CN105540807B - A kind of dendroid cellulose base both sexes flocculating decoloring agent and preparation method thereof - Google Patents
A kind of dendroid cellulose base both sexes flocculating decoloring agent and preparation method thereof Download PDFInfo
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- CN105540807B CN105540807B CN201610059898.9A CN201610059898A CN105540807B CN 105540807 B CN105540807 B CN 105540807B CN 201610059898 A CN201610059898 A CN 201610059898A CN 105540807 B CN105540807 B CN 105540807B
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- cellulosic material
- decoloring agent
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 41
- 230000003311 flocculating effect Effects 0.000 title claims abstract description 40
- 229920002678 cellulose Polymers 0.000 title claims abstract description 33
- 239000001913 cellulose Substances 0.000 title claims abstract description 33
- 241000555268 Dendroides Species 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 36
- 229920002873 Polyethylenimine Polymers 0.000 claims abstract description 28
- 239000002585 base Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- JQWHASGSAFIOCM-UHFFFAOYSA-M sodium periodate Chemical compound [Na+].[O-]I(=O)(=O)=O JQWHASGSAFIOCM-UHFFFAOYSA-M 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 15
- 238000005189 flocculation Methods 0.000 claims abstract description 8
- 230000016615 flocculation Effects 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- 150000004753 Schiff bases Chemical group 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims abstract description 5
- ZNZYKNKBJPZETN-WELNAUFTSA-N Dialdehyde 11678 Chemical compound N1C2=CC=CC=C2C2=C1[C@H](C[C@H](/C(=C/O)C(=O)OC)[C@@H](C=C)C=O)NCC2 ZNZYKNKBJPZETN-WELNAUFTSA-N 0.000 claims abstract description 4
- 238000013019 agitation Methods 0.000 claims description 16
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 12
- 229920001131 Pulp (paper) Polymers 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 11
- 239000012153 distilled water Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 9
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 7
- 241000209094 Oryza Species 0.000 claims description 7
- 235000007164 Oryza sativa Nutrition 0.000 claims description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 7
- 235000009566 rice Nutrition 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 3
- 210000000988 bone and bone Anatomy 0.000 claims 1
- KHIWWQKSHDUIBK-UHFFFAOYSA-N periodic acid Chemical compound OI(=O)(=O)=O KHIWWQKSHDUIBK-UHFFFAOYSA-N 0.000 claims 1
- 238000011282 treatment Methods 0.000 abstract description 5
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- 238000004043 dyeing Methods 0.000 abstract 1
- 239000005995 Aluminium silicate Substances 0.000 description 7
- 235000012211 aluminium silicate Nutrition 0.000 description 7
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 7
- 238000004042 decolorization Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000008394 flocculating agent Substances 0.000 description 6
- 229920003123 carboxymethyl cellulose sodium Polymers 0.000 description 5
- 229940063834 carboxymethylcellulose sodium Drugs 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- IQFVPQOLBLOTPF-HKXUKFGYSA-L congo red Chemical compound [Na+].[Na+].C1=CC=CC2=C(N)C(/N=N/C3=CC=C(C=C3)C3=CC=C(C=C3)/N=N/C3=C(C4=CC=CC=C4C(=C3)S([O-])(=O)=O)N)=CC(S([O-])(=O)=O)=C21 IQFVPQOLBLOTPF-HKXUKFGYSA-L 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 150000002466 imines Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000001044 red dye Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G83/00—Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00
- C08G83/002—Dendritic macromolecules
- C08G83/003—Dendrimers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Paper (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of dendroid cellulose base both sexes flocculating decoloring agents and preparation method thereof.Mainly using cellulosic material as molecular skeleton, and form dialdehyde cellulose using sodium periodate oxidation cellulosic material, then grafting polyethylene imine is bonded with amino progress schiff base structure using aldehyde radical to be formed, addition cellulosic material, sodium metaperiodate and polyethyleneimine successively are carried out using water as solvent to be prepared, the mass ratio by changing cellulosic material and polyethyleneimine regulates and controls the surface charge properties and active site of the flocculating decoloring agent.It is flocculation performance height of the present invention, effect stability, environmental-friendly, there is efficient application in papermaking, printing and dyeing, containing Complex water bodies purified treatments such as heavy metals.
Description
Technical field
The present invention relates to water treatment engineering technology field, more particularly to a kind of dendroid cellulose base both sexes flocculating decoloring agent
And preparation method thereof.
Background technology
In recent years, as people are to the pay attention to day by day of environmental problem, environmental pollution treatment new technology is rapidly developed.Its
In, flocculation decoloration technology have many advantages, such as it is economical, efficient, especially removing particulate matter, dyestuff, heavy metal etc. always
It is concerned.
Currently used flocculating decoloring agent mainly have using aluminium salt and molysite as the inorganic polymer flocculating decoloring agent of representative and
Using the polyacrylamide of artificial chemistry synthesis as the organic polymer flocculating decoloring agent of representative.Although inorganic flocculating agent price is low
It is honest and clean, but it is formed by that floccule body is smaller, and treatment effect is unstable, and application conditions range is small；Although and organic synthesis flocculant
Product stability is good, flocculating effect is good, but the high polymer coagulant there are synthesis cost height, monomer harm greatly and after use
It is difficult to, by environment degradable, have human body and environment potentially hazardous.In addition, industrial and agricultural wastewater complicated component, existing flocculant
It is difficult to effectively remove complicated and diversified pollutant in waste water.Therefore, efficient stable, the decoloration of environmental-friendly novel flocculation are developed
Agent becomes one of the research hotspot of current water environment process field.
Invention content
That there are application ranges to overcome the prior art is small, treatment effect is bad, to environment and human body, there are potential hazards etc.
Problem, the present invention provides a kind of dendroid cellulose base both sexes flocculating decoloring agent and preparation method thereof, flocculation performance height, effects
It is stable, environmental-friendly, while providing a kind of new way for the high-valued comprehensive utilization of cellulose renewable resource.
To achieve the above object, technical solution of the invention is：
One, a kind of dendroid cellulose base both sexes flocculating decoloring agent：
As shown in Figure 1, mainly to contain cellulosic material as molecular skeleton, oxidation is carried out on cellulosic material and is made
The dendritic flocculating decoloring agent is prepared in dialdehyde cellulose key and grafting polyethylene imine, and the supermolecule of Fig. 1 only carries
For an example.
The cellulosic material is using sodium carboxymethylcellulose or cellulose powder, the discarded paper pulp dregs of rice, wood pulps, cotton pulp
One kind in the cellulosic material in the sources such as the dregs of rice.
The flocculating decoloring agent is to utilize aldehyde radical and amino after being aoxidized as molecular skeleton using cellulosic material using water as solvent
The polyethyleneimine for forming schiff base structure bonding grafting different molecular weight is prepared.
Two, a kind of preparation method of dendroid cellulose base both sexes flocculating decoloring agent：
By using water as solvent, using cellulosic material as molecular skeleton, first with sodium periodate oxidation cellulosic material shape
At dialdehyde cellulose, recycles aldehyde radical to be bonded on grafting polyethylene imine with amino formation schiff base structure and dendroid is prepared
The flocculating decoloring agent, and the mass ratio by changing cellulosic material and polyethyleneimine regulates and controls the flocculating decoloring agent
Surface charge properties and active site.
Preparation method specifically comprises the following steps：
1) by cellulosic material be added distilled water in, magnetic agitation under normal temperature condition, obtain uniform cellulosic suspensions or
Solution；
2) sodium metaperiodate is added under magnetic agitation effect in step 1) obtained cellulosic suspensions or solution, 35~
120~300min is aoxidized at 75 DEG C；
3) it then adds the polyethyleneimine that molecular weight is 600~10000 and carries out graft reaction, reaction time 120
~240min obtains uniform solution；
4) solution that step 3) obtains is added in the absolute ethyl alcohol of 5 times of volumes, by mixture with 8000rpm rotating speeds from
Heart 5min collects sediment, is dried to get cellulose base both sexes flocculating decoloring agent described in dendroid through centrifuge washing.
The mass ratio of cellulosic material and distilled water is 1 in the step 1):80~120；It is added in the step 2)
Sodium metaperiodate and the mass ratio of raw fibre cellulosic material are 0.5~4:1；The polyethyleneimine and raw material being added in the step 3)
The mass ratio of cellulosic material is 0.5~3:1.
The cellulosic material is sodium carboxymethylcellulose or cellulose powder, the discarded paper pulp dregs of rice, wood pulps, Cotton Pulp
One kind in the cellulosic material in equal sources.
Possessed advantageous effect is the present invention compared with prior art：
1. having a wide range of application, flocculation decoloration efficiency height：Using oxidative grafting technology, introduced on cellulosic molecule skeleton poly-
Aziridine obtains dendritic cellulose base flocculating decoloring agent.By the quality for changing polyethyleneimine and cellulosic material
Than its application range to Complex water body can be expanded with Effective Regulation flocculating decoloring agent surface electrical behavior；Dendroid flocculating decoloring agent
There are a large amount of active sites on surface, generate " enlarge-effect ", the pollutant in the removing water body that quick, large capacity can flocculate.
2. synthetic method is simple：Using water as solvent in reaction process, cellulosic material is oxidized to two using sodium metaperiodate
It after aldehyde cellulose, is bonded using schiff base structure with polyethyleneimine, and is purified without multi-stage separation at a lower temperature, prepared
It is simple for process, it is easy to accomplish industrialized production.
3. environmental-friendly：Using cellulose and polyethyleneimine as raw material, pass through the dendroid cellulose of simple process preparation
Base both sexes flocculation decoloration material is biodegradable, not will produce harmful substance, does not have secondary pollution to environment.
Description of the drawings
Fig. 1 is the supramolecular structured of the flocculating decoloring agent that the present invention is prepared using sodium carboxymethylcellulose as cellulosic material
Structure schematic diagram.
Fig. 2 is turbidity-time graph that flocculating decoloring agent prepared by Examples 1 to 5 handles kaolin solution.
Fig. 3 is the Zeta potential figure of the flocculating decoloring agent of the preparation of embodiment 3 at various ph values.
Fig. 4 is the percent of decolourization figure that flocculating decoloring agent prepared by embodiment 3 handles Congo red solution.
Specific implementation mode
Further to illustrate the technological means and advantage of the invention taken, below in conjunction with the implementation of the present invention
Example and its attached drawing are specifically described.
The embodiment of the present invention is as follows：
Embodiment 1：
(1) 0.5g sodium carboxymethylcelluloses are added in 40mL distilled water, magnetic agitation under room temperature obtains uniform, transparent
Carboxymethylcellulose sodium solution；
(2) 0.25g sodium metaperiodates are added to the carboxymethylcellulose sodium solution that step (1) obtains under magnetic agitation effect
In, aoxidize 120min at 35 DEG C；It is then 0.5 according to the mass ratio of polyethyleneimine and sodium carboxymethylcellulose:1, it is added
The polyethyleneimine that molecular weight is 600, graft reaction 120min obtain uniform, transparent solution；
(3) solution that step (2) obtains is added in the absolute ethyl alcohol of 5 times of volumes, mixture 8000rpm is centrifuged
5min collects sediment, is dried to get dendritic cellulose base amphoteric flocculating agent through centrifuge washing.
Flocculating decoloring agent manufactured in the present embodiment forms a concentration of 2g/L solution, and different surfaces is presented at different pH
Charge characteristic as shown in figure 3, its Zeta potential range in -60~10mV, to the turbidity removal of the kaolin solution of 500mg/L
Rate reaches 75.4%, reaches 90% to the percent of decolourization of the acid red dye of 100ppm.
Embodiment 2：
(1) the 0.5g paper pulp dregs of rice are added in 50mL distilled water, magnetic agitation under room temperature, it is outstanding obtains finely dispersed cellulose
Liquid；
(2) 0.5g sodium metaperiodates are added under magnetic agitation effect in the cellulosic suspensions that step (1) obtains, at 50 DEG C
Lower oxidation 120min；It is then 1 according to the mass ratio of polyethyleneimine and the paper pulp dregs of rice:1, the polyethylene that molecular weight is 3000 is added
Imines, graft reaction 150min obtain uniform, transparent solution；
(3) solution that step (2) obtains is added in the absolute ethyl alcohol of 5 times of volumes, mixture 8000rpm is centrifuged
5min collects sediment, is dried to get dendritic cellulose base amphoteric flocculating agent through centrifuge washing.
Flocculating decoloring agent manufactured in the present embodiment forms a concentration of 2g/L solution, and different surfaces is presented at different pH
Charge characteristic as shown in figure 3, its Zeta potential range in -45~20mV, to the turbidity removal of the kaolin solution of 500mg/L
Rate reaches 85.8%, reaches 92.93% to the percent of decolourization of the active red dye of 100ppm.
Embodiment 3：
(1) 0.5g wood pulps are added in 60mL distilled water, magnetic agitation under room temperature, it is outstanding obtains finely dispersed cellulose
Liquid；
(2) 0.5g sodium metaperiodates are added under magnetic agitation effect in the cellulosic suspensions that step (1) obtains, at 50 DEG C
Lower oxidation 180min；It is then 2 according to the mass ratio of polyethyleneimine and Cotton Pulp:1, the polyethylene that molecular weight is 3500 is added
Imines, graft reaction 180min obtain uniform cellulosic suspensions；
(3) solution that step (2) obtains is added in the absolute ethyl alcohol of 5 times of volumes, mixture 8000rpm is centrifuged
5min collects sediment, is dried to get dendritic cellulose base amphoteric flocculating agent through centrifuge washing.
Flocculating decoloring agent manufactured in the present embodiment forms a concentration of 2g/L solution, and different surfaces is presented at different pH
Charge characteristic as shown in figure 3, its Zeta potential range in -35~30mV, to the turbidity removal of the kaolin solution of 500mg/L
Rate reaches 98.8%, reaches 97% to the percent of decolourization of the congo red of 100ppm, decolorizing effect is as shown in Figure 4.
Embodiment 4：
(1) 1g sodium carboxymethylcelluloses are added in 120mL distilled water, magnetic agitation under room temperature obtains uniform, transparent
Carboxymethylcellulose sodium solution；
(2) 2g sodium metaperiodates are added under magnetic agitation effect in the carboxymethylcellulose sodium solution that step (1) obtains,
240min is aoxidized at 60 DEG C；It is then 3 according to the mass ratio of polyethyleneimine and sodium carboxymethylcellulose:1, molecular weight is added
For 10000 polyethyleneimine, graft reaction 240min obtains uniform, transparent carboxymethylcellulose sodium solution；
(3) solution that step (2) obtains is added in the absolute ethyl alcohol of 5 times of volumes, mixture 8000rpm is centrifuged
5min collects sediment, is dried to get dendritic cellulose base amphoteric flocculating agent through centrifuge washing.
Flocculating decoloring agent manufactured in the present embodiment forms a concentration of 2g/L solution, and different surfaces is presented at different pH
Charge characteristic as shown in figure 3, its Zeta potential range in -15~45mV, to the turbidity removal of the kaolin solution of 500mg/L
Rate reaches 97.6%, reaches 89.97% to the percent of decolourization of the golden dye of 100ppm.
Embodiment 5：
(1) 1g Cotton Pulps are added in 120mL distilled water, magnetic agitation under room temperature, it is outstanding obtains finely dispersed cellulose
Liquid；
(2) 4g sodium metaperiodates are added under magnetic agitation effect in the cellulosic suspensions that step (1) obtains, at 75 DEG C
Aoxidize 300min；It is then 4 according to the mass ratio of polyethyleneimine and Cotton Pulp:1, the polyethyleneimine that molecular weight is 600 is added
Amine, graft reaction 240min obtain uniform cellulosic suspensions；
(3) solution that step (2) obtains is added in the absolute ethyl alcohol of 5 times of volumes, mixture 8000rpm is centrifuged
5min collects sediment, is dried to get dendritic cellulose base amphoteric flocculating agent through centrifuge washing.
Flocculating decoloring agent manufactured in the present embodiment forms a concentration of 2g/L solution, and different surfaces is presented at different pH
Charge characteristic as shown in figure 3, its Zeta potential range in -10~60mV, to the turbidity removal of the kaolin solution of 500mg/L
Rate reaches 89.1%, reaches 90.57% to the percent of decolourization of the Eosin Dye Y of 100ppm.
It is right after the flocculating decoloring agent that above-described embodiment 1,2,3,4,5 prepares forms the 1mL solution of a concentration of 2g/L
The kaolin solution of a concentration of 500g/L of 100mL is handled, and with verification the verifying results, finally obtains turbidity-time graph such as Fig. 2 institutes
Show.
It can be seen that the present invention utilizes oxidative grafting technology, polyethyleneimine is introduced on cellulosic molecule skeleton, obtained fibre
The plain base flocculating decoloring agent flocculation decoloration efficiency of dimension is high, and obvious technical effects protrude, and can Effective Regulation surface electrical behavior, simply have
It imitates pollution-free.
Listed above is only specific embodiments of the present invention.It is clear that the invention is not restricted to which above embodiment, may be used also
With there are many deformations.All changes that those skilled in the art directly can export or associate from present disclosure
Shape is considered as protection scope of the present invention.
Claims (4)
1. a kind of dendroid cellulose base both sexes flocculating decoloring agent, it is characterised in that：Mainly using cellulosic material as molecule bone
Frame is grafted with polyethyleneimine by schiff base structure；
The cellulosic material is using sodium carboxymethylcellulose or cellulose powder, the discarded paper pulp dregs of rice, wood pulps, Cotton Pulp
One kind in cellulosic material；
The dendroid cellulose base both sexes flocculating decoloring agent is prepared in the following ways：
1）Cellulosic material is added in distilled water, magnetic agitation under normal temperature condition obtains uniform cellulosic suspensions or solution；
2）Step 1 is added under magnetic agitation effect in sodium metaperiodate）In obtained cellulosic suspensions or solution, at 35 ~ 75 DEG C
120 ~ 300 min of lower oxidation；
3）It then adds the polyethyleneimine that molecular weight is 600 ~ 10000 and carries out graft reaction, the reaction time is 120 ~ 240
Min obtains uniform solution；
4）By step 3）Obtained solution is added in the absolute ethyl alcohol of 5 times of volumes, and mixture is centrifuged with 8000 rpm rotating speeds
5 min collect sediment, are dried to get cellulose base both sexes flocculating decoloring agent described in dendroid through centrifuge washing.
2. a kind of dendroid cellulose base both sexes flocculating decoloring agent according to claim 1, it is characterised in that：The flocculation
Decolorising agent is to form schiff base structure key using aldehyde radical and amino after being aoxidized as molecular skeleton using cellulosic material using water as solvent
Grafting polyethylene imine is closed to be prepared.
3. a kind of preparation method of dendroid cellulose base both sexes flocculating decoloring agent, it is characterised in that：By using water as solvent, with
Cellulosic material is molecular skeleton, first with sodium periodate oxidation cellulosic material formed dialdehyde cellulose, recycle aldehyde radical with
Amino forms schiff base structure grafting polyethylene imine and the dendritic flocculating decoloring agent is prepared, and by changing fiber
The mass ratio of cellulosic material and polyethyleneimine regulates and controls the surface charge properties and active site of the flocculating decoloring agent；
The method specifically comprises the following steps：
1）Cellulosic material is added in distilled water, magnetic agitation under normal temperature condition obtains uniform cellulosic suspensions or solution；
2）Step 1 is added under magnetic agitation effect in sodium metaperiodate）In obtained cellulosic suspensions or solution, at 35 ~ 75 DEG C
120 ~ 300 min of lower oxidation；
3）It then adds the polyethyleneimine that molecular weight is 600 ~ 10000 and carries out graft reaction, the reaction time is 120 ~ 240
Min obtains uniform solution；
4）By step 3）Obtained solution is added in the absolute ethyl alcohol of 5 times of volumes, and mixture is centrifuged with 8000 rpm rotating speeds
5 min collect sediment, are dried to get cellulose base both sexes flocculating decoloring agent described in dendroid through centrifuge washing；
The cellulosic material is using sodium carboxymethylcellulose or cellulose powder, the discarded paper pulp dregs of rice, wood pulps, Cotton Pulp
One kind in cellulosic material.
4. a kind of preparation method of dendroid cellulose base both sexes flocculating decoloring agent according to claim 3, feature exist
In：The step 1）The mass ratio of middle cellulosic material and distilled water is 1:80~120；The step 2）The periodic acid of middle addition
Sodium and the mass ratio of raw fibre cellulosic material are 0.5 ~ 4:1；The step 3）The polyethyleneimine and raw cellulose of middle addition
The mass ratio of material is 0.5 ~ 3:1.
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| CN201610059898.9A CN105540807B (en) | 2016-01-28 | 2016-01-28 | A kind of dendroid cellulose base both sexes flocculating decoloring agent and preparation method thereof |
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| CN201610059898.9A CN105540807B (en) | 2016-01-28 | 2016-01-28 | A kind of dendroid cellulose base both sexes flocculating decoloring agent and preparation method thereof |
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|---|---|---|---|---|
| CN106587296A (en) * | 2016-11-28 | 2017-04-26 | 浙江理工大学 | Bamboo pulp cellulose based flocculation decolorization composite functional material and preparation method thereof |
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