in 70-80 DEG C, add glycerine 100-120 DEG C again and stir 0.5-1h, finally add twin screw extruder extruding pelletization, obtain film pellet;

(5) the film pellet blowing obtained in (4) is made film, to obtain final product.