CN106637460A - A process of producing a cellulose carbamate fiber filament - Google Patents
A process of producing a cellulose carbamate fiber filament Download PDFInfo
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- CN106637460A CN106637460A CN201510592476.3A CN201510592476A CN106637460A CN 106637460 A CN106637460 A CN 106637460A CN 201510592476 A CN201510592476 A CN 201510592476A CN 106637460 A CN106637460 A CN 106637460A
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Abstract
The invention relates to a process of producing a cellulose carbamate fiber filament, and belongs to the technical field of cellulose carbamate fiber production. Through specific cellulose activation, cellulose carbamate preparation, cellulose carbamate solution preparation, and spinning steps, a complete cellulose carbamate fiber filament producing process having a high degree of completion is formed. A prepared spinning stock solution has good spinnability, a final product has good performance, the process is particularly suitable for industrial large-scale production, and the production cost, the production efficiency and product quality are all taken into account.
Description
Technical field
The present invention relates to a kind of technique for producing regenerated celulose fibre long filament, it is more particularly related to a kind of technique for producing cellulose carbamate fibre long filament, belongs to cellulose carbamate fibre production technical field.
Background technology
Cellulose fibre is the chemical fibre made by as raw material of constantly regenerating natural fiber with nature.The production of cellulose fibre now is mainly viscose process, and the product produced is viscose rayon.
Viscose rayon is one kind of regenerated celulose fibre, is to put into one of chemical fibre of industrialized production earliest.The good hygroscopicity of viscose rayon, comfortable and easy to wear, spinnability is excellent, Chang Yumian, hair or various synthetic fibers blending, intertexture, for all kinds of clothes and decorative textile product.The high tenacity staple fibre prepared using different raw material and spinning technique, can be used for the industrial goods such as tire cord, conveyer belt.At present China is the big producing country of viscose rayon first, but at present state's cellulose fibres overwhelming majority is also according to traditional old technique productions, viscose glue is made including operations such as dipping, squeezing, crushing, aging, yellow, dissolving, maturation, filtration, deaerations, then viscose rayon is made by wet spinning.
In viscose rayon traditional handicraft, the yellowing processes of cellulose will expend substantial amounts of carbon disulfide, and also give off the hydrogen sulfide of suitable share and irretrievable carbon disulfide in spinning phase, and to environment sizable pollution can be caused.In addition, traditional viscose process high cost, time-consuming for production technology, causes to spend big, and production efficiency is not but high.
Therefore, the research of viscose rayon technique is increasingly turned in recent years it is environmentally friendly and can improve production efficiency, reduce coming on the novel process of production cost, and generate some new forming techniques.Because cellulose elementary cell has three hydroxyls, it is readily formed intramolecular and intermolecular hydrogen bonding, degree of crystallinity is very high, so cellulose is difficult to be dissolved in general inorganic and organic solvent, needs using special solvent or by its derivatization is modified to be just easy to processing and utilize.Cellulose derivatization mainly includes esterification, etherificate and graft copolymerization etc..Wherein, cellulose generates cellulose carbamate with urea reaction, process is relatively simple, good spinning property, environmental pollution is little, the fabric function admirable of gained, and urea abundance and nontoxic, price is also relatively cheap, and product cellulose carbamate is stable in properties, can store under ambient temperature and moisture environment for a long time.
State Intellectual Property Office discloses Publication No. CN104072622A in 2014.10.1, the invention of entitled " preparation of cellulose carbamate and its dissolution in low temperature spinning process ", a kind of preparation of cellulose carbamate of the disclosure of the invention and its dissolution in low temperature spinning process, cellulose is added into sodium hydroxide solution, stir and soak, then cellulose is taken out and is washed to neutrality, obtain alkalinized celluloses, add urea, stir, it is put into baking oven and heats, react and be dried, obtain cellulose carbamate, cellulose carbamate is ground into powder to be added in mixing kettle, and add NaOH, thiocarbamide, the double solvents of deionized water, it is uniformly mixed；Raw material in mixing kettle is sprayed after extrusion, deaeration, filtration by the spinneret orifice of spinneret, sequentially enter and solid is frozen into the first coagulating tank and the second gelation groove, then stretch, be wound in cellulose carbamate fibre by filament spinning component after tank washing.
Above invention discloses cellulose and prepare cellulose carbamate as raw material with urea, cellulose carbamate solution, all processes of last spinning are then prepared again.But, the process is simultaneously suitably applied industrialization large-scale production, and the spinning solution spinnability of preparation is poor, and spinning technique through corresponding optimization, does not also cause final products performance not good.
State Intellectual Property Office discloses Publication No. CN101597336 in 2009.12.9, the invention of entitled " microwave synthesis method of cellulose carbamate ", a kind of technology of microwave heating synthesis method of fiber carbamate of the disclosure of the invention.Its method is cellulose to be immersed in aqueous solution of urea to make it fully adsorb urea first, and filters, is dried to obtain the homogeneous mixture of cellulose/urea.Then cellulose/urea admixture is placed in into heating response in micro-wave oven and cellulose carbamate is obtained.The solvent-free pollution of cellulose carbamate synthetic technology provided by the present invention, it is not necessary to add organic solvent and any catalyst, reaction speed is fast, and energy consumption is low.Synthesized cellulose carbamate product has good dissolubility in the range of -10～5 DEG C in 6～10wt%NaOH aqueous solution, can prepare concentrated solution that is stable, transparent and being suitable for industrial spinning and masking.
State Intellectual Property Office discloses Publication No. CN102691125A in 2012.9.26, the invention of entitled " a kind of method that regenerated celulose fibre is prepared by cellulose carbamate ", the invention is related to a kind of method for preparing regenerated celulose fibre by cellulose carbamate, the method is that cellulose carbamate is dissolved with a kind of solvent compositions, and solvent compositions are the NaOH containing 6～10wt%, the aqueous solution of 0.1～3wt% zinc oxide.A certain amount of cellulose carbamate is dispersed in the solvent compositions, less than -10 DEG C are refrigerated under cryogenic conditions, take out and thawed under conditions of not higher than 50 DEG C, carry out wet spinning, strand obtains regenerated celulose fibre through solidification, washing, after being dried.Cellulose carbamate dissolving difficulty and unstable this two hang-up of solution in conventional technique are this method solved, is worth with very high industrial applications.
State Intellectual Property Office discloses Publication No. CN103980368A in 2014.8.13, the invention of entitled " a kind of method that liquid and solid phase reaction prepares cellulose carbamate ", the invention using cellulose pulp or through the cellulose pulp and urea of activation process be raw material, the higher boiling such as dimethylformamide (DMF) or dimethyl acetamide (DMAc), dimethyl sulfoxide (DMSO) (DMSO), 1-METHYLPYRROLIDONE (NMP) is non-proton and intensive polar solvent in carry out esterification synthesis method of fiber carbamate.Liquid and solid phase reaction method is prepared during cellulose carbamate, from solvent toxicity is little, easy recovery, make preparation process easy, environmental protection, safely and controllably, prepared cellulose carbamate can be dissolved in NaOH solution and form good stable solution, can be used for the preparation of regenerated celulose fibre or film etc..
Above-mentioned three patents are directed to some of whole cellulose carbamate fibre production link and step, but are all not involved with whole technical process, it is impossible to realize industrialization large-scale production.
The content of the invention
Present invention seek to address that the technique of existing production cellulose carbamate fibre cannot adapt to industrialize the problem of large-scale production, a kind of technique for producing cellulose carbamate fibre long filament is provided, the method is adapted to industrialization large-scale production, the spinning solution good spinnability of preparation, final products performance is good.
In order to realize foregoing invention purpose, its specific technical scheme is as follows：
A kind of technique for producing cellulose carbamate fibre long filament, it is characterised in that：Comprise the following steps that：
The activation of A, cellulose
First cellulose is added in sodium hydroxide solution and is soaked so as to activated, then washing obtains activated cellulose；
The preparation of B, cellulose carbamate
Urea and atent solvent are added in activated cellulose, then it is heated, carry out esterification, obtain cellulose carbamate；
The preparation of C, cellulose carbamate solution
Cellulose carbamate is added in solution of the NaOH with zinc oxide, 3～6h of freezing reaction, after the completion of reaction, rises to normal temperature and obtain cellulose carbamate solution, i.e. spinning solution at -5～-15 DEG C；
D, spinning
Spinning solution in step C is made into cellulose carbamate fibre long filament by wet spinning.
In step, described cellulose is bamboo pulp that the degree of polymerization is 500～900 to the present invention.
In step, the mass concentration of described sodium hydroxide solution is 16～20% to the present invention, and cellulose is 1 with the solid-to-liquid ratio of sodium hydroxide solution:(4～6).
In step, the temperature of described immersion is 5～15 DEG C to the present invention, and soak time is 4～8h.
In stepb, described urea is the urea liquid of mass concentration 20～40% to the present invention, and urea is (2～4) with the mass ratio of activated cellulose:1.
In stepb, described atent solvent is DMA (DMAc) to the present invention, and atent solvent is (5～10) with the volume mass ratio of activated cellulose:1.
In stepb, the temperature of described heating is 140～160 DEG C to the present invention, and the heating response time is 1～3h.
In step C, in described NaOH and the solution of zinc oxide, the mass concentration of NaOH is 8～12% to the present invention, and the mass concentration of zinc oxide is 1～3%, and the mass concentration for dissolving the cellulose carbamate solution for obtaining is 6～8%.
In step D, in described spinning process, the composition and proportioning of coagulating bath are Na to the present invention2SO4
230～245g/L, ZnSO4
8～12g/L, H2SO4
110～140g/L.
The Advantageous Effects that the present invention brings：
1st, the present invention solves the problems, such as that the technique of existing production cellulose carbamate fibre cannot adapt to industrialization large-scale production.The present invention provides a kind of technique for producing cellulose carbamate fibre long filament, by specific processing step and technological parameter, form a higher intact fibre element carbamate fibre long filament production process of completeness, the spinning solution good spinnability of preparation, final products performance is good, industrialization large-scale production is especially suitable for, production cost, production efficiency and product quality is taken into account.
2nd, currently preferred, cellulose in step is bamboo pulp that the degree of polymerization is 500～900.Being selected to of above-mentioned raw materials and polymerization scope causes the mechanical strength of last fiber product big.
3rd, currently preferred, the mass concentration of sodium hydroxide solution in step is 16～20%, and cellulose is 1 with the solid-to-liquid ratio of sodium hydroxide solution:(4～6).Being selected to of above-mentioned special process parameter ensure that cellulose activation is uniform and activation after the degree of polymerization of cellulose can meet the intensity requirement of fiber, and ensure that there is enough alkali concns.
4th, currently preferred, the temperature of immersion in step is 5～15 DEG C, and soak time is 4～8h.In order to the selection for coordinating the polymerization scope of raw material, said temperature and time can make the degree of polymerization of cellulose be reduced to suitable scope, beneficial to the dissolving of cellulose carbamate.
5th, it is currently preferred, urea in stepb for mass concentration 20～40% urea liquid, urea is (2～4) with the mass ratio of activated cellulose:1.Above-mentioned specific process parameters range is chosen so that the cellulose carbamate of synthesis has suitable nitrogen content（2～4%）.
6th, currently preferred, atent solvent in stepb is DMA (DMAc), and atent solvent is (5～10) with the volume mass ratio of activated cellulose:1.DMAc solvents have certain activation to cellulose, and beneficial to cellulose and urea reaction, and water has relatively low azeotropic point with DMAc, and temperature-rise period can faster remove water, with intermolecular hydrogen bond action in weakening cellulosic molecule, accelerate the carrying out of esterification.
7th, currently preferred, the temperature of heating in stepb is 140～160 DEG C, and the heating response time is 1～3h.Above-mentioned specific heating-up temperature and heating response time ensure that heating is quick, uniform, reduce the energy consumption of course of reaction.
8th, currently preferred, in NaOH in step C and the solution of zinc oxide, the mass concentration of NaOH is 8～12%, and the mass concentration of zinc oxide is 1～3%, and the mass concentration for dissolving the cellulose carbamate solution for obtaining is 6～8%.The solubility for being selected to guarantee cellulose carbamate of above-mentioned special process parameter area is higher, can improve the dissolubility and stability of cellulose carbamate, and this concentration cellulose element carbamate solution has preferable spinnability.
9th, currently preferred, in spinning process in step D, the composition and proportioning of coagulating bath are Na2SO4
230～245g/L, ZnSO4
8～12g/L, H2SO4
110～140g/L.The selection of above-mentioned specific process parameters range is for cellulose carbamate solution（Spinning solution）Be optimized, cellulose carbamate can rapid shaping, the performance of final continuous yarn product is more preferable.
Specific embodiment
Embodiment
1
A kind of technique for producing cellulose carbamate fibre long filament, comprises the following steps that：
The activation of A, cellulose
First cellulose is added in sodium hydroxide solution and is soaked so as to activated, then washing obtains activated cellulose；
The preparation of B, cellulose carbamate
Urea and atent solvent are added in activated cellulose, then it is heated, carry out esterification, obtain cellulose carbamate；
The preparation of C, cellulose carbamate solution
Cellulose carbamate is added in solution of the NaOH with zinc oxide, freezing reaction 3h, after the completion of reaction, rises to normal temperature and obtain cellulose carbamate solution, i.e. spinning solution at -15 DEG C；
D, spinning
Spinning solution in step C is made into cellulose carbamate fibre long filament by wet spinning.
The cellulose carbamate fibre long filament similar nature that the above-mentioned techniques of Jing are prepared can meet the use requirement of viscose fiber filament in viscose fiber filament, and without residual sulphur, dye uniformity is better than viscose fiber filament.Additionally, the production process of cellulose carbamate fibre long filament does not use CS2, do not produce SO2、H2The toxic and harmfuls such as S, than viscose rayon environmental protection.
The index parameter of cellulose carbamate fibre long filament that this technique is prepared is shown in Table 1 with the index parameter of viscose fiber filament.
Table 1
| Project | Cellulose carbamate fibre | Viscose rayon |
| Dry fracture strength >= | 1.65 | 1.70 |
| Dry elongation at break >= | 19% | 18% |
| The dry extension at break coefficient of variation≤ | 8.0% | 10% |
| Line density deviation | ±2.0 | ±2.5 |
| The line density coefficient of variation≤ | 3.0% | 3.0% |
| Monofilament radical deviation≤ | 3.0 | 3.0% |
| Residual sulfur content (mg/100g)≤ | 0 | 10 |
| Dye uniformity (gray card level) >= | 4 | 3 |
Embodiment
2
A kind of technique for producing cellulose carbamate fibre long filament, comprises the following steps that：
The activation of A, cellulose
First cellulose is added in sodium hydroxide solution and is soaked so as to activated, then washing obtains activated cellulose；
The preparation of B, cellulose carbamate
Urea and atent solvent are added in activated cellulose, then it is heated, carry out esterification, obtain cellulose carbamate；
The preparation of C, cellulose carbamate solution
Cellulose carbamate is added in solution of the NaOH with zinc oxide, freezing reaction 6h, after the completion of reaction, rises to normal temperature and obtain cellulose carbamate solution, i.e. spinning solution at -5 DEG C；
D, spinning
Spinning solution in step C is made into cellulose carbamate fibre long filament by wet spinning.
Embodiment
3
A kind of technique for producing cellulose carbamate fibre long filament, comprises the following steps that：
The activation of A, cellulose
First cellulose is added in sodium hydroxide solution and is soaked so as to activated, then washing obtains activated cellulose；
The preparation of B, cellulose carbamate
Urea and atent solvent are added in activated cellulose, then it is heated, carry out esterification, obtain cellulose carbamate；
The preparation of C, cellulose carbamate solution
Cellulose carbamate is added in solution of the NaOH with zinc oxide, freezing reaction 4.5h, after the completion of reaction, rises to normal temperature and obtain cellulose carbamate solution, i.e. spinning solution at -10 DEG C；
D, spinning
Spinning solution in step C is made into cellulose carbamate fibre long filament by wet spinning.
Embodiment
4
A kind of technique for producing cellulose carbamate fibre long filament, comprises the following steps that：
The activation of A, cellulose
First cellulose is added in sodium hydroxide solution and is soaked so as to activated, then washing obtains activated cellulose；
The preparation of B, cellulose carbamate
Urea and atent solvent are added in activated cellulose, then it is heated, carry out esterification, obtain cellulose carbamate；
The preparation of C, cellulose carbamate solution
Cellulose carbamate is added in solution of the NaOH with zinc oxide, freezing reaction 5h, after the completion of reaction, rises to normal temperature and obtain cellulose carbamate solution, i.e. spinning solution at -8 DEG C；
D, spinning
Spinning solution in step C is made into cellulose carbamate fibre long filament by wet spinning.
Embodiment
5
On the basis of embodiment 1-4：
Preferably, in step, described cellulose is bamboo pulp that the degree of polymerization is 500.
Preferably, in step, the mass concentration of described sodium hydroxide solution is 16%, and cellulose is 1 with the solid-to-liquid ratio of sodium hydroxide solution:4.
Preferably, in step, the temperature of described immersion is 5 DEG C, and soak time is 4h.
Embodiment
6
On the basis of embodiment 1-4：
Preferably, in step, described cellulose is bamboo pulp that the degree of polymerization is 900.
Preferably, in step, the mass concentration of described sodium hydroxide solution is 20%, and cellulose is 1 with the solid-to-liquid ratio of sodium hydroxide solution:6.
Preferably, in step, the temperature of described immersion is 15 DEG C, and soak time is 8h.
Embodiment
7
On the basis of embodiment 1-4：
Preferably, in step, described cellulose is bamboo pulp that the degree of polymerization is 800.
Preferably, in step, the mass concentration of described sodium hydroxide solution is 18%, and cellulose is 1 with the solid-to-liquid ratio of sodium hydroxide solution:5.
Preferably, in step, the temperature of described immersion is 10 DEG C, and soak time is 6h.
Embodiment
8
On the basis of embodiment 1-4：
Preferably, in step, described cellulose is bamboo pulp that the degree of polymerization is 650.
Preferably, in step, the mass concentration of described sodium hydroxide solution is 19%, and cellulose is 1 with the solid-to-liquid ratio of sodium hydroxide solution:5.5.
Preferably, in step, the temperature of described immersion is 7 DEG C, and soak time is 7h.
Embodiment
9
On the basis of embodiment 1-4：
Preferably, in stepb, described urea is the urea liquid of mass concentration 20%, and urea is 2 with the mass ratio of activated cellulose:1.
Preferably, in stepb, described atent solvent is DMA, and atent solvent is 5 with the volume mass ratio of activated cellulose:1.
Preferably, in stepb, the temperature of described heating is 140 DEG C, and the heating response time is 1h.
Embodiment
10
On the basis of embodiment 1-4：
Preferably, in stepb, described urea is the urea liquid of mass concentration 40%, and urea is 4 with the mass ratio of activated cellulose:1.
Preferably, in stepb, described atent solvent is DMA, and atent solvent is 10 with the volume mass ratio of activated cellulose:1.
Preferably, in stepb, the temperature of described heating is 160 DEG C, and the heating response time is 3h.
Embodiment
11
On the basis of embodiment 1-4：
Preferably, in stepb, described urea is the urea liquid of mass concentration 30%, and urea is 3 with the mass ratio of activated cellulose:1.
Preferably, in stepb, described atent solvent is DMA, and atent solvent is 7.5 with the volume mass ratio of activated cellulose:1.
Preferably, in stepb, the temperature of described heating is 150 DEG C, and the heating response time is 2h.
Embodiment
12
On the basis of embodiment 1-4：
Preferably, in stepb, described urea is the urea liquid of mass concentration 25%, and urea is 3.5 with the mass ratio of activated cellulose:1.
Preferably, in stepb, described atent solvent is DMA, and atent solvent is 8 with the volume mass ratio of activated cellulose:1.
Preferably, in stepb, the temperature of described heating is 145 DEG C, and the heating response time is 2.5h.
Embodiment
13
On the basis of embodiment 1-4：
Preferably, in step C, in described NaOH and the solution of zinc oxide, the mass concentration of NaOH is 8%, and the mass concentration of zinc oxide is 1%, and the mass concentration for dissolving the cellulose carbamate solution for obtaining is 6%.
Preferably, in step D, in described spinning process, the composition and proportioning of coagulating bath are Na2SO4
230g/L, ZnSO48g/L, H2SO4 110g/L。
Embodiment
14
On the basis of embodiment 1-4：
Preferably, in step C, in described NaOH and the solution of zinc oxide, the mass concentration of NaOH is 12%, and the mass concentration of zinc oxide is 3%, and the mass concentration for dissolving the cellulose carbamate solution for obtaining is 8%.
Preferably, in step D, in described spinning process, the composition and proportioning of coagulating bath are Na2SO4
245g/L, ZnSO412g/L, H2SO4 140g/L。
Embodiment
15
On the basis of embodiment 1-4：
Preferably, in step C, in described NaOH and the solution of zinc oxide, the mass concentration of NaOH is 10%, and the mass concentration of zinc oxide is 2%, and the mass concentration for dissolving the cellulose carbamate solution for obtaining is 7%.
Preferably, in step D, in described spinning process, the composition and proportioning of coagulating bath are Na2SO4
237.5g/L, ZnSO410g/L, H2SO4 125g/L。
Embodiment
16
On the basis of embodiment 1-4：
Preferably, in step C, in described NaOH and the solution of zinc oxide, the mass concentration of NaOH is 11%, and the mass concentration of zinc oxide is 1.5%, and the mass concentration for dissolving the cellulose carbamate solution for obtaining is 7.5%.
Preferably, in step D, in described spinning process, the composition and proportioning of coagulating bath are Na2SO4
240g/L, ZnSO49g/L, H2SO4 120g/L。
Claims (9)
1. a kind of technique for producing cellulose carbamate fibre long filament, it is characterised in that：Comprise the following steps that：
The activation of A, cellulose
First cellulose is added in sodium hydroxide solution and is soaked so as to activated, then washing obtains activated cellulose；
The preparation of B, cellulose carbamate
Urea and atent solvent are added in activated cellulose, then it is heated, carry out esterification, obtain cellulose carbamate；
The preparation of C, cellulose carbamate solution
Cellulose carbamate is added in solution of the NaOH with zinc oxide, 3～6h of freezing reaction, after the completion of reaction, rises to normal temperature and obtain cellulose carbamate solution, i.e. spinning solution at -5～-15 DEG C；
D, spinning
Spinning solution in step C is made into cellulose carbamate fibre long filament by wet spinning.
2. a kind of technique for producing cellulose carbamate fibre long filament according to claim 1, it is characterised in that：In step, described cellulose is bamboo pulp that the degree of polymerization is 500～900.
3. a kind of technique for producing cellulose carbamate fibre long filament according to claim 1, it is characterised in that：In step, the mass concentration of described sodium hydroxide solution is 16～20%, and cellulose is 1 with the solid-to-liquid ratio of sodium hydroxide solution:(4～6).
4. a kind of technique for producing cellulose carbamate fibre long filament according to claim 1 and 2, it is characterised in that：In step, the temperature of described immersion is 5～15 DEG C, and soak time is 4～8h.
5. a kind of technique for producing cellulose carbamate fibre long filament according to claim 1, it is characterised in that：In stepb, described urea is the urea liquid of mass concentration 20～40%, and urea is (2～4) with the mass ratio of activated cellulose:1.
6. a kind of technique for producing cellulose carbamate fibre long filament according to claim 1 or 5, it is characterised in that：In stepb, described atent solvent is DMA, and atent solvent is (5～10) with the volume mass ratio of activated cellulose:1.
7. a kind of technique for producing cellulose carbamate fibre long filament according to claim 1, it is characterised in that：In stepb, the temperature of described heating is 140～160 DEG C, and the heating response time is 1～3h.
8. a kind of technique for producing cellulose carbamate fibre long filament according to claim 1, it is characterised in that：In step C, in described NaOH and the solution of zinc oxide, the mass concentration of NaOH is 8～12%, and the mass concentration of zinc oxide is 1～3%, and the mass concentration for dissolving the cellulose carbamate solution for obtaining is 6～8%.
9. a kind of technique for producing cellulose carbamate fibre long filament according to claim 1, it is characterised in that：In step D, in described spinning process, the composition and proportioning of coagulating bath are Na2SO4230～245g/L, ZnSO48～12g/L, H2SO4110～140g/L.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930071A (en) * | 2018-08-10 | 2018-12-04 | 高密云鹰新材料科技有限公司 | A kind of carbamate method prepares the production technology of regenerated cellulose staple fiber |
| CN109402783A (en) * | 2018-11-07 | 2019-03-01 | 华祥（中国）高纤有限公司 | A kind of imitative flax fiber, preparation method and applications |
| CN116162176A (en) * | 2023-02-28 | 2023-05-26 | 赣南师范大学 | Preparation method of cellulose carbamate |
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| CN102691125A (en) * | 2012-06-19 | 2012-09-26 | 武汉大学 | Method for preparing regenerated cellulose fibers with cellulose carbamate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102691125A (en) * | 2012-06-19 | 2012-09-26 | 武汉大学 | Method for preparing regenerated cellulose fibers with cellulose carbamate |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930071A (en) * | 2018-08-10 | 2018-12-04 | 高密云鹰新材料科技有限公司 | A kind of carbamate method prepares the production technology of regenerated cellulose staple fiber |
| CN109402783A (en) * | 2018-11-07 | 2019-03-01 | 华祥（中国）高纤有限公司 | A kind of imitative flax fiber, preparation method and applications |
| CN116162176A (en) * | 2023-02-28 | 2023-05-26 | 赣南师范大学 | Preparation method of cellulose carbamate |
| CN116162176B (en) * | 2023-02-28 | 2024-04-26 | 赣南师范大学 | Preparation method of cellulose carbamate |
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