CN112898615A - Mesona chinensis polysaccharide/nano TiO2Dolichos starch multifunctional composite film and preparation method thereof - Google Patents
Mesona chinensis polysaccharide/nano TiO2Dolichos starch multifunctional composite film and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/02—Starch; Degradation products thereof, e.g. dextrin
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- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08K5/053—Polyhydroxylic alcohols
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention discloses mesona chinensis benth polysaccharide/nano TiO2A hyacinth bean starch multifunctional composite membrane and a preparation method thereof belong to the technical field of biodegradable film materials. The composite film comprises the following raw materials: 200-250 parts of hyacinth bean starch, 60-75 parts of glycerol, 2-3 parts of Chinese mesona herb polysaccharide and nano TiO24-5 parts and 2000 parts of deionized water. The preparation method comprises the following steps: compounding hyacinth bean starch, glycerol, mesona chinensis benth polysaccharide and a proper amount of deionized waterThen heating in water bath for gelatinization, and ultrasonically dispersing the gelatinized glue solution and nano TiO in advance in deionized water2Uniformly mixing, then ultrasonically treating for 30 minutes to remove bubbles, pouring the film-forming solution into a Teflon mold, then putting the Teflon mold into an oven for drying, and removing the Teflon mold after film forming to obtain the composite film. The invention solves the problems of poor mechanical property, poor thermal stability, poor ultraviolet resistance and the like of a pure starch film, and the preparation method of the composite film is simple, the mechanical property of the composite film is good, the composite film is degradable, and the composite film has the characteristics of good thermal stability, antibiosis, good hydrophobicity and ultraviolet resistance.
Description
Technical Field
The invention belongs to the technical field of biodegradable composite materials, and particularly relates to mesona blume polysaccharide/nano TiO2A hyacinth bean starch multifunctional composite membrane and a preparation method thereof.
Background
For years, plastic materials taking petroleum hydrocarbon as a base material, particularly plastic food packaging bags bring great convenience to people, but white pollution caused by the environment-unfriendliness and the non-biodegradability greatly puzzles people, and the plastic materials do not accord with the current era theme of environmental protection and sustainable development. Starch is a natural renewable resource widely distributed in nature, and has the characteristics of low price, rich content, wide distribution, good film forming property, biodegradability and the like, so that the starch is concerned and researched by a plurality of scholars. However, the pure starch film has the defects of poor mechanical property, easy water absorption, poor thermal stability, single function and the like, and the application of the starch film in the field of food packaging is limited.
The mesona blume polysaccharide is extracted from the mesona blume which is widely distributed in China and used as both medicine and food, has the functions of resisting oxidation, relieving summer heat, clearing heat, cooling blood and detoxifying, and is used for treating diseases such as heatstroke, diabetes, hypertension and the like. The mesona blume polysaccharide is low in price, easy to obtain and excellent in biological activity, and is not found to be applied to starch film products at present.
With the global development of economy, the circulation speed and the circulation range of food are continuously expanded, the requirements of the market on food packaging are continuously improved, and on the other hand, the problem of environmental pollution which puzzles the world mankind is also considered, so that the food packaging field lacks of packaging materials which can be biodegraded, are convenient to prepare and have strong packaging functions.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the technical and market problems and provide a mesona blume polysaccharide/nano TiO2A hyacinth bean starch multifunctional composite membrane and a preparation method thereof.
The application takes hyacinth bean starch with good film forming property as a base material, and mesona chinensis benth polysaccharide, glycerin and nano TiO with high biological activity are added2The multifunctional composite film is prepared by compounding, so that the mechanical, thermal stability, antibacterial, good hydrophobicity, ultraviolet resistance and other properties of the composite film are enhanced, and the composite film can meet the requirements of common food packaging and can also meet the requirements of some special food packaging.
The purpose of the invention is realized by the following technical scheme:
mesona chinensis polysaccharide/nano TiO2The membrane material comprises the following components in parts by weight: 200-250 parts of hyacinth bean starch, 60-75 parts of glycerol, 2-3 parts of Chinese mesona herb polysaccharide and nano TiO24-5 parts and 2000 parts of deionized water.
Preparing the mesona blume polysaccharide/nano TiO2A method for preparing a multifunctional composite membrane of lentil starch comprises the following steps:
(1) extracting mesona chinensis benth polysaccharide: weighing fresh mesona chinensis benth, adding 80% ethanol, soaking overnight, filtering, adding 1.2% sodium bicarbonate, and mixing the materials in a liquid-to-liquid ratio of 1: 20, intermittently stirring at 90 ℃ for 3 hours, filtering to obtain supernatant, precipitating with ethanol, centrifuging, removing alcohol by rotary evaporation, adding 2% protease to remove protein, centrifuging to obtain supernatant, dialyzing, repeatedly performing rotary evaporation and concentration, and finally freeze-drying to obtain mesona chinensis benth polysaccharide.
(2) Pasting: weighing hyacinth bean starch, glycerol and mesona chinensis benth polysaccharide according to a proportion, mixing, adding a proper amount of deionized water, stirring uniformly, and placing in a 90 ℃ water bath kettle to heat until the system is fully gelatinized.
(3) Preparing a film forming solution: dispersing the gelatinized glue solution and nano TiO in deionized water by ultrasonic2After being mixed evenly, the mixture is placed in an ultrasonic instrument for 30 minutes to remove bubbles generated by gelatinization and enable nano TiO2Fully dispersed in the system.
(4) Casting to form a film: and (4) uniformly pouring the film forming solution obtained in the step (3) onto a Teflon mold, putting the Teflon mold into a 50 ℃ oven for drying for 5 hours, taking out the mold, and uncovering the composite film.
The advantages and effects are as follows:
compared with the prior art, the invention has the beneficial effects that:
adding glycerol, herba mesonae chinensis polysaccharide and nanometer TiO2The composite film of the invention enhances the mechanical property, and is endowed with good thermal stability, good antibacterial property, good hydrophobicity and ultraviolet resistance of the starch film.
The composite film of the invention can be completely degraded, and belongs to environment-friendly materials.
The method has the advantages of simple operation steps, low production cost, easy industrial large-scale production, good economic effect and wide application prospect.
Drawings
FIG. 1 hydrophobic contact Angle test of the surfaces of the examples and comparative examples
In the figure, a: comparative example 1; b: comparative example 2; c, example 1; d is example 2; example 3
FIG. 2 thermogravimetric testing of the examples and comparative examples
FIG. 3 Spectrum Scan test of examples and comparative examples
Detailed Description
The technical solution of the present invention is described in detail below by examples, but the scope of the present invention is not limited to the examples.
Example 1
(1) Extracting mesona chinensis benth polysaccharide: weighing a certain amount of fresh mesona chinensis benth, adding deionized water (material-liquid ratio is 1: 10) and 1.2% (w/v) sodium bicarbonate, leaching in a constant temperature water bath kettle at 90 ℃ for 1h, cooling, filtering with 400-mesh gauze, removing upper-layer filter residue to obtain brown mesona chinensis benth polysaccharide, and placing in a refrigerator at 4 ℃ for later use.
(2) Pasting: weighing 2g of hyacinth bean starch, 0.6g of glycerol and 0.02g of mesona blume polysaccharide according to the proportion, mixing, adding 40mL of deionized water, stirring uniformly, and placing in a 90 ℃ water bath kettle to heat until the system is fully gelatinized.
(3) Preparing a film forming solution: mixing the gelatinized glue solution with 0.04g of nano TiO dispersed in deionized water2After being mixed evenly, the mixture is placed in an ultrasonic instrument for 30 minutes to remove bubbles generated by gelatinization and enable nano TiO2Fully dispersed in the system.
(4) Casting to form a film: and (4) uniformly pouring the film forming solution obtained in the step (3) onto a Teflon mold, putting the Teflon mold into a 50 ℃ oven for drying for 5 hours, taking out the mold, and uncovering the composite film.
Example 2
(1) Extracting mesona chinensis benth polysaccharide: weighing a certain amount of fresh mesona chinensis benth, adding deionized water (material-liquid ratio is 1: 10) and 1.2% (w/v) sodium bicarbonate, leaching in a constant temperature water bath kettle at 90 ℃ for 1h, cooling, filtering with 400-mesh gauze, removing upper-layer filter residue to obtain brown mesona chinensis benth polysaccharide, and placing in a refrigerator at 4 ℃ for later use.
(2) Pasting: weighing 2g of hyacinth bean starch, 0.6g of glycerol and 0.04g of mesona blume polysaccharide according to the proportion, mixing, adding 40mL of deionized water, stirring uniformly, and placing in a 90 ℃ water bath kettle to heat until the system is fully gelatinized.
(3) Preparing a film forming solution: mixing the gelatinized glue solution with 0.04g of nano TiO dispersed in deionized water2After being mixed evenly, the mixture is placed in an ultrasonic instrument for 30 minutes to remove bubbles generated by gelatinization and enable nano TiO2Fully dispersed in the system.
(4) Casting to form a film: and (4) uniformly pouring the film forming solution obtained in the step (3) onto a Teflon mold, putting the Teflon mold into a 50 ℃ oven for drying for 5 hours, taking out the mold, and uncovering the composite film.
Example 2 increased the concentration of mesona blume polysaccharide by one time compared to example 1.
Example 3
(1) Extracting mesona chinensis benth polysaccharide: weighing a certain amount of fresh mesona chinensis benth, adding deionized water (material-liquid ratio is 1: 10) and 1.2% (w/v) sodium bicarbonate, leaching in a constant temperature water bath kettle at 90 ℃ for 1h, cooling, filtering with 400-mesh gauze, removing upper-layer filter residue to obtain brown mesona chinensis benth polysaccharide, and placing in a refrigerator at 4 ℃ for later use.
(2) Pasting: weighing 2g of hyacinth bean starch, 0.6g of glycerol and 0.08g of mesona blume polysaccharide according to the proportion, mixing, adding 40mL of deionized water, stirring uniformly, and heating in a 90 ℃ water bath kettle until the system is fully gelatinized.
(3) Preparing a film forming solution: mixing the gelatinized glue solution with 0.04g of nano TiO dispersed in deionized water2After being mixed evenly, the mixture is placed in an ultrasonic instrument for 30 minutes to remove bubbles generated by gelatinization and enable nano TiO2Fully dispersed in the system.
(4) Casting to form a film: and (4) uniformly pouring the film forming solution obtained in the step (3) onto a Teflon mold, putting the Teflon mold into a 50 ℃ oven for drying for 5 hours, taking out the mold, and uncovering the composite film.
Example 3 increased the concentration of mesona blume polysaccharide by one time compared to example 2.
Comparative example 1
(1) Extracting mesona chinensis benth polysaccharide: weighing a certain amount of fresh mesona chinensis benth, adding deionized water (material-liquid ratio is 1: 10) and 1.2% (w/v) sodium bicarbonate, leaching in a constant temperature water bath kettle at 90 ℃ for 1h, cooling, filtering with 400-mesh gauze, removing upper-layer filter residue to obtain brown mesona chinensis benth polysaccharide, and placing in a refrigerator at 4 ℃ for later use.
(2) Pasting: weighing 2g of hyacinth bean starch and 0.6g of glycerol according to the proportion, mixing, adding 40mL of deionized water, stirring uniformly, and placing in a 90 ℃ water bath kettle to heat until the system is fully gelatinized.
(3) Preparing a film forming solution: and (3) placing the gelatinized glue solution into an ultrasonic instrument for ultrasonic treatment for 30 minutes to remove bubbles generated by gelatinization.
(4) Casting to form a film: and (4) uniformly pouring the film forming solution obtained in the step (3) onto a Teflon mold, putting the Teflon mold into a 50 ℃ oven for drying for 5 hours, taking out the mold, and uncovering the composite film.
In comparison with example 1, comparative example 1 did not add Mesona chinensis polysaccharide and nano TiO2。
Comparative example 2
(1) Extracting mesona chinensis benth polysaccharide: weighing a certain amount of fresh mesona chinensis benth, adding deionized water (material-liquid ratio is 1: 10) and 1.2% (w/v) sodium bicarbonate, leaching in a constant temperature water bath kettle at 90 ℃ for 1h, cooling, filtering with 400-mesh gauze, removing upper-layer filter residue to obtain brown mesona chinensis benth polysaccharide, and placing in a refrigerator at 4 ℃ for later use.
(2) Pasting: weighing 2g of hyacinth bean starch and 0.6g of glycerol according to the proportion, mixing, adding 40mL of deionized water, stirring uniformly, and placing in a 90 ℃ water bath kettle to heat until the system is fully gelatinized.
(3) Preparing a film forming solution: mixing the gelatinized glue solution with 0.04g of nano TiO dispersed in deionized water2After being mixed evenly, the mixture is placed in an ultrasonic instrument for 30 minutes to remove bubbles generated by gelatinization and enable nano TiO2Fully dispersed in the system.
(4) Casting to form a film: and (4) uniformly pouring the film forming solution obtained in the step (3) onto a Teflon mold, putting the Teflon mold into a 50 ℃ oven for drying for 5 hours, taking out the mold, and uncovering the composite film.
In comparison with example 1, comparative example 2 did not add mesona chinensis benth polysaccharide.
TABLE 1 tensile Strength and elongation testing of examples and comparative examples
Generally, the increase of the tensile rate is accompanied by the decrease of the tensile strength, and it can be seen from table 1 that the tensile strength of the comparative example and the example is slightly decreased and has no significant difference (p >0.05), which indicates that the addition of mesona chinensis benth polysaccharide and nano titanium dioxide in the present invention does not significantly affect the tensile strength of the starch film. The stretching ratio is obviously improved along with the addition of the nano titanium dioxide and the mesona chinensis benth polysaccharide. This result demonstrates that the starch film produced by the present invention significantly increases its elongation without significantly reducing its tensile strength, which would facilitate its use in food packaging.
The foregoing merely represents preferred embodiments of the invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (2)
1. Mesona chinensis polysaccharide/nano TiO2The multifunctional hyacinth bean starch composite film is characterized by comprising the following raw materials: according to the mass ratio, 200-250 parts of hyacinth bean starch, 60-75 parts of glycerol, 2-3 parts of mesona chinensis benth polysaccharide and nano TiO24-5 parts and 2000 parts of deionized water.
2. The mesona chinensis benth polysaccharide/nano TiO of claim 12The preparation method of the hyacinth bean starch multifunctional composite membrane is characterized by comprising the following steps:
(1) extracting mesona chinensis benth polysaccharide: weighing fresh mesona chinensis benth, adding 80% ethanol, soaking overnight, filtering, adding 1.2% sodium bicarbonate with a material-liquid ratio of 1: 20, intermittently stirring at 90 ℃ for 3 hours, filtering to obtain a supernatant, carrying out alcohol precipitation, centrifuging, removing alcohol by rotary evaporation, adding 2% protease for deproteinization, centrifuging to obtain a supernatant, carrying out dialysis, carrying out repeated rotary evaporation and concentration, and finally carrying out freeze drying to obtain mesona chinensis benth polysaccharide;
(2) pasting: weighing hyacinth bean starch, glycerol and mesona chinensis benth polysaccharide according to a proportion, mixing, adding a proper amount of deionized water, stirring uniformly, and heating in a 90 ℃ water bath kettle until the system is fully gelatinized;
(3) preparing a film forming solution: dispersing the gelatinized glue solution and nano TiO in deionized water by ultrasonic2After being mixed evenly, the mixture is placed in an ultrasonic instrument for 30 minutes to remove bubbles generated by gelatinization and enable nano TiO2Fully dispersing in the system;
(4) casting to form a film: and (4) uniformly pouring the film forming solution obtained in the step (3) onto a Teflon mold, putting the Teflon mold into a 50 ℃ oven for drying for 5 hours, taking out the mold, and uncovering the composite film.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113603939A (en) * | 2021-08-13 | 2021-11-05 | 赵焰 | Starch-based degradable packaging material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102349571A (en) * | 2011-09-14 | 2012-02-15 | 罗来康 | Fruit and vegetable preservative, fruit and vegetable preservative paper and preparation method thereof |
| CN102702578A (en) * | 2012-05-28 | 2012-10-03 | 上海应用技术学院 | Edible grass jelly glue-mandioc preservative film and preparation method thereof |
| CN109749108A (en) * | 2019-02-28 | 2019-05-14 | 华南理工大学 | A kind of edible tapioca composite package film and its preparation method and application |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102349571A (en) * | 2011-09-14 | 2012-02-15 | 罗来康 | Fruit and vegetable preservative, fruit and vegetable preservative paper and preparation method thereof |
| CN102702578A (en) * | 2012-05-28 | 2012-10-03 | 上海应用技术学院 | Edible grass jelly glue-mandioc preservative film and preparation method thereof |
| CN109749108A (en) * | 2019-02-28 | 2019-05-14 | 华南理工大学 | A kind of edible tapioca composite package film and its preparation method and application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113603939A (en) * | 2021-08-13 | 2021-11-05 | 赵焰 | Starch-based degradable packaging material |
| CN113603939B (en) * | 2021-08-13 | 2022-12-27 | 赵焰 | Starch-based degradable packaging material |
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