CN114395139A - Modified lignin suitable for fully-degradable membrane bags and preparation method thereof - Google Patents
Modified lignin suitable for fully-degradable membrane bags and preparation method thereof Download PDFInfo
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- CN114395139A CN114395139A CN202210037495.XA CN202210037495A CN114395139A CN 114395139 A CN114395139 A CN 114395139A CN 202210037495 A CN202210037495 A CN 202210037495A CN 114395139 A CN114395139 A CN 114395139A
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- lignin
- modified lignin
- chloride
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- degradable membrane
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- 229920005610 lignin Polymers 0.000 title claims abstract description 76
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000012528 membrane Substances 0.000 title claims abstract description 11
- 239000003054 catalyst Substances 0.000 claims abstract description 14
- 150000001263 acyl chlorides Chemical class 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 238000012986 modification Methods 0.000 claims abstract description 5
- 230000004048 modification Effects 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- MLQBTMWHIOYKKC-KTKRTIGZSA-N (z)-octadec-9-enoyl chloride Chemical compound CCCCCCCC\C=C/CCCCCCCC(Cl)=O MLQBTMWHIOYKKC-KTKRTIGZSA-N 0.000 claims description 4
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 claims description 4
- WTBAHSZERDXKKZ-UHFFFAOYSA-N octadecanoyl chloride Chemical compound CCCCCCCCCCCCCCCCCC(Cl)=O WTBAHSZERDXKKZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000967 suction filtration Methods 0.000 claims description 4
- 238000003916 acid precipitation Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 claims description 2
- NQGIJDNPUZEBRU-UHFFFAOYSA-N dodecanoyl chloride Chemical compound CCCCCCCCCCCC(Cl)=O NQGIJDNPUZEBRU-UHFFFAOYSA-N 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- ARBOVOVUTSQWSS-UHFFFAOYSA-N hexadecanoyl chloride Chemical compound CCCCCCCCCCCCCCCC(Cl)=O ARBOVOVUTSQWSS-UHFFFAOYSA-N 0.000 claims description 2
- REEZZSHJLXOIHL-UHFFFAOYSA-N octanoyl chloride Chemical compound CCCCCCCC(Cl)=O REEZZSHJLXOIHL-UHFFFAOYSA-N 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims 1
- 235000011114 ammonium hydroxide Nutrition 0.000 claims 1
- 239000004594 Masterbatch (MB) Substances 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 abstract 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000000227 grinding Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 235000021355 Stearic acid Nutrition 0.000 description 3
- 238000000071 blow moulding Methods 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 238000010096 film blowing Methods 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000008117 stearic acid Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 polybutylene terephthalate Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- AXKZIDYFAMKWSA-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione Chemical compound O=C1CCCCC(=O)OCCCCO1 AXKZIDYFAMKWSA-UHFFFAOYSA-N 0.000 description 1
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004597 plastic additive Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000010298 pulverizing process Methods 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C08J2497/00—Characterised by the use of lignin-containing materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Polymers & Plastics (AREA)
- Mechanical Engineering (AREA)
- Biochemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Biological Depolymerization Polymers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention relates to the field of lignin modification, in particular to modified lignin suitable for a fully degradable membrane bag and a preparation method thereof, wherein the preparation method comprises the following steps: and (2) putting a proper amount of dried lignin into a kneader, uniformly stirring, heating to a proper temperature, adding an acyl chloride esterifying agent, adding a catalyst, reacting for a certain time, cooling and discharging. And cooling and discharging after the reaction is finished. The modified lignin has good compatibility with the biodegradable master batch, the mechanical property of the synthetic biodegradable film bag is excellent, the high-value utilization of the lignin can be realized, the preparation cost of the composite material is effectively reduced, and the market competitiveness is improved.
Description
Technical Field
The invention relates to the field of lignin modification, in particular to modified lignin suitable for a fully degradable membrane bag and a preparation method thereof.
Background
In recent years, petroleum energy problems and environmental pollution problems are attracting social attention. Traditional PE and PP polyolefin materials are synthesized from non-renewable fossil energy, and the non-renewable resources are gradually decreased with the increase of the demand of plastics; secondly, after the traditional plastics are used, the traditional plastics are generally treated in a landfill or incineration mode, so that white pollution is caused, and the environmental hazard is more and more serious, therefore, the development and the use of renewable and biodegradable materials are very important.
The lignin is a natural aromatic compound with the largest reserve in nature, and has the properties of thermal stability, biodegradability, ultraviolet resistance, oxidation resistance and the like. Lignin is a byproduct of pulping and papermaking and bioethanol industry, is cheap and easily available, but most of lignin is directly combusted to provide energy for factories.
The biodegradable composite material prepared by blending lignin and PBAT not only can reduce the price of the PBAT material, but also can realize high-value utilization of lignin. In industrial production, a plastic additive is usually required to be added to improve the compatibility, but the addition amount of lignin is still small, and the addition amount of the lignin is improved by modifying the lignin, so that the price of the composite material is effectively reduced, and the composite material has a very good application prospect.
Disclosure of Invention
The invention provides modified lignin suitable for a fully degradable membrane bag and a preparation method thereof, and aims to solve the technical problems of the prior art.
In order to solve the above problems, the present invention provides the following technical solutions: the modified lignin suitable for the fully degradable film bag comprises the following components in parts by weight: 100 parts of lignin, 5-40 parts of acyl chloride esterifying agent and 1-5 parts of catalyst.
Preferably, the specific preparation steps are as follows:
step one, lignin modification, namely, putting a proper amount of dried lignin into a kneader, rotating at the speed of 200 and 300 revolutions, and heating to 50-80 ℃. And (3) after the temperature is stable, slowly spraying the catalyst and the acyl chloride esterifying agent on the surface of the reaction material in sequence, uniformly and fully contacting the materials, reacting for 1-3h, cooling after the reaction is finished, and discharging.
And step two, placing the modified lignin in a 50 ℃ oven for 24-48 h, and crushing by using a crushing agent.
Preferably, in the step (1), the lignin source is obtained by an acid precipitation method, the papermaking black liquor is subjected to heat preservation at 40-60 ℃, the pH value of a system is adjusted to 3-4, and the papermaking black liquor is subjected to suction filtration, cleaning, suction filtration again, drying and crushing.
Preferably, the acyl chloride esterifying agent in the step (1) is one or more of stearoyl chloride, lauroyl chloride, hexadecanoyl chloride, oleoyl chloride and octanoyl chloride.
Preferably, the molar ratio of the lignin unit to the acid chloride in the step (1) is 1: 1-5.
Preferably, in the step (1), the catalyst is one or more of ammonia, triethylamine, diethylamine, pyrimidine and sodium hydroxide. The molar ratio of lignin units to catalyst is 1: 0.2-1.
Preferably, the particle size of the modified lignin after pulverization by the pulverizer in the step (2) is 10 μm or less.
Compared with the prior art, the invention has the beneficial effects that: the modified lignin has good compatibility with the biodegradable master batch, the mechanical property of the synthetic biodegradable film bag is excellent, the high-value utilization of the lignin can be realized, the preparation cost of the composite material is effectively reduced, and the market competitiveness is improved.
Detailed Description
Taking a proper amount of dried lignin, putting the lignin into a kneader, rotating at the speed of 200 and 300 turns, and heating to 50-80 ℃. Adding acyl chloride esterifying agent and catalyst, reacting for 1-3h, cooling and discharging after the reaction. Placing the modified lignin in a 50 ℃ oven for 24-48 h, and crushing.
Example 1
200g of dried lignin is put into a kneader, the rotation speed is 240 r, and the temperature is increased to 80 ℃. Adding stearoyl chloride in a molar ratio of the lignin unit to the acyl chloride of 1:1, adding triethylamine catalyst in a molar ratio of the lignin unit to the triethylamine of 1:0.5, reacting for 3 hours, and cooling and discharging after the reaction is finished. Putting the modified lignin in an oven at 50 ℃ for 48h, and grinding the lignin to a particle size of less than 10 mu m.
Example 2
200g of dried lignin is put into a kneader, the rotation speed is 240 r, and the temperature is raised to 70 ℃. Adding stearoyl chloride in a molar ratio of the lignin unit to the acyl chloride of 1:1, adding triethylamine catalyst in a molar ratio of the lignin unit to the triethylamine of 1:0.5, reacting for 3 hours, and cooling and discharging after the reaction is finished. Putting the modified lignin in an oven at 50 ℃ for 48h, and grinding the lignin to a particle size of less than 10 mu m.
Example 3
200g of dried lignin is put into a kneader, the rotation speed is 240 r, and the temperature is increased to 80 ℃. Adding oleoyl chloride in a molar ratio of the lignin unit to the acyl chloride of 1:3, adding a pyrimidine catalyst in a molar ratio of the lignin unit to the pyrimidine of 1:0.5, reacting for 2 hours, and cooling and discharging after the reaction is finished. Putting the modified lignin in an oven at 50 ℃ for 48h, and grinding the lignin to a particle size of less than 10 mu m.
Example 4
200g of dried lignin is put into a kneader, the rotation speed is 240 r, and the temperature is increased to 80 ℃. Adding oleoyl chloride in a molar ratio of the lignin unit to the acyl chloride of 1:2, adding triethylamine catalyst in a molar ratio of the lignin unit to the triethylamine of 1:1, reacting for 1h, and cooling and discharging after the reaction is finished. Putting the modified lignin in an oven at 50 ℃ for 48h, and grinding the lignin to a particle size of less than 10 mu m.
Application effect implementation
1. Putting the modified lignin, degradable substance degradable resin PBAT (polybutylene terephthalate/adipate), calcium carbonate, glycerol, DCP (dicumyl peroxide) and stearic acid into a high-speed blender together, and mixing for 50min at the rotating speed of 200rpm to obtain a primary mixture. The composition and the content are as follows according to the mass portion:
2. and (3) putting the primary mixture into a double-screw extruder for extrusion granulation, wherein the temperature from the first zone to the sixth zone is 175 ℃, 180 ℃, 185 ℃, 190 ℃, 195 ℃, 190 ℃ of the head temperature, and 190rpm of the screw, and performing melt extrusion to obtain the master batch.
3. And (3) putting the master batch into a film blowing machine, and carrying out blow molding bag making and molding at 195 ℃ to prepare the fully degradable film bag.
Comparative example 1
The fully degradable bag film comprises the following components in parts by weight:
the above formula is reacted according to the following steps:
1. putting the degradable resin PBAT (poly terephthalic acid/butylene adipate), calcium carbonate, glycerol, DCP (dicumyl peroxide) and stearic acid into a high-speed blender together, and mixing for 50min at the rotating speed of 200rpm to obtain a primary mixture.
2. And (3) putting the primary mixture into a double-screw extruder for extrusion granulation, wherein the temperature from the first zone to the sixth zone is 175 ℃, 180 ℃, 185 ℃, 190 ℃, 195 ℃, 190 ℃ of the head temperature, and 190rpm of the screw, and performing melt extrusion to obtain the master batch.
3. And (3) putting the master batch into a film blowing machine, and carrying out blow molding bag making and molding at 195 ℃ to prepare the fully degradable film bag.
Comparative example 2
The total degradation and the preparation method thereof comprise the following components in parts by weight:
the above formula is reacted according to the following steps:
1. putting the degradable substance degradable resin PBAT (polybutylene terephthalate/adipate), unmodified lignin powder, calcium carbonate, glycerol, DCP (dicumyl peroxide) and stearic acid into a high-speed blender together, and mixing for 40min at the rotating speed of 400rpm to obtain a primary mixture.
2. And (3) putting the primary mixture into a double-screw extruder for extrusion granulation, wherein the temperature from the first zone to the sixth zone is 160 ℃, 170 ℃, 175 ℃, 180 ℃, 155 ℃, 1185 ℃ at the head temperature, and the screw rotation speed is 200rpm, and performing melt extrusion to obtain the master batch.
3. And (3) putting the master batch into a film blowing machine, and carrying out blow molding bag making and molding at 185 ℃ to prepare the fully degradable film bag.
The performance of examples 1-4 and comparative examples was tested by a universal electronic tensile tester (model KY 8000C) according to the standard (GB/T1040.2-2006), and the specific data are shown in Table 1.
| Tensile strength/MPa | Elongation at break/% | |
| Example 1 | 18.2 | 350.3 |
| Example 2 | 18.9 | 355.0 |
| Example 3 | 17.8 | 345.2 |
| Example 4 | 17.5 | 352.8 |
| Comparative example 1 | 18.5 | 349.1 |
| Comparative example 2 | 16.0 | 331.9 |
TABLE 1
The results of the data in table 1 show that the lignin modified by extracting the papermaking waste liquid is suitable for the data display of the tensile property and the impact property of the fully-degradable film bag, and the lignin modified by extracting the papermaking waste liquid can meet the use requirements.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The modified lignin suitable for the fully degradable film bag is characterized by comprising the following components in parts by weight: 100 parts of lignin, 5-40 parts of acyl chloride esterifying agent and 1-5 parts of catalyst.
2. The preparation method of the modified lignin suitable for the fully degradable membrane bags according to claim 1, which comprises the following specific preparation steps:
step one, lignin modification, namely, putting a proper amount of dried lignin into a kneader, rotating at the speed of 200 and 300 revolutions, and heating to 50-80 ℃. And (3) after the temperature is stable, slowly spraying the catalyst and the acyl chloride esterifying agent on the surface of the reaction material in sequence, uniformly and fully contacting the materials, reacting for 1-3h, cooling after the reaction is finished, and discharging.
And step two, placing the modified lignin in a 50 ℃ oven for 24-48 h, and crushing by using a crushing agent.
3. The method for preparing the modified lignin suitable for the fully degradable membrane bags according to claim 1, wherein the modified lignin comprises the following components in percentage by weight: in the step (1), the lignin source is obtained by an acid precipitation method, the papermaking black liquor is subjected to heat preservation at 40-60 ℃, the pH value of a system is adjusted to 3-4, and the papermaking black liquor is subjected to suction filtration, cleaning, suction filtration again, drying and crushing.
4. The method for preparing the modified lignin suitable for the fully degradable membrane bags according to claim 1, wherein the modified lignin comprises the following components in percentage by weight: the acyl chloride esterifying agent in the step (1) is one or more of stearoyl chloride, lauroyl chloride, hexadecanoyl chloride, oleoyl chloride and octanoyl chloride.
5. The method for preparing the modified lignin suitable for the fully degradable membrane bags according to claim 1, wherein the modified lignin comprises the following components in percentage by weight: the molar ratio of the lignin unit to the acyl chloride in the step (1) is 1: 1-5.
6. The method for preparing the modified lignin suitable for the fully degradable membrane bags according to claim 1, wherein the modified lignin comprises the following components in percentage by weight: in the step (1), the catalyst is one or more of ammonia water, triethylamine, diethylamine, pyrimidine and sodium hydroxide. The molar ratio of lignin units to catalyst is 1: 0.2-1.
7. The method for preparing the modified lignin suitable for the fully degradable membrane bags according to claim 1, wherein the modified lignin comprises the following components in percentage by weight: the particle size of the modified lignin which is crushed by the crusher in the step (2) is below 10 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210037495.XA CN114395139A (en) | 2022-01-13 | 2022-01-13 | Modified lignin suitable for fully-degradable membrane bags and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210037495.XA CN114395139A (en) | 2022-01-13 | 2022-01-13 | Modified lignin suitable for fully-degradable membrane bags and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114933785A (en) * | 2022-04-29 | 2022-08-23 | 上海昶法新材料有限公司 | Modified lignin/PBAT biodegradable plastic and preparation method thereof |
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| CN102093573A (en) * | 2009-12-14 | 2011-06-15 | 武侯区巅峰机电科技研发中心 | Method for preparing modified lignosulfonate |
| CN105111461A (en) * | 2015-09-23 | 2015-12-02 | 广西大学 | Method for preparing lignin ester by mechanical activation- solid reaction |
| CN110615897A (en) * | 2019-09-29 | 2019-12-27 | 北京林业大学 | Microwave-assisted lignin modification method |
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- 2022-01-13 CN CN202210037495.XA patent/CN114395139A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093573A (en) * | 2009-12-14 | 2011-06-15 | 武侯区巅峰机电科技研发中心 | Method for preparing modified lignosulfonate |
| CN105111461A (en) * | 2015-09-23 | 2015-12-02 | 广西大学 | Method for preparing lignin ester by mechanical activation- solid reaction |
| CN110615897A (en) * | 2019-09-29 | 2019-12-27 | 北京林业大学 | Microwave-assisted lignin modification method |
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| Title |
|---|
| 陈小娟等: "木质素酰胺制备的工艺研究", 《中国造纸学报》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114933785A (en) * | 2022-04-29 | 2022-08-23 | 上海昶法新材料有限公司 | Modified lignin/PBAT biodegradable plastic and preparation method thereof |
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