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Gluten powder / calcium carbonate composite material in situ, and preparation method

A technology of in-situ composite material and gluten powder, which is applied in the field of gluten powder/calcium carbonate in-situ composite material and its preparation, can solve the problems that it is difficult to form protein suspension and ensure the uniform dispersion of nanoparticles, and achieve the goal of inhibiting The effect of reunion

Inactive Publication Date: 2007-12-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, wheat protein contains viscous prolamins and glutenins with huge molecular weight, which form highly viscous micelles once hydrated, making it difficult to form a stable protein suspension even at low concentrations
Therefore, when using the suspension method to prepare gluten nanocomposites, it is difficult to ensure the uniform dispersion of nanoparticles in the composites.

Method used

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  • Gluten powder / calcium carbonate composite material in situ, and preparation method
  • Gluten powder / calcium carbonate composite material in situ, and preparation method
  • Gluten powder / calcium carbonate composite material in situ, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) under stirring condition, in the aqueous solution of 100g gluten content 10wt%, ammonia content 10wt%, calcium chloride content 0.218wt%, dripping 3.1g concentration is the ammonium bicarbonate aqueous solution of 5wt%, after dropwise addition finishes React at 30°C for 3 hours, adjust the pH to 6 with concentrated hydrochloric acid, centrifuge, wash the lower slurry with deionized water and centrifuge, repeat 5 times, dry at 50°C for 5 days, freeze-dry at -50°C for 24 hours, and grind to 100 mesh Sieve to get gluten / calcium carbonate in-situ complex;

[0025] 2) Mix 4.3g of glycerin with the gluten powder / calcium carbonate in-situ compound, place it in the GB / T1040-92 plastic tensile property test standard mold, and use a flat vulcanizer to press at 80°C and 5MPa pressure for 30min, Obtain gluten / calcium carbonate in situ composite material.

Embodiment 2～5

[0027] Calcium chloride content is respectively 0.436wt%, 0.654wt%, 0.872wt%, 1.09% in the gluten ammoniacal solution, and the consumption of 5wt% ammonium bicarbonate aqueous solution is respectively 6.2g, 9.3g, 12.4g, 15.5g, the rest Condition is the same as embodiment 1.

Embodiment 5

[0029] 1) under stirring condition, to 15.6g dripping concentration in the aqueous solution of 100g gluten content 10wt%, ammonia content 10wt%, calcium chloride content 2.18wt% is the ammonium bicarbonate aqueous solution of 10wt%, after dropwise addition finishes React at 60°C for 1h, adjust the pH to 7 with concentrated hydrochloric acid, centrifuge, wash the lower slurry with deionized water and centrifuge, repeat 8 times, dry at 50°C for 5 days, freeze-dry at -50°C for 24h, and grind to 100 mesh Sieve to get gluten / calcium carbonate in-situ complex;

[0030] 2) Mix 0.5 g of glycerin with the gluten / calcium carbonate in-situ composite, and heat-press at 140° C. for 10 min to obtain the gluten / calcium carbonate in-situ composite.

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Abstract

This invention discloses a method for preparing wheat protein powder / calcium carbonate in-situ composite material. The wheat protein powder / calcium carbonate in-situ composite material comprises: wheat protein powder 100 parts, calcium carbonate particles 2-20 parts, and glycerin 5-43 parts. The method comprises: adding tetraethyl orthosilicate into ammonia solution of wheat protein powder, hydrolyzing to obtain calcium carbonate particles, adding glycerin plasticizer, drying, and mold-pressing to obtain wheat protein powder / calcium carbonate in-situ composite material. The wheat protein powder / calcium carbonate in-situ composite material has such advantages as wide wheat protein powder resources, simple preparation method, and no generation of toxic or harmful substances during preparation, and can be widely used in the field of degradable protein plastics and their composite materials.

Description

technical field [0001] The invention relates to a gluten / calcium carbonate in-situ composite material and a preparation method thereof. Background technique [0002] At present, the world's total plastic output exceeds 170 million tons, which has penetrated into various sectors of the national economy and all areas of people's lives. With the increasing shortage of petroleum resources and the increasing environmental pollution caused by synthetic polymer materials, using renewable and degradable plant resources as chemical raw materials to prepare environmentally friendly biodegradable plastics or edible packaging film materials is becoming more and more popular in academia and The industry has been highly valued and has become one of the frontier fields of polymer material science and processing engineering. Wheat storage protein contains 40-50% gliadin and 35-45% glutenin, and has excellent film-forming and plastic processing properties. The industrial product of wheat s...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08K5/053C08K3/26
Inventor 宋义虎郑强
Owner ZHEJIANG UNIV
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