Cassava starch waste paper pulp composite foam material and preparation method thereof

A tapioca starch and composite foaming technology is applied in the field of environmental protection buffer packaging materials to achieve the effects of accelerating flow speed, increasing strength and promoting starch cross-linking

Inactive Publication Date: 2016-08-24
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the existing thermoplastic starch fully biodegradable foaming materials, to provide a plant fiber reinforced starch composite foaming material and its preparation method, in order to realize the water resistance and improve the performance of the degradable starch composite foaming material. Its compressive strength can really alleviate the city's "white pollution" caused by plastics

Method used

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  • Cassava starch waste paper pulp composite foam material and preparation method thereof
  • Cassava starch waste paper pulp composite foam material and preparation method thereof
  • Cassava starch waste paper pulp composite foam material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] (1) Treatment of waste paper pulp fibers: soak waste corrugated cardboard boxes in water for 24 hours at room temperature, then crush them, dry them in an oven at 110°C for 36 hours, and pass through a 100-mesh sieve to obtain waste paper pulp fibers;

[0017] (2) Raw materials: 600g of tapioca starch, 250g of waste paper pulp fiber, 150g of composite lubricant (1500 mesh calcium carbonate), 20% of the total amount of glycerin / urea composite plasticizer (90g of glycerol, 30g of urea);

[0018] (3) Soak waste paper pulp fibers in an aqueous solution of sodium hydroxide with a temperature of 30°C and a mass percentage of 5% for 15 minutes, wherein the mass ratio of waste paper pulp fibers to aqueous sodium hydroxide solution is 1:0.5;

[0019] (4) Dry 600g of tapioca starch in an oven at 60°C for 2 hours, and then blend it with the composite plasticizer in (2) above. Good 250g of waste paper pulp fiber, 150g of composite lubricant, at room temperature, blended for 15min; ...

Embodiment 2

[0024] (1) Treatment of waste paper pulp fibers: soak waste corrugated cardboard boxes in water for 48 hours at room temperature, then crush them, dry them in an oven at 100°C for 48 hours, and pass through a 150-mesh sieve to obtain waste paper pulp fibers;

[0025] (2) Raw materials: 750g of tapioca starch, 150g of waste paper pulp fiber, 100g of composite lubricant (1500 mesh calcium carbonate), 40% of the total amount of glycerin / urea composite plasticizer (glycerin 150g, urea 150g);

[0026] (3) Soak waste paper pulp fibers in an aqueous solution of sodium hydroxide with a temperature of 40°C and a mass percentage of 10% for 20 minutes, wherein the mass ratio of waste paper pulp fibers to aqueous sodium hydroxide solution is 1:1;

[0027] (4) Dry 750g of tapioca starch in an oven at 80°C for 3 hours, and then blend it with the composite plasticizer in (2) above. Good 150g waste paper pulp fiber, 100g compound lubricant, blending at room temperature for 20min;

[0028] (5...

Embodiment 3

[0032] (1) Treatment of waste paper pulp fibers: soak waste corrugated cardboard boxes in water for 36 hours at room temperature, dry them in an oven at 105°C for 36 hours, and then pulverize them, pass through a 120-mesh sieve to obtain waste paper pulp fibers;

[0033] (2) Raw materials: 700g of tapioca starch, 200g of waste paper pulp fiber, 100g of composite lubricant (1500 mesh calcium carbonate), 30% of the total amount of glycerin / urea composite plasticizer (glycerin 140g, urea 70g);

[0034] (3) Soak the waste paper pulp fibers in an aqueous solution of sodium hydroxide with a mass percentage of 8% at a temperature of 35°C for 20 minutes, wherein the mass ratio of the waste paper pulp fibers to the aqueous sodium hydroxide solution is 1:1;

[0035] (4) Dry 700g of tapioca starch in an oven at 70°C for 3 hours, and then blend it with the composite plasticizer in (2) above. Treated 200g of waste paper pulp fiber and 100g of composite lubricant were blended for 20min at r...

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Abstract

The invention discloses a cassava starch waste paper pulp composite foam material and a preparation method thereof. After cassava starch, waste paper pulp fiber, lubricant and a compound plasticizer are mixed, the product is obtained by using a screw extruder through melt blending, extrusion and foaming. The melt blending components include, by mass, 60-80 parts of the cassava starch, 10-30 parts of the waste paper pulp fiber, 5-20 parts of the compound lubricant and the compound plasticizer accounting for 20-40% of the total amount of the starch. The cassava starch is modified into thermoplastic starch by adopting the plasticizer glycerin / urea. By adding the waste paper pulp fiber, on the one hand, a certain mechanical strength is provided, improvement of melt strength is promoted, bubbles are stabilized, and accordingly the compression strength of the material is improved; on the other hand, the water resistance of the material can be improved. The product is cheap, good in water resistance and compression strength, completely biodegradable, non-toxic and environmentally friendly.

Description

technical field [0001] The invention relates to an environment-friendly cushioning packaging material, in particular to a cassava starch waste paper pulp composite foaming material and a preparation method thereof. Background technique [0002] At present, a large number of cushioning packaging materials are still mainly non-degradable EPS, EPP, polyurethane and other foam plastics, forming serious urban "white pollution". One of the widely used biodegradable natural high polymer raw materials is starch. Starch is a polysaccharide compound, which is decomposed by microorganisms in the natural environment and finally decomposed into CO 2 and H 2 O, and the source is wide and the price is low. However, there are a large number of hydroxyl groups in the molecular chain of starch and its molecules, which are easy to form hydrogen bonds in the molecular chain and between the molecular chains, so it is difficult to dissolve and melt. Its stability decreases; when pure starch f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L97/02C08L5/14C08K13/02C08K5/09C08K3/26C08K5/053C08K5/21C08J9/12
Inventor 曾广胜
Owner HUNAN UNIV OF TECH
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