Preparation method and application of solid water based on bran and starch waste liquid

Abstract

The application relates to preparation of indoor potted solid water and belongs to the field of solid water preparation. A preparation method is as follows: nitrogen is introduced into a four-necked flask for 10 min to remove air, wheat bran and wheat B starch wastewater are added, heating and stirring are carried out, sodium alginate and gellan gum are added to prepare A liquid; acrylic acid is neutralized by adding 25% NaOH solution under the condition of an ice water bath, after the neutralized liquid is cooled to room temperature, 2-acrylamide-2-methylpropanesulfonic acid, bentonite, methylene bisacrylamide and potassium persulfate are added to prepare B liquid; B liquid is slowly added into A liquid, heating and stirring are carried out to perform polymerization reaction, after the reaction is completed, filtration is carried out, anhydrous ethanol and distilled water are used for washing, and indoor potted special solid water is obtained. The indoor potted solid water provided by the application can provide convenience for office workers to maintain potted plants, can improve soil permeability and water absorption and water retention capacity, has a long use period, and is prepared by using natural degradable materials and has low cost.

Description

[0001] Preparation method and application of solid water based on bran and starch waste liquid TECHNICAL FIELD

[0002] The present application relates to the field of solid water preparation, in particular to a preparation method and application of solid water special for indoor potted plants. BACKGROUND

[0003] Planting flowers and plants can decorate living space and bring joy and comfort. In the busy work life, planting flowers and plants can also be a way to relax the mind and body, so that the working people can enjoy peace and beauty in their busy life. Therefore, more and more people plant indoor potted plants. Most of the indoor flowers and plants are directly planted in flowerpots and placed in the home. However, as they enter thousands of households, some problems related to indoor potted plants gradually emerge. For example, the limited soil, insufficient ventilation, insufficient water management, sunlight problems and the like, flowers and plants are prone to wither, so indoor planting flowers and plants must pay attention to management and watering. With the rapid development of society, business trips have become a common phenomenon, but the business trip is accompanied by the phenomenon that people's plants are unattended. It is not realistic to ask friends, neighbors or family members to help take care of the plants and regularly water the plants at home. Considering the economic benefits, it is not high to consider purchasing automatic watering equipment such as drip irrigation or timing sprinkler to ensure that the plants get the right amount of water. Finding a practical and economical method to take care of the plants at home has become the demand of many business travelers.

[0004] Solid water, also known as dry water in foreign countries, contains more than 90% water and is an ecological and environmentally friendly product integrating microorganisms and chemical technology. Compared with ordinary water, solid water has the physical characteristics of solid matter. This solid matter has biodegradable properties and no residue after degradation, and does not pollute the soil, and can be used as a long-acting water source for plants. Therefore, it is often compared to a "micro water reservoir" in agriculture and has good effects in promoting the growth and development of plants.

[0005] The solid water on the market is suitable for agriculture and forestry, but not suitable for indoor potted plants with limited soil, and has poor salt tolerance and large monomer residue. We urgently need a non-toxic and harmless green degradable material that is practical and economical and designed for indoor potted plants. The emergence of such solid water will undoubtedly solve a long-standing problem for business travelers, allowing their plants to grow well even without care. Of course, in order to better meet this market demand, we need to develop solid water special for indoor potted plants. At present, there are many literatures reported on the application of new degradable water-absorbing materials and inorganic materials, but how to simply prepare and apply them to potted plants still faces great challenges. SUMMARY

[0006] In order to overcome the prior art, the application provides a preparation method and application of solid water for indoor potted plants, which can be prepared by combining bran, wheat B starch, sodium alginate, gellan gum and other materials to prepare the solid water for indoor potted plants, which is degradable, stable, and has high water retention rate.

[0007] The application provides a preparation method and application of solid water for indoor potted plants.

[0008] S1: nitrogen is introduced into a four-necked flask for 10 min to remove air, then bran and wheat B starch wastewater are added, and heating and stirring are performed at 72-90 DEG C, then the temperature is reduced to 35-55 DEG C, and then sodium alginate and gellan gum are added to prepare A liquid;

[0009] S2: acrylic acid solution is taken and added to 25% NaOH solution under ice bath condition to perform neutralization, the neutralization reaction is an exothermic reaction, so the reaction is performed under ice bath condition, after the neutralization liquid is cooled to room temperature, monomer 2-acrylamide-2-methylpropane sulfonic acid, initiator potassium persulfate, inorganic material bentonite and crosslinking agent methylene bisacrylamide are added and fully stirred to prepare B liquid;

[0010] S3: B liquid is slowly added to A liquid to perform polymerization reaction, A liquid is used as a main reactant, and B liquid is more convenient to add to A liquid;

[0011] S4: stirring is stopped when the reaction system is viscous, and the reaction is continuously performed for 0.5-2 h, then the reaction is finished, filtration is performed, anhydrous ethanol and distilled water are used for washing, and the solid water for indoor potted plants is obtained.

[0012] As a preferred technical scheme of the present application, the content of wheat bran in S1 is 2%-10% of the total weight of solid water raw materials. If the content of wheat bran is too low, it will lead to the shortage of water absorption material and reduce the water absorption effect. If the content of wheat bran is too high, it will act as a filling material, reduce the osmotic pressure of the polymer network and the external solution, cause the relative proportion of hydrophilic groups to decrease, and reduce the water absorption effect. The content of wheat B starch is 2%-5% of the total weight of solid water raw materials. The content of sodium alginate is 1%-7% of the total weight of solid water raw materials. If the content of sodium alginate is too low, the stability of the polymer network structure will decrease, and the water retention performance will decrease. If the content of sodium alginate is too high, the viscosity of the reaction system will be too high, which will limit the movement of reactants and reduce the monomer conversion rate and grafting rate, and the water retention effect will be weakened. The content of gellan gum is 1%-2% of the total weight of solid water raw materials. Among them, the mass ratio of low-acyl gellan gum and high-acyl gellan gum is 2:1-1:2. If the content of gellan gum is too low, the solid water cannot be solidified and formed, and the slow-release effect of solid water will be reduced. If the content of gellan gum is too high, the three-dimensional network of the polymer will be dense, which will affect the slow-release effect of water. The content of deionized water is 300mL-500mL. The heating and stirring time is 0.5-2h, and the heating temperature is 70℃-90℃. If the heating temperature is too low, the reaction will not be complete. If the heating temperature is too high, the processing operation difficulty and energy consumption will increase, and the internal network structure of wheat bran, sodium alginate, and gellan gum will be damaged.

[0013] As a preferred technical scheme of the present application, 20mL-60mL of acrylic acid is taken in S2 to make the neutralization degree 40%-70%. If the neutralization degree of the reaction system is too low, Na +The concentration is too low, resulting in the osmotic pressure being small, which is not conducive to water absorption, and if the neutralization degree is too high, more carboxylate is neutralized, the reaction will weaken the electrostatic repulsion, and the water absorption effect will be reduced. The initiator potassium persulfate accounts for 0.05%-1% of the mass of the acrylic monomer, and if the content of potassium persulfate is too low, the number of free radicals will decrease, the monomer grafting rate will decrease, the three-dimensional network structure will be incomplete, and the liquid absorption capacity will be reduced. The mass ratio of 2-acrylamide-2-methylpropanesulfonic acid to acrylic acid is 1:3-2:1, and if the content of 2-acrylamide-2-methylpropanesulfonic acid is too low, the content of the sulfonic acid group as a hydrophilic group will decrease, which will reduce the water absorption performance, and if the content of 2-acrylamide-2-methylpropanesulfonic acid is too high, the number of sulfonic acid groups will increase, the steric hindrance will increase, which is not conducive to the copolymerization of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid monomer, and a poor three-dimensional network internal structure will be formed. The content of the crosslinking agent methylene bisacrylamide accounts for 0.05%-1.0% of the mass of the acrylic monomer, and if the content of the crosslinking agent is too low, the crosslinking points will be few, the three-dimensional space network internal structure formed will be incomplete, the water absorption effect will be affected, and if the content of the crosslinking agent is too high, the crosslinking structure will be too dense, water molecules will be difficult to enter, and the water absorption effect will be poor. The content of bentonite accounts for 2%-5% of the mass of the acrylic monomer, and if the content of bentonite is too low, the synergistic crosslinking effect of bentonite and methylene bisacrylamide cannot be achieved, and if the content of bentonite is too high, the crosslinking degree will increase, and bentonite will also be filled in the polymer network space, which will make it difficult for the three-dimensional network structure to expand, and affect the water absorption effect. The stirring speed is 150-350 rpm, and the stirring temperature is 60-80℃, and if the stirring temperature is too low, the reaction rate will decrease, the reaction will be incomplete, and if the stirring temperature is too high, the reaction will be accelerated, the acrylic acid monomer will be unnecessarily polymerized, the molecular structure of acrylic acid and bentonite will change uncontrollably, the energy consumption will increase, and by controlling the appropriate stirring temperature, the product can form the best water absorption structure, and the expected effect can be achieved.

[0014] As a preferred technical solution of the present application, the stirring speed in S3 is 150-350 rpm, the polymerization reaction is carried out when the temperature is raised to 65-85℃, and the reaction time is 1-4h. If the polymerization temperature is too low, the graft polymerization temperature cannot be reached, the reaction process is prolonged, the grafting chain crosslinking is difficult, and if the polymerization is too high, the reaction rate will increase, the crosslinking degree will be uneven, the three-dimensional network structure will not be dense, the internal structure of the polymer will change, and the water absorption effect will be reduced. If the reaction time is too short, the polymerization reaction will be incomplete, the monomer conversion rate will be low, the product amount will be small, and if the reaction time is too long, more branched chains will be generated in the three-dimensional network structure, the branched chains will be polymerized with each other, the expansion of the internal space of the polymerization network will be limited, and the water absorption capacity will be reduced.

[0015] As a preferred technical solution of the present application, the stirring time of bentonite in S2 is 0.5-1.5h.

[0016] As a preferred technical solution of the present application, the solid water surface obtained in S4 is contacted with the root of the potted plant through a cut "V" shaped opening, and then filled with soil for the potted plant.

[0017] As a preferred technical solution of the present application, the wheat bran is ground into powder, which serves as a natural and environmentally friendly material, mainly playing a role in improving the water absorption ratio and stability of solid water. The organic matter in the wheat bran powder can be decomposed and converted through microbial treatment, and can be used as organic fertilizer. The microorganisms and metabolites enriched therein can promote the reproduction of soil microorganisms, improve soil structure, and improve soil fertility. At the same time, the organic matter in the wheat bran can also provide comprehensive nutritional support for potted plants, promoting the growth and development of plants.

[0018] As a preferred technical solution of the present application, the wheat B starch and sodium alginate, as a natural polysaccharide water-absorbing material, can not only synergize with gellan gum to improve the gel strength and wrap water, but also can improve the water absorption ratio of solid water, so as to fully utilize the wheat processing wastewater resources and marine resources and reduce the production cost and pollution, and has the advantages of non-toxicity, renewability and biodegradability.

[0019] As a preferred technical solution of the present application, the bentonite can improve the gel mechanical strength of the solid water, and improve the reuse frequency and service life of the solid water.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] Wheat bran, wheat B starch is a byproduct of wheat processing, among which the bran can reduce the use of disposable or non-degradable materials as a natural and environmentally friendly material, which is conducive to environmental protection, mainly to improve the water absorption of solid water and stability, and can be treated by microorganisms. The organic matter in the wheat bran powder can be decomposed and converted, which can be used as organic fertilizer. The rich microorganisms and metabolites can promote the reproduction of soil microorganisms, improve soil structure and increase soil fertility. At the same time, the organic matter in the wheat bran can provide comprehensive nutritional support for potted plants, promote the growth and development of plants. The use of sodium alginate can reduce the viscosity of the reaction system, optimize the water absorption material, and reduce the production cost and pollution. Wheat B starch, sodium alginate and wheat bran can improve the water absorption of solid water, and the synergistic effect of gellan gum can improve the gel strength of water. Sodium alginate can fully utilize marine resources and reduce production cost and pollution, and has the advantages of non-toxic, renewable and biodegradable. Bentonite can improve the gel mechanical strength of solid water, improve the reuse frequency and service life of solid water. The materials such as wheat bran, sodium alginate, gellan gum and bentonite are mixed to prepare a special solid water for indoor potted plants, which can reduce the use of organic materials and acrylic monomer in limited soil indoor potted plants, maximize the use of natural degradable materials, reduce environmental pollution, and has good stability and salt resistance compared with the solid water on the market. The use cycle is long, the water retention rate and water absorption rate are high, the preparation raw material price is low, the preparation process is simple, and the prepared solid water can reach more than 92% of water content. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application clearer, the following detailed description of the present application is further described. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application. In order to better understand the technical scheme in the present application for those skilled in the art, the technical scheme in the embodiment of the present application will be clearly and completely described. EMBODIMENT EMBODIMENT 1

[0023] A special solid water preparation method and application for indoor potted plants, characterized in that: the raw materials of the solid water include wheat bran, wheat B starch, sodium alginate, gellan gum, acrylic acid solution, sodium hydroxide solution, bentonite, 2-acrylamide-2-methylpropanesulfonic acid, methylene bisacrylamide and potassium persulfate; comprising the following steps:

[0024] S1: In a four-necked flask, nitrogen was introduced for 10 min to remove air, and wheat bran and wheat B starch wastewater were added. The temperature was heated to 72 DEG C and stirred uniformly. After the temperature dropped to 35 DEG C, it remained unchanged. Then sodium alginate and gelling gum were added to the flask to prepare A liquid. The content of wheat bran was 2%, the content of wheat B starch was 1%, the content of sodium alginate was 1%, and the content of gelling gum was 1%. In the gelling gum, the mass ratio of low acyl gelling gum and high acyl gelling gum was 2:1, and the deionized water was 300 ml. Heating and stirring for 0.5 h;

[0025] S2: The acrylic acid solution was taken in an ice bath and added to 25% NaOH solution for neutralization. After the neutralization liquid was cooled to room temperature, 2-acrylamide-2-methylpropane sulfonic acid, bentonite, methylene bisacrylamide and potassium persulfate were added and stirred uniformly to prepare B liquid. The neutralization degree was 40% by taking 20 mL of acrylic acid. The ratio of acrylamide-2-methylpropane sulfonic acid and acrylic acid was 1:3, the bentonite was 2%, the methylene bisacrylamide was 0.4%, the stirring speed was 150 rpm, and the stirring time was 1 h;

[0026] S3: B liquid was slowly added to A liquid and stirred to carry out polymerization reaction. The stirring speed was 150 rpm, the temperature was raised to 65 DEG C, and the polymerization reaction was carried out for 1 h;

[0027] S4: After the reaction was completed, it was filtered and washed with anhydrous ethanol and distilled water to obtain a solid water for indoor potted plants. The prepared solid water had a water content of about 91.3%. Example 2

[0028] S1: In a four-necked flask, nitrogen was introduced for 10 min to remove air, and wheat bran and wheat B starch wastewater were added. The temperature was heated to 72 DEG C and stirred uniformly. After the temperature dropped to 35 DEG C, it remained unchanged. Then sodium alginate and gelling gum were added to the flask to prepare A liquid. The content of wheat bran was 2%, the content of wheat B starch was 1%, the content of sodium alginate was 1%, and the content of gelling gum was 1%. In the gelling gum, the mass ratio of low acyl gelling gum and high acyl gelling gum was 2:1, and the deionized water was 300 ml. Heating and stirring for 0.5 h;

[0029] S2: The acrylic acid solution was taken in an ice bath and added to 25% NaOH solution for neutralization. After the neutralization liquid was cooled to room temperature, 2-acrylamide-2-methylpropane sulfonic acid, bentonite, methylene bisacrylamide and potassium persulfate were added and stirred uniformly to prepare B liquid. The neutralization degree was 40% by taking 20 mL of acrylic acid. The ratio of acrylamide-2-methylpropane sulfonic acid and acrylic acid was 1:3, the bentonite was 2%, the methylene bisacrylamide was 0.4%, the stirring speed was 150 rpm, and the stirring time was 1 h;

[0030] S3: Slowly add B liquid to A liquid, and conduct polymerization reaction under warming and stirring;

[0031] S4: Stop stirring when the reaction system is viscous, continue to react for 1 h, filter after the reaction is completed, and wash with anhydrous ethanol and distilled water to obtain the solid water dedicated to indoor potted plants. The prepared solid water has a water content of about 94.2%. Example 3

[0032] S1: In a four-necked flask, nitrogen is introduced for 10 min to remove air, bran and wheat B starch wastewater are added, heating is conducted to 90°C, and stirring is conducted until the temperature drops to 55°C, and then the temperature is kept unchanged. Then, sodium alginate and gelling gum are mixed to prepare A liquid. The bran content is 10%, the wheat B starch content is 5%, the sodium alginate content is 7%, the gelling gum content is 2%, the mass ratio of low-acyl gelling gum and high-acyl gelling gum in the gelling gum is 1:2, and the deionized water is 500 ml. Heating and stirring are conducted for 2 h.

[0033] S2: The acrylic acid solution is taken and neutralized in an ice bath with 25% NaOH solution. The neutralization reaction is an exothermic reaction, so it is conducted in an ice bath. After the neutralization liquid is cooled to room temperature, monomer 2-acrylamide-2-methylpropane sulfonic acid, initiator potassium persulfate, inorganic material bentonite, and crosslinking agent methylene bisacrylamide are fully stirred and uniformly prepared into B liquid. The acrylic acid is 60 ml, the neutralization degree is 70%, the potassium persulfate is 1%, the ratio of acrylamide-2-methylpropane sulfonic acid and acrylic acid is 2:1, the bentonite is 5%, the methylene bisacrylamide is 0.4%, the stirring speed is 350 rpm, and the stirring time is 2 h.

[0034] S3: Slowly add B liquid to A liquid, and conduct polymerization reaction under warming and stirring;

[0035] S4: Stop stirring when the reaction system is viscous, continue to react for 1 h, filter after the reaction is completed, and wash with anhydrous ethanol and distilled water to obtain the solid water dedicated to indoor potted plants. The prepared solid water has a water content of about 94.2%. Example 4

[0036] A use method of the solid water dedicated to indoor potted plants, comprising the following steps:

[0037] (1) The prepared solid water is placed in a vacuum drying box at 80°C, and the water content of the solid water is measured.

[0038] (2) The total amount of the solid water is weighed after being placed for 5 days, and the water content of the solid water is recorded.

[0039] The calculation formula of the water content is: water content (%) = (original weight of the solid water - dry weight of the solid water) / original weight of the solid water x 100%. Example 5

[0040] A method for using the solid water for indoor potted plants, comprising the following steps:

[0041] (1) Take the prepared solid water, cut a "V" shape opening in the middle of the surface of the solid water, and place it at the root system of the potted plant to allow the solid water to flow out naturally and slowly, then fill the soil to about 2-3 cm from the top of the flowerpot, and press the soil evenly to maintain the tightness of the soil in the flowerpot.

[0042] (2) After placing, weigh the total amount of solid water every 5 days and record the water loss rate of the solid water.

[0043] The calculation formula of the water loss rate is: water loss rate (%) = (original weight - weight after N days) / original weight × 100%. Example 6

[0044] A method for using the solid water for indoor potted plants, comprising the following steps:

[0045] (1) Take the prepared solid water, cut a "V" shape opening in the middle of the surface of the solid water, and place it at the root system of the potted plant to allow the solid water to flow out naturally and slowly, then fill the soil to about 2-3 cm from the top of the flowerpot, and press the soil evenly to maintain the tightness of the soil in the flowerpot.

[0046] (2) After placing, measure the growth indicators of the potted plants every 5 days and record them. The portable photosynthetic instrument is used to measure the photosynthetic and transpiration rates of the potted plants, the soil moisture meter is used to measure the soil moisture content, and the method of Li Heisheng is used to measure the content of soluble protein, the activities of peroxidase (POD) and superoxide dismutase (SOD), and malondialdehyde (MDA) in the potted plants, and the chlorophyll instrument is used to measure the SPAD value.

[0047] Comparative Example:

[0048] Comparative Example 1:

[0049] S1: In four flasks, nitrogen was introduced for 10 minutes to remove air, wheat bran and wheat B starch wastewater were added, heated to 81°C and stirred uniformly, then the temperature was kept at 45°C after the temperature dropped, then gelatin gum was added to the flask to prepare A liquid; the content of wheat bran was 6%, the content of gelatin gum was 1.5%, the mass ratio of low acyl gelatin gum and high acyl gelatin gum in the gelatin gum was 5:4, and the amount of deionized water was 400 ml. Stirring was carried out for 1.5 h;

[0050] S2: Take the acrylic acid solution in ice bath conditions to add 25% NaOH solution for neutralization, this neutralization reaction is exothermic reaction, therefore in ice bath conditions, the neutralization liquid is cooled to room temperature, then add monomer 2-acrylamide-2-methylpropane sulfonic acid, initiator potassium persulfate, inorganic material bentonite, crosslinking agent methylene bisacrylamide, fully stirred to uniformity to prepare B liquid; wherein take acrylic acid 40 mL to make the neutralization degree 60%, potassium persulfate 0.5%, acrylamide-2-methylpropane sulfonic acid and acrylic acid ratio 1:1, bentonite 4%, methylene bisacrylamide 0.4%, stirring speed 250 rpm, stirring time 1.5 h;

[0051] S3: Slowly add B liquid to A liquid to heat stirring to carry out polymerization reaction;

[0052] S4: When the reaction system is viscous, stop stirring, continue to react for 1 h, filter after the reaction is finished, wash with anhydrous ethanol and distilled water, to obtain the solid water special for indoor potted plants, the prepared solid water has water content about 83.3%.

[0053] Comparative Example 2:

[0054] S1: In a four-necked flask, nitrogen is introduced for 10 min to remove air, then add deionized water, heat to 81℃, keep the temperature unchanged when it drops to 45℃, then add sodium alginate and gellan gum mixture to prepare A liquid; wherein sodium alginate content 4%, gellan gum content 1.5%, wherein the mass ratio of low acyl gellan gum and high acyl gellan gum in gellan gum is 5:4, deionized water 400 ml, heat and stir for 1.5 h;

[0055] S2: Take the acrylic acid solution in ice bath conditions to add 25% NaOH solution for neutralization, this neutralization reaction is exothermic reaction, therefore in ice bath conditions, the neutralization liquid is cooled to room temperature, then add monomer 2-acrylamide-2-methylpropane sulfonic acid, initiator potassium persulfate, inorganic material bentonite, crosslinking agent methylene bisacrylamide, fully stirred to uniformity to prepare B liquid; wherein take acrylic acid 40 mL to make the neutralization degree 60%, potassium persulfate 0.5%, acrylamide-2-methylpropane sulfonic acid and acrylic acid ratio 1:1, bentonite 4%, methylene bisacrylamide 0.4%, stirring speed 250 rpm, stirring time 1.5 h;

[0056] S3: Slowly add B liquid to A liquid to heat stirring to carry out polymerization reaction;

[0057] S4: When the reaction system is viscous, stop stirring, continue to react for 1 h, filter after the reaction is finished, wash with anhydrous ethanol and distilled water, to obtain the solid water special for indoor potted plants, the prepared solid water has water content about 80.5%.

[0058] Comparative Example 3:

[0059] S1: In a four-necked flask, nitrogen was introduced for 10 min to remove air, deionized water was added, heated to 81 DEG C, stirred uniformly, and when the temperature dropped to 45 DEG C, it was kept unchanged, then the gelatin gum was added to the flask to prepare A liquid; wherein the mass ratio of low acyl gelatin gum and high acyl gelatin gum was 5:4, deionized water was 400 ml, heating and stirring for 1.5 h;

[0060] S2: The acrylic acid solution was taken and neutralized in the ice bath condition by adding 25% NaOH solution, and the neutralization reaction was an exothermic reaction, so it was carried out in the ice bath condition, and after the neutralization liquid was cooled to room temperature, monomer 2-acrylamide-2-methylpropane sulfonic acid, initiator potassium persulfate, inorganic material bentonite, crosslinking agent methylene bisacrylamide were added and stirred uniformly to prepare B liquid; wherein 40 mL of acrylic acid was taken to make the neutralization degree 60%, 0.5% of potassium persulfate, the ratio of acrylamide-2-methylpropane sulfonic acid and acrylic acid was 1:1, bentonite was 4%, methylene bisacrylamide was 0.4%, the stirring speed was 250 rpm, and the stirring time was 1.5 h;

[0061] S3: B liquid was slowly added to A liquid, and the polymerization reaction was carried out by heating and stirring;

[0062] S4: When the reaction system was viscous, the stirring was stopped, and the reaction was continued for 1 h, and the reaction was finished, and the product was washed with anhydrous ethanol and distilled water to obtain the solid water for indoor potted plants, and the water content of the prepared solid water was about 72.2%.

[0063] Performance test

[0064] The solid water obtained in examples 1-3 and comparative examples 1-3 was subjected to potted plant detection, and the water content, water loss rate and photosynthetic rate test was carried out on the potted plants.

[0065] Table 1 shows the test results of examples 1-3 and comparative examples 1-3

[0066]

[0067] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for making a proprietary solid water for indoor potted plants, characterized by: The raw materials of the solid water include wheat bran, sodium alginate, gellan gum, monomer acrylic acid solution, sodium hydroxide solution, inorganic material bentonite, monomer 2-acrylamide-2-methylpropane sulfonic acid, crosslinking agent methylene bisacrylamide, initiator potassium persulfate; comprising the following steps: S1: in a four-necked flask, nitrogen was introduced for 10 minutes to remove air, wheat bran and wheat B starch wastewater were added, and heating was performed at 72-90℃ with stirring until the temperature dropped to 35-55℃, then the temperature was kept unchanged, then sodium alginate and gellan gum were added to the flask to prepare A liquid; S2: the acrylic acid solution was taken and neutralized in an ice bath with 25% NaOH solution. The neutralization reaction is an exothermic reaction, so it is performed in an ice bath. After the neutralization liquid is cooled to room temperature, monomer 2-acrylamide-2-methylpropane sulfonic acid, initiator potassium persulfate, inorganic material bentonite, and crosslinking agent methylene bisacrylamide are added and stirred uniformly to prepare B liquid; S3: B liquid is slowly added to A liquid, and the temperature is increased and stirred to perform polymerization reaction. A liquid is used as the main reactant, and B liquid is more convenient to add to A liquid; S4: when the reaction system is viscous, stop stirring, continue to react for 0.5-2h, filter, wash with anhydrous ethanol and distilled water, and obtain solid water for indoor potted plants; In S1, the content of wheat bran accounts for 2%-10% of the total weight of solid water raw materials, the content of wheat B starch accounts for 2%-5% of the total weight of solid water raw materials, the content of sodium alginate accounts for 1%-7% of the total weight of solid water raw materials, the content of gellan gum accounts for 1%-2% of the total weight of solid water raw materials, the mass ratio of low acyl gellan gum to high acyl gellan gum in gellan gum is (2:1)-(1:2), the amount of deionized water is 300-500mL, the heating and stirring time is 0.5-2h, and the heating temperature is 72-90℃; In S2, the amount of acrylic acid is 20-60mL, the neutralization degree is 40%-70%, the amount of initiator potassium persulfate accounts for 0.05%-1% of the mass of acrylic acid monomer, the mass ratio of 2-acrylamide-2-methylpropane sulfonic acid to acrylic acid is (1:3)-(2:1), the content of crosslinking agent methylene bisacrylamide accounts for 0.05%-1.0% of the mass of acrylic acid monomer, the content of bentonite accounts for 2%-5% of the mass of acrylic acid monomer, the stirring speed is 150-350rpm, and the stirring temperature is 60-80℃; In S3, the stirring speed is 150-350rpm, the temperature is increased to 65-85℃ for polymerization reaction, and the reaction time is 1-4h.

2. A method of making a solid water for a potted plant in a room according to claim 1, characterized by: In S2, the stirring time of bentonite is 0.5-1.5h.

3. The use of the indoor potted plant-specific solid water prepared according to the preparation method of claim 1, characterized in that: In S4, the surface of the obtained solid water is cut into a "V" shape, which is in contact with the roots of the potted plants, and then the soil is filled for the use of potted plants.

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