CN106000347B - A kind of preparation method of banana skin drier and the mould proof packet of drying containing banana skin drier - Google Patents

Abstract

The invention provides a method for preparing a banana peel desiccant and a dry anti-mold bag containing the banana peel desiccant. The method cleans and cuts the banana peel, and immerses the cut banana peel in an acetic acid-ethanol solution activation, and then freeze-dry, crush and sieve the activated banana peel to obtain the banana peel desiccant. The dry anti-mold package includes a dry anti-mold package body made of air-permeable materials, and the package body is filled with the banana peel desiccant prepared above. The banana peel desiccant of the present invention is natural and safe, has excellent moisture absorption effect, turns waste into wealth, improves the added value of the banana industry, and is more environmentally friendly.

Description

A kind of preparation method of banana peel desiccant and drying anti-drying agent containing banana peel desiccant Mold bag

technical field

The invention belongs to the technical field of desiccants, and in particular relates to a preparation method of a banana peel desiccant and a dry anti-mold bag containing the banana peel desiccant.

Background technique

There are many types of desiccants, such as: quicklime desiccant, calcium chloride desiccant, silica gel desiccant and so on. Quicklime desiccants, calcium chloride desiccants, and silica gel desiccants are widely used because of their good drying effect and low price. However, in recent years, there have been many incidents of eye injuries caused by the explosion of the above-mentioned desiccants. It is not uncommon to see desiccant, which has attracted widespread attention; and the existing desiccant still has or uses chemical components, which have certain toxicity. Once the outer packaging leaks, it is easy to contaminate food and other substances that need to be preserved, or the preparation method complex deficiencies. Based on this, it is very meaningful to develop a new type of desiccant. Desiccants are generally packaged in air-permeable paper materials, which will contaminate the food in the package if they are damaged or leaked.

The use of natural plant components to prepare desiccants has attracted widespread attention because of its safety, sanitation, and environmental protection. However, if unprocessed plant components are directly used as desiccants, the drying effect is limited and the moisture absorption capacity is weak, which cannot guarantee good performance. Food waiting to be preserved has been stored in a dry environment during the shelf life, and it is easy to cause mold and spoilage of food and other substances during the shelf life. Therefore, how to process natural plant ingredients to make them have stronger moisture absorption capacity is very interesting. value.

Contents of the invention

Aiming at the above-mentioned deficiencies in the prior art, the technical problem to be solved in the present invention is to provide a desiccant in the prior art that is easy to explode, has low safety performance, limited moisture absorption capacity, and is likely to cause the risk of accidental ingestion. The invention discloses a preparation method of a banana peel natural desiccant which is natural, safe and excellent in hygroscopic effect, and a dry anti-mold bag containing the banana peel desiccant.

In order to solve the above-mentioned technical problems, the present invention adopts following technical scheme: a kind of preparation method of banana peel desiccant, comprises the steps:

1) Wash and cut the banana peel;

2) Ethanol and acetic acid were prepared into an ethanol-acetic acid mixed solution at a volume ratio of 4-6:1, and the banana peel cut in step 1) was immersed in the ethanol-acetic acid mixed solution for activation treatment for 3-7 h; , the mass volume ratio of described banana peel and ethanol-acetic acid mixed solution is 400～600 g/L;

3) After step 2) the activated banana peels were frozen at -60~-40°C for 2~4 hours, then freeze-dried at -20~-30°C and vacuum degree of 40~65 Pa for 8~10 hours. h;

4) Crushing and sieving the dried banana peels in step 3), and selecting the 20-40 mesh sieves to obtain the banana peel desiccant.

A dry anti-mildew package comprises a dry anti-mold package body made of air-permeable material, and the package body is filled with the banana peel desiccant prepared by the above-mentioned method.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention uses a mixed solution of acetic acid and ethanol as an activator. The banana peel is immersed in the activator, so that part of the organic matter in the banana peel can be dissolved in the activator. After the organic matter is dissolved, pores are left in the banana peel. The structural voids in the banana peel increase, and the overall specific surface area increases, so that the functional groups in the banana peel that can chemically bond with water are exposed more, and then the activated banana peel can be more in contact with water molecules. Offer better conditions.

2. The water absorption rate of the banana peel desiccant of the present invention can reach 38% (when the relative humidity RH=40%), while the water absorption rate of the existing silica gel and other desiccants is only 20% (HG/T2765-2005, when RH=40% ≥ 20%), it can be seen that the water absorption rate of the banana peel desiccant of the present invention is 1.8 times that of the existing desiccant, and unexpected technical effects have been achieved.

3. The banana peel desiccant prepared by the present invention is yellow, and the color has obvious changes before and after water absorption, that is, from powder to block, and the color changes from yellow to light black, which can facilitate consumers to judge the banana peel. Whether the desiccant has absorbed water, it is convenient to replace the new banana peel desiccant in time to ensure the drying effect.

4. The banana peel desiccant of the present invention is completely made of pure natural plant fibers, and has no harm to the human body. Even if it is taken by mistake, it will not have any impact on the human body. It has a delicate fragrance, and is especially suitable for high-grade food and baby food, etc. dry use.

5. The amount of banana peel resources is huge. People generally throw away banana peels after eating bananas, which not only wastes resources but also pollutes the environment. The present invention not only improves the added value of the banana industry by making banana peels into desiccants , farmers increase production and efficiency, but also protect the environment, so that food safety has been guaranteed.

Detailed ways

The present invention will be described in further detail below in conjunction with specific embodiments. This implementation case is carried out on the premise of the technology of the present invention, and the detailed implementation and specific operation process are given to illustrate the inventiveness of the present invention, but the protection scope of the present invention is not limited to the following examples.

Example 1

A preparation method of banana peel desiccant, comprising the steps of:

1) Take fresh banana peel and wash it with tap water, and cut it into squares of about 5 mm×5 mm in size, so that it can fully contact with the activation liquid during subsequent activation, and increase the specific surface area during the freeze-drying process to improve the drying process. rate;

2) Ethanol and acetic acid were prepared into an ethanol-acetic acid mixed solution at a volume ratio of 4:1, and the banana peels cleaned and cut in step 1) were immersed in the prepared ethanol-acetic acid mixed solution for 5 h of activation treatment. Wherein, the mass volume ratio of described banana peel and ethanol-acetic acid mixed solution is 400g/L;;

3) Freeze the banana peels after the activation treatment in step 2) at -60°C for 2 hours, then freeze-dry them at a freeze-drying temperature of -20°C and a vacuum of 40 Pa for 8 hours;

4) The banana peel after the freeze-drying treatment in step 3) is crushed and sieved, and the 40-mesh sieve is selected to obtain the banana peel desiccant.

The water absorption rate of the banana peel desiccant prepared in this example is measured. The specific measurement method is: use an electronic balance to accurately and quickly weigh three parts of the same quality desiccant, place it in a constant temperature and humidity box, select a specific temperature and Humidity, take it out at regular intervals and weigh it on an electronic balance to calculate the water absorption rate.

Water absorption rate = [(product weight after water absorption - product weight before water absorption) / product weight before water absorption] × 100%

The results of measuring the water absorption rate of the banana peel desiccant in this example are as follows: at a room temperature of 25°C and a relative humidity (RH) of 40%, the water absorption rate of the banana peel desiccant in this example can reach 13% in 10 minutes, and the water absorption rate in 30 minutes The water absorption rate can reach 22%, and the water absorption rate can reach 33% in 60 minutes, while the water absorption rate of existing silica gel and other desiccants is only 20% (HG/T2765-2005, when RH=40% ≥ 20%), compared with Say the water absorption of the present invention has improved 65%.

Further, this embodiment also provides a dry anti-mildew package, which includes a dry anti-mold package body made of non-woven fabric, and the package is filled with the banana peel desiccant prepared in this embodiment.

Example 2

A preparation method of banana peel desiccant, comprising the steps of:

1) Take fresh banana peel and wash it with tap water, and cut it into squares of about 5 mm×5 mm in size, so that it can fully contact with the activation liquid during subsequent activation, and increase the specific surface area during the freeze-drying process to improve the drying process. rate;

2) Prepare ethanol and acetic acid at a volume ratio of 5:1 to make an ethanol-acetic acid mixed solution. Immerse the cleaned and cut banana peels in step 1) into the prepared ethanol-acetic acid mixed solution. Ultrasonic at 60°C and 400W Under the condition of power, carry out activation treatment 3 h, wherein, the mass volume ratio of described banana peel and ethanol-acetic acid mixed solution is 500g/L;

3) Freeze the banana peel after the activation treatment in step 2) at -40°C for 4 hours, then freeze-dry at -30°C and vacuum degree of 65 Pa for 10 hours;

4) The banana peel after the freeze-drying treatment in step 3) is crushed and sieved, and the 20-mesh sieve is selected to obtain the banana peel desiccant.

The water absorption rate of the banana peel desiccant prepared in this example was measured. The specific measurement method was the same as in Example 1. The results of the water absorption rate measurement of the banana peel desiccant in this example were as follows: at room temperature 25°C, relative humidity (RH) 40 %, the water absorption rate of the banana peel desiccant in this embodiment can reach 17% in 10 minutes, 27% in 30 minutes, and 38% in 60 minutes, while the water absorption rate of existing silica gel and other desiccants Only 20% (HG/T2765-2005, when RH=40% ≥ 20%), compared to the water absorption rate of the present invention increased by 90%.

Further, this embodiment also provides a dry anti-mildew bag, including a dry anti-mold bag made of polypropylene filter cloth, and the bag is filled with the banana peel desiccant, activated carbon, corn porous The mixture of starch and calcium propionate, the banana peel desiccant, activated carbon, corn porous starch and calcium propionate are mixed in a mass ratio of 60:10:5:2.

Example 3

A preparation method of banana peel desiccant, comprising the steps of:

1) Take fresh banana peel and wash it with tap water, and cut it into squares of about 5 mm×5 mm in size, so that it can fully contact with the activation liquid during subsequent activation, and increase the specific surface area during the freeze-drying process to improve the drying process. rate;

2) Prepare ethanol and acetic acid at a volume ratio of 6:1 to make an ethanol-acetic acid mixed solution. Immerse the cleaned and cut banana peels in step 1) into the prepared ethanol-acetic acid mixed solution. Ultrasonic at 40°C and 200W Activation treatment was carried out for 5 h under the condition of power, wherein, the mass volume ratio of the banana peel and ethanol-acetic acid mixed solution was 600g/L;

3) Freeze the banana peels after the activation treatment in step 2) at -50°C for 3 hours, and then freeze-dry at -25°C and vacuum degree of 55Pa for 9 hours;

4) The banana peel after the freeze-drying treatment in step 3) is crushed and sieved, and the 30-mesh sieve is selected to obtain the banana peel desiccant.

The water absorption rate of the banana peel desiccant prepared in this example was measured. The specific measurement method was the same as in Example 1. The results of the water absorption rate measurement of the banana peel desiccant in this example were as follows: at room temperature 25°C, relative humidity (RH) 40 %, the water absorption rate of the banana peel desiccant in this embodiment can reach 15% in 10 minutes, 25% in 30 minutes, and 35% in 60 minutes, while the water absorption rate of existing silica gel and other desiccants Only 20% (HG/T2765-2005, when RH=40% ≥ 20%), compared to the water absorption rate of the present invention increased by 75%.

Further, this embodiment also provides a dry anti-mold package, including a dry anti-mold package made of tissue paper, the package is filled with the banana peel desiccant, activated carbon, and corn porous starch prepared in this embodiment With the mixture of calcium propionate, described banana peel desiccant, active carbon, corn porous starch and calcium propionate are mixed with the mass ratio of 70:20:8:5.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (5)

1. a kind of preparation method of banana skin drier, includes the following steps：

1）It takes fresh banana skin to be cleaned through tap water, and is cut into the square of the mm of 5 mm × 5 or so size, so that subsequent activation When can be come into full contact with activated liquid, and the specific surface area in freeze-drying process is made to increase, to improve rate of drying；

2）By ethyl alcohol and acetic acid according to 5:1 volume ratio is configured to Ethanol-Acetic Acid mixed solution, by step 1）It cleans and after cutting Banana skin immerse in the Ethanol-Acetic Acid mixed solution that is configured to, carried out at activation under conditions of 60 DEG C, 400W ultrasonic powers Manage 3 h, wherein the mass volume ratio of the banana skin and Ethanol-Acetic Acid mixed solution is 500g/L；

3）By step 2）After banana skin after activation process freezes 4h at -40 DEG C, in -30 DEG C of freeze temperature, 65 Pa of vacuum degree Lower freeze-drying 10h；

4）By step 3）Banana skin after frozen dried carries out broken and processing of being sieved, and chooses 20 mesh and sieves screenings, obtains described Banana skin drier；

In 25 DEG C of room temperature, relative humidity（RH）When 40%, 10 minutes water absorption rates of banana skin drier were up to 17%, 30 minute Water absorption rate up to 27%, 60 minute water absorption rate up to 38%.

2. a kind of mould proof packet of drying, which is characterized in that including with dry mould proof packet backpack body made of gas permeable material, in the backpack body Filled with using banana skin drier made from claim 1 method.

3. drying mould proof packet according to claim 2, which is characterized in that the gas permeable material includes non-woven fabrics, polypropylene fibre filter cloth Or cotton paper.

4. drying mould proof packet according to claim 2, which is characterized in that be also filled with activated carbon, porous shallow lake in the backpack body Powder and calcium propionate.

5. drying mould proof packet according to claim 4, which is characterized in that by the banana skin drier, activated carbon, porous shallow lake Powder and calcium propionate are with 60 ~ 70:10~20:5~8:After 2 ~ 5 mass ratio mixing, mixture is packed into the backpack body.