AU2020101037A4 - 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
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- AU2020101037A4 AU2020101037A4 AU2020101037A AU2020101037A AU2020101037A4 AU 2020101037 A4 AU2020101037 A4 AU 2020101037A4 AU 2020101037 A AU2020101037 A AU 2020101037A AU 2020101037 A AU2020101037 A AU 2020101037A AU 2020101037 A4 AU2020101037 A4 AU 2020101037A4
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- 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
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- 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
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- 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
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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
5 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
0 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
5 application prospect and economical benefit in the fields of waterproof protection of transport
package, fresh food cold storage and high-end products.
12
Description
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 W 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 !5 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 octadecyl 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-free 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 !5 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 1500, 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 720cm-1 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.
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 alkali 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:
H3CO-0
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 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 trimethoxysilane 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 lh, 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 5g 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 lh, 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 5g 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 lh, papermaking beating degree being 40SR 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% !5 chitosan, papermaking beating degree being 50°SR and mass percent of paper pulp being 4 0 %, 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 number strength (KN/M 2 ) (kPa-m 2/g) strength 2 (mN-m /g) Embodiment 1 12.6 8.137 18.981 3189 Embodiment 2 11.6 7.891 16.678 2915
Embodiment 3 10.89 7.589 15.889 2600 Embodiment 4 11.78 8.087 17.785 2998 Embodiment 5 11.07 7.995 17.077 2890 Embodiment 6 10.98 7.789 16.876 2789 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 needlebush pulp and super-hydrophobic paper of embodiment 1. Table 2 Compressive strength
Samples Compressive Burst index Tearing Folding strength (KN/M 2 ) (kPa -m2 /g) strength number 2 (mN-m /g) Raw paper 10.01 4.133 12.171 689 Super-hydrophobic 12.6 8.137 18.981 3189 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/M 2 ) (kPa -m2 /g) strength number 2 (mN-m /g) Raw paper 8.03 3.133 14.171 527 Super-hydrophobic 11.6 7.891 16.678 2915 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/M 2 ) (kPa m 2 /g) strength number
(mN-m /g) Raw paper 4.67 1.168 7.171 356 Super-hydrophobic 10.89 7.589 15.889 2600 paper 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/M 2 ) (kPa m 2/g) strength number 2 (mN-m /g) Raw paper 4.09 2.018 9.135 553 Super-hydrophobic 11.78 8.087 17.785 2998 paper Table 6 is comparison of mechanical properties of raw paper of bamboo pulp and super-hydrophobic paper of embodiment 5. Table 6 Samples Compressive Burst index Tearing Folding strength (KN/M 2 ) (kPa m 2/g) strength number 2 (mN-m /g) Raw paper 6.29 3.641 8.927 489 Super-hydrophobic 11.07 7.995 17.077 2890 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 2/g) strength number 2 (mN-m /g) Raw paper 5.09 2.741 7.451 665 Super-hydrophobic 10.98 7.789 16.876 2789 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 1OKN/M 2, burst index all reaching more than 7kPa-m 2 /g, tearing strength all reaching more than 15mN-m 2 /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 (5)
1. 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.
2. The preparation method according to claim 1, wherein dissolving alkali lignin in any polar solvent out of acetone, dioxane, N,N-dimethylformamide and DMSO preferably, wherein slowly adding a triethylamine or sodium alkoxide initiator with mass concentration of 1%-10 % to an obtained alkali lignin solution,
further preferably, wherein 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%- 2 0% to react to obtain a modified alkali lignin solution,
further preferably, wherein the long-chain alkane methoxysilane refers to that from dodecyl trimethylsilane to octadecyl trimethylsilane, preferably, wherein the mass percent of chitosan is 0.01%-0.2%.
3. The preparation method according to claim 1 or claim 2, wherein the paper pulp is one or !5 mixed pulp of several out of needlebush pulp, hardwood pulp, old newpaper or straw pulp, bamboo pulp and sugarcane pulp, preferably, wherein the beating degree of the paper pulp is 300 SR-50 °SR.
4. A lignin-chitosan based fluoride-free high-strength super-hydrophobic paper, being prepared by a preparation method according to any one of claims 1-3.
5. An application implemented by utilizing the lignin-chitosan based fluoride-free high-strength super-hydrophobic paper according to claim 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910547030.7A CN110241648B (en) | 2019-06-24 | 2019-06-24 | Preparation method of lignin-chitosan-based fluorine-free high-strength super-hydrophobic paper |
| CN201910547030.7 | 2019-06-24 |
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| CN (1) | CN110241648B (en) |
| AU (1) | AU2020101037A4 (en) |
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| ZA (1) | ZA202002969B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113583438A (en) * | 2021-08-06 | 2021-11-02 | 海南金海浆纸业有限公司 | Biodegradable alkali lignin composite material, preparation method and application thereof |
| CN114059194A (en) * | 2021-11-25 | 2022-02-18 | 大连工业大学 | Method for directly preparing hydrophobic nanofibers on PCB |
| CN114395938A (en) * | 2021-09-22 | 2022-04-26 | 中国科学院长春应用化学研究所 | Starch-based hydrophobic paper, and preparation method and application thereof |
| CN114561827A (en) * | 2022-02-25 | 2022-05-31 | 华南理工大学 | Full-biomass-based wax emulsion waterproof coating and preparation method and application thereof |
Families Citing this family (3)
| 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 |
| 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 |
| 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
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- 2020-05-13 ZA ZA2020/02969A patent/ZA202002969B/en unknown
- 2020-06-18 AU AU2020101037A patent/AU2020101037A4/en not_active Ceased
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113583438A (en) * | 2021-08-06 | 2021-11-02 | 海南金海浆纸业有限公司 | Biodegradable alkali lignin composite material, 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 |
| CN114395938A (en) * | 2021-09-22 | 2022-04-26 | 中国科学院长春应用化学研究所 | Starch-based hydrophobic paper, and preparation method and application thereof |
| CN114059194A (en) * | 2021-11-25 | 2022-02-18 | 大连工业大学 | Method for directly preparing hydrophobic nanofibers on PCB |
| CN114059194B (en) * | 2021-11-25 | 2023-04-18 | 大连工业大学 | Method for directly preparing hydrophobic nanofibers on PCB |
| CN114561827A (en) * | 2022-02-25 | 2022-05-31 | 华南理工大学 | Full-biomass-based wax emulsion waterproof coating and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
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| ZA202002969B (en) | 2021-06-30 |
| CN110241648B (en) | 2021-11-02 |
| NL2025890B1 (en) | 2022-05-24 |
| NL2025890A (en) | 2021-01-26 |
| CN110241648A (en) | 2019-09-17 |
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