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Mesona herb polysaccharide/nano TiO2/hyacinth bean starch multifunctional composite film and preparation method thereof

A technology of jelly grass and composite film, which is applied in the direction of sustainable manufacturing/processing, flexible coverings, biological packaging, etc., can solve problems such as shortage, environmental pollution, and no application of starch film products found, and achieve low production cost, Good hydrophobicity and good economic effect

Pending Publication Date: 2021-06-04
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Jelly jelly polysaccharide is cheap, easy to obtain, and has superior biological activity, so far it has not been found to be used in starch film products
[0004] With the globalization of the economy, the speed and scope of food circulation are also expanding, and the market's requirements for food packaging are constantly increasing. A packaging material that is biodegradable, convenient to prepare, and highly functional

Method used

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  • Mesona herb polysaccharide/nano TiO2/hyacinth bean starch multifunctional composite film and preparation method thereof
  • Mesona herb polysaccharide/nano TiO2/hyacinth bean starch multifunctional composite film and preparation method thereof
  • Mesona herb polysaccharide/nano TiO2/hyacinth bean starch multifunctional composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Extraction of Cold Grass Polysaccharide: Weigh quantitative fresh and cold powder, add deionized water (from 1:10) and 1.2% (w / v) sodium hydrogencarbonate, at 90 ° C in a constant temperature water bath Break 1 h, after cooling, filter with 400 mesh gauze, remove the upper filter residue, to obtain brown sewer polysaccharide, place it at 4 ° C refrigerator spare.

[0026] (2) Pastening: 2g 淀 淀, 0.6 g of glycerin and 0.02 g of condolences and mix, mixed with 40 ml of deionized water, and heated to observe the system adequate gelation of 90 ° C water bath.

[0027] (3) Formation liquid prepared: 0.04 g of nano Tio dispersed from deionized water after gelatinization 2 After mixing is uniform, the bubbles generated by ultrasound 30 minutes to remove genia and make nano TiO 2 It is fully dispersed in the system.

[0028] (4) Water cast film: Evenly pour the film-forming liquid in step (3) on the Teflon mold, add 50 ° C oven for 5 hours, take out the mold, and uncover the c...

Embodiment 2

[0030] (1) Extraction of Cold Grass Polysaccharide: Weigh quantitative fresh and cold powder, add deionized water (from 1:10) and 1.2% (w / v) sodium hydrogencarbonate, at 90 ° C in a constant temperature water bath Break 1 h, after cooling, filter with 400 mesh gauze, remove the upper filter residue, to obtain brown sewer polysaccharide, place it at 4 ° C refrigerator spare.

[0031] (2) Pastening: 2g 淀, 0.6 g of glycerol and 0.04 g of condolences and mix, mixing with 40 ml of deionized water and mixed with 40 ml of water bath and heating to observe the full gelation of the system.

[0032] (3) Formation liquid prepared: 0.04 g of nano Tio dispersed from deionized water after gelatinization 2 After mixing is uniform, the bubbles generated by ultrasound 30 minutes to remove genia and make nano TiO 2 It is fully dispersed in the system.

[0033] (4) Water cast film: Evenly pour the film-forming liquid in step (3) on the Teflon mold, add 50 ° C oven for 5 hours, take out the mold, a...

Embodiment 3

[0036] (1) Extraction of Cold Grass Polysaccharide: Weigh quantitative fresh and cold powder, add deionized water (from 1:10) and 1.2% (w / v) sodium hydrogencarbonate, at 90 ° C in a constant temperature water bath Break 1 h, after cooling, filter with 400 mesh gauze, remove the upper filter residue, to obtain brown sewer polysaccharide, place it at 4 ° C refrigerator spare.

[0037] (2) Pastening: 2g of 2 g of lentil starch, 0.6 g of glycerol and 0.08 g of condolences and polysaccharides were mixed, and 40 ml of deionized water was mixed, and heated at a 90 ° C water bath and heated to observe the system full gelation.

[0038] (3) Formation liquid prepared: 0.04 g of nano Tio dispersed from deionized water after gelatinization 2 After mixing is uniform, the bubbles generated by ultrasound 30 minutes to remove genia and make nano TiO 2 It is fully dispersed in the system.

[0039] (4) Water cast film: Evenly pour the film-forming liquid in step (3) on the Teflon mold, add 50 ° C...

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Abstract

The invention discloses a mesona chinensis polysaccharide / nano TiO2 / hyacinth bean starch multifunctional composite film and a preparation method thereof, and belongs to the technical field of biodegradable film materials. The composite film is prepared from the following raw materials: 200 to 250 parts of hyacinth bean starch, 60 to 75 parts of glycerol, 2 to 3 parts of mesona chinensis polysaccharide, 4 to 5 parts of nano TiO2 and 2000 to 5000 parts of deionized water. The preparation method comprises the following steps: compounding hyacinth bean starch, glycerin, mesona chinensis benth polysaccharide and a proper amount of deionized water, carrying out water bath heating gelatinization in a water bath kettle, uniformly mixing the gelatinized glue solution with nano TiO2 which is ultrasonically dispersed in the deionized water in advance, carrying out ultrasonic treatment for 30 minutes to remove bubbles, pouring a film-forming solution into a Teflon mold, performing drying in a drying oven, and after the film is formed, performing uncovering from the mold to obtain the composite film. The problems of poor mechanical property, poor thermal stability, poor ultraviolet resistance and the like of a pure starch film are solved, the preparation method of the composite film is simple, and the composite film is good in mechanical property and degradable and has the characteristics of being good in thermal stability, antibacterial, good in hydrophobicity and ultraviolet-proof.

Description

Technical field [0001] The present invention belongs to the technical field of biodegradable composites, and in particular, the present invention relates to a sewer polysaccharide / nanometer TiO. 2 / Lentil starch multifunctional composite film and preparation method thereof. Background technique [0002] Over the years, it has brought a lot of convenience, especially the plastic food packaging bag, but due to the unfrigepticity of its environment, not biodegradable, the resulting white pollution is also very large. People who have plagued people do not meet the current theme of the current environmental, sustainable development. Starch is a natural and widely distributed renewable resource of nature, which has the characteristics of low price, rich in content, wide distribution, good film formability and biodegradation, so he has received attention and research on many scholars. However, simple starch membranes are poor mechanical properties, easy to absorb water, thermal stabi...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L3/02C08L5/00C08K5/053C08K3/22B65D65/46
CPCB65D65/466C08J5/18C08J2303/02C08J2405/00C08K5/053C08K2003/2241C08K2201/011Y02W90/10
Inventor 谢建华荣利远申明月余强陈奕
Owner NANCHANG UNIV
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