CN110229241A - A method of potato hydrexypropylated starch is prepared based on cold plasma - Google Patents
A method of potato hydrexypropylated starch is prepared based on cold plasma Download PDFInfo
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- C08B31/00—Preparation of derivatives of starch
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Abstract
The invention belongs to starch conversion technical fields, disclose a kind of method for preparing potato hydrexypropylated starch based on cold plasma.Pure water is handled with cold plasma, plasma active water is obtained, potato starch is added in cold plasma voltage-resistant reactor with plasma active water then and is uniformly mixed, starch milk is obtained；After standing a period of time, adds alkali and carry out basification；Propylene oxide is passed through in gained alkalization starch milk, cold plasma processing is carried out under inert atmosphere protection, then insulation reaction, product is washed, filtering, drying, crushes, and obtains potato hydrexypropylated starch.Using plasma active water of the present invention produces starch milk, can play the molten effect of acid, is greatly improved reaction rate with cold plasma processing starch milk before reactions.And reaction process reduces the volatilization of propylene oxide without additional heating, saves reagent, environmentally protective.
Description
Technical field
The invention belongs to starch conversion technical fields, and in particular to one kind prepares potato hydroxypropyl based on cold plasma
The method of starch.
Background technique
Potato is one of main source of ative starch, innovation, the higher technique for preparing potato starch of efficiency of research and development
The development of process and Related product is the necessary trend of potato industry development.On the one hand it is linked due to starch by α-(Isosorbide-5-Nitrae)-
D-Glucose forms, and a large amount of activity hydroxies are contained on molecule, intramolecular and intermolecular hydrogen bonding are easily formed, so starch itself contains
Higher crystal region, indissoluble, infusibility, another aspect potato starch particle is larger, and surface is smooth, and reaction contact area is smaller,
These two aspects reason causes it to be not easy to act on chemistry or biological degeneration agent, therefore, effective technical method how to be taken to make horse
Bell sweet potato starch reactivity increases to produce the potato hydrexypropylated starch compared with high substituted degree and improve and rate is replaced to be one
Critical problem.
Hydroxypropul starch belongs to non-ionic starch ether, have stability is good, it is smaller to be influenced by electrolyte in environment and pH, with
And the fine qualities such as good viscosity stability and water-soluble.Hydroxypropul starch is the very extensive converted starch of purposes, greatly
Amount is applied in the industrial circles such as food, medicine, papermaking, weaving, fine chemistry industry.Currently, the preparation method master of hydroxypropul starch
There are wet starch milk, dry method, organic solvent method.Wet starch milk technique is that sodium sulphate is added in starch milk to inhibit particle swollen
It is swollen, base catalyst and with alkylating reagent effect under 40 DEG C -50 DEG C in closed container at a temperature of react for 24 hours be made product,
The shortcomings that wet processing is that the reaction time is longer, and degree of substitution is lower；Dry process be starch containing under a small amount of moisture with solid base
The product degree of substitution of the product produced with alkylation gas reaction, dry process production is higher, but operating process is more dangerous, and
The high substituted degree product of this method production is not suitable for food service industry since remaining reagent is more；Organic solvent method be by
Then starch dispersion reacts in alcohol or ketone organic solvent with alkylating reagent, this method can be made forms sediment compared with high substitution value hydroxypropyl
Powder, but the method there are toxic, higher cost, recycling is difficult the disadvantages of.Using above-mentioned when being especially raw material with potato starch
When method produces hydroxypropul starch, the hydroxyalkyl starch reagent to be expended for producing degree of substitution of the same race is more, and elapsed time is longer.
Patent 105481990A discloses a kind of method that green high-pressure process prepares hydroxypropul starch, by pre-swollen starch and epoxy third
After alkane mixes in a high pressure reaction kettle, under nitrogen atmosphere, reacted under the conditions of Yu Wendu 40-120 DEG C, pressure 0.3-1.2MPa
30-180min recycles unreacted propylene oxide after reaction, obtains hydroxypropul starch finished product.This method does not need additionally
The raw materials such as other dispersing agents, catalyst are added, reduce raw material type and dosage, but this method needs to be added excessive epoxy
Propane reagent, the price of propylene oxide costly, increase the cost of reaction.And its object widely applied is para arrowroot
Powder, cornstarch etc. are prone to the raw starch replaced, and are applied to more difficult substituted potato starch and then replace rate not
It is high.In addition, this method still needs to be heated under high pressure, certain safety problem is had in actual production process.
Summary of the invention
In place of the above shortcoming and defect of the existing technology, the purpose of the present invention is to provide one kind based on cold etc.
The method that gas ions prepare potato hydrexypropylated starch.
The object of the invention is achieved through the following technical solutions:
A method of potato hydrexypropylated starch is prepared based on cold plasma, is included the following steps:
(1) pure water is handled with cold plasma, plasma active water is obtained, then by potato starch and plasma
Body active water is added in cold plasma voltage-resistant reactor and is uniformly mixed, and obtains starch milk；After standing a period of time, then
Alkali is added and carries out basification；
(2) propylene oxide is passed through in the alkalization starch milk of step (1), is carried out at cold plasma under inert atmosphere protection
It manages, then insulation reaction, product is washed, filtering, drying, crushes, and obtains potato hydrexypropylated starch.
Further, the voltage of the processing of cold plasma described in step (1) is 50kV, and frequency control is 55Hz, power
In 200W, gas flow rate is 9~10L/min for control, and gas source is oxygen and nitrogen mixed gas, and the processing time is 30s.The oxygen
The volume ratio of gas and nitrogen mixed gas are as follows: oxygen 2%, nitrogen 98%.
Further, the time of standing described in step (1) is 1h.
Further, the pH of basification described in step (1) is 9.5~10.
Further, propylene oxide additive amount described in step (2) is the 20%~40% of potato starch butt quality.
Further, the voltage of the processing of cold plasma described in step (2) is 80KV, and frequency control is 55Hz, power
Control is 18~20L/min in 300W, gas flow rate, and gas source is pure nitrogen gas, and the processing time is 60~120 seconds.
Further, the temperature control of insulation reaction described in step (2) is 45~50 DEG C.
Further, step (2) washing, which refers to, uses ethanol washing.
In the method for the present invention, potato starch is pre-processed with plasma active water first, reaches potato starch
Then the purpose of acidification and perforation alkalizes, propylene oxide is added, cold plasma processing a period of time is carried out under inert atmosphere,
Insulation reaction again can be obtained product after purification.
Preparation method of the invention have the following advantages that and the utility model has the advantages that
(1) starch milk is configured using plasma activation water, the molten effect of acid can be played, preliminary sour water solution can be improved
The ratio of amylose in potato starch, in addition, the active material in plasma active water include ozone, hydrogen peroxide,
The Multiple components such as reactive oxygen species, ultraviolet light, charged particle, photon and high-energy electron including superoxide anion etc., with life
Interaction between object polymer, polar hydrophilic group are introduced into biopolymer, to improve the water solubility of starch.And
And by forming the high activation site of multiple reactivities in the molecule, would be more advantageous in the substitution for improving hydroxypropylation reaction
The yield of degree and product.
(2) electric discharge of cold plasma generates etching action, smooth horse to potato starch surface in closed container
Bell sweet potato starch particle surface will form more multi-pore channel, replace instead so that alkylating reagent enters inside potato starch particle
It answers, improves reaction speed, save time and cost, be conducive to large-scale production.
(3) due to having plasma species in the space of entire reaction process, the breeding of microorganism is suppressed, product
Quality is more secure.
(4) due to that can generate partial heat in cold plasma processing, which need not be heated again, i.e.,
It can sufficiently react, reduce volatilization and the hydrolysis of propylene oxide, on the one hand avoid due to being alkylated examination under high temperature and pressure
Agent gas causes the danger of explosion, on the other hand also saves the use of alkylating reagent, reduces environmental pollution to the greatest extent.
Detailed description of the invention
Fig. 1 is the knot that cold plasma handles used RF type cold plasma processing equipment in the embodiment of the present invention
Structure schematic diagram.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
Cold plasma processing uses RF type cold plasma processing equipment, device structure signal in following embodiment
Figure has plasma jet rifle 15 and electric mixer 10 in the process chamber 8 as shown in Figure 1, including process chamber 8, described etc.
There are high-field electrode 12 and insulating ceramics 13 in gas ions rifle 15, being connected with plasma jet rifle 15 is mechanical-stretching arm 6,
Shown process chamber 8 and 3 connection of control room have high-voltage radio-frequency generator 16 in shown control room 3, and control room 3 is connect with power supply 17,
The control room 3 is also connected with liquid oxygen and liquid nitrogen mixed gas tank 1 and liquid nitrogen container 2, and the process chamber 8 is additionally provided with feed inlet 7, into
Material mouth 7 is arranged with valve 18；The process chamber 8 is also connect with liquid nitrogen container 9；8 outside of process chamber adds equipped with circulator bath
Hot device 14；The process chamber 8 is additionally provided with vent valve 4；The process chamber 8 is connect by pressure vacuum gauge 5 with vacuum pump 11.
Embodiment 1
The method for preparing potato hydrexypropylated starch based on cold plasma of the present embodiment is described in detail below:
With cold plasma processing pure water, (voltage 50kV, frequency control is 55Hz, and power control is in 200W, gas
Flow velocity is 9L/min, and gas source is oxygen and nitrogen mixed gas (volume ratio is oxygen 2%, nitrogen 98%), and the processing time is
30s obtains plasma active water.It weighs to be sufficiently stirred in 200g potato starch addition plasma active water and be configured to
The potato starch cream of 500g after standing a hour, is added sodium hydroxide for PH and is adjusted to 9.5, goed deep into starch milk with pipeline,
Propylene oxide reagent 40ml is added, after it is uniformly dispersed, rapid closed container is passed through pure nitrogen gas after vacuumizing, in High Purity Nitrogen
Protection under, carry out cold plasma processing 60s (voltage 80KV, frequency control be 55Hz, power control is in 300W, gas
Flow velocity is 18L/min, and gas source is pure nitrogen gas), controlled at 45 DEG C, after being stirred to react 1h, the ethyl alcohol that 3 times of amounts are added stands one
It is taken out after the section time from reactor and carries out centrifuge washing, repetitive operation 3 times, hydroxypropyl is made using filter, after freeze-drying and forms sediment
Powder is finally crushed to required particle size range.After measured, the molar substitution (MS) of the hydroxypropul starch of the present embodiment is
0.425。
Embodiment 2
With cold plasma processing pure water, (voltage 50kV, frequency control is 55Hz, and power control is in 200W, gas
Flow velocity is 10L/min, and gas source is oxygen and nitrogen mixed gas (volume ratio is oxygen 2%, nitrogen 98%), and the processing time is
30s), plasma active water is obtained.It weighs to be sufficiently stirred in 200g potato starch addition plasma active water and be configured to
The potato starch cream of 500g after standing a hour, is added sodium hydroxide for PH and is adjusted to 10, goed deep into starch milk with pipeline,
Propylene oxide reagent 60ml is added, after it is uniformly dispersed, rapid closed container is passed through pure nitrogen gas after vacuumizing, in High Purity Nitrogen
Protection under, carry out cold plasma processing 90s (voltage 80KV, frequency control be 55Hz, power control is in 300W, gas
Flow velocity is 20L/min, and gas source is pure nitrogen gas), controlled at 50 DEG C, after being stirred to react 1h, the ethyl alcohol that 3 times of amounts are added stands one
It is taken out after the section time from reactor and carries out centrifuge washing, repetitive operation 3 times, hydroxypropyl is made using filter, after freeze-drying and forms sediment
Powder is finally crushed to required particle size range.After measured, the molar substitution (MS) of the hydroxypropul starch of the present embodiment is
0.523。
Embodiment 3
With cold plasma processing pure water, (voltage 50kV, frequency control is 55Hz, and power control is in 200W, gas
Flow velocity is 9L/min, and gas source is oxygen and nitrogen mixed gas (volume ratio is oxygen 2%, nitrogen 98%), and the processing time is
30s), plasma active water is obtained.It weighs to be sufficiently stirred in 200g potato starch addition plasma active water and be configured to
The potato starch cream of 500g after standing a hour, is added sodium hydroxide for PH and is adjusted to 10, goed deep into starch milk with pipeline,
Propylene oxide reagent 80ml is added, after it is uniformly dispersed, rapid closed container is passed through pure nitrogen gas after vacuumizing, in High Purity Nitrogen
Protection under, carry out cold plasma processing 120s (voltage 80KV, frequency control be 55Hz, power control is in 300W, gas
Flow velocity is 18L/min, and gas source is pure nitrogen gas), controlled at 50 DEG C, after being stirred to react 1h, the ethyl alcohol that 3 times of amounts are added stands one
It is taken out after the section time from reactor and carries out centrifuge washing, repetitive operation 3 times, hydroxypropyl is made using filter, after freeze-drying and forms sediment
Powder is finally crushed to required particle size range.After measured, the molar substitution (MS) of the hydroxypropul starch of the present embodiment is
0.809。
Embodiment 4
With cold plasma processing pure water, (voltage 50kV, frequency control is 55Hz, and power control is in 200W, gas
Flow velocity is 10L/min, and gas source is oxygen and nitrogen mixed gas (volume ratio is oxygen 2%, nitrogen 98%), and the processing time is
30s), plasma active water is obtained.It weighs to be sufficiently stirred in 200g potato starch addition plasma active water and be configured to
The potato starch cream of 500g after standing a hour, is added sodium hydroxide for PH and is adjusted to 9.5, goed deep into starch milk with pipeline,
Propylene oxide reagent 80ml is added, after it is uniformly dispersed, rapid closed container is passed through pure nitrogen gas after vacuumizing, in High Purity Nitrogen
Protection under, carry out cold plasma processing 180s (voltage 80KV, frequency control be 55Hz, power control is in 300W, gas
Flow velocity is 20L/min, and gas source is pure nitrogen gas), controlled at 45 DEG C, after being stirred to react 1h, the ethyl alcohol that 3 times of amounts are added stands one
It is taken out after the section time from reactor and carries out centrifuge washing, repetitive operation 3 times, hydroxypropyl is made using filter, after freeze-drying and forms sediment
Powder is finally crushed to required particle size range.After measured, the molar substitution (MS) of the hydroxypropul starch of the present embodiment is
1.165。
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (9)
1. a kind of method for preparing potato hydrexypropylated starch based on cold plasma, it is characterised in that include the following steps:
(1) pure water is handled with cold plasma, obtains plasma active water, it is then that potato starch and plasma is living
Property water, which is added in cold plasma voltage-resistant reactor, to be uniformly mixed, and starch milk is obtained；After standing a period of time, add
Alkali carries out basification；
(2) propylene oxide is passed through in the alkalization starch milk of step (1), cold plasma processing is carried out under inert atmosphere protection,
Then insulation reaction, product is washed, filtering, drying, crushes, and obtains potato hydrexypropylated starch.
2. a kind of method for preparing potato hydrexypropylated starch based on cold plasma according to claim 1, feature
Be: the voltage of the processing of cold plasma described in step (1) is 50kV, and frequency control is 55Hz, and power control is in 200W, gas
Body flow velocity is 9~10L/min, and gas source is oxygen and nitrogen mixed gas, and the processing time is 30s.
3. a kind of method for preparing potato hydrexypropylated starch based on cold plasma according to claim 2, feature
It is: the volume ratio of the oxygen and nitrogen mixed gas are as follows: oxygen 2%, nitrogen 98%.
4. a kind of method for preparing potato hydrexypropylated starch based on cold plasma according to claim 1, feature
Be: the time of standing described in step (1) is 1h.
5. a kind of method for preparing potato hydrexypropylated starch based on cold plasma according to claim 1, feature
Be: the pH of basification described in step (1) is 9.5~10.
6. a kind of method for preparing potato hydrexypropylated starch based on cold plasma according to claim 1, feature
Be: propylene oxide additive amount described in step (2) is the 20%~40% of potato starch butt quality.
7. a kind of method for preparing potato hydrexypropylated starch based on cold plasma according to claim 1, feature
Be: the voltage of the processing of cold plasma described in step (2) is 80KV, and frequency control is 55Hz, and power control is in 300W, gas
Body flow velocity is 18~20L/min, and gas source is pure nitrogen gas, and the processing time is 60~120 seconds.
8. a kind of method for preparing potato hydrexypropylated starch based on cold plasma according to claim 1, feature
Be: the temperature control of insulation reaction described in step (2) is 45~50 DEG C.
9. a kind of method for preparing potato hydrexypropylated starch based on cold plasma according to claim 1, feature
Be: step (2) washing, which refers to, uses ethanol washing.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112863994A (en) * | 2021-01-28 | 2021-05-28 | 华南理工大学 | Device and method for modifying pectin by using dielectric barrier discharge cold plasma |
| CN115058047A (en) * | 2022-07-29 | 2022-09-16 | 中国热带农业科学院香料饮料研究所 | Method for preparing potato porous starch |
| CN115159676A (en) * | 2022-07-28 | 2022-10-11 | 宁波水思清环境科技有限公司 | Biological filter material for denitrification treatment, preparation method thereof and sewage treatment agent |
| CN115572750A (en) * | 2022-11-03 | 2023-01-06 | 江南大学 | Preparation method of polymorphic resistant starch |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112863994A (en) * | 2021-01-28 | 2021-05-28 | 华南理工大学 | Device and method for modifying pectin by using dielectric barrier discharge cold plasma |
| CN115159676A (en) * | 2022-07-28 | 2022-10-11 | 宁波水思清环境科技有限公司 | Biological filter material for denitrification treatment, preparation method thereof and sewage treatment agent |
| CN115058047A (en) * | 2022-07-29 | 2022-09-16 | 中国热带农业科学院香料饮料研究所 | Method for preparing potato porous starch |
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| CN115572750A (en) * | 2022-11-03 | 2023-01-06 | 江南大学 | Preparation method of polymorphic resistant starch |
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| WO2024092983A1 (en) * | 2022-11-03 | 2024-05-10 | 江南大学 | Method for preparing polymorphic resistant starch |
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