CN106106720A - A kind of antibacterial degradable loofah fiber membrane preparation method - Google Patents
A kind of antibacterial degradable loofah fiber membrane preparation method Download PDFInfo
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- CN106106720A CN106106720A CN201610477197.7A CN201610477197A CN106106720A CN 106106720 A CN106106720 A CN 106106720A CN 201610477197 A CN201610477197 A CN 201610477197A CN 106106720 A CN106106720 A CN 106106720A
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- retinervus luffae
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/153—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of liquids or solids
- A23B7/154—Organic compounds; Microorganisms; Enzymes
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- Polymers & Plastics (AREA)
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Abstract
The present invention relates to a kind of antibacterial degradable loofah fiber membrane preparation method, belong to preservative film technical field.For plastics package breathability, poisture-penetrability, mechanical property is not enough, and plastics package is difficult to degraded in soil, rots, difficulty is reclaimed in classification, burn and produce harmful substance, to problems such as subsoil water and soil pollute after burying, the invention provides a kind of antibacterial degradable loofah fiber membrane preparation method.The present invention uses unfresh towel gourd to be raw material, take out Retinervus Luffae Fructus, it is pyrolyzed filtration after crushed, preparing Retinervus Luffae Fructus extracting solution, after the impurity such as colloid, protein, chlorophyll and the pectin in chitosan solution clarification extracting solution, nanocrystalline fiber stirring clear liquid and absorbent cotton prepared is mixed to prepare emulsion, and with poly-vinyl alcohol solution and EVA emulsion blending, it is configured to casting solution, with film rod casting film-forming on vinyon, obtains antibacterial degradable loofah fiber film.
Description
Technical field
The present invention relates to a kind of antibacterial degradable loofah fiber membrane preparation method, belong to preservative film technical field.
Background technology
China is maximum in the world vegetable production and consumption state, there are about 1.3 hundred million tons of vegetables every year and in accumulating and sells stream
Rotting during Tong, direct economic loss reaches more than 1,000 hundred million yuan, and China's economy is caused tremendous influence.Due to fresh vegetables
Dish still carries out Repiration after plucking, nutrient substance contained therein there is oxidation and produce heat, carbon dioxide, moisture with
And the metabolite such as ethylene, at normal temperatures directly storage vegetable dehydration can be caused to wilt, old and feeble, thus lose commercial value.Cause
This, in the storage process of vegetable, the use of fresh-keeping packaging material has great importance.
Based on affect above the various factors of fresh-keeping of vegetables time, the vegetable after harvesting is packed, fresh-keeping after enter again
Marketing is sold, and can greatly reduce the economic loss that vegetable spoilage causes.In paper, plastics, metal, this four large packing material of glass,
Owing to plastics have various informative, light and easy modification, the many advantages such as lucuriant in design, therefore, plastics package is by people
Accept extensively.Owing to the fresh vegetables after plucking still carries out Repiration, consume the nutrient substance stored, thus produce heat
The metabolites such as amount, carbon dioxide, moisture, ethylene.Low oxygen, high carbon dioxide concentration are for reducing the interior fruit and vegerable of packaging
Repiration has a preferable effect, but oxygen concentration is too low easily causes fruit and vegerable anaerobic respiration, and gas concentration lwevel is too high the most right
Fruit and vegerable produce CO2Injury, packaging bag humidity is the biggest, and antibacterial the most easily grows, thus accelerates rotting of fruit and vegerable.Therefore, gas is used
During tune, dank material packaging vegetable, the aqueous vapor that vegetable metabolism produces can distribute in time, and can shape in packaging bag
Become suitable O2And CO2Atmosphere, provides the pack environment of relative ideal, thus extends the storage phase of vegetable, prevent vegetable for vegetable
Rot, go bad.
Plastics packed use is that the life of people is provided convenience, and improves the quality of the life of people simultaneously, but abandons
After environment can be caused serious impact.Such as, plastics package is difficult to degraded in soil, rots, and difficulty is reclaimed in classification, burns
Produce harmful substance, after burying, subsoil water and soil are polluted, hinder animal and plant growth, endanger people directly or indirectly
The existence of class is with healthy.Therefore, response country Ecological Civilization Construction, the requirement of sustainable development, find and prepare and can biological drop
Solve, environmentally friendly green plastic packaging material are the main paties currently solving this problem.
Summary of the invention
The technical problem to be solved: for plastics package breathability, poisture-penetrability, mechanical property is not enough, and
Plastics package is difficult to degraded in soil, rots, and difficulty is reclaimed in classification, burns and produces harmful substance, after burying to subsoil water and
The problems such as soil pollutes, the invention provides a kind of antibacterial degradable loofah fiber membrane preparation method.The present invention uses
Unfresh towel gourd is raw material, takes out Retinervus Luffae Fructus, is pyrolyzed filtration after crushed, prepares Retinervus Luffae Fructus extracting solution, carries with chitosan solution clarification
After taking the impurity such as the colloid in liquid, protein, chlorophyll and pectin, nanocrystalline fiber stirring clear liquid and absorbent cotton prepared is mixed
Close prepare emulsion, and with poly-vinyl alcohol solution and EVA emulsion blending, be configured to casting solution, with film rod on vinyon
Casting film-forming, obtains antibacterial degradable loofah fiber film.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
(1) take 5 ~ 8 unfresh towel gourds, remove crust and sarcocarp, be washed with deionized 2 ~ 3 times, natural air drying, remove seed,
Retinervus Luffae Fructus, adds Retinervus Luffae Fructus pulverizer and pulverizes, cross 60 mesh sieves, take the luffa vegetable sponge after 80 ~ 100g sieves and 0.9 ~ 1.0L
Deionized water mixes, and in 70 ~ 75 DEG C of waters bath with thermostatic control, after 200r/min stirring 8 ~ 9h, filters, removes filtering residue, obtain Retinervus Luffae Fructus
Lixiviating solution, standby；
(2) weighing 5.0 ~ 5.5g chitosan, adding 500 ~ 550mL mass concentration is 1% acetum, stirs, add 100 ~
150mL above-mentioned Retinervus Luffae Fructus lixiviating solution, stirs 1 ~ 2h at 50 ~ 55 DEG C, is cooled to room temperature, stand 10 ~ 12h, filter, take filtrate,
Obtain Retinervus Luffae Fructus clear liquid；
(3) weighing 12 ~ 15g absorbent cotton, being soaked in 200 ~ 250mL mass concentration is in 64% concentrated sulphuric acid, adds 1.2 ~ 1.5g sulphuric acid
Copper, agitating heating 45 ~ 50min at 45 ~ 50 DEG C, add 1.2 ~ 1.5L deionized water, proceed to centrifuge, with 5000 ~ 5500r/
Min, centrifugal 12 ~ 15min, collect lower floor's turbid solution, repeat above-mentioned centrifugally operated 3 ~ 5 times, merge turbid solution, add mass concentration
It is 30% sodium hydroxide regulation pH to 7 ~ 8, after 100W ultrasound wave dispersion 20 ~ 30min, adds spray dryer, be dried to obtain nanometer
Crystalline cellulose powder；
(4) weigh the nanocrystalline fiber dust of above-mentioned 5 ~ 8g and add in above-mentioned steps (2) the Retinervus Luffae Fructus clear liquid prepared, stirring 10 ~
12h, obtains cellulose emulsion；
(5) count by weight, be 5% poly-vinyl alcohol solution by mass concentration prepared by 70 ~ 75 parts of above-mentioned steps (2), 140 ~
150 parts of EVA emulsions, 80 ~ 105 parts of above-mentioned cellulose emulsion mixing, stir 2 ~ 3h, with film rod, blending emulsion is moulded at polyethylene
Casting film-forming on material base material, inserts in 60 ~ 65 DEG C of drying baker, is dried 20 ~ 24h, obtains antibacterial degradable loofah fiber film.
The application process of the present invention is: the antibacterial degradable loofah fiber film cladding fruit and vegerable present invention prepared, and extends
Fruit and vegerable shelf life 2 ~ 3 days, antibiotic property improves 70 ~ 75%, with after preservative film soil bury 15 ~ 20 days, degradation rate is 70 ~
80%。
The method have the benefit that:
(1) the antibacterial degradable loofah fiber film hot strength that prepared by the present invention is high, and elongation at break is good, antibiotic property and intensification
Degradation property is outstanding.
(2) production technology of the present invention is simple, green, environmental protection.
Detailed description of the invention
Take 5 ~ 8 unfresh towel gourds, remove crust and sarcocarp, be washed with deionized 2 ~ 3 times, natural air drying, remove seed,
Retinervus Luffae Fructus, adds Retinervus Luffae Fructus pulverizer and pulverizes, cross 60 mesh sieves, take the luffa vegetable sponge after 80 ~ 100g sieves and 0.9 ~ 1.0L
Deionized water mixes, and in 70 ~ 75 DEG C of waters bath with thermostatic control, after 200r/min stirring 8 ~ 9h, filters, removes filtering residue, obtain Retinervus Luffae Fructus
Lixiviating solution, standby；Weighing 5.0 ~ 5.5g chitosan, adding 500 ~ 550mL mass concentration is 1% acetum, stirs, adds
Enter 100 ~ 150mL above-mentioned Retinervus Luffae Fructus lixiviating solution, at 50 ~ 55 DEG C, stir 1 ~ 2h, be cooled to room temperature, stand 10 ~ 12h, filter, take
Filtrate, obtains Retinervus Luffae Fructus clear liquid；Weighing 12 ~ 15g absorbent cotton, being soaked in 200 ~ 250mL mass concentration is in 64% sulphuric acid, add 1.2 ~
1.5g copper sulfate, agitating heating 45 ~ 50min at 45 ~ 50 DEG C, add 1.2 ~ 1.5L deionized water, proceed to centrifuge, with 5000
~ 5500r/min, centrifugal 12 ~ 15min, collect lower floor's turbid solution, repeat above-mentioned centrifugally operated 3 ~ 5 times, merge turbid solution, add
Mass concentration is 30% sodium hydroxide regulation pH to 7 ~ 8, after 100W ultrasound wave dispersion 20 ~ 30min, adds spray dryer, dry
Dry nanocrystalline fiber dust；Weigh in the Retinervus Luffae Fructus clear liquid that the nanocrystalline fiber dust of above-mentioned 5 ~ 8g adds above-mentioned preparation, stirring
10 ~ 12h, obtains cellulose emulsion；Count by weight, be 5% poly-vinyl alcohol solution by the mass concentration of 70 ~ 75 parts of above-mentioned preparations,
140 ~ 150 parts of EVA emulsions, 80 ~ 105 parts of above-mentioned cellulose emulsion mixing, stir 2 ~ 3h, with film rod by blending emulsion in poly-second
Casting film-forming on alkene plastics base material, inserts in 60 ~ 65 DEG C of drying baker, is dried 20 ~ 24h, obtains antibacterial degradable loofah fiber film.
Example 1
Take 5 unfresh towel gourds, remove crust and sarcocarp, be washed with deionized 2 times, natural air drying, remove seed, obtain Retinervus Luffae Fructus,
Retinervus Luffae Fructus adds pulverizer pulverize, cross 60 mesh sieves, take the luffa vegetable sponge after 80g sieves and mix with 0.9L deionized water,
In 70 DEG C of waters bath with thermostatic control, after 200r/min stirring 8h, filter, remove filtering residue, obtain Retinervus Luffae Fructus lixiviating solution, standby；Weigh 5.0g
Chitosan, adding 500mL mass concentration is 1% acetum, stirs, and adds 100mL above-mentioned Retinervus Luffae Fructus lixiviating solution, 50
Stir 1h at DEG C, be cooled to room temperature, stand 10h, filter, take filtrate, obtain Retinervus Luffae Fructus clear liquid；Weigh 12g absorbent cotton, be soaked in
200mL mass concentration is in 64% sulphuric acid, adds 1.2g copper sulfate, agitating heating 45min at 45 DEG C, adds 1.2L deionized water,
Proceed to centrifuge, with 5000r/min, centrifugal 12min, collects lower floor's turbid solution, repeats above-mentioned centrifugally operated 3 times, merge muddiness
Liquid, adding mass concentration is 30% sodium hydroxide regulation pH to 7, after 100W ultrasound wave dispersion 20min, adds spray dryer,
It is dried to obtain nanocrystalline fiber dust；Weigh in the Retinervus Luffae Fructus clear liquid that the nanocrystalline fiber dust of above-mentioned 5g adds above-mentioned preparation, stirring
10h, obtains cellulose emulsion；Count by weight, be 5% poly-vinyl alcohol solution by the mass concentration of 70 parts of above-mentioned preparations, 140 parts
EVA emulsion, 80 parts of above-mentioned cellulose emulsion mixing, stir 2h, with film rod, blending emulsion is flowed on vinyon base material
Prolong film forming, insert in 60 DEG C of drying baker, be dried 20h, obtain antibacterial degradable loofah fiber film.
The application process of the present invention is: the antibacterial degradable loofah fiber film cladding fruit and vegerable present invention prepared, and extends
Fruit and vegerable shelf life 2 days, antibiotic property improves 70%, and the preservative film soil after using buries 15 days, and degradation rate is 70%.
Example 2
Take 7 unfresh towel gourds, remove crust and sarcocarp, be washed with deionized 2 times, natural air drying, remove seed, obtain Retinervus Luffae Fructus,
Retinervus Luffae Fructus adds pulverizer pulverize, cross 60 mesh sieves, take the luffa vegetable sponge after 90g sieves and mix with 0.9L deionized water,
In 72 DEG C of waters bath with thermostatic control, after 200r/min stirring 8.5h, filter, remove filtering residue, obtain Retinervus Luffae Fructus lixiviating solution, standby；Weigh
5.2g chitosan, adding 520mL mass concentration is 1% acetum, stirs, and adds 120mL above-mentioned Retinervus Luffae Fructus lixiviating solution,
At 52 DEG C, stir 1.5h, be cooled to room temperature, stand 11h, filter, take filtrate, obtain Retinervus Luffae Fructus clear liquid；Weigh 13g absorbent cotton, leaching
Steep in 220mL mass concentration is 64% sulphuric acid, add 1.3g copper sulfate, agitating heating 48min at 48 DEG C, add 1.3L go from
Sub-water, proceeds to centrifuge, with 5300r/min, centrifugal 13min, collects lower floor's turbid solution, repeats above-mentioned centrifugally operated 4 times, merge
Turbid solution, adding mass concentration is 30% sodium hydroxide regulation pH to 7, after 100W ultrasound wave dispersion 25min, adds spray dried
Dry device, is dried to obtain nanocrystalline fiber dust；Weigh in the Retinervus Luffae Fructus clear liquid that the nanocrystalline fiber dust of above-mentioned 7g adds above-mentioned preparation,
Stirring 11h, obtains cellulose emulsion；Count by weight, be 5% poly-vinyl alcohol solution by the mass concentration of 72 parts of above-mentioned preparations,
145 parts of EVA emulsions, 95 parts of above-mentioned cellulose emulsion mixing, stir 2.5h, with film rod by blending emulsion at vinyon base
Casting film-forming on material, inserts in 62 DEG C of drying baker, is dried 22h, obtains antibacterial degradable loofah fiber film.
The application process of the present invention is: the antibacterial degradable loofah fiber film cladding fruit and vegerable present invention prepared, and extends
Fruit and vegerable shelf life 2 days, antibiotic property improves 72%, and the preservative film soil after using buries 18 days, and degradation rate is 75%.
Example 3
Take 8 unfresh towel gourds, remove crust and sarcocarp, be washed with deionized 3 times, natural air drying, remove seed, obtain Retinervus Luffae Fructus,
Retinervus Luffae Fructus adds pulverizer pulverize, cross 60 mesh sieves, take the luffa vegetable sponge after 100g sieves and mix with 1.0L deionized water,
In 75 DEG C of waters bath with thermostatic control, after 200r/min stirring 9h, filter, remove filtering residue, obtain Retinervus Luffae Fructus lixiviating solution, standby；Weigh 5.5g
Chitosan, adding 550mL mass concentration is 1% acetum, stirs, and adds 150mL above-mentioned Retinervus Luffae Fructus lixiviating solution, 55
Stir 2h at DEG C, be cooled to room temperature, stand 12h, filter, take filtrate, obtain Retinervus Luffae Fructus clear liquid；Weigh 15g absorbent cotton, be soaked in
250mL mass concentration is in 64% sulphuric acid, adds 1.5g copper sulfate, agitating heating 50min at 50 DEG C, adds 1.5L deionized water,
Proceed to centrifuge, with 5500r/min, centrifugal 15min, collects lower floor's turbid solution, repeats above-mentioned centrifugally operated 5 times, merge muddiness
Liquid, adding mass concentration is 30% sodium hydroxide regulation pH to 8, after 100W ultrasound wave dispersion 30min, adds spray dryer,
It is dried to obtain nanocrystalline fiber dust；Weigh in the Retinervus Luffae Fructus clear liquid that the nanocrystalline fiber dust of above-mentioned 8g adds above-mentioned preparation, stirring
12h, obtains cellulose emulsion；Count by weight, be 5% poly-vinyl alcohol solution by the mass concentration of 75 parts of above-mentioned preparations, 150 parts
EVA emulsion, 105 parts of above-mentioned cellulose emulsion mixing, stir 3h, with film rod, blending emulsion is flowed on vinyon base material
Prolong film forming, insert in 65 DEG C of drying baker, be dried 24h, obtain antibacterial degradable loofah fiber film.
The application process of the present invention is: the antibacterial degradable loofah fiber film cladding fruit and vegerable present invention prepared, and extends
Fruit and vegerable shelf life 3 days, antibiotic property improves 75%, and the preservative film soil after using buries 20 days, and degradation rate is 80%.
Claims (1)
1. an antibacterial degradable loofah fiber membrane preparation method, it is characterised in that concrete preparation process is:
(1) take 5 ~ 8 unfresh towel gourds, remove crust and sarcocarp, be washed with deionized 2 ~ 3 times, natural air drying, remove seed,
Retinervus Luffae Fructus, adds Retinervus Luffae Fructus pulverizer and pulverizes, cross 60 mesh sieves, take the luffa vegetable sponge after 80 ~ 100g sieves and 0.9 ~ 1.0L
Deionized water mixes, and in 70 ~ 75 DEG C of waters bath with thermostatic control, after 200r/min stirring 8 ~ 9h, filters, removes filtering residue, obtain Retinervus Luffae Fructus
Lixiviating solution, standby；
(2) weighing 5.0 ~ 5.5g chitosan, adding 500 ~ 550mL mass concentration is 1% acetum, stirs, add 100 ~
150mL above-mentioned Retinervus Luffae Fructus lixiviating solution, stirs 1 ~ 2h at 50 ~ 55 DEG C, is cooled to room temperature, stand 10 ~ 12h, filter, take filtrate,
Obtain Retinervus Luffae Fructus clear liquid；
(3) weighing 12 ~ 15g absorbent cotton, being soaked in 200 ~ 250mL mass concentration is in 64% sulphuric acid, adds 1.2 ~ 1.5g copper sulfate,
Agitating heating 45 ~ 50min at 45 ~ 50 DEG C, adds 1.2 ~ 1.5L deionized water, proceeds to centrifuge, with 5000 ~ 5500r/min,
Centrifugal 12 ~ 15min, collects lower floor's turbid solution, repeats above-mentioned centrifugally operated 3 ~ 5 times, merges turbid solution, adds mass concentration and is
30% sodium hydroxide regulation pH to 7 ~ 8, after 100W ultrasound wave dispersion 20 ~ 30min, adds spray dryer, is dried nanocrystalline
Fiber dust；
(4) weigh the nanocrystalline fiber dust of above-mentioned 5 ~ 8g and add in above-mentioned steps (2) the Retinervus Luffae Fructus clear liquid prepared, stirring 10 ~
12h, obtains cellulose emulsion；
(5) count by weight, be 5% poly-vinyl alcohol solution by 70 ~ 75 parts of mass concentrations, 140 ~ 150 parts of EVA emulsions, 80 ~ 105
Part above-mentioned cellulose emulsion mixing, stirs 2 ~ 3h, with film rod by blending emulsion casting film-forming on vinyon base material, puts
Enter in 60 ~ 65 DEG C of drying baker, be dried 20 ~ 24h, obtain antibacterial degradable loofah fiber film.
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| CN201610477197.7A CN106106720A (en) | 2016-06-27 | 2016-06-27 | A kind of antibacterial degradable loofah fiber membrane preparation method |
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| CN201610477197.7A CN106106720A (en) | 2016-06-27 | 2016-06-27 | A kind of antibacterial degradable loofah fiber membrane preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107261189A (en) * | 2017-06-23 | 2017-10-20 | 广西师范学院 | The preparation method of sisal fiber environmental protection hospital gauze |
| CN116693906A (en) * | 2023-07-07 | 2023-09-05 | 珠海嘉雄包装材料有限公司 | High-strength PE composite film and preparation process thereof |
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| CN103131033A (en) * | 2013-03-20 | 2013-06-05 | 福建农林大学 | Method for preparing nano manganese dioxide/nano microcrystalline cellulose composite films |
| CN105037812A (en) * | 2015-08-21 | 2015-11-11 | 广西大学 | Antimicrobial degradable packaging material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107261189A (en) * | 2017-06-23 | 2017-10-20 | 广西师范学院 | The preparation method of sisal fiber environmental protection hospital gauze |
| CN107261189B (en) * | 2017-06-23 | 2020-05-19 | 南宁师范大学 | Preparation method of sisal fiber environment-friendly medical gauze |
| CN116693906A (en) * | 2023-07-07 | 2023-09-05 | 珠海嘉雄包装材料有限公司 | High-strength PE composite film and preparation process thereof |
| CN116693906B (en) * | 2023-07-07 | 2023-11-28 | 珠海嘉雄包装材料有限公司 | High-strength PE composite film and preparation process thereof |
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