CN113201227A

CN113201227A - Preparation method and application of environment-friendly material taking bagasse as base material

Info

Publication number: CN113201227A
Application number: CN202110426579.8A
Authority: CN
Inventors: 李静薇; 李致鹏
Original assignee: Guangzhou Pengcheng Paper Co ltd
Current assignee: Guangzhou Pengcheng Paper Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-08-03
Anticipated expiration: 2041-04-20
Also published as: CN113201227B

Abstract

The application relates to the field of environment-friendly materials, and particularly discloses a preparation method of an environment-friendly material taking bagasse as a base material. The method comprises the following steps: step 1, preparing materials: mixing bagasse, water, a plant adhesive and a thickening agent, and stirring at the rotating speed of 600-1500rpm for 30-60 minutes to prepare a bonding base material; step 2, molding: putting the bonding base material into a die, and extruding at the temperature of 120-180 ℃ for 10-30s to obtain the environment-friendly material taking the bagasse as the base material; wherein, 35-55 parts of bagasse; 20-40 parts of a plant adhesive; 15-25 parts of water; 20-30 parts of a thickening agent; the fineness of the bagasse is 1000-2200 meshes; the plant adhesive comprises radix Puerariae powder, sweet potato powder, radix Pachyrhizi Erosi powder and Manihot Utilissima powder. The application of environment friendly material with bagasse as base material can be used in making straw, cup, dinner plate, etc. and has the advantages of high biodegradability and high water and heat stability.

Description

Preparation method and application of environment-friendly material taking bagasse as base material

Technical Field

The application relates to the field of environment-friendly tableware, in particular to a preparation method and application of an environment-friendly material taking bagasse as a base material.

Background

In the catering industry, generally used straws, cups, trays and the like are mainly made of petrochemical raw materials into corresponding plastic products, but with the continuous enhancement of environmental awareness of people and the regulation and control of national policies, the national 'opinion on further strengthening plastic pollution control' in the early 2020 years is provided, and the national catering industry forbids the use of non-degradable disposable plastic straws, cups and the like and replaces paper straws, paper cups and the like.

From the actual use experience, the use experience of the paper product is inferior to that of the plastic product, mainly because the paper product is easy to soften and bend after being soaked for a long time and usually becomes soft and sticky without drinking for a long time, and the use of a consumer is influenced.

In view of the above-mentioned related technologies, the applicant considers that the pollution of the disposable plastic products in the existing catering industry is large, and the paper products are relatively environment-friendly, but the poor water resistance leads to poor consumer experience, so that the development of a material which is environment-friendly and has good water resistance is urgently needed to meet the market demand.

Disclosure of Invention

In order to improve the water-resistant strength of disposable catering products on the premise of environmental protection, the application provides a preparation method and application of an environment-friendly material taking bagasse as a base material.

In a first aspect, the application provides a preparation method of an environment-friendly material taking bagasse as a base material, which adopts the following technical scheme:

step 1), preparing materials: mixing bagasse, water, a plant adhesive and a thickening agent, and stirring at the rotating speed of 600-1500rpm for 30-60 minutes to prepare a bonding base material;

step 2), molding: putting the bonding base material into a die, and extruding at the temperature of 120-180 ℃ for 10-30s to obtain the environment-friendly material taking the bagasse as the base material;

the environment-friendly material taking the bagasse as the base material comprises the following components in parts by weight:

35-55 parts of bagasse;

20-40 parts of a plant adhesive;

15-25 parts of water;

20-30 parts of a thickening agent;

the fineness of the bagasse is 100-2200 meshes;

the plant adhesive comprises radix Puerariae powder, sweet potato powder, radix Pachyrhizi Erosi powder and Manihot Utilissima powder.

By adopting the technical scheme, as bagasse is matched with the kudzu root powder, the sweet potato powder and the manioc powder, the kudzu root powder, the sweet potato powder, the manioc powder and the manioc powder contain different types of starch with different viscosity temperatures respectively, during the heating process, glycosidic bonds in the starch are broken, starch fragments with smaller molecular weight are formed by breaking and have viscosity, the bagasse obtains better viscosity in a wider temperature range through the breaking temperatures of different starches, and a complete and continuous waterproof film can be formed after solidification through the matching of the kudzu root powder, the sweet potato powder, the manioc powder and the manioc powder, the width of molecular gaps of the waterproof film is about a few nanometers, although single water molecules can pass through the gaps, water in the natural world is usually in an associated state, a larger group is formed among dozens of water molecules due to the action of hydrogen bonds, the formed waterproof film enables water molecular groups to be difficult to infiltrate into the environment-friendly material through gaps among the waterproof films, so that the environment-friendly material taking bagasse as a base material is good in water resistance, and meanwhile, the used raw materials are good in biodegradability, so that the environment-friendly and water-resistant environment-friendly material is obtained.

Preferably, the extrusion temperature in the step 2) is 130-150 ℃.

By adopting the technical scheme, the temperature during heating and extrusion is 130-150 ℃, so that glycosidic bonds in the plant adhesive are broken into more starch fragments with smaller molecular weights, the viscosity of the plant adhesive is further improved, meanwhile, the gelatinization of the plant adhesive is more uniform at the temperature, the waterproof film formed after the environment-friendly material is cured is more uniform, and the water resistance of the environment-friendly material is further improved.

Preferably, the plant adhesive is prepared from kudzu root powder, sweet potato powder and manioc powder in a ratio of 1: 1-2: 1-2: 1-3 by mass ratio.

Through adopting above-mentioned technical scheme, because root of kudzu vine powder, sweet potato powder and the cooperation of manioc powder with specific proportion for certain distance has between starch granule and the granule, make difficult formation "crystal bridge" in the system and become comparatively dispersed, make bagasse mix with the plant binder and be difficult for forming massive aggregate after with, make bagasse and starch combine more fully, make the compactedness of the waterproof membrane that the environmental protection material that uses bagasse as the base material formed further promote, thereby make the water resistance of environmental protection material further increase.

Preferably, the fineness of the bagasse is 1500-2000 meshes.

By adopting the technical scheme, the bagasse has the fineness of 1500-2000 meshes, is more uniformly distributed in the system and is more uniformly combined with the plant adhesive to form a fine product, so that the performance of the environment-friendly material is improved.

Preferably, 3-7 parts by weight of calcium carbonate is also added in the step 1).

By adopting the technical scheme, the calcium carbonate with a specific proportion is added, on one hand, the distance between starch molecules is increased by calcium carbonate particles, the acting force of a high molecular chain segment is reduced, the free radical chain scission reaction caused by photodegradation is promoted, and the degradation of the environment-friendly material is accelerated, on the other hand, the calcium carbonate is matched with the starch and the bagasse, the calcium carbonate can better promote the dispersibility of the starch in a system, so that the starch and the bagasse of different types are uniformly combined, the bonding property of the starch and the bagasse is better, and the water resistance of the environment-friendly material is improved.

Preferably, the thickening agent is fenugreek gum, artemisia desertorum seed gum and flaxseed gum, wherein the weight ratio of the fenugreek gum to the flaxseed gum is 1: 0.1-1: 0.2-1 mass ratio.

By adopting the technical scheme, the bagasse is bonded by the plant adhesive after matching of different types of starch, and the existing polylactic acid with better thermal stability obtained by fermenting the starch is not blended with the bagasse; the application finds that the tensile strength of the environment-friendly material in hot water is reduced on the contrary by simultaneously adding the fenugreek gum and the artemisia seed gum, but the application finds that the addition of the flaxseed gum with poor thermal stability relieves the mutual inhibition between the fenugreek gum and the artemisia seed gum, so that the tensile strength of the environment-friendly material is greatly improved, and the environment-friendly material has better hydrothermal stability and is not easy to deform.

Preferably, the mass ratio of the fenugreek gum to the artemisia desertorum seed gum to the flaxseed gum is 1: 0.5-0.8: 0.6-0.8.

By adopting the technical scheme, the components and the thickening agent with the mass ratio are specifically selected, so that the tensile strength of the environment-friendly material in media such as hot water is further improved, the hydrothermal stability of the environment-friendly material is further improved, and the environment-friendly material is not easy to deform.

In a second aspect, the application provides an application of an environment-friendly material based on bagasse, which adopts the following technical scheme:

an environment-friendly material taking bagasse as a base material is used for manufacturing straws, dinner plates or water cups.

By adopting the technical scheme, the straw, the dinner plate and the water cup are made of the environment-friendly materials, on one hand, the used raw materials are from plants, the bagasse is changed into valuables, and the straw, the dinner plate and the water cup have better biodegradability, on the other hand, the embarrassing situation that catering appliances meeting the requirements of consumers are monopolized by biodegradability and hydrothermal stability is broken through, more choices are provided for the catering market, and therefore, a strength is provided for creating a benign market competition environment.

In summary, the present application has the following beneficial effects:

1. because the bagasse is matched with the kudzu root powder, the sweet potato powder and the manioc powder, the bagasse obtains better viscosity in a wider temperature range, a complete and continuous waterproof film can be formed after solidification, the environment-friendly material taking the bagasse as a base material has better water resistance, and the environment-friendly material which is environment-friendly and waterproof is obtained.

2. According to the application, the fenugreek gum, the artemisia seed gum and the flaxseed gum are preferably prepared into the thickening agent according to a specific proportion, so that the tensile strength of the environment-friendly material in media such as hot water is improved, the hydrothermal stability of the environment-friendly material is better, and the environment-friendly material is not easy to deform.

3. The application of the utility model, the straw, the dinner plate and the water cup made of the environment-friendly materials are changed into valuables, have better biodegradability, and provide more choices for the catering market, thereby contributing to creating a good market competition environment.

Detailed Description

The present application will be described in further detail with reference to examples.

Examples

Examples 1 to 4

Examples 1-4 disclose straws of environmentally friendly material based on bagasse, prepared from the following components:

bagasse, water, a plant binder and a thickening agent.

Wherein the plant adhesive is a compound of kudzu root powder, sweet potato powder and manioc powder.

The thickener is xanthan gum.

The specific amount of the feed is shown in Table 1 in g.

TABLE 1

The preparation method of the straw made of environment-friendly materials taking bagasse as the base material in the examples 1-3 comprises the following steps:

step 1), preparing materials: adding bagasse with the fineness of 1000 meshes, water, a plant adhesive and a thickening agent into a stirrer, mixing, and stirring at the rotating speed of 600rpm for 30 minutes to prepare a bonding base material;

step 2), molding: placing the bonding base material into a straw mold, and extruding at 120 deg.C for 10s to obtain straw made of environment-friendly material with bagasse as base material

In example 4, a method for preparing a straw made of environment-friendly materials and using bagasse as a base material comprises the following steps:

step 1), preparing materials: adding bagasse with the fineness of 2200 meshes, water, a plant adhesive and a thickening agent into a stirrer, mixing, and stirring at the rotating speed of 1500rpm for 60 minutes to prepare a bonding base material;

step 2), molding: and (3) putting the bonding base material into a straw die, and extruding for 30s at the temperature of 180 ℃ to obtain the straw made of the environment-friendly material taking the bagasse as the base material.

Example 5

This example discloses a straw made of environmental friendly materials based on bagasse.

The difference from example 3 is that: the fineness of the bagasse is 1500 meshes.

Example 6

The difference from example 3 is that: the fineness of the bagasse is 2000 meshes.

Example 7

The difference from example 3 is that: 30g of calcium carbonate were also added in step 1).

Example 8

The difference from example 3 is that: 70g of calcium carbonate were also added in step 1).

Examples 9 to 12

Examples 9-12 disclose a straw made of an environmentally friendly material based on bagasse.

The difference from example 3 is that: the thickening agent consists of fenugreek gum, artemisia desertorum seed gum and flaxseed gum, and the specific adding amount is shown in table 2, unit g.

TABLE 2

	Example 9	Example 10	Example 11	Example 12
					Fenugreek gum	192.3	83.3	119.1	96.2
Artemisia desertorum seed gum	19.2	83.3	59.5	76.9
					Flaxseed gum	38.5	83.3	71.4	76.9

Example 13

The difference from example 12 is that: the extrusion temperature in step 2) was 130 ℃.

Example 14

The difference from example 13 is that: 50g of calcium carbonate is also added in the step 1), the fineness of the bagasse is 1800 meshes, and the extrusion temperature in the step 2) is 150 ℃.

Example 15

The embodiment discloses a water cup made of environment-friendly materials and taking bagasse as a base material.

The difference from example 14 is that: the mould in the step 2) is a water cup mould.

Example 16

This example discloses a dinner plate made of an environmentally friendly material based on bagasse.

The difference from example 14 is that: the mould in the step 2) is a dinner plate mould.

Comparative example

Comparative example 1

Comparative examples 1 to 1

The difference from example 3 is that: equal amount of potato powder is adopted to replace the kudzu root powder.

Comparative examples 1 to 2

The difference from example 3 is that: equal amount of potato powder is used instead of sweet potato powder.

Comparative examples 1 to 3

The difference from example 3 is that: equal amount of potato powder is adopted to replace sweet potato powder.

Comparative examples 1 to 4

The difference from example 3 is that: equal amount of potato powder is adopted to replace the manioc powder.

Comparative example 2

Comparative example 2-1

The difference from example 12 is that: equal amount of xanthan gum is used to replace artemisia desertorum seed gum and flaxseed gum.

Comparative examples 2 to 2

The difference from example 12 is that: equal amount of xanthan gum is used to replace fenugreek gum and flaxseed gum.

Comparative examples 2 to 3

The difference from example 12 is that: equal amount of xanthan gum is used to replace fenugreek gum and artemisia seed gum.

Comparative examples 2 to 4

The difference from example 12 is that: equal amount of xanthan gum is used to replace flaxseed gum.

Comparative examples 2 to 5

The difference from example 12 is that: equal amount of xanthan gum is used to replace artemisia desertorum seed gum.

Comparative examples 2 to 6

The difference from example 12 is that: equal amount of xanthan gum is used to replace fenugreek gum.

Comparative example 3

Commercially available plastic straws.

Performance test

Test 1 biodegradability test

According to GB/T19275-.

TABLE 3

	M0/g	M1/g	Weight loss rate/%)
				Example 1	15.606	10.412	33.3
Example 3	15.413	9.810	36.4
				Example 12	15.731	9.994	36.5
Example 13	15.127	10.045	33.6
				Example 14	15.623	10.165	34.9
Comparative example 3	11.641	11.143	4.3

According to the comparison between the examples in table 3 and the comparative examples, the weight loss ratio of the examples is larger than that of the comparative examples, which shows that the straw made of environment-friendly materials based on bagasse in the examples has better biodegradability, thereby reducing the pressure of environmental protection.

Test 2

Testing Water resistance

Taking 3 straws of the environment-friendly material based on bagasse prepared in examples 1 to 14 and comparative example 1, dry tensile strength Pd and wet tensile strength Pw after soaking in water for 30min were measured according to GB/T465.2-2008 "tensile strength after soaking measurement", the unit of water is normal temperature water, and the result is expressed by the average value of retention rate r1 ═ Pw/Pd × 100%, the higher the retention rate is, the better the water resistance is, and the data are shown in Table 4.

TABLE 4

	Pw/kN	Pd/kN	r1/％
				Example 1	3.23	5.32	60.7
Example 2	3.41	5.61	60.9
				Example 3	3.41	5.52	61.7
Example 4	3.28	5.23	62.6
				Example 5	3.54	5.91	59.9
Example 6	3.51	5.82	60.4
				Example 7	3.54	5.84	60.5
Example 8	3.55	5.93	59.9
				Example 9	3.65	6.14	59.5
Example 10	3.73	6.32	58.9
				Example 11	3.69	6.22	59.4
Example 12	3.63	6.03	60.2
				Example 13	3.80	6.51	58.3
Example 14	3.78	6.42	59.0
				Comparative examples 1 to 1	1.26	4.21	29.9
Comparative examples 1 to 2	1.28	4.15	30.8
				Comparative examples 1 to 3	1.32	4.25	31.1
Comparative examples 1 to 4	1.37	4.04	33.8

According to the comparison of the data of comparative examples 1-1 to 1-4 and example 3 in Table 4, the retention rate of example 3 is much higher than that of comparative examples 1-1 to 1-4, which shows that the environmental protection material has better water resistance only by adding the kudzu root powder, the sweet potato powder and the tapioca powder at the same time, and the water resistance without any component is not very good.

According to the comparison of the data of the examples 1 to 4 in the table 4, the retention rates of the examples 3 and 4 are both greater than those of the examples 1 and 2, which shows that the water resistance of the environment-friendly material is further improved by adding the kudzu root powder, the sweet potato powder and the tapioca powder in a specific ratio, and further shows that the environment-friendly material using bagasse as a base material is not easy to soften and become sticky in water to affect the use experience by adding the kudzu root powder, the sweet potato powder and the tapioca powder at the same time and matching in a specific ratio to have excellent water resistance.

Test 3

Testing hydrothermal stability

Taking 3 straws of the environment-friendly material based on bagasse prepared in examples 1 to 4, 9 to 14 and comparative example 2, dry tensile strength Pd and wet tensile strength Pw after 30min of soaking were measured according to GB/T465.2-2008 "measurement of tensile strength after soaking", water temperature is about 80 ℃ and unit is kN/m, and the results are expressed as an average value of retention r2 ═ Pw/Pd 100%, and are detailed in table 5.

TABLE 5

	Pw	Pd	r2
				Example 1	0.78	5.37	14.5
Example 2	0.83	5.62	14.7
				Example 3	0.85	5.65	15.1
Example 4	0.79	5.43	14.6
				Example 9	1.86	6.12	30.4
Example 10	1.92	6.26	30.7
				Example 11	1.93	6.25	30.8
Example 12	1.89	6.19	30.5
				Example 13	2.02	6.48	31.2
Example 14	2.03	6.50	31.3
				Comparative example 2-1	0.89	5.67	15.7
Comparative examples 2 to 2	0.89	5.48	16.3
				Comparative examples 2 to 3	0.23	5.16	4.39
Comparative examples 2 to 4	0.64	5.07	12.7
				Comparative examples 2 to 5	0.78	5.02	15.6
Comparative examples 2 to 6	0.84	5.12	16.4

According to the comparison of the data of the comparative examples 2-1 and 2-2 and the comparative examples 2-4 in the table 5, the retention rates of the comparative examples 2-4 are all smaller than that of the comparative examples 2-1 and 2-2, which shows that the straw prepared by only adding the fenugreek gum and the artemisia seed gum has an inhibiting effect on the water and heat stability, the comparative examples 2-4 and the data of the examples 9-12 have a greater retention rate than that of the examples 2-4, which shows that the mutual inhibition between the fenugreek gum and the artemisia seed gum is relieved after adding the flaxseed gum, so that the tensile strength of the environment-friendly material is greatly improved, the environment-friendly material has better hydrothermal stability and is not easy to deform, and further shows that the tensile strength of the environment-friendly material taking the bagasse as the base material in hot water can be improved only by simultaneously adding the fenugreek gum, the artemisia seed gum and the flaxseed gum, thereby leading the hydrothermal stability of the product to be better.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. A preparation method of an environment-friendly material taking bagasse as a base material is characterized by comprising the following steps:

35-55 parts of bagasse;

20-40 parts of a plant adhesive;

15-25 parts of water;

20-30 parts of a thickening agent;

the fineness of the sugarcane is 1000-2200 meshes;

2. A process for preparing environment-friendly materials based on bagasse as claimed in claim 1, characterized in that: the plant adhesive is prepared from kudzu root powder, sweet potato powder and manioc powder in a weight ratio of 1: 1-2: 1-2: 1-3 by mass ratio.

3. A process for preparing environment-friendly materials based on bagasse as claimed in claim 1, characterized in that: the fineness of the bagasse is 1500-2000 meshes.

4. A process for preparing environment-friendly materials based on bagasse as claimed in claim 1, characterized in that: 3-7 parts of calcium carbonate by mass is also added in the step 1).

5. A process for preparing environment-friendly materials based on bagasse as claimed in claim 1, characterized in that: the thickening agent is composed of fenugreek gum, artemisia seed gum and flaxseed gum, wherein the weight ratio of the fenugreek gum to the artemisia seed gum is 1: 0.1-1: 0.2-1 mass ratio.

6. A method for preparing environment-friendly materials based on bagasse as claimed in claim 5, characterized in that: the mass ratio of the fenugreek gum to the artemisia desertorum seed gum to the flaxseed gum is 1: 0.5-0.8: 0.6-0.8.

7. A process for preparing environment-friendly materials based on bagasse as claimed in any one of claims 1 to 6, characterized in that: the extrusion temperature in the step 2) is 130-150 ℃.

8. The application of the environment-friendly material taking bagasse as a base material is characterized in that: use of the environment-friendly materials based on bagasse as claimed in any one of claims 1 to 7 for making straws, dinner plates or cups.