CN106798346A - The method that acid steam puffed stalk prepares dietary fiber - Google Patents
The method that acid steam puffed stalk prepares dietary fiber Download PDFInfo
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- CN106798346A CN106798346A CN201710040529.XA CN201710040529A CN106798346A CN 106798346 A CN106798346 A CN 106798346A CN 201710040529 A CN201710040529 A CN 201710040529A CN 106798346 A CN106798346 A CN 106798346A
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Abstract
The invention discloses the method that acid steam puffed stalk prepares dietary fiber, comprise the following steps：1), stalk adds the diluted acid to carry out steam explosion at 100 150 DEG C；2), steam explosion product is washed, is filtered, obtained the filter residue of the filtrate containing hemicellulose, containing cellulose and lignin；3), to step 2) in 1/2 filtrate that obtains add ethanol, soluble hemicellulose precipitation, filtering obtains hemicellulose, and 1/2 filtrate adds acid for adjusting pH to 5.0 5.5, and hydrolysis produces monose；4), by step 2) obtain filter residue ethanol boiling, filtering, obtain lignin filtrate, the filter residue containing cellulose；5), by step 4) obtain filtrate in acid condition with monose graft copolymerization, filtering, filter residue be lignin copolymer, in filtrate containing acid, return to step 3) hydrolysis；6), lignin copolymer, cellulose, hemicellulose and starch are mixed and obtains dietary fiber.The present invention solves the problems, such as that existing dietary fiber preparation method causes its mouthfeel poor.
Description
Technical field
The present invention relates to the preparing technical field of dietary fiber, and in particular to acid steam puffed stalk prepares the side of dietary fiber
Method.
Background technology
Dietary fiber is a kind of current functional food ingredient generally acknowledged in the world, is referred to as except water, protein, sugar
" the 7th nutrient " outside class, lipid, vitamin, the big nutrient of mineral matter 6, and be described as most being received in 21 century food industry
Concern, a kind of food additives with special healthcare function and food modifying function.Dietary fiber can be as a kind of effective
Functional health-care food prevention of various diseases, and with water-retaining property, Oil keeping, improve the special work(such as food color and local flavor
Effect, can improve human consumption's absorption, strengthen body discharges function, promote the diet structure balance of human body, hinder human body to one
A little eutrophic excessive absorptions, keep function equilibrium, prevent all kinds of calculus etc. to make with anticancer, step-down, reducing blood lipid, reducing slimming machine
With.
Contain dietary fiber in the crops such as stalk, water fruits and vegetables, but dietary fiber is extracted from water fruits and vegetables
It is relatively costly.And not only containing abundant dietary fiber in the crops such as stalk, forming preparation cost is relatively low, so adopting
It is a kind of industry development trend to prepare dietary fiber with stalk, and dietary fiber mainly includes cellulose, hemicellulose and lignin.
Dietary fiber compacted mass in stalk, it is relatively more inflexible, not only influence mouthfeel but also band is gone away when by human body
The efficiency reduction of body enteron aisle rubbish.Therefore, the dietary fiber in stalk is needed after cellulose, hemicellulose and lignin separation
Mixed again.
At present, acetic acid boiling and steam blasting are used in the isolation technics of dietary fiber, acetic acid boiling is easily caused preparation
Dietary fiber poor taste, common steam blasting because limited by temperature, although mouthfeel referring now to acetic acid boiling preferably,
But mouthfeel is still poor.
The content of the invention
It is an object of the invention to provide the method that acid steam puffed stalk prepares dietary fiber, existing dietary fiber system is solved
Preparation Method causes the poor problem of its mouthfeel.
The present invention is achieved through the following technical solutions：
The method that acid steam puffed stalk prepares dietary fiber, comprises the following steps：
1), stalk adds watery hydrochloric acid or dilute sulfuric acid to carry out steam explosion at 100-150 DEG C and obtains steam explosion product；
2), steam explosion product is washed, hemicellulose is taken off, filtering is obtained the filtrate containing hemicellulose, containing cellulose
With the filter residue of lignin；
3), to step 2) in 1/2 filtrate that obtains add ethanol, soluble hemicellulose precipitation, filtering obtains half fiber
Element, 1/2 filtrate adds acid for adjusting pH to 5.0-5.5, and hydrolysis produces monose；
4), by step 2) obtain filter residue ethanol boiling, filtering, obtain the filtrate containing ethanol and lignin, contain
The filter residue of cellulose；
5), by step 4) obtain filtrate in acid condition with step 2) obtain monose graft copolymerization, filtering, filter residue
It is lignin copolymer, acid, return to step 3 is contained in filtrate) for hydrolyzing；
6), by step 5) obtain lignin copolymer, step 4) obtain cellulose, step 3) obtain hemicellulose
And starch carries out mixing and obtains dietary fiber.
At present, acetic acid boiling and steam blasting are used in the isolation technics of dietary fiber, acetic acid boiling is without steam explosion skill
Art, directly uses acetic acid boiling stalk, and filtering contains hemicellulose and lignin in filtrate, filter residue is cellulose, then by filtrate
Containing hemicellulose and lignin separation, hemicellulose, lignin and cellulose are finally mixed into dietary fiber, acetic acid boiling
Be easily caused the dietary fiber poor taste of preparation, common steam blasting because limited by temperature, although mouthfeel is referring now to vinegar
Acid cooking is preferable, but mouthfeel is still poor.
Acid steam explosion of the present invention specifically refers to add the steam blasting of watery hydrochloric acid or dilute sulfuric acid, and specifically, steam is quick-fried
Broken is that stalk is sealed in the container with uniform temperature and pressure, and when the evaporation right pressure release of processus aboralis to a certain extent, stalk is just
Explosion is strutted, puffed rice is similar to.Temperature demolition effect higher is better in the reasonable scope, and the temperature of steam explosion have to be lower than 150 DEG C,
Because carrying out explosion higher than 150 DEG C can produce furfural, it is unfavorable for health, but 150 DEG C of meals for carrying out common steam explosion preparation
The mouthfeel for eating fiber is still poor, and the ratio of watery hydrochloric acid or dilute sulfuric acid and stalk is preferably 1:1-3.
The present invention is equally less than 150 DEG C of steam explosion by adding hydrochloric acid during steam explosion, its demolition effect and system
The mouthfeel of standby dietary fiber is substantially better than General Explosive, in this way, the present invention solves existing dietary fiber preparation method causing
The poor problem of its mouthfeel.
Also, the present invention prepares hydrolysis of the monose in dietary fiber from hemicellulose, has not only saved resource, and
Forming lignin copolymer has more preferable mouthfeel.
Principle of the invention：During (explosion thing is soluble in water) is washed, the hemicellulose dissolving in explosion thing
In water, in filter residue, by filter residue ethanol boiling, lignin dissolution is obtained in ethanol solution for lignin and cellulose
To the filtrate containing lignin.
Lignin of the present invention has aldehyde radical, and monose is in aqueous, partly ring-type, is partly chain, in monose
Phenolic hydroxyl group and lignin in aldehyde radical carry out phenol formaldehyde condensation reaction, then, the strand of lignin increases, molecular weight increase,
Filament with certain lines is changed into from original unbodied granular structure, chewy texture can not only be increased, strengthen mouthfeel,
And hydrophobicity can be improved, it is macromolecule that the lignin after improvement improves material, not easily digested, by human body
When directly take away rubbish and toxin in enteron aisle, play a part of toxicant elimination and fat cleanness.
To sum up, the lignin copolymer of preparation, cellulose, hemicellulose and starch are carried out mixing and obtain meals by the present invention
Food fiber not only increases the gas porosity of dietary fiber in stalk, and prepares lignin copolymer because by original unbodied
Granular structure is changed into the filament with certain lines and improves mouthfeel, meanwhile, steam explosion is carried out using diluted acid and improves fiber
Element, the mouthfeel of hemicellulose, and then, the dietary fiber prepared by the present invention has good mouthfeel.
Further, acid be hydrochloric acid, step 5) in acid condition be pH value be 5.0-6.0.
Further, step 1) in watery hydrochloric acid or dilute sulfuric acid and stalk ratio be 1：1-1.5.
Application is found by experiment that diluted acid has optimal steam explosion effect with stalk using aforementioned proportion steam explosion, and prepares
Dietary fiber mouthfeel it is optimal.
Further, step 5) in the weight ratio of filtrate and monose be 20-30：5-8.
Applicant proves that filtrate is 20-30 with the weight ratio of monose by lot of experiments：During 5-8, lignin copolymerization is formed
The mouthfeel of thing is optimal.
Further, step 6) middle sodium carbonate or sodium acid carbonate regulation pH to 4.5-6.0.
Further, step 6) in lignin copolymer, cellulose, hemicellulose and starch mixed proportion be 1:1.3-
1.8:1.5-2.0:2.5-3.0。
Aforementioned proportion mixing enables to prepare dietary fiber mouth and see reach most preferably.
Further, by step 4) obtain cellulose and be prepared into modified cellulose, it is lignin copolymer, cellulose, half fine
The mixed proportion of dimension element, modified cellulose and starch is 1:1.3-1.8:1.5-2.0:1.5-1.8：2.5-3.0.
Cellulose is prepared into modified cellulose and uses prior art, by adding modified cellulose in dietary fiber, has
Beneficial to the mouthfeel for providing dietary fiber.
The present invention compared with prior art, has the following advantages and advantages：
1st, the present invention by adding hydrochloric acid during steam explosion, be equally less than 150 DEG C of steam explosion, its demolition effect and
The mouthfeel of the dietary fiber of preparation is substantially better than General Explosive, in this way, the present invention solves existing dietary fiber preparation method leading
The problem for causing its mouthfeel poor.
2nd, the lignin copolymer of preparation, cellulose, hemicellulose and starch are carried out mixing and obtain meals by the present invention
Fiber not only increases the gas porosity of dietary fiber in stalk, and prepares lignin copolymer because by original unbodied powder
Shape structure is changed into the filament with certain lines and improves mouthfeel, meanwhile, using diluted acid carry out steam explosion improve cellulose,
The mouthfeel of hemicellulose, and then, the dietary fiber prepared by the present invention has good mouthfeel.
3rd, the present invention forms lignin copolymer, the strand of lignin by the way that lignin and monose are carried out into polycondensation reaction
Increase, molecular weight increase is changed into the filament with certain lines from original unbodied granular structure, can not only increase
Plus chewy texture, strengthen mouthfeel, and hydrophobicity can be improved；Also, the monose that the present invention is prepared in dietary fiber comes from half fiber
The hydrolysis of element, not only having saved resource, and formed lignin copolymer has more preferable mouthfeel.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment, the present invention is made
Further to describe in detail, exemplary embodiment of the invention and its explanation are only used for explaining the present invention, are not intended as to this
The restriction of invention.
Embodiment 1：
The method that acid steam puffed stalk prepares dietary fiber, comprises the following steps：
1), stalk adds watery hydrochloric acid or dilute sulfuric acid to carry out steam explosion at 100 DEG C and obtains steam explosion product；Wherein, watery hydrochloric acid or
The ratio of dilute sulfuric acid and stalk is 1：1；
2), steam explosion product is washed, hemicellulose is taken off, filtering is obtained the filtrate containing hemicellulose, containing cellulose
With the filter residue of lignin；
3), to step 2) in 1/2 filtrate that obtains add ethanol, soluble hemicellulose precipitation, filtering obtains half fiber
Element, 1/2 filtrate adds acid for adjusting pH to 5.0, and hydrolysis produces monose；
4), by step 2) obtain filter residue ethanol boiling, filtering, obtain the filtrate containing ethanol and lignin, contain
The filter residue of cellulose；
5), by step 4) obtain filtrate in acid condition with step 2) obtain monose graft copolymerization, filtering, filter residue
It is lignin copolymer, acid, return to step 3 is contained in filtrate) for hydrolyzing；Wherein, filtrate and the weight ratio of monose are 20：8；
6), by step 5) obtain lignin copolymer, step 4) obtain cellulose, step 3) obtain hemicellulose
And starch carries out mixing and obtains dietary fiber, and pH is adjusted to 4.5 with sodium carbonate or sodium acid carbonate, wherein, lignin copolymer,
The mixed proportion of cellulose, hemicellulose and starch is 1:1.3:1.5:2.5.
Embodiment 2：
The method that acid steam puffed stalk prepares dietary fiber, comprises the following steps：
1), stalk adds watery hydrochloric acid or dilute sulfuric acid to carry out steam explosion at 150 DEG C and obtains steam explosion product；Wherein, watery hydrochloric acid or
The ratio of dilute sulfuric acid and stalk is 1：1.5；
2), steam explosion product is washed, hemicellulose is taken off, filtering is obtained the filtrate containing hemicellulose, containing cellulose
With the filter residue of lignin；
3), to step 2) in 1/2 filtrate that obtains add ethanol, soluble hemicellulose precipitation, filtering obtains half fiber
Element, 1/2 filtrate adds acid for adjusting pH to 5.5, and hydrolysis produces monose；
4), by step 2) obtain filter residue ethanol boiling, filtering, obtain the filtrate containing ethanol and lignin, contain
The filter residue of cellulose；
5), by step 4) obtain filtrate in acid condition with step 2) obtain monose graft copolymerization, filtering, filter residue
It is lignin copolymer, acid, return to step 3 is contained in filtrate) for hydrolyzing, wherein, filtrate is 30 with the weight ratio of monose：5；
6), by step 5) obtain lignin copolymer, step 4) obtain cellulose, step 3) obtain hemicellulose
And starch carries out mixing and obtains dietary fiber, and pH is adjusted to 6.0 with sodium carbonate or sodium acid carbonate, wherein, lignin copolymer,
The mixed proportion of cellulose, hemicellulose and starch is 1:1.8:2.0:3.0.
Embodiment 3：
The method that acid steam puffed stalk prepares dietary fiber, comprises the following steps：
1), stalk adds watery hydrochloric acid or dilute sulfuric acid to carry out steam explosion at 120 DEG C and obtains steam explosion product；Wherein, watery hydrochloric acid or
The ratio of dilute sulfuric acid and stalk is 1：1.3；
2), steam explosion product is washed, hemicellulose is taken off, filtering is obtained the filtrate containing hemicellulose, containing cellulose
With the filter residue of lignin；
3), to step 2) in 1/2 filtrate that obtains add ethanol, soluble hemicellulose precipitation, filtering obtains half fiber
Element, 1/2 filtrate adds acid for adjusting pH to 5.5, and hydrolysis produces monose；
4), by step 2) obtain filter residue ethanol boiling, filtering, obtain the filtrate containing ethanol and lignin, contain
The filter residue of cellulose；
5), by step 4) obtain filtrate in acid condition with step 2) obtain monose graft copolymerization, filtering, filter residue
It is lignin copolymer, acid, return to step 3 is contained in filtrate) for hydrolyzing, wherein, filtrate is 25 with the weight ratio of monose：6；
6), by step 5) obtain lignin copolymer, step 4) obtain cellulose, step 3) obtain hemicellulose
And starch carries out mixing and obtains dietary fiber, and pH is adjusted to 5.0 with sodium carbonate or sodium acid carbonate, wherein, lignin copolymer,
The mixed proportion of cellulose, hemicellulose and starch is 1:1.5:1.8:2.8.
Embodiment 4：
The method that acid steam puffed stalk prepares dietary fiber, comprises the following steps：
1), stalk adds watery hydrochloric acid or dilute sulfuric acid to carry out steam explosion at 120 DEG C and obtains steam explosion product；Wherein, watery hydrochloric acid or
The ratio of dilute sulfuric acid and stalk is 1：1.3；
2), steam explosion product is washed, hemicellulose is taken off, filtering is obtained the filtrate containing hemicellulose, containing cellulose
With the filter residue of lignin；
3), to step 2) in 1/2 filtrate that obtains add ethanol, soluble hemicellulose precipitation, filtering obtains half fiber
Element, 1/2 filtrate adds acid for adjusting pH to 5.5, and hydrolysis produces monose；
4), by step 2) obtain filter residue ethanol boiling, filtering, obtain the filtrate containing ethanol and lignin, contain
The filter residue of cellulose, modified cellulose is prepared into by portion of cellulose using prior art；
5), by step 4) obtain filtrate in acid condition with step 2) obtain monose graft copolymerization, filtering, filter residue
It is lignin copolymer, acid, return to step 3 is contained in filtrate) for hydrolyzing, wherein, filtrate is 25 with the weight ratio of monose：6；
6), by step 5) obtain lignin copolymer, step 4) obtain cellulose and modified cellulose, step 3) obtain
The hemicellulose and starch for obtaining carry out mixing and obtain dietary fiber, and pH is adjusted to 5.0 with sodium carbonate or sodium acid carbonate, wherein,
The mixed proportion of lignin copolymer, cellulose, hemicellulose, modified cellulose and starch is 1:1.5:1.8：1.5:2.8.
Embodiment 5：
The method that acid steam puffed stalk prepares dietary fiber, comprises the following steps：
1), stalk adds watery hydrochloric acid or dilute sulfuric acid to carry out steam explosion at 120 DEG C and obtains steam explosion product；Wherein, watery hydrochloric acid or
The ratio of dilute sulfuric acid and stalk is 1：1.3；
2), steam explosion product is washed, hemicellulose is taken off, filtering is obtained the filtrate containing hemicellulose, containing cellulose
With the filter residue of lignin；
3), to step 2) in 1/2 filtrate that obtains add ethanol, soluble hemicellulose precipitation, filtering obtains half fiber
Element, 1/2 filtrate adds acid for adjusting pH to 5.5, and hydrolysis produces monose；
4), by step 2) obtain filter residue ethanol boiling, filtering, obtain the filtrate containing ethanol and lignin, contain
The filter residue of cellulose, modified cellulose is prepared into by portion of cellulose using prior art；
5), by step 4) obtain filtrate in acid condition with step 2) obtain monose graft copolymerization, filtering, filter residue
It is lignin copolymer, acid, return to step 3 is contained in filtrate) for hydrolyzing, wherein, filtrate is 25 with the weight ratio of monose：6；
6), by step 5) obtain lignin copolymer, step 4) obtain cellulose and modified cellulose, step 3) obtain
The hemicellulose and starch for obtaining carry out mixing and obtain dietary fiber, and pH is adjusted to 5.0 with sodium carbonate or sodium acid carbonate, wherein,
The mixed proportion of lignin copolymer, cellulose, hemicellulose, modified cellulose and starch is 1:1.5:1.8：1.8:2.8.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (7)
1. the method that acid steam puffed stalk prepares dietary fiber, it is characterised in that comprise the following steps：
1), stalk adds watery hydrochloric acid or dilute sulfuric acid to carry out steam explosion at 100-150 DEG C and obtains steam explosion product；
2), steam explosion product is washed, hemicellulose is taken off, filtering is obtained the filtrate containing hemicellulose, containing cellulose and wood
The filter residue of quality；
3), to step 2) in 1/2 filtrate that obtains add ethanol, soluble hemicellulose precipitation, filtering obtains hemicellulose, 1/2
Filtrate adds acid for adjusting pH to 5.0-5.5, and hydrolysis produces monose；
4), by step 2) obtain filter residue ethanol boiling, filtering, obtain the filtrate containing ethanol and lignin, contain fiber
The filter residue of element；
5), by step 4) obtain filtrate in acid condition with step 2) obtain monose graft copolymerization, filtering, filter residue for wood
Quality copolymer, contains acid, return to step 3 in filtrate) for hydrolyzing；
6), by step 5) obtain lignin copolymer, step 4) obtain cellulose, step 3) obtain hemicellulose and
Starch carries out mixing and obtains dietary fiber.
2. the method that acid steam puffed stalk according to claim 1 prepares dietary fiber, it is characterised in that the acid is salt
Acid, step 5) in acid condition be pH value be 5.0-6.0.
3. the method that acid steam puffed stalk according to claim 1 prepares dietary fiber, it is characterised in that step 1) in it is dilute
The ratio of hydrochloric acid or dilute sulfuric acid and stalk is 1：1-1.5.
4. the method that acid steam puffed stalk according to claim 1 prepares dietary fiber, it is characterised in that step 5) middle filter
Liquid is 20-30 with the weight ratio of monose：5-8.
5. the method that acid steam puffed stalk according to claim 1 prepares dietary fiber, it is characterised in that step 6) middle use
Sodium carbonate or sodium acid carbonate regulation pH to 4.5-6.0.
6. the method that acid steam puffed stalk according to claim 1 prepares dietary fiber, it is characterised in that step 6) in wood
The mixed proportion of quality copolymer, cellulose, hemicellulose and starch is 1:1.3-1.8:1.5-2.0:2.5-3.0.
7. the method that acid steam puffed stalk according to claim 1 prepares dietary fiber, it is characterised in that by step 4) obtain
Obtain cellulose and be prepared into modified cellulose, the mixing of lignin copolymer, cellulose, hemicellulose, modified cellulose and starch
Ratio is 1:1.3-1.8:1.5-2.0:1.5-1.8：2.5-3.0.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112010986A (en) * | 2020-09-21 | 2020-12-01 | 齐鲁工业大学 | Preparation method of resistant dextrin |
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| CN101748156A (en) * | 2009-12-25 | 2010-06-23 | 陈福库 | Comprehensive utilization method of soybean straws for producing fuel ethanol, lignin and marsh gas |
| CN102268833A (en) * | 2011-07-26 | 2011-12-07 | 中国科学院过程工程研究所 | Method for preparing dissolving pulp by carrying out steam explosion on crop straw and adopting prehydrolytic sulfate process |
| CN105431466A (en) * | 2013-06-26 | 2016-03-23 | 植物材料工业公司 | Phenolic resin obtained by polycondensation of formaldehyde, phenol and lignin |
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| CN112010986A (en) * | 2020-09-21 | 2020-12-01 | 齐鲁工业大学 | Preparation method of resistant dextrin |
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