NL2025890B1 - Preparation method of lignin-chitosan based fluoride-free high-strength super-hydrophobic paper - Google Patents
Preparation method of lignin-chitosan based fluoride-free high-strength super-hydrophobic paper Download PDFInfo
- Publication number
- NL2025890B1 NL2025890B1 NL2025890A NL2025890A NL2025890B1 NL 2025890 B1 NL2025890 B1 NL 2025890B1 NL 2025890 A NL2025890 A NL 2025890A NL 2025890 A NL2025890 A NL 2025890A NL 2025890 B1 NL2025890 B1 NL 2025890B1
- Authority
- NL
- Netherlands
- Prior art keywords
- solution
- paper
- lignin
- alkali lignin
- pulp
- Prior art date
Links
- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 39
- 229920001661 Chitosan Polymers 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 22
- 229920005610 lignin Polymers 0.000 claims abstract description 122
- 239000003607 modifier Substances 0.000 claims abstract description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 239000002798 polar solvent Substances 0.000 claims abstract description 13
- 239000003999 initiator Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000002791 soaking Methods 0.000 claims abstract description 10
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 30
- 239000010902 straw Substances 0.000 claims description 8
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 6
- -1 methoxysilane alkane Chemical class 0.000 claims description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 5
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 5
- 239000011425 bamboo Substances 0.000 claims description 5
- 239000011121 hardwood Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- 240000000111 Saccharum officinarum Species 0.000 claims description 4
- 235000007201 Saccharum officinarum Nutrition 0.000 claims description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 9
- 244000082204 Phyllostachys viridis Species 0.000 claims 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims 1
- ZHKRBCQSLSTSAO-UHFFFAOYSA-N dodecyl(trimethyl)silane Chemical compound CCCCCCCCCCCC[Si](C)(C)C ZHKRBCQSLSTSAO-UHFFFAOYSA-N 0.000 claims 1
- 238000000227 grinding Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000010899 old newspaper Substances 0.000 claims 1
- 229910000077 silane Inorganic materials 0.000 claims 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims 1
- 239000003513 alkali Substances 0.000 abstract description 94
- 150000001335 aliphatic alkanes Chemical class 0.000 abstract description 8
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 6
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 235000013305 food Nutrition 0.000 abstract description 3
- 239000002028 Biomass Substances 0.000 abstract description 2
- 239000008204 material by function Substances 0.000 abstract description 2
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 36
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 24
- 239000000835 fiber Substances 0.000 description 14
- 238000010009 beating Methods 0.000 description 7
- 230000002209 hydrophobic effect Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 241001330002 Bambuseae Species 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 241001343274 Dichrostachys spicata Species 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 239000010893 paper waste Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 2
- PQDJYEQOELDLCP-UHFFFAOYSA-N trimethylsilane Chemical compound C[SiH](C)C PQDJYEQOELDLCP-UHFFFAOYSA-N 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920002101 Chitin Polymers 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 229910002656 O–Si–O Inorganic materials 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 229940058573 b-d glucose Drugs 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- SCPWMSBAGXEGPW-UHFFFAOYSA-N dodecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCC[Si](OC)(OC)OC SCPWMSBAGXEGPW-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- RSKGMYDENCAJEN-UHFFFAOYSA-N hexadecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCCCCCC[Si](OC)(OC)OC RSKGMYDENCAJEN-UHFFFAOYSA-N 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- SLYCYWCVSGPDFR-UHFFFAOYSA-N octadecyltrimethoxysilane Chemical compound CCCCCCCCCCCCCCCCCC[Si](OC)(OC)OC SLYCYWCVSGPDFR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000006884 silylation reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- AXNJHBYHBDPTQF-UHFFFAOYSA-N trimethoxy(tetradecyl)silane Chemical compound CCCCCCCCCCCCCC[Si](OC)(OC)OC AXNJHBYHBDPTQF-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/23—Lignins
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
The present invention discloses a preparation method of lignin-chitosan based fluoride-free high-strength super-hydrophobic paper, and relates to the technical field of papermaking and polymeric functional materials; dissolving alkali lignin in a polar solvent, slowly adding an initiator to an obtained alkali lignin solution, heating to 90-180°C under protection of nitrogen, slowly adding long-chain alkane methoxysilane to react to obtain a modified alkali lignin solution, settling and purifying the modified alkali lignin solution to separate out an alkali lignin modifier, drying for later use, dissolving the alkali lignin modifier in the polar solvent again to obtain an alkali lignin modifier solution, soaking a paper pulp in the solution, stirring and adding chitosan, and performing papermaking to obtain super-hydrophobic paper; the super-hydrophobic paper has strong hydrophobicity, reutilization property and seal-cleaning capacity, is simple in operation, adopts raw materials which are cheap and rich in source, belongs to cyclic comprehensive application of biomass raw materials, and thus has good application prospect and economical benefit in the fields of waterproof protection of transport package, fresh food cold storage and high-end products.
Description
Preparation method of lighin-chitosan based fluoride-free high-strength super-hydrophobic paper
TECHNICAL FIELD The present invention discloses a preparation method of lignin-chitosan based fluoride-free high-strength super-hydrophobic paper, and relates to the technical field of papermaking and polymeric functional materials.
BACKGROUD Lignin is wide in resource in the nature, is an essential component in plant raw materials, ranking only second to cellulose, and is one of the richest natural high polymers of the nature. Lignin combines cellulose with hemicellulose by a chemical or physical method, to increase the physical strength of wood, so that wood can completely grow in a natural environment without corrosion. In pulping and papermaking processes, lignin is removed by a digesting process, and cellulose is remained to be used for producing paper. The removed lignin mainly exists in a black liquor, while lignin adopted in the present invention is separated from alkaline papermaking black liquor, and thus belongs to economic cyclic utilization of plant raw materials.
Chitosan is also known as deacetylated chitin, is the only amino polysaccharide found in large quantities in nature, with chemical name of polyglucosamine (1-4)-2-amino-B-D-glucose, is a six-membered ring high- molecular compound, contains three active groups including primary and secondary hydroxyl groups and amino, and can form hydrogen bond connection with cellulose.
The present invention provides a preparation method of lignin-chitosan based fluoride-free high-strength super-hydrophobic paper, which processes fiber by utilizing modified lignin and chitosan to form high-strength super-hydrophobic paper, a contact angle of the super-hydrophobic paper is greater than 150°, a sliding angle is smaller than 10°, due to superstrong hydrophobic and oleophilic properties, the super-hydrophobic paper can be used for transport package, especially package and transport of fresh food and chilled food, and compared with a polymerization isolation coating and a wax coating on a paper surface in waterproof property, the super-hydrophobic paper obtained in the present invention is more economical, simple in operation, adopts raw materials which are cheap and rich in source, is fluoride-free and good in safety, belongs to cyclic comprehensive application of biomass raw materials, and thus has good application prospect and economical benefit.
SUMMARY Directed to problems of the prior art, the present invention provides a preparation method of lignin-chitosan based fluoride-free high-strength super- hydrophobic paper, which modifies soaked fiber pulp by utilizing modified lignin and chitosan in a mechanical solvent, to obtain super-hydrophobic lignin-chitosan high- strength fiber paper.
A specific scheme provided by the present invention is: a preparation method of lignin-chitosan based fluoride-free high-strength super-hydrophobic paper, comprising: dissolving alkali lignin in a polar solvent, slowly adding an initiator to an obtained alkali lignin solution, heating to 90- 180°C under protection of nitrogen, slowly adding long-chain alkane methoxysilane to react to obtain a modified alkali lignin solution, settling and purifying the modified alkali lignin solution to separate out an alkali lignin modifier, and drying for later use, and dissolving the alkali lignin modifier in the polar solvent again to obtain an alkali lignin modifier solution, soaking a paper pulp in the solution, stirring and adding chitosan, and performing papermaking to obtain super-hydrophobic paper.
According to the preparation method, dissolving alkali lignin in any polar solvent out of acetone, dioxane, N,N-dimethylformamide and DMSO.
According to the preparation method, slowly adding a triethylamine or sodium alkoxide initiator with mass concentration of 1%-10% to an obtained alkali lignin solution.
According to the preparation method, slowly adding an initiator to an obtained alkali lignin solution, heating to 90-180°C under the protection of nitrogen, and slowly adding long-chain alkane methoxysilane with mass concentration of 1%- 20% to react to obtain a modified alkali lignin solution.
According to the preparation method, reacting for 2-10h to obtain a modified alkali lignin solution. According to the preparation method, the long-chain alkane methoxysilane refers to that from dodecyl! trimethylsilane to octadecy! trimethylsilane.
According to the preparation method, dissolving alkali lignin in a polar solvent, to obtain an alkali lignin solution with mass concentration of 5%-15%.
According to the preparation method, the mass fraction of a modified alkali lignin solution obtained after reacting is 5%-15%.
According to the preparation method, the mass percent of chitosan is
0.01%-0.2%.
According to the preparation method, the paper pulp is one or mixed pulp of several out of needlebush pulp, hardwood pulp, old newpaper or straw pulp, bamboo pulp and sugarcane pulp.
According to the preparation method, the mass percent of paper pulp in papermaking is 10%-40%.
According to the preparation method, the beating degree of the paper pulp is 30°SR-50°SR.
A lignin-chitosan based fluoride-free high-strength super-hydrophobic paper, prepared according to the foregoing preparation method.
An application implemented by utilizing the lignin-chitosan based fluoride- free high-strength super-hydrophobic paper.
The present invention has the following benefits: the present invention provides a preparation method of lignin-chitosan based fluoride-iree high-strength super-hydrophobic paper, in which, alkali lignin is dissolved in a polar solvent to obtain a lignin solution, an initiator is added to the lignin solution, and pretreatment is performed on lignin in the solution by utilizing strong basicity of the initiator to increase the quantity of phenolic hydroxyl groups, heating is performed under the protection of nitrogen to generate hydrolysis reaction with long-chain alkane methoxysilane, so as to realize silylation of lignin and obtain super-hydrophobic modified lignin of a net stereostructure of a long- chain alkane methoxysilane framework, meanwhile, lignin contains a large quantity of hydroxide radicals and has certain rigidity, which lays good foundation for grafting reagents with low surface energy and constructing rough surfaces, so that fiber soaked in an alkali lignin modifier solution can adsorb modified lignin to have a super-hydrophobic property, meanwhile, chitosan is added to the system, hydroxyl groups and amino groups of chitosan from hydrogen bonds with fiber, so as to greatly promote the strength properties of fiber, and compared with existing paper, the super-hydrophobic paper has remarkable mechanical strength, and meanwhile, contact angles of super-hydrophobic lignin paper all reach above 150°, and the super-hydrophobic property of paper is remarkable, thereby being suitable for application with special requirements such as water resistance and moisture resistance.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow diagram of a method of the present invention; FIG. 2 is a schematic infrared spectrum contrast diagram of alkali lignin before and after modification, infrared absorption peaks at 1064cm! and 7200m! respectively representing the stretching vibration of an O-Si-O bond and an Si-C bond, indicating that a graft has already exist on lignin.
FIG. 3 is an SEM diagram of original paper, paper fibre being smooth and clear and distinct.
FIG. 4 is an SEM diagram of modified paper, particles attaching to the surface of paper fiber, to form a rough surface.
FIG. 5 is a picture of a paper contact angle, a contact angle being 155°.
DESCRIPTION OF THE EMBODIMENTS The present invention provides a preparation method of lignin-chitosan based fluoride-free high-strength super-hydrophobic paper, comprising: dissolving alkali lignin in a polar solvent, slowly adding an initiator to an obtained alkali lignin solution, heating to 90- 180°C under protection of nitrogen, slowly adding long-chain alkane methoxysilane to react to obtain a modified alkali lignin solution, settling and purifying the modified alkali lignin solution to separate out an alkali lignin modifier, and drying for later use, and dissolving the alkali lignin modifier in the polar solvent again to obtain an atkali lignin modifier solution, soaking a paper pulp in the solution, stirring and adding chitosan, and performing papermaking to obtain super-hydrophobic paper.
Meanwhile, the present invention provides a lignin-chitosan based fluoride- free high-strength super-hydrophobic paper prepared by utilizing the foregoing preparation method.
Alkali lignin processed with long-chain alkane methoxysilane to obtain modified alkali lignin, and a chemical equation is as follows:
~~ J = Ho on he 0) oF Ng | © de © an GP ein ee A cx,
Ï The following further describes the present invention in combination with drawings and specific embodiments, so that technicians of the field may better understand and implement the present invention, however, the embodiments 5 should not be deemed as limitation to the present invention. Embodiment 1 a. taking 5g of needlebush pulp (absolutely dry), defibering for 3min, filtering to remove moisture to be processed; b. dissolving alkali lignin in DMF to prepare an alkali lignin solution with mass fraction of 10%, dissolving sodium methoxide in ethanol to prepare a sodium methoxide solution with mass fraction of 2%, slowly mixing the alkali lignin solution with the sodium methoxide solution, heating to 90°C under the protection of nitrogen, then slowly adding tetradecyl trimethoxy silane with mass fraction of
3.5%, reacting and stirring for 5h to form a steady modified alkali lignin solution; settling and separating out modified alkali lignin with ethanol to obtain an alkali lignin modifier which is then dried for later use; and c. dissolving the alkali lignin modifier in DMF to prepare an alkali lignin modifier solution with mass fraction of 5%, soaking the needlebush fiber after being processed in a in the alkali lignin modifier solution, stirring for 2h at room temperature and then adding 0.01% chitosan to continue to stir for 1.5h, papermaking beating degree being 30°SR and mass percent of paper pulp being 10%, and drying to obtain a micro-nano modified and alkali lignin modified paper, the surface contact angle of which reaching 152°, which reaches a super- hydrophobicity level.
Embodiment 2 a. taking 5g of hardwood pulp (absolutely dry), defibering for 4min, filtering to remove moisture to be processed; b. dissolving alkali lignin in DMF to prepare an alkali lignin solution with mass fraction of 10%, dissolving sodium methoxide in ethanol to prepare a sodium methoxide solution with mass fraction of 1%, slowly mixing the alkali lignin solution with the sodium methoxide solution, heating to 110°C under the protection of nitrogen, then slowly adding dodecyl trimethoxy silane with mass fraction of 1%, reacting and stirring for 4h to form a steady modified alkali lignin solution; settling and separating out modified alkali lignin with ethanol to obtain an alkali lignin modifier which is then dried for later use; and c. dissolving the alkali lignin modifier in DMF to prepare an alkali lignin modifier solution with mass fraction of 10%, soaking the hardwood fiber after being processed in a in the alkali lignin modifier solution, stirring for 3h at room temperature and then adding 0.08% chitosan to continue to stir for 1h, papermaking beating degree being 35°SR and mass percent of paper pulp being 20%, and drying to obtain a micro-nano modified and alkali lignin modified paper, the surface contact angle of which reaching 154°, which reaches a super- hydrophobicity level.
Embodiment 3 a. taking bg of straw pulp (absolutely dry), defibering for 6min, filtering to remove moisture to be processed; b. dissolving alkali lignin in DMF to prepare an alkali lignin solution with mass fraction of 11%, dissolving sodium methoxide in ethanol to prepare a sodium methoxide solution with mass fraction of 3%, slowly mixing the alkali lignin solution with the sodium methoxide solution, heating to 125°C under the protection of nitrogen, then slowly adding cetyl! trimethoxy silane with mass fraction of 7%, reacting and stirring for 6h to form a steady modified alkali lignin solution; settling and separating out modified alkali lignin with ethanol to obtain an alkali lignin modifier which is then dried for later use; and c. dissolving the alkali lignin modifier in DMF to prepare an alkali lignin modifier solution with mass fraction of 11%, soaking the straw fiber after being processed in a in the alkali lignin modifier solution, stirring for 5h at room temperature and then adding 0.06% chitosan to continue to stir for 1h,
papermaking beating degree being 40°SR and mass percent of paper pulp being 25%, and drying to obtain a micro-nano modified and alkali lignin modified paper, the surface contact angle of which reaching 150°, which reaches a super- hydrophobicity level.
Embodiment 4 a. taking bg of straw pulp and waste paper pulp (absolutely dry), defibering for 5min, filtering to remove moisture to be processed; b. dissolving alkali lignin in DMF to prepare an alkali lignin solution with mass fraction of 12%, dissolving sodium methoxide in ethanol to prepare a sodium methoxide solution with mass fraction of 5%, slowly mixing the alkali lignin solution with the sodium methoxide solution, heating to 130°C under the protection of nitrogen, then slowly adding cetyl! trimethoxy silane with mass fraction of 12%, reacting and stirring for 8h to form a steady modified alkali lignin solution; settling and separating out modified alkali lignin with ethanol to obtain an alkali lignin modifier which is then dried for later use; and c. dissolving the alkali lignin modifier in DMF to prepare an alkali lignin modifier solution with mass fraction of 13%, soaking the pulp fiber after being processed in a in the alkali lignin modifier solution, stirring for 8h at room temperature and then adding 0.15% chitosan to continue to stir for 1h, papermaking beating degree being 40°SR and mass percent of paper pulp being 35%, and drying to obtain a micro-nano modified and alkali lignin modified paper, the surface contact angle of which reaching 153°, which reaches a super- hydrophobicity level.
Embodiment 5 a. taking 5g of bamboo pulp (absolutely dry), defibering for 8min, filtering to remove moisture to be processed; b. dissolving alkali lignin in DMF to prepare an alkali lignin solution with mass fraction of 15%, dissolving sodium methoxide in ethanol to prepare a sodium methoxide solution with mass fraction of 6%, slowly mixing the alkali lignin solution with the sodium methoxide solution, heating to 150°C under the protection of nitrogen, then slowly adding cetyl trimethoxy silane with mass fraction of 16%, reacting and stirring for 2h to form a steady modified alkali lignin solution; settling and separating out modified alkali lignin with ethanol to obtain an alkali lignin modifier which is then dried for later use; and c. dissolving the alkali lignin modifier in DMF to prepare an alkali lignin modifier solution with mass fraction of 15%, soaking the bamboo pulp fiber after being processed in a in the alkali lignin modifier solution, stirring for 5h at room temperature and then adding 0.05% chitosan, papermaking beating degree being 45°SR and mass percent of paper pulp being 35%, and drying to obtain a micro- nano modified and alkali lignin modified paper, the surface contact angle of which reaching 151°, which reaches a super-hydrophobicity level.
Embodiment 6 a. taking 5g of sugarcane pulp {absolutely dry), defibering for 5min, filtering to remove moisture to be processed; b. dissolving alkali lignin in DMF to prepare an alkali lignin solution with mass fraction of 5%, dissolving sodium methoxide in ethanol to prepare a sodium methoxide solution with mass fraction of 4%, slowly mixing the alkali lignin solution with the sodium methoxide solution, heating to 180°C under the protection of nitrogen, then slowly adding octadecyl trimethoxy silane with mass fraction of 20%, reacting and stirring for 10h to form a steady modified alkali lignin solution; settling and separating out modified alkali lignin with ethanol to obtain an alkali lignin modifier which is then dried for later use; and c. dissolving the alkali lignin modifier in DMF to prepare an alkali lignin modifier solution with mass fraction of 12%, soaking the sugarcane pulp fiber after being processed in a in the alkali lignin modifier solution, stirring for 4h at room temperature and then adding 0.2% chitosan, papermaking beating degree being 50°SR and mass percent of paper pulp being 40%, and drying to obtain a micro- nano modified and alkali lignin modified paper, the surface contact angle of which reaching 155°, which reaches a super-hydrophobicity level. Detection experiment is performed on the mechanical properties of paper, table 1 is a physical and mechanical property table of super-hydrophobic paper.
Table 1 Samples Compressive Burst index Tearing Folding strength (KN/M2) | (kPa m?/g) strength number Embodiment | 12.6 8.137 18.981 3189 OO hl Embodiment | 11.6 7.891 16.678 2915 Oe Embodiment | 10.89 7.589 15.889 2600 em Oe Pe Embodiment | 11.78 8.087 17.785 2998 Oe Embodiment | 11.07 7.995 17.077 2890 Sne i Embodiment | 10.98 7.789 16.876 2789 ee It is known from table 1 that the physical-mechanical properties of paper are greatly improved after chitosan is added.
In embodiment 1, mechanical properties of raw paper are compared with those of super-hydrophobic paper.
Table 2 is comparison of mechanical properties of raw paper of neediebush pulp and super-hydrophobic paper of embodiment 1. Table 2 Compressive strength Samples Compressive Burst index Tearing Folding strength (KN/M2) | (kPa-m?/g) strength number Super- 12.6 8.137 18.981 3189 hydrophobic paper It is known from table 2 that the physical-mechanical properties of paper are greatly promoted by modification, thereby providing more powerful durability in the problem of transportation in the future.
Table 3 is comparison of mechanical properties of raw paper of hardwood pulp and super-hydrophobic paper of embodiment 2.
Table 3 Samples Compressive Burst index Tearing Folding strength (KN/M2) | (kPa m?3/g) strength number (mN-m2/g) Super- 11.6 7.891 16.678 2915 hydrophobic paper Table 4 is comparison of mechanical properties of raw paper of straw pulp and super-hydrophobic paper of embodiment 3. Table 4 Samples Compressive Burst index Tearing Folding strength (KN/M2) | (kPa-m?/g) strength number (mN:m?/9) Super- 10.89 7.589 15.889 2600 hydrophobic oe Table 5 is comparison of mechanical properties of raw paper of straw pulp and waste paper pulp and super-hydrophobic paper of embodiment 4. Table 5 Samples Compressive Burst index Tearing Folding strength (KN/M2) | {(kPa:m2?/g) strength number en ag, Super- 11.78 8.087 17.785 2998 hydrophobic = Ge Table 6 is comparison of mechanical properties of raw paper of bamboo pulp and super-hydrophobic paper of embodiment 5. Table6 Samples Compressive Burst index Tearing Folding strength (KN/M?2) | (kPa-m?/g) strength number |
Super- 11.07 7.995 17.077 2890 hydrophobic paper Table 7 is comparison of mechanical properties of raw paper of straw pulp and waste paper pulp and super-hydrophobic paper of embodiment 6. Table 7 Samples Compressive Burst index Tearing Folding strength (KN/M?2) | (kPa -m?/g) strength number (mN-m?/q) Super- 10.98 7.789 16.876 2789 hydrophobic paper Application of a polar solvent and an initiator of alkali lignin are flexibly combined according to actual conditions on the premise of not departing from the technical scheme of the present invention, the surface contact angle of obtained paper reaches 150° and above, and the obtained paper belongs to super- hydrophobic paper, with compressive strength all reaching more than 10KN/M?2, burst index all reaching more than 7kPa'm?/g, tearing strength all reaching more than 15mN-m?/g, and folding numbers all exceeding 2500. Other reagents used in the present invention are all reagents that may be purchased or prepared in the prior art, and are not further described herein.
The foregoing embodiments are merely preferred embodiments for sufficiently describing the present invention, and the protection scope of the present invention is not limited herein.
Equivalent substitution or transformation made by technicians of the technical field on the basis of the present invention all fall within the protection scope of the present invention.
The protection scope of the present invention should be subject to the claims.
Claims (10)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910547030.7A CN110241648B (en) | 2019-06-24 | 2019-06-24 | Preparation method of lignin-chitosan-based fluorine-free high-strength super-hydrophobic paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL2025890A NL2025890A (en) | 2021-01-26 |
| NL2025890B1 true NL2025890B1 (en) | 2022-05-24 |
Family
ID=67888962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2025890A NL2025890B1 (en) | 2019-06-24 | 2020-06-23 | Preparation method of lignin-chitosan based fluoride-free high-strength super-hydrophobic paper |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN110241648B (en) |
| AU (1) | AU2020101037A4 (en) |
| NL (1) | NL2025890B1 (en) |
| ZA (1) | ZA202002969B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115584657B (en) * | 2021-07-06 | 2024-04-12 | 中国科学院理化技术研究所 | Hydrophobic slurry and preparation method and application thereof |
| CN113583438B (en) * | 2021-08-06 | 2023-06-09 | 海南金海浆纸业有限公司 | Biodegradable alkali lignin composite material, preparation method and application thereof |
| CN113756127A (en) * | 2021-09-22 | 2021-12-07 | 中国科学院长春应用化学研究所 | Starch-based hydrophobic paper, and preparation method and application thereof |
| CN114059194B (en) * | 2021-11-25 | 2023-04-18 | 大连工业大学 | Method for directly preparing hydrophobic nanofibers on PCB |
| CN114166818B (en) * | 2021-11-26 | 2022-11-29 | 太原理工大学 | Hydrophobic paper surface-enhanced Raman substrate, preparation method thereof and application thereof in drug detection |
| CN114561827B (en) * | 2022-02-25 | 2023-04-21 | 华南理工大学 | Full biomass-based wax emulsion waterproof coating and preparation method and application thereof |
| CN115012246B (en) * | 2022-07-05 | 2023-06-13 | 齐鲁工业大学 | Biodegradable non-volatile poison bio-based paper coating agent and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105061787B (en) * | 2015-07-29 | 2016-08-17 | 封开县嘉诚纸业有限公司 | A kind of crosslinking alkali lignin and preparation method and application |
| CN107503228B (en) * | 2017-07-25 | 2019-07-16 | 昆明理工大学 | A kind of preparation method of the high-intensitive ultra-hydrophobic paper based on LBL self-assembly and thermal induction processing |
| CN109518539A (en) * | 2018-11-08 | 2019-03-26 | 上海纳旭实业有限公司 | Preparation method of modified lignin resin and paper fiber composite material and products thereof and application |
-
2019
- 2019-06-24 CN CN201910547030.7A patent/CN110241648B/en active Active
-
2020
- 2020-05-13 ZA ZA2020/02969A patent/ZA202002969B/en unknown
- 2020-06-18 AU AU2020101037A patent/AU2020101037A4/en not_active Ceased
- 2020-06-23 NL NL2025890A patent/NL2025890B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU2020101037A4 (en) | 2020-07-23 |
| CN110241648A (en) | 2019-09-17 |
| NL2025890A (en) | 2021-01-26 |
| ZA202002969B (en) | 2021-06-30 |
| CN110241648B (en) | 2021-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NL2025890B1 (en) | Preparation method of lignin-chitosan based fluoride-free high-strength super-hydrophobic paper | |
| NL2025891B1 (en) | Preparation method of super-hydrophobic lignin sponge with oil-water separation function | |
| Hamzeh et al. | Pre-extraction of hemicelluloses from bagasse fibers: Effects of dry-strength additives on paper properties | |
| Latip et al. | Structural and morphological studies on alkaline pre-treatment of oil palm empty fruit bunch (OPEFB) fiber for composite production | |
| FI126649B (en) | New process for the preparation of microcellulose | |
| CN107746584B (en) | Preparation method of waterproof cellophane | |
| CN110272682B (en) | Preparation method of lignin/resin super-hydrophobic insulating corrosion-resistant coating | |
| Kumneadklang et al. | Characterization of cellulose fiber isolated from oil palm frond biomass | |
| Rehman et al. | Ecofriendly isolation of cellulose from eucalyptus lenceolata: A novel approach | |
| Gao et al. | Steam Explosion and Alkali-Oxygen Combined Effect for Degumming of Kenaf Fiber. | |
| Chen et al. | Microscopic structural features and properties of single fibers from different morphological parts of the windmill palm | |
| Gominho et al. | The effect of different pre-treatments to improve delignification of eucalypt stumps in a biorefinery context | |
| Megashah et al. | Characteristics of cellulose from oil palm mesocarp fibres extracted by multi-step pretreatment methods | |
| Ting | Comparative properties analysis between microcrystalline cellulose and cellulose nanocrystals extracted from rice straw | |
| Zahari et al. | Enhanced performance of cellulose from palm oil empty fruit bunch (EFB) via acetylation and silylation | |
| CN105367669B (en) | A kind of preparation method of high oil absorption flaxen fiber element | |
| Nguyen et al. | Treatment of Water Hyacinth Fibers to Improve Mechanical and Microstructural Properties of Green Composite Materials | |
| CN114044836A (en) | Method for extracting hemicellulose from chemical pulp | |
| CN114014957A (en) | Method for extracting hemicellulose from waste paper | |
| CN109972403A (en) | Processing method of plant fiber | |
| CN107075799B (en) | The preparation method of cellulose | |
| Ek et al. | WOBAMA–Wood based materials and fuels | |
| CN114703668B (en) | Fiber and preparation method and application thereof | |
| Akmalaiuly et al. | Vegetable raw materials for the production of fibrous semi-finished products | |
| Parasuram et al. | Morphological, structural and thermal characterization of acetic acid modified and unmodified napier grass fiber strands |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Lapsed because of non-payment of the annual fee |
Effective date: 20230701 |