CN110301650A - A kind of modified rice bran dietary fiber and its preparation method and application - Google Patents
A kind of modified rice bran dietary fiber and its preparation method and application Download PDFInfo
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- CN110301650A CN110301650A CN201910716510.1A CN201910716510A CN110301650A CN 110301650 A CN110301650 A CN 110301650A CN 201910716510 A CN201910716510 A CN 201910716510A CN 110301650 A CN110301650 A CN 110301650A
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- 235000013325 dietary fiber Nutrition 0.000 title claims abstract description 156
- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 108
- 235000009566 rice Nutrition 0.000 title claims abstract description 108
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 240000007594 Oryza sativa Species 0.000 title 1
- 241000209094 Oryza Species 0.000 claims abstract description 107
- 238000005422 blasting Methods 0.000 claims abstract description 30
- 238000000227 grinding Methods 0.000 claims abstract description 26
- 230000036961 partial effect Effects 0.000 claims abstract description 12
- 230000004048 modification Effects 0.000 claims description 15
- 238000012986 modification Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 7
- 238000000498 ball milling Methods 0.000 claims description 6
- 235000013305 food Nutrition 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 229910052726 zirconium Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 29
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 abstract description 12
- 239000008103 glucose Substances 0.000 abstract description 12
- 235000013339 cereals Nutrition 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002708 enhancing effect Effects 0.000 abstract description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 20
- 238000010521 absorption reaction Methods 0.000 description 11
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 10
- 238000004880 explosion Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
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- 229920005610 lignin Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229920002488 Hemicellulose Polymers 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229920001282 polysaccharide Polymers 0.000 description 3
- 239000005017 polysaccharide Substances 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
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- -1 Arene compound Chemical class 0.000 description 2
- 238000001157 Fourier transform infrared spectrum Methods 0.000 description 2
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- 238000011953 bioanalysis Methods 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
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- 239000007789 gas Substances 0.000 description 2
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- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 235000009754 Vitis X bourquina Nutrition 0.000 description 1
- 235000012333 Vitis X labruscana Nutrition 0.000 description 1
- 240000006365 Vitis vinifera Species 0.000 description 1
- 235000014787 Vitis vinifera Nutrition 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
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- 239000006227 byproduct Substances 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
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- 229920002678 cellulose Polymers 0.000 description 1
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- 230000000378 dietary effect Effects 0.000 description 1
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- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 235000013376 functional food Nutrition 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
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- 231100000252 nontoxic Toxicity 0.000 description 1
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- 230000010148 water-pollination Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/20—Reducing nutritive value; Dietetic products with reduced nutritive value
- A23L33/21—Addition of substantially indigestible substances, e.g. dietary fibres
- A23L33/22—Comminuted fibrous parts of plants, e.g. bagasse or pulp
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L7/00—Cereal-derived products; Malt products; Preparation or treatment thereof
- A23L7/10—Cereal-derived products
- A23L7/115—Cereal fibre products, e.g. bran, husk
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
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- Nutrition Science (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
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- Mycology (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
Abstract
The invention belongs to cereal processing technique fields more particularly to a kind of modified rice bran dietary fiber and its preparation method and application.Rice bran dietary fiber is carried out steam blasting by the present invention, obtains broken rice bran dietary fiber；The broken rice bran dietary fiber is pulverized, modified rice bran dietary fiber is obtained.The present invention is using the content of soluble dietary fiber in the modified rice bran dietary fiber of modified dietary fiber that steam blasting-superfine grinding method is prepared up to 9.86 ± 0.18g/100g, functionality enhancing；The partial size for the modified dietary fiber that the present invention is prepared is 7.63 μm, specific surface area 4.13m2/ g, good crushing effect are in good taste；Modified rice bran dietary fiber prepared by the present invention significantly increases the adsorption capacity of glucose, and adsorbance is up to 2.55mg/g.
Description
Technical field
The present invention relates to cereal processing technique field more particularly to a kind of modified rice bran dietary fiber and preparation method thereof and
Using.
Background technique
As the byproduct of cereal processing, rice bran is a kind of all-natural product, nontoxic, can be used for improving the drink of people
Food.As people's lives level is continuously improved, diet is more and more exquisiter, and the shortage of dietary fiber is also increasingly tighter in diet
Weight.The research and application of dietary fiber will become one of the research hotspot of functional food.
The content of soluble dietary fiber is to evaluate an important indicator of physiological function of diet fiber in dietary fiber.So
And the dietary fiber in rice bran is mostly insoluble diedairy fiber, which limits it preferably to play corresponding function.Institute
To be modified to rice bran dietary fiber, become research hotspot both domestic and external to improve soluble dietary fibre content.Mesh
Before, it include chemical method, physical method (extruding, ultramicro grinding and nanometer method) and biology to the method that rice bran dietary fiber is modified
Modified method (enzyme process and microbe fermentation method).However, soluble dietary is fine in the rice bran dietary fiber of existing method of modifying preparation
The content of dimension is relatively low, affects the performance of its effect.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation method of modified rice bran dietary fiber, rice bran is can be improved in this method
The content of soluble dietary fiber in dietary fiber, solves the problems, such as dietary fiber rough mouthfeel, while enhancing dietary fiber pair
The absorbability of glucose.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of preparation methods of modified rice bran dietary fiber, comprising the following steps:
Rice bran dietary fiber is subjected to steam blasting, obtains broken rice bran dietary fiber；
The broken rice bran dietary fiber is pulverized, modified rice bran dietary fiber is obtained.
Preferably, 100 mesh of partial size < of the rice bran dietary fiber.
Preferably, the pressure of the steam blasting is 0.3~1.5MPa, and the time of the steam blasting is 120~360s.
Preferably, the mode of the ultramicro grinding is that high energy nanometer impacts ball milling.
Preferably, the time of the ultramicro grinding is 6~12h, and the ball material volume ratio of the ultramicro grinding is 2:1.
Preferably, the ball-milling medium of the ultramicro grinding is zirconia ball.
Preferably, after completing the steam blasting, resulting material is dried, obtains broken rice bran dietary fiber.
Preferably, the temperature of the drying is 60 DEG C, and the time of the drying is 5~6h.
The present invention provides the modification rice bran dietary fibers that preparation method described in above-mentioned technical proposal is prepared.
The present invention provides application of the modified rice bran dietary fiber in food with low sugar content described in above-mentioned technical proposal.
The present invention provides a kind of preparation methods of modified rice bran dietary fiber, and it is quick-fried that rice bran dietary fiber is carried out steam
It is broken, obtain broken rice bran dietary fiber；The broken rice bran dietary fiber is pulverized, it is fine to obtain modified rice bran diet
Dimension.
The present invention pre-processes rice bran dietary fiber using steam explosion, (compared with bioanalysis) at low cost, less energy consumption
(compared with bioanalysis), pollution-free (compared with chemical method)；The present invention carries out pulverization process using superfine grinding method, has speed fast, dirty
Contaminate small, utilization rate is high, be easy to ferment and digest the advantages that；
The present invention is using the modified rice bran dietary fiber of modified dietary fiber that steam blasting-superfine grinding method is prepared
The content of middle soluble dietary fiber is up to 9.86 ± 0.18g/100g, functionality enhancing；
The partial size for the modified dietary fiber that the present invention uses steam blasting-superfine grinding method to be prepared for 7.63 μm,
Specific surface area 4.13m2/ g, good crushing effect, the modification rice bran dietary fiber being prepared it is in good taste；
The present invention is using steam blasting-superfine grinding method preparation modification rice bran dietary fiber to the adsorption energy of glucose
Power significantly increases, and adsorbance is up to 2.55mg/g.
Detailed description of the invention
Fig. 1 is the grain size distribution of modified dietary fiber prepared by comparative example 1~3 and embodiment 1；
Fig. 2 is the FTIR spectrum figure of modified dietary fiber prepared by comparative example 1~3 and embodiment 1；
Scanning electron microscope of the Fig. 3 for comparative example 1~3 and the modified dietary fiber of the preparation of embodiment 1 under different amplification
Figure.
Specific embodiment
The present invention provides a kind of preparation methods of modified rice bran dietary fiber, comprising the following steps:
Rice bran dietary fiber is subjected to steam blasting, obtains broken rice bran dietary fiber；
The broken rice bran dietary fiber is pulverized, modified rice bran dietary fiber is obtained.
Rice bran dietary fiber is carried out steam blasting by the present invention, obtains broken rice bran dietary fiber.In the present invention, described
Preferred 100 mesh of < of the partial size of rice bran dietary fiber, more preferable 200 mesh of <.
In the present invention, the pressure of the steam blasting is preferably 0.3~1.5MPa, more preferably 0.5~1.2MPa, most
Preferably 0.6~0.9MPa；The time of the steam blasting is preferably 120~360s, more preferably 150~300s, most preferably
For 180~250s.
In the present invention, rice bran dietary fiber is preferably placed in steam blasting examination by the detailed process of the steam blasting
It tests in the steam explosion cylinder on platform, turns piston, time and the pressure of steam blasting are set, high temperature and high pressure gas enters vapour by inlet valve
In cylinder, after the steam blasting time for reaching setting, inlet valve is closed, instant decompression completes material explosion, the rice after collecting explosion
Bran dietary fiber is dried, and by resulting material in room temperature preservation in brown bottle, obtains broken rice bran dietary fiber.
In the present invention, the high-temperature high pressure water that the high temperature and high pressure gas is preferably to derive from steam blasting testing stand steams
Vapour.In the present invention, the temperature of the drying is preferably 60 DEG C, and the time of the drying is preferably 5~6h.
After obtaining broken rice bran dietary fiber, the present invention pulverizes the broken rice bran dietary fiber, obtains
Modified rice bran dietary fiber.In the present invention, the mode of the ultramicro grinding is preferably high energy nanometer impact ball milling, and the present invention is excellent
Choosing carries out the ultramicro grinding using the impact grinding of high energy nanometer；The ball-milling medium of the ultramicro grinding is preferably zirconia ball.
In the present invention, the time of the ultramicro grinding is preferably 6~12h, more preferably 8~10h, most preferably 9h；
The ball material volume ratio of the ultramicro grinding is preferably 2:1.
The present invention pulverizes broken rice bran dietary fiber using the impact grinding of dry method high energy nanometer, the punching of high energy nanometer
Mill is hit under low temperature (tank body SAPMAC method system) by the quick multi-D swing movement of tank body, so that mill is situated between irregular in tank
Movement generates huge impact force, makes the broken exposure of the group in dietary fiber, to improve soluble in rice bran dietary fiber
The content of dietary fiber.
The present invention makes the internal structure of rice bran dietary fiber become thin using the Duplex treatment of steam blasting and ultramicro grinding
Pine, specific surface area increases, and slit and gap are produced between rice bran dietary fiber particle, and external solute enters fibrous inside
It is relatively more easy, and reticular structure is opened, become laminar structured, function group (free hydroxyl group group therein；Polysaccharide
C-H on middle methyl and methylene；Arene compound in lignin, lignin are insoluble dietary fibers in dietary fiber
Main constituents；Carboxyl (- COOH, COO), carbonyl (C=O)；C-O-C in hemicellulose sugar unit) exposure, make rice bran
Dietary fiber adsorbs the ability enhancing of glucose, so as to reduce the concentration of glucose in human small intestine, to blood sugar for human body
Control generates beneficial effect.
The present invention provides the modification rice bran dietary fibers that preparation method described in above-mentioned technical proposal is prepared.The present invention
The partial size for the modification rice bran dietary fiber being prepared is 7.63 μm, specific surface area 4.13m2/ g, good crushing effect, modified rice bran
Dietary fiber it is in good taste；The content of soluble dietary fiber is up to 9.86 ± 0.18g/100g in modified rice bran dietary fiber,
Functionality enhancing；Modified rice bran dietary fiber significantly increases the adsorption capacity of glucose, and adsorbance is up to 2.55mg/g.
The present invention provides application of the modified rice bran dietary fiber in food with low sugar content described in above-mentioned technical proposal.
Modified rice bran dietary fiber provided by the invention and its preparation method and application is carried out below with reference to embodiment detailed
Thin explanation, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
Rice bran dietary fiber is placed in steam blasting technique testing desk, steam blasting is carried out under the conditions of 0.6MPa
300s, the rice bran dietary fiber after collecting explosion, dries 5h under the conditions of 60 DEG C, obtains broken rice bran dietary fiber；
It is that mill is situated between with zirconia ball, under the conditions of ball material volume ratio is 2:1, by the broken rice bran dietary fiber using high
Energy nanometer impact grinding carries out crushing 6h, obtains modified rice bran dietary fiber.
Embodiment 2
Rice bran dietary fiber is placed in steam blasting technique testing desk, steam blasting is carried out under the conditions of 0.3MPa
300s, the rice bran dietary fiber after collecting explosion, dries 5h under the conditions of 60 DEG C, obtains broken rice bran dietary fiber；
It is that mill is situated between with zirconia ball, under the conditions of ball material volume ratio is 2:1, by the broken rice bran dietary fiber using high
Energy nanometer impact grinding carries out crushing 6h, obtains modified rice bran dietary fiber.
Embodiment 3
Rice bran dietary fiber is placed in steam blasting technique testing desk, steam blasting is carried out under the conditions of 0.9MPa
300s, the rice bran dietary fiber after collecting explosion, dries 5h under the conditions of 60 DEG C, obtains broken rice bran dietary fiber；
It is that mill is situated between with zirconia ball, under the conditions of ball material volume ratio is 2:1, by the broken rice bran dietary fiber using high
Energy nanometer impact grinding carries out crushing 6h, obtains modified rice bran dietary fiber.
Comparative example 1
Rice bran dietary fiber is placed in Universalpulverizer and carries out Ordinary pulverization, smashed dietary fiber sieves with 100 mesh sieve,
Obtain modified rice bran dietary fiber.
Comparative example 2
Rice bran dietary fiber is placed in steam blasting technique testing desk, steam blasting is carried out under the conditions of 0.6MPa
300s, the rice bran dietary fiber after collecting explosion, dries 5h under the conditions of 60 DEG C, obtains modified rice bran dietary fiber.
Comparative example 3
Rice bran dietary fiber is placed in steam blasting technique testing desk, steam blasting is carried out under the conditions of 0.6MPa
300s, the rice bran dietary fiber after collecting explosion, dries 5h under the conditions of 60 DEG C, obtains broken rice bran dietary fiber；
The broken rice bran dietary fiber is placed in airslide disintegrating mill, air-flow crushing is carried out under the conditions of 1.25MPa
30min obtains modified rice bran dietary fiber.
Test case
1) modification rice bran dietary fiber prepared by Examples 1 to 3 and comparative example 1~3 soluble dietary fiber is carried out to contain
It is fixed to measure, and specific measuring method is shown in Table 1 referring to GB 5009.88-2014, concrete outcome.
Soluble dietary fiber in modification rice bran dietary fiber prepared by 1 Examples 1 to 3 of table and comparative example 1~3 contains
Amount
As shown in Table 1, in modified dietary fiber prepared by the present invention the content of soluble dietary fiber up to 9.86g/
100g significantly improves the content of soluble dietary fiber in modified dietary fiber.
2) Examples 1 to 3 and comparative example 1~3 are made using laser particle analyzer, Fourier infrared spectrograph and scanning electron microscope
The structure of standby modification rice bran dietary fiber is characterized, and concrete outcome is shown in Fig. 1~3 and table 2.
Wherein, Fig. 1 is the grain size distribution of modified dietary fiber prepared by comparative example 1~3 and embodiment 1, specific data
2 are shown in Table, as seen from table, modified dietary fiber partial size prepared by the embodiment of the present invention 1 is 7.63 μm, specific surface area 4.13m2/ g,
Good crushing effect, so as to improve the mouthfeel of modified rice bran dietary fiber.
The particle diameter distribution and specific surface area of modification rice bran dietary fiber prepared by 2 Examples 1 to 3 of table and comparative example 1~3
(note: D [3,2] is bulk area average grain diameter, and D [4,3] is quality away from volume average particle size, and d (0,5) is average
Partial size, d (0,9) are boundary partial size.)
Fig. 2 is the FTIR spectrum figure of modified dietary fiber prepared by comparative example 1~3 and embodiment 1；It can by figure
Know, 3500~3200cm-1Place is the characteristic peak of hydroxyl, and the broad peak occurred herein is stretching for the O-H in cellulose and hemicellulose
Contracting vibration, illustrates there are free hydroxyl group group, so that absorption peak is broadened due to the hydrogen bond formed between intramolecular hydroxyl；2925cm-1It is attached
Closely it is the characteristic peak of carbohydrate, is the stretching vibration of C-H on methyl and methylene in polysaccharide herein；1654cm-1Neighbouring spike is
The characteristic absorption peak of arene compound in lignin, lignin are the main compositions of insoluble dietary fiber in dietary fiber
Ingredient, the dietary fiber after steam blasting is in 1652cm-1The absorption peak at place weakens；1425cm-1The absorption peak that place occurs is carboxyl
The absorption peak of stretching vibration or the asymmetric stretching vibration of (- COOH, COO) and carbonyl (C=O)；1060cm-1The one of left and right appearance
A wider absorption peak is the characteristic absorption peak of C-O-C in hemicellulose sugar unit.By comparative example 1 to embodiment 1, diet is fine
Hydroxyl peak is tieed up by original 3356cm-1To 3417cm-1It is mobile, illustrate that hydrogen bond formed in dietary fiber enhances, hydrophily increases
By force.
In addition, not having new absorption peak to occur in the infrared spectroscopy of modified dietary fiber prepared by embodiment 1, feature is inhaled
The quantity for receiving the peak type at peak, position and peak does not have significant change, but par-tial polysaccharide characteristic absorption peak intensity increases, and shows hydroxyl
Equal functional groups increase, and illustrate after modified, significant change does not occur for the chemical component of rice bran dietary fiber.
Scanning electron microscope of the Fig. 3 for comparative example 1~3 and the modified dietary fiber of the preparation of embodiment 1 under different amplification
Figure, as seen from the figure, biggish variation has occurred in the surface topography of dietary fiber particles before and after modification.It can from figure
Out, the dietary fiber structure law that prepared by comparative example 1 is compact, surface smooth regular, internal then be the hollow holey of one kind
Structure.Comparative example 2 is observed under 1~5 μm finds that dietary fiber structure of its preparation is cleaved, and is in fragment, and concave-convex surface is not whole,
It is loosely organized.Observation comparative example 3 is observed under 1~500 μm, it can be seen that the particle of dietary fiber is obviously reduced, the bee on surface
Nest shape structure becomes more crypto set, this increases its specific surface area, and the more groups of intramolecule are exposed, and then improve its water
Close property；1~5 μm for observing embodiment 1, compared with comparative example, the particle of dietary fiber is substantially reduced, the survey of this and partial size before
It is consistent to determine result；Dietary fiber prepared by embodiment 1 is observed under 1~50 μm, finds the dietary fiber of its preparation due to nanometer
High shear when crushing, structure disperses, flakes mostly in irregular shape and particle is smaller, space net structure disappears
It loses, in laminar structured, specific surface area is dramatically increased, it may be possible to since dietary fiber is after nanometer pulverization is handled, strand
Fracture, insoluble diedairy fiber resolve into soluble dietary fiber, molecular weight relative reduction, and the degree of polymerization reduces.
3) modification rice bran dietary fiber prepared by Examples 1 to 3 and comparative example 1~3 is subjected to glucose absorption ability
Modified rice bran dietary fiber is put into glucose solution (pH 7.0), magnetic agitation 7h is carried out under the conditions of 38 DEG C by measurement, will
The content for measuring glucose in supernatant after products therefrom centrifugation at 505nm, calculates glucose adsorbance.Concrete outcome is shown in Table
3。
The glucose adsorbance of modification rice bran dietary fiber prepared by 3 Examples 1 to 3 of table and comparative example 1~3
As shown in Table 3, the ability of modified rice bran dietary fiber absorption glucose prepared by the present invention is stronger.
As seen from the above embodiment, the present invention provides a kind of preparation method of modified rice bran dietary fiber, the present invention is adopted
Soluble dietary fiber in rice bran dietary fiber is modified with the modified dietary fiber that steam blasting-superfine grinding method is prepared
Content up to 9.86 ± 0.18g/100g, functionality enhancing；The partial size for the modified dietary fiber that the present invention is prepared is
7.63 μm, specific surface area 4.13m2/ g, good crushing effect are in good taste；Modified rice bran dietary fiber prepared by the present invention is to grape
The adsorption capacity of sugar significantly increases, and adsorbance is up to 2.55mg/g.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of preparation method of modified rice bran dietary fiber, which comprises the following steps:
Rice bran dietary fiber is subjected to steam blasting, obtains broken rice bran dietary fiber；
The broken rice bran dietary fiber is pulverized, modified rice bran dietary fiber is obtained.
2. preparation method according to claim 1, which is characterized in that 100 mesh of partial size < of the rice bran dietary fiber.
3. preparation method according to claim 1, which is characterized in that the pressure of the steam blasting is 0.3~1.5MPa,
The time of the steam blasting is 120~360s.
4. preparation method according to claim 1, which is characterized in that the mode of the ultramicro grinding is the impact of high energy nanometer
Ball milling.
5. the preparation method according to claim 4, which is characterized in that the time of the ultramicro grinding is 6~12h, described
The ball material volume ratio of ultramicro grinding is 2:1.
6. preparation method according to claim 4 or 5, which is characterized in that the ball-milling medium of the ultramicro grinding is oxidation
Zirconium ball.
7. preparation method according to claim 1, which is characterized in that after completing the steam blasting, by resulting material into
Row drying obtains broken rice bran dietary fiber.
8. preparation method according to claim 7, which is characterized in that the temperature of the drying is 60 DEG C, the drying
Time is 5~6h.
9. the modification rice bran dietary fiber that any one of claim 1~8 preparation method is prepared.
10. application of the modified rice bran dietary fiber in food with low sugar content described in claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910716510.1A CN110301650A (en) | 2019-08-05 | 2019-08-05 | A kind of modified rice bran dietary fiber and its preparation method and application |
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| CN201910716510.1A CN110301650A (en) | 2019-08-05 | 2019-08-05 | A kind of modified rice bran dietary fiber and its preparation method and application |
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Application publication date: 20191008 |