CN105542194A - Sodium hydroxide/sodium cyclamate aqueous solvent system for dissolving pulp cellulose - Google Patents
Sodium hydroxide/sodium cyclamate aqueous solvent system for dissolving pulp cellulose Download PDFInfo
- Publication number
- CN105542194A CN105542194A CN201610135569.8A CN201610135569A CN105542194A CN 105542194 A CN105542194 A CN 105542194A CN 201610135569 A CN201610135569 A CN 201610135569A CN 105542194 A CN105542194 A CN 105542194A
- Authority
- CN
- China
- Prior art keywords
- dissolving pulp
- solvent system
- sugaron
- aqueous solvent
- cellulose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/02—Cellulose; Modified cellulose
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Paper (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a sodium hydroxide/sodium cyclamate aqueous solvent system for dissolving pulp cellulose. According to the sodium hydroxide/sodium cyclamate aqueous solvent system for dissolving pulp cellulose, dissolving pulp with different weight percentage concentrations is added to a 7% NaOH solution, and sodium cyclamate is added according to weight percentage of absolute dry pulp; in terms of 1 g by mass of the absolute dry pulp, the addition amount of sodium cyclamate is controlled in a range from 16% to 20%. With the adoption of the cellulose aqueous solvent system, dissolving of high-polymerization-degree cellulose molecules with low accessibility in cellulose molecules is promoted.
Description
Technical field
The present invention relates to cellulosic sodium hydroxide/additive aqueous solvent system, particularly relate to dissolving pulp cellulosic sodium hydroxide/Sugaron aqueous solvent system.
Background technology
Along with the worsening shortages of petroleum resources with take oil as day by day the increasing the weight of of synthesized polymer material environmental pollution of raw material, the natural polymer Mierocrystalline cellulose the abundantest as annual production on the earth is more and more subject to people's attention.The key issue of current obstruction Mierocrystalline cellulose widespread use finds i.e. environmental protection but also can the feasible solvent system of the industrialization of dissolving cellulos preferably.The solvent of dissolving cellulos has water solvent and the large class of non-aqueous solvent two.Due to reasons such as the environmental pollutions that some solvent recuperation cause, N-methylmorpholine-N-oxide compound (NMMO), ionic liquid and sodium hydroxide water solvent system are considered to good green solvent system.NMMO is only had really to accomplish the suitability for industrialized production of casing packaging film in the Viskase company of Chicago,U.S at present.But NMMO cost is higher, and have strict requirement to water content and solvent temperature, the personnel casualty accidents simultaneously using the factory of NMMO to cause because of its blast in the U.S. also happens occasionally.Ionic liquid is also because high production cost fails to obtain suitability for industrialized production widely.And NaOH water system dissolution in low temperature cellulose system causes and pays close attention to widely because of its inexpensive environmental protection, feature fast of dissolving.The investigators such as Tokyo Univ Japan, domestic Wuhan University, Donghua University, Zhejiang University, Chinese University of Science and Technology carry out dissolving cellulos and prepare by adding urea, thiocarbamide, polyoxyethylene glycol (PEG) etc. in the NaOH aqueous solution research having comparison system deep in material of regenerated cellulose.The cellosolve systems such as current use NaOH/ urea, NaOH/ thiocarbamide have prepared novel cellulose silk, film, chromatographic column filler, matrix material and derivatived cellulose etc. in laboratory, and by the successful spinning of pilot scale.Compared with pure cerium hydroxide sodium solution, the interpolation of NaOH aqueous solution small molecular compound and medium molecule improves the stability of the dissolving power of this individual system and the cellulose solution of generation to a certain extent.But this system has certain restriction to soluble cellulosic molecular weight and concentration, and the unstable easily gel of cellulose solution after dissolving, the industrialization from film forming also has a segment distance.The people such as French investigator NicolasLeMoigne in 2009 have studied the dissolution mechanism of lumber fibre cellulose fiber in the NaOH aqueous solution, result shows that aqueous sodium hydroxide solution does not rely on the cellulosic polymerization degree to the dissolving power of cellulose chain, and it is relevant with the chemical environment residing for cellulose molecular chain in fibrous texture, as long as namely retain the primary formation form (namely retaining cellulose Ⅰ cell configuration) of natural fiber as far as possible, the dissolution mechanism of the plain derivative of timber, cotton, other vegetable fibre and some fibre is almost identical.
Along with the quick rise of cotton price, from now on except linters (cottonlinter), prior role will be played the part of in industrial raw material with the dissolving pulp of the high cellulose content of the plant production such as timber and bamboo.Dissolving pulp has high content of cellulose, the bleach chemical pulp of higher brightness and uniform molecular weight distribution.Be different from paper grade (stock) pulp, dissolving pulp is to the form of pulp fibers and intensity not requirement, but there is higher requirement to the polymerization degree and the chemical composition, particularly alpha-cellulose content (i.e. the non-cellulosic carbohydrate of Mierocrystalline cellulose and alkali resistant) of fiber and whiteness.Dissolving pulp can be processed into viscose fiber, glassine paper, pharmaceutical industries sterilising filtration paper, cellulose acetate, nitrocotton, carboxymethyl cellulose, Microcrystalline Cellulose, ether of cellulose etc. and be widely used in the field such as textiles and tire, thickening material, paint, cigarette filter, medicine, food, casing, makeup.Recent decades scientists all to think that whether Mierocrystalline cellulose dissolves in the NaOH aqueous solution all relevant with cellulosic physical structure and alkali concn, the Mierocrystalline cellulose that can dissolve is all generally the low polymerization degree Mierocrystalline cellulose that accessibility is high.The experimental result relevant with the cellulosic dissolving of dissolving pulp that I does recently shows, chooses the dissolving that the suitable additive with hydrogen bond receptor and hydrogen bond donor probably promotes the high-polymerization degree cellulosic molecule that accessibility is low in cellulosic molecule.
Summary of the invention
In view of the above fact, the invention provides a kind of dissolving pulp cellulosic sodium hydroxide/Sugaron aqueous solvent system, not only have developed a kind of new sodium hydroxide/additive aqueous solution cellosolve system, and this cellosolve system is better than the aqueous solution cellosolve systems such as NaOH/ urea (or thiocarbamide) to the cellulosic dissolving power of dissolving pulp.
Dissolving pulp of the present invention cellulosic sodium hydroxide/Sugaron aqueous solvent system, puts into 7%NaOH solution by the dissolving pulp of Different Weight percentage concentration, then adds Sugaron according to the weight percent of oven dry stock; Wherein relative to the oven dry stock of 1g quality, add Sugaron and control at 16%-20%; The addition of Sugaron can select desired value according to the kind of dissolving pulp, the polymerization degree, alpha-cellulose content etc.For acid sulfite process needlebush dissolving pulp, 7%NaOH/20% Sugaron aqueous solvent system solute effect is best; For prehydrolytic sulfate process needlebush dissolving pulp, 7%NaOH/16% Sugaron aqueous solvent system solute effect is best; For leaf wood dissolving pulp, 7%NaOH/20% Sugaron aqueous solvent system solute effect is best; For bamboo dissolved pulp, 7%NaOH/20% Sugaron aqueous solvent system solute effect is best.
Described dissolving pulp comprises needlebush dissolving pulp, leaf wood dissolving pulp or the bamboo dissolved pulp that acid sulfite process or prehydrolytic sulfate process are produced.
The polymerization degree of described dissolving pulp is 650-1500.
Described dissolving pulp dissolving pulp alpha-cellulose content >=92%.
Compared with prior art, the invention has the beneficial effects as follows:
1, concerning the dissolving pulp of identical weight percentage concentration, the viscosity that cellulose aqueous solution solvent system of the present invention dissolves the cellulose solution that it generates is utilized to significantly improve.
2, cellulose aqueous solution solvent system of the present invention is utilized to facilitate the dissolving of the low high-polymerization degree cellulosic molecule of accessibility in cellulosic molecule.
Embodiment
Below in conjunction with specific embodiment, content of the present invention is described in more detail.In addition, except non-specifically is recorded in the application's book, otherwise concentration etc. take all weight as benchmark, and numerical range comprises end points.
Experiment 1. is applicable to needlebush dissolving pulp
Embodiment 1: select content of cellulose to be 97.3%, polymerization degree DP be the acid sulfite process needlebush dissolving pulp of 1520.Dense for 2% slurry, in transparent sample bottle, add dissolving pulp and 7%NaOH, then add 20% (weight percent based on oven dry stock) Sugaron.Refrigerator low temperature (-12 DEG C) storage is put into after 2 hours after abundant dispersed with stirring swollen, stirring of thawing obtains dissolving pulp cellulose dissolution system, then centrifugation, extract upper strata vitreous fibre cellulose solution its viscosity of 0.9-1.0 type determination of ubbelohde viscometer, viscosity size represents with the relative time passed through.Do not dissolve part to be filtered by alkaline-resisting sand core funnel, transfer to after washing neutrality in frosting ware, and with 2 cover glasses, its compacting under wet condition is flattened, weigh after room temperature is air-dry to calculate the cellulosic dissolving percentage of dissolving pulp.And then put it into siccative vacuum drying oven dry dewater completely after do XRD analysis.
Comparative example 1: only use the 7%NaOH aqueous solution, do not add Sugaron, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
As comparative example 2, only use 7%NaOH/12% aqueous solution of urea, do not add Sugaron, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
As comparative example 3,9.5%NaOH/4.5% thiourea solution, do not add Sugaron, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
The result of 1 embodiment 1 tested by table 1.
Table 1 represents that identical weight per-cent starches viscosity and the dissolving ratio of the cellulose solution generated after dense needlebush dissolving pulp dissolves in different sorts solvent.The viscosity that 7% sodium hydroxide/20% Sugaron aqueous solvent system dissolves the cellulose solution generated significantly improves, dissolution rate also obviously increases, and shows that utilizing cellulose aqueous solution solvent system of the present invention to facilitate cellulosic molecule dissolves preferably.
Embodiment 2: select content of cellulose to be more than or equal to 93.55%, polymerization degree DP is the prehydrolytic sulfate process needlebush dissolving pulp of 1190.Dense for 2% slurry, in transparent sample bottle, add dissolving pulp and 7%NaOH, then add 8% (weight percent based on oven dry stock) thionamic acid sodium.Other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
Comparative example 1: only use the 7%NaOH aqueous solution, do not add thionamic acid sodium, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
As comparative example 2, only use 7%NaOH/12% aqueous solution of urea, do not add thionamic acid sodium, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
As comparative example 3,9.5%NaOH/4.5% thiourea solution, do not add thionamic acid sodium, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
The result of 1 embodiment 2 tested by table 2.
Table 2 represents that identical weight per-cent starches viscosity and the dissolving ratio of the cellulose solution generated after dense needlebush dissolving pulp dissolves in different sorts solvent.The viscosity that 7% sodium hydroxide/16% Sugaron aqueous solvent system dissolves the cellulose solution generated significantly improves, and high viscosity and lower dissolution rate show to utilize cellulose aqueous solution solvent system of the present invention to facilitate the dissolving of the low high-polymerization degree cellulosic molecule of accessibility in cellulosic molecule.
Experiment 2. is applicable to leaf wood dissolving pulp
Embodiment 1: select content of cellulose to be >=92%, polymerization degree DP be the leaf wood dissolving pulp of 800.Dense for 2% slurry, in transparent sample bottle, add dissolving pulp and 7%NaOH, then add 20% (weight percent based on oven dry stock) Sugaron.Other is identical with embodiment 1 in experiment 1..
As comparative example 1, only use the 7%NaOH aqueous solution, do not add Sugaron, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
As comparative example 2, only use 7%NaOH/12% aqueous solution of urea, do not add Sugaron, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
As comparative example 3,9.5%NaOH/4.5% thiourea solution, do not add Sugaron, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
The result of 2 tested by table 3.
Table 3 represents that identical weight per-cent starches viscosity and the dissolving ratio of the cellulose solution generated after dense leaf wood dissolving pulp dissolves in different sorts solvent.The viscosity that 7% sodium hydroxide/20% Sugaron aqueous solvent system dissolves the cellulose solution generated significantly improves, and high viscosity and lower dissolution rate show to utilize cellulose aqueous solution solvent system of the present invention to facilitate the dissolving of the low high-polymerization degree cellulosic molecule of accessibility in cellulosic molecule.
Experiment 3. is applicable to bamboo dissolved pulp
Embodiment 1: select content of cellulose to be >=92%, the polymerization degree DP bamboo dissolved pulp being about 800.Dense for 2% slurry, in transparent sample bottle, add dissolving pulp and 7%NaOH, then add 20% (weight percent based on oven dry stock) Sugaron.Other is identical with embodiment 1 in experiment 1..
As comparative example 1, only use the 7%NaOH aqueous solution, do not add Sugaron, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
As comparative example 2, only use 7%NaOH/12% aqueous solution of urea, do not add Sugaron, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
As comparative example 3,9.5%NaOH/4.5% thiourea solution, do not add Sugaron, other observation of carrying out dissolving pulp cellulose dissolution effect identical with embodiment 1.
The result of 3 tested by table 4.
Table 4 represents that identical weight per-cent starches viscosity and the dissolving ratio of the cellulose solution generated after dense bamboo dissolved pulp dissolves in different sorts solvent.The viscosity that 7% sodium hydroxide/20% Sugaron aqueous solvent system dissolves the cellulose solution generated significantly improves, and high viscosity and lower dissolution rate show to utilize cellulose aqueous solution solvent system of the present invention to facilitate the dissolving of the low high-polymerization degree cellulosic molecule of accessibility in cellulosic molecule.
The invention relates to cellulosic sodium hydroxide/additive aqueous solvent system, particularly relate to dissolving pulp cellulosic sodium hydroxide/additive aqueous solvent system.Additive Sugaron is a kind of foodstuff additive white powder, is commonly called as Sodium Cyclamate, water-soluble, solubleness >=10g/100ml water in 20 DEG C of water; There are in molecule 1 hydrogen bond donor and 4 hydrogen bond receptors, the effect destroying hydrogen bond in cellulosic molecule can be played better.
Dissolving cellulos object of the present invention is except dissolving pulp Mierocrystalline cellulose, cotton linter pulp, bleaching wood pulp, Microcrystalline Cellulose are also passable, because the addition of the not equal factor Sugaron of degree of crystallinity, a content of cellulose will find optimum value in 16%-20% scope.
When implementing of the present invention, compared with current 7%NaOH/12% aqueous solution of urea solvent system, the viscosity (representing second with relative time) of the cellulose solution of generation improves more than about 2 times (the hemicellulose average yield based in biomass).Compared with current 9.5%NaOH/4.5% thiourea solution solvent system, the viscosity (representing second with relative time) of the cellulose solution of generation improves about 3 times.
Claims (5)
1. dissolving pulp cellulosic sodium hydroxide/Sugaron aqueous solvent system, it is characterized in that, the dissolving pulp of Different Weight percentage concentration is put into 7%NaOH solution, then adds Sugaron according to the weight percent of oven dry stock; Wherein relative to the oven dry stock of 1g quality, the amount of adding Sugaron controls at 16%-20%.
2. dissolving pulp according to claim 1 cellulosic sodium hydroxide/Sugaron aqueous solvent system, it is characterized in that, dissolving pulp comprises needlebush dissolving pulp, leaf wood dissolving pulp or the bamboo dissolved pulp that prehydrolysis sulphite process or prehydrolytic sulfate process are produced.
3. dissolving pulp according to claim 1 cellulosic sodium hydroxide/Sugaron aqueous solvent system, is characterized in that, the polymerization degree of dissolving pulp is 650-1520.
4. dissolving pulp according to claim 1 cellulosic sodium hydroxide/Sugaron aqueous solvent system, is characterized in that, dissolving pulp alpha-cellulose content >=92%.
5. dissolving pulp according to claim 1 cellulosic sodium hydroxide/Sugaron aqueous solvent system, it is characterized in that, for acid sulfite process needlebush dissolving pulp, adopt 7%NaOH/20% Sugaron aqueous solvent system; For prehydrolytic sulfate process needlebush dissolving pulp, adopt 7%NaOH/16% Sugaron aqueous solvent system; For leaf wood dissolving pulp, adopt 7%NaOH/20% Sugaron aqueous solvent system; For bamboo dissolved pulp, adopt 7%NaOH/20% Sugaron aqueous solvent system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610135569.8A CN105542194B (en) | 2016-03-09 | 2016-03-09 | Dissolve sodium hydroxide/sodium cyclohexylsulfamate aqueous solvent system of pulp cellulose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610135569.8A CN105542194B (en) | 2016-03-09 | 2016-03-09 | Dissolve sodium hydroxide/sodium cyclohexylsulfamate aqueous solvent system of pulp cellulose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105542194A true CN105542194A (en) | 2016-05-04 |
| CN105542194B CN105542194B (en) | 2017-11-21 |
Family
ID=55821778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610135569.8A Expired - Fee Related CN105542194B (en) | 2016-03-09 | 2016-03-09 | Dissolve sodium hydroxide/sodium cyclohexylsulfamate aqueous solvent system of pulp cellulose |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105542194B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106185929A (en) * | 2016-07-19 | 2016-12-07 | 句容市百诚活性炭有限公司 | A kind of preparation method of the activated carbon with flourishing pore structure |
| CN111391352A (en) * | 2020-03-18 | 2020-07-10 | 天津商业大学 | Forming method of dissolving pulp fiber buffer packaging material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318575A (en) * | 2000-04-17 | 2001-10-24 | 武汉大学 | Solvent composition and its use |
| CN101135120A (en) * | 2007-09-17 | 2008-03-05 | 云南昌宁建星纸业有限公司 | Process for manufacturing natural antibiotic bamboo pulp by dendrocalamus giganteus non-sulfate method |
| CN102432891A (en) * | 2011-09-15 | 2012-05-02 | 喻翠云 | Method for dissolving cellulose |
-
2016
- 2016-03-09 CN CN201610135569.8A patent/CN105542194B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318575A (en) * | 2000-04-17 | 2001-10-24 | 武汉大学 | Solvent composition and its use |
| CN101135120A (en) * | 2007-09-17 | 2008-03-05 | 云南昌宁建星纸业有限公司 | Process for manufacturing natural antibiotic bamboo pulp by dendrocalamus giganteus non-sulfate method |
| CN102432891A (en) * | 2011-09-15 | 2012-05-02 | 喻翠云 | Method for dissolving cellulose |
Non-Patent Citations (3)
| Title |
|---|
| 吕昂等: ""纤维素溶剂进展"", 《高分子学报》 * |
| 李之工: "《纤维素物理化学》", 31 March 1965 * |
| 王海燕等: ""有关氢键理论研究的现状及前景"", 《河北师范大学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106185929A (en) * | 2016-07-19 | 2016-12-07 | 句容市百诚活性炭有限公司 | A kind of preparation method of the activated carbon with flourishing pore structure |
| CN111391352A (en) * | 2020-03-18 | 2020-07-10 | 天津商业大学 | Forming method of dissolving pulp fiber buffer packaging material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105542194B (en) | 2017-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Han et al. | Preparation and comparative assessment of regenerated cellulose films from corn (Zea mays) stalk pulp fines in DMAc/LiCl solution | |
| CN105392929A (en) | Process for the production of shaped cellulose articles | |
| Yan et al. | Fractionation of lignin from eucalyptus bark using amine-sulfonate functionalized ionic liquids | |
| Chen et al. | Combined effects of raw materials and solvent systems on the preparation and properties of regenerated cellulose fibers | |
| Shi et al. | Effects of lignin and hemicellulose contents on dissolution of wood pulp in aqueous NaOH/urea solution | |
| CN109487546B (en) | Efficient and environment-friendly preparation method of cationic nano-fibrillated cellulose | |
| CN105801883B (en) | A kind of method for preparing cellulose solution | |
| Gao et al. | Fabrication of regenerated cellulose films by DMAc dissolution using parenchyma cells via low-temperature pulping from Yunnan-endemic bamboos | |
| CN101654522A (en) | Anti-degradable solvent for dissolving cellulose and preparation method of spinning dope thereof | |
| CN105568744A (en) | Cornstalk nanocellulose whiskers and preparation method and application thereof | |
| Nakasone et al. | Effect of pre‐treatment of sugarcane bagasse on the cellulose solution and application for the cellulose hydrogel films | |
| Draman et al. | Eco-friendly extraction and characterization of cellulose from lignocellulosoic fiber | |
| CN105542194A (en) | Sodium hydroxide/sodium cyclamate aqueous solvent system for dissolving pulp cellulose | |
| CN103408805A (en) | Nano-cellulose-fiber-reinforced hemicellulose membrane and preparation method thereof | |
| CN107915783A (en) | A kind of method that carboxymethyl cellulose is prepared using waste paper as raw material | |
| CN104262642A (en) | Method for dissolving cellulose in aqueous solution of NaOH/thiourea at normal temperature | |
| Antal et al. | New aspects in cationization of lignocellulose materials. I. Preparation of lignocellulose materials containing quarternary ammonium groups | |
| CN1193061C (en) | Solvent composite and preparation method and use thereof | |
| Yadollahi et al. | SO 2–ethanol–water (SEW) and kraft pulping of giant milkweed (Calotropis procera) for cellulose acetate film production | |
| CN1289587C (en) | Cellosolve and its use | |
| CN101735395A (en) | Preparation method of water absorbing material of industrial hemp stalk core cellulose | |
| CN105694064B (en) | Dissolve sodium hydroxide/sulfamic acid sodium water solution dicyandiamide solution of pulp cellulose | |
| CN102002762A (en) | Method for preparing high-strength special-shape cellulose fiber | |
| CN102191706A (en) | Process for preparing cellulose | |
| Kihlman | Dissolution of cellulose for textile fibre applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171121 Termination date: 20190309 |