CN110359321A - A kind of method that nano-cellulose/PVA mixed slurry prepares fruit tray - Google Patents

A kind of method that nano-cellulose/PVA mixed slurry prepares fruit tray Download PDF

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Publication number
CN110359321A
CN110359321A CN201910536999.4A CN201910536999A CN110359321A CN 110359321 A CN110359321 A CN 110359321A CN 201910536999 A CN201910536999 A CN 201910536999A CN 110359321 A CN110359321 A CN 110359321A
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China
Prior art keywords
cellulose
nano
pva
added
fruit tray
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CN201910536999.4A
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Chinese (zh)
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CN110359321B (en
Inventor
陈华
童树华
孟育
倪永浩
何志斌
陈杰
华飞果
查全磬
耿兴莲
吴帅
徐玉清
詹卫民
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Zhejiang Jinchang Specialty Paper Co Ltd
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Zhejiang Jinchang Specialty Paper Co Ltd
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Priority to CN201910536999.4A priority Critical patent/CN110359321B/en
Publication of CN110359321A publication Critical patent/CN110359321A/en
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D21C9/005—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives organic compounds
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
    • D21H11/18—Highly hydrated, swollen or fibrillatable fibres
    • 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
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J5/00—Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention relates to the methods that a kind of nano-cellulose/PVA mixed slurry prepares fruit tray, this method is to disperse microcrystalline cellulose in deionized water, and it is added 2,2,6,6- tetramethyl piperidine -1- oxygroups and NaBr carry out magnetic agitation again, a NaClO is added in per half an hour, the microcrystalline cellulose aoxidized, by centrifuge washing microcrystalline cellulose, nano-cellulose of dialysing to obtain；PVA is added to heating water bath in dimethyl sulfoxide and the mixed solvent system of deionized water and obtains PVA solution；It is added in slurry after nanofiber is mixed with PVA solution, then is made through vacuum filtration, thermocompression forming, transfer trimming.Using the present invention, microcrystalline cellulose is made to mix to be then added in slurry with PVA material after nano-cellulose and prepares fruit tray, has better water-resistance and physical strength, simultaneously, the fruit tray degradation material and safe and harmless of slurry preparation, it is environmentally protective.

Description

A kind of method that nano-cellulose/PVA mixed slurry prepares fruit tray
Technical field
The present invention relates to the methods that a kind of nano-cellulose/PVA mixed slurry prepares fruit tray.
Background technique
More and more important for the theory of our times green and environmental protection, people increasingly pay attention to for green safe, respectively All advance in the theory for thinking environmentally protective sustainable development in a field.Fruit tray currently on the market is using plastics material mostly Expect, not only non-degradable, but also is runed counter to sustainable development idea.Therefore, it now invented a kind of fiber fruit tray, but make Standby fiber fruit tray is all lacking in water-resistance and physical strength, this utilizes nano-cellulose PVA material and slurry Mixing prepare fruit tray again and can be enhanced be fruit tray water-resistance and physical strength performance.Nano-cellulose PVA mixing Slurry prepare fruit tray preparation will bring great convenience to people's lives, while will also bring significant economic benefit and Social benefit.
Summary of the invention
The purpose of the present invention is to the deficiencies of existing fiber fruit tray product, and water-resistance and physics can be enhanced by providing The method that a kind of nano-cellulose/PVA mixed slurry of strength character prepares fruit tray.
The technical solution adopted by the present invention is that: a kind of method that nano-cellulose/PVA mixed slurry prepares fruit tray, It is characterized in that it includes the following steps:
(1) in deionized water by microcrystalline cellulose dispersion, and 2 are added thereto, 2,6,6- tetramethyl piperidine -1- oxygroups and NaBr；
(2) said mixture is subjected to magnetic agitation, while per half an hour is added a NaClO and is added several into mixture Microcrystalline cellulose that is secondary, being aoxidized；
(3) microcrystalline cellulose for being aoxidized the water washing of deoxidation by centrifugation, dialysis, then obtains nano-cellulose；
(4) 4g~5gPVA is added in dimethyl sulfoxide and the mixed solvent system of deionized water, and carries out heating water bath and obtains It is spare to PVA solution；
(5) nanofiber that step (3) obtains is added in the PVA solution that step (4) obtains and is further mixed, obtained Mixed liquor is added in slurry, obtains mixed slurry；
(6) mixed slurry is sent to molding machine, molding fruit tray product is made through vacuum filtration, thermocompression forming, transfer trimming.
The method that a kind of nano-cellulose/PVA mixed slurry prepares fruit tray, it is characterised in that step (1) Are as follows: by concentration be 1.5%~2% microcrystalline cellulose be dispersed in 450ml ~ 550ml deionized water, and thereto be added 90~ 2,2,6,6- tetramethyl piperidine -1- the oxygroup and 100~200ml concentration of 110mg is 1~2%NaBr.
The method that a kind of nano-cellulose/PVA mixed slurry prepares fruit tray, it is characterised in that step (2) Are as follows: mixture obtained by step (1) is subjected to magnetic agitation under 600~700rpm speed, while per half an hour into mixture The NaClO that 10~12ml concentration is 10~15% is added, maintaining PH is 11~12, and reacting after 3~4h terminates.
The method that a kind of nano-cellulose/PVA mixed slurry prepares fruit tray, it is characterised in that step (3) Washing times are preferably 3~5 times, and dialysis time is preferably 60~80h.
The method that a kind of nano-cellulose/PVA mixed slurry prepares fruit tray, it is characterised in that step (4) The mixed solvent system of dimethyl sulfoxide (DMSO) and deionized water, the wherein liquor ratio of dimethyl sulfoxide and deionized water It is preferably 2 ︰ 1, the PVA concentration in mixture is preferably 8~12%.
The method that a kind of nano-cellulose/PVA mixed slurry prepares fruit tray, it is characterised in that step (4) Bath temperature be preferably 80~100 DEG C, heating time is preferably 2~4h.
The method that a kind of nano-cellulose/PVA mixed slurry prepares fruit tray, it is characterised in that step (5) The solid-to-liquid ratio of middle mixed liquor and over dry slurry is 1 ︰ 1000.
Using the present invention, microcrystalline cellulose is made after nano-cellulose and is mixed to get mixed liquor with PVA material, is added Fruit tray is prepared into slurry, has better water-resistance and physical strength, meanwhile, the fruit tray of slurry preparation can drop Material and safe and harmless is solved, it is environmentally protective.
Specific embodiment
The present invention will be further described below in conjunction with the embodiments, but the scope of protection of present invention is not limited to reality Apply the range of example expression.
Embodiment, the method that the nano-cellulose/PVA mixed slurry prepares fruit tray include the following steps.
1, the microcrystalline cellulose that concentration is 1.5%~2% is dispersed in 450ml ~ 550ml deionized water, and thereto 2,2,6,6- tetramethyl piperidine -1- the oxygroup (TEMPO) and 100~200ml concentration that 90~110mg is added are 1~2%NaBr.
2, mixture obtained by step (1) is subjected to magnetic agitation under 600~700rpm speed, while every into mixture The NaClO that 10~12ml concentration is 10~15% is added in half an hour, and maintaining PH is 11~12, and reacting after 3~4h terminates.
3, it by being centrifuged the microcrystalline cellulose for aoxidizing the water washing of deoxidation, dialyses 3~5 times, dialysis time is 60~ Then 80h obtains nano-cellulose.
4,4g~5gPVA is added in dimethyl sulfoxide and the mixed solvent system of deionized water, and carries out water-bath and adds Heat obtains that PVA solution is spare, and wherein the liquor ratio of dimethyl sulfoxide and deionized water is 2 ︰ 1, the PVA concentration in mixture Preferably 8~12%, bath temperature is 80~100 DEG C, and heating time is preferably 2~4h.
5, it will be mixed in PVA solution that obtained nanofiber is added and further, obtained mixed liquor is added to In slurry, mixed slurry is obtained；The solid-to-liquid ratio of mixed liquor and over dry slurry is 1 ︰ 1000.
6, mixed slurry is pumped to molding machine with pipeline, molding is made through vacuum filtration, thermocompression forming, transfer trimming Fruit tray product.

Claims (7)

1. the method that a kind of nano-cellulose/PVA mixed slurry prepares fruit tray, it is characterised in that it includes the following steps:
(1) in deionized water by microcrystalline cellulose dispersion, and 2 are added thereto, 2,6,6- tetramethyl piperidine -1- oxygroups and NaBr；
(2) said mixture is subjected to magnetic agitation, while per half an hour is added a NaClO and is added several into mixture Microcrystalline cellulose that is secondary, being aoxidized；
(3) microcrystalline cellulose for being aoxidized the water washing of deoxidation by centrifugation, dialysis, then obtains nano-cellulose；
(4) 4g~5gPVA is added in dimethyl sulfoxide and the mixed solvent system of deionized water, and carries out heating water bath and obtains It is spare to PVA solution；
(5) nanofiber that step (3) obtains is added in the PVA solution that step (4) obtains and is further mixed, obtained Mixed liquor is added in slurry, obtains mixed slurry；
(6) mixed slurry is sent to molding machine, molding fruit tray product is made through vacuum filtration, thermocompression forming, transfer trimming.
2. the method that a kind of nano-cellulose/PVA mixed slurry according to claim 1 prepares fruit tray, feature It is step (1) are as follows: the microcrystalline cellulose that concentration is 1.5%~2% is dispersed in 450ml ~ 550ml deionized water, and to 2,2,6,6- tetramethyl piperidine -1- the oxygroup and 100~200ml concentration that 90~110mg is wherein added are 1~2%NaBr.
3. the method that a kind of nano-cellulose/PVA mixed slurry according to claim 1 prepares fruit tray, feature It is step (2) are as follows: mixture obtained by step (1) is subjected to magnetic agitation under 600~700rpm speed, while to mixture In per half an hour the NaClO that 10~12ml concentration is 10~15% is added, maintaining PH is 11~12, reacts knot after 3~4h Beam.
4. the method that a kind of nano-cellulose/PVA mixed slurry according to claim 1 prepares fruit tray, feature It is that step (3) washing times are preferably 3~5 times, dialysis time is preferably 60~80h.
5. the method that a kind of nano-cellulose/PVA mixed slurry according to claim 1 prepares fruit tray, feature Be the mixed solvent system of dimethyl sulfoxide (DMSO) and deionized water described in step (4), wherein dimethyl sulfoxide with go The liquor ratio of ionized water is 2 ︰ 1, and the PVA concentration in mixture is preferably 8~12%.
6. the method that a kind of nano-cellulose/PVA mixed slurry according to claim 1 prepares fruit tray, feature The bath temperature for being step (4) is preferably 80~100 DEG C, and heating time is preferably 2~4h.
7. the method that a kind of nano-cellulose/PVA mixed slurry according to claim 1 prepares fruit tray, feature It is that the solid-to-liquid ratio of mixed liquor and over dry slurry is 1 ︰ 1000 in step (5).
CN201910536999.4A 2019-06-20 2019-06-20 Method for preparing fruit tray by nano-cellulose/PVA mixed slurry Active CN110359321B (en)

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Application Number Priority Date Filing Date Title
CN201910536999.4A CN110359321B (en) 2019-06-20 2019-06-20 Method for preparing fruit tray by nano-cellulose/PVA mixed slurry

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06322699A (en) * 1993-05-12 1994-11-22 Utsui:Kk Production of article formed by paper-making process
CN105178009A (en) * 2015-08-07 2015-12-23 哈尔滨工业大学 Preparation method of nanocellulose/oxidized regenerated cellulose composite hemostatic material
CN105175557A (en) * 2015-08-21 2015-12-23 广西大学 Preparation method of nano cellulose
CN105568730A (en) * 2015-12-21 2016-05-11 同济大学 Method for preparing renewable nano-celluloses
CN107511770A (en) * 2017-09-29 2017-12-26 衢州学院 A kind of high temperature is sub- to be melted from adhesion abrasive grain abrasive tools preparation method
CN107841906A (en) * 2017-11-02 2018-03-27 江南大学 A kind of sludge base moulded paper pulp product and preparation method thereof
CN108276617A (en) * 2018-01-12 2018-07-13 东北林业大学 A kind of preparation method of quaternized TEMPO oxidation nanometers cellulose/curcumin/PVA/ tara gum active packing films
CN109629302A (en) * 2018-11-30 2019-04-16 浙江金昌特种纸股份有限公司 A kind of preparation method of food-grade disposable product

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06322699A (en) * 1993-05-12 1994-11-22 Utsui:Kk Production of article formed by paper-making process
CN105178009A (en) * 2015-08-07 2015-12-23 哈尔滨工业大学 Preparation method of nanocellulose/oxidized regenerated cellulose composite hemostatic material
CN105175557A (en) * 2015-08-21 2015-12-23 广西大学 Preparation method of nano cellulose
CN105568730A (en) * 2015-12-21 2016-05-11 同济大学 Method for preparing renewable nano-celluloses
CN107511770A (en) * 2017-09-29 2017-12-26 衢州学院 A kind of high temperature is sub- to be melted from adhesion abrasive grain abrasive tools preparation method
CN107841906A (en) * 2017-11-02 2018-03-27 江南大学 A kind of sludge base moulded paper pulp product and preparation method thereof
CN108276617A (en) * 2018-01-12 2018-07-13 东北林业大学 A kind of preparation method of quaternized TEMPO oxidation nanometers cellulose/curcumin/PVA/ tara gum active packing films
CN109629302A (en) * 2018-11-30 2019-04-16 浙江金昌特种纸股份有限公司 A kind of preparation method of food-grade disposable product

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