CN108203518A - A kind of preparation method of lignin enhancing PVA expanded materials - Google Patents

A kind of preparation method of lignin enhancing PVA expanded materials Download PDF

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Publication number
CN108203518A
CN108203518A CN201611170026.6A CN201611170026A CN108203518A CN 108203518 A CN108203518 A CN 108203518A CN 201611170026 A CN201611170026 A CN 201611170026A CN 108203518 A CN108203518 A CN 108203518A
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pva
lignin
added
deionized water
expanded
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Inventor
卢佳欣
苟进胜
刘惠
孟星彤
朱子怡
蔡放
孙小琪
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Beijing Forestry University
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Beijing Forestry University
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    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02—Homopolymers or copolymers of unsaturated alcohols
    • C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • 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
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
    • 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
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/18—Binary blends of expanding agents
    • 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
    • C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
    • C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/06—Biodegradable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/14—Applications used for foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2312/00—Crosslinking

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a kind of preparation methods of lignin enhancing PVA expanded materials, first PVA is added in deionized water and is dissolved by heating, alkali lignin, foaming agent are added in into deionized water dissolving afterwards, alkali lignin mixed solution is poured into PVA solution again, crosslinking agent and plasticizer are added in, after a certain period of time, take out mixed solution makes foaming agent foam to stirring in water bath, crosslinking curing in baking oven is placed after stirring evenly, finally washing removes unreacted crosslinking agent and foaming agent.Polyvinyl alcohol foam material is at low cost, biodegradable under field conditions (factors), but mechanical property is not good enough.The present invention by lignin by introducing PVA expanded material systems, the lignin of preparation/PVA expanded materials have good weatherability, chemical stability and biocompatibility, it is degradable, and lignin, plasticizer are introduced into PVA expanded materials, its mechanical property is largely improved, reduces production cost.Such expanded material has good cushion performance and biological degradability, there is huge application value in packaging field.

Description

A kind of preparation method of lignin enhancing PVA expanded materials
Technical field
The present invention relates to a kind of lignin to enhance polyvinyl alcohol（PVA）The preparation method of foamed damping material belongs to compound Material or high molecular foam material field.
Background technology
Amortizing packaging material is broadly divided into Plastic amortizing packaging material and category amortizing packaging material made of paper.Wherein plastics Class amortizing packaging material can be divided into foamed plastics and air cushion plastic film again.Foamed plastics has light, heat-insulated, sound-absorbing, subtracts The characteristics such as shake, can meet numerous requirements in buffering package field well, be most popular a kind of amortizing packaging material.
Traditional foamed plastics, such as expanded polystyrene (EPS)（EPS）, polyethylene foamed（EPE）Etc. petroleum-based products are belonged to, no Energy natural degradation, is the main reason for causing white pollution.Polyethylene foamed alcohol（PVA）Cushion performance is good, biodegradable, It is generally the least expensive biodegradable plastic.It is resistant to less than 30% strong acid, alkaline-resisting, the polyvinyl alcohol contracting first prepared using PVA as raw material Aldehyde foamed material have good wear-resisting weather-proof, chemical stability and biocompatibility, it is degradable, but mechanical property it is poor, It is of high cost, it is difficult to be applied.
With science and technology rapid development, the performance of one-component material is difficult to the needs for meeting production and living.Pass through two kinds Or two or more components pass through composite material prepared by certain technique, material property can be modified, to develop high-performance material Material.
Lignin is a kind of biological material of rich content in nature, is generally exported with papermaking by-product.With phenylpropyl alcohol Alkane is structural unit, and amorphous thermoplastic tridimensional network is combined by ehter bond and C-C keys, has a large amount of different work Property functional group, available for modified polymer material, increases mechanical property and heat resistance of material etc..Lignin and polarity high score The compatibility of sub- material such as polyvinyl chloride, polyvinyl alcohol etc. is preferable, and obtained composite property is excellent and biodegradable, makes The environmental suitability of some high molecular materials is more preferable.
At present, PVA expanded materials research and application focus primarily upon prepared by film, foaming material to its modification using filler On material, CN1095075A discloses a kind of high water absorbency plastic foam and preparation method, is main using polyvinyl alcohol and cornstarch Ingredient adds in aldehyde, sulfuric acid, organic silicon defoamer and surfactant, and high water absorbency plastic foam is prepared by cast molding； CN104292483A discloses a kind of preparations of alkali lignin/PVA every light blend film, spray-dried with Wheat Straw Lignin from Alkali Pulping Alkali lignin/PVA blend films are prepared using physical blending process after alkali lignin, will be formed a film into film liquid by being cast mode； CN103467759 discloses a kind of preparation method of industrial alkali lignin/polyvinyl alcohol crosslinked film, with industrial alkali lignin and Polyvinyl alcohol is raw material, and industrial alkali lignin/polyvinyl alcohol crosslinked reaction film is prepared for using the tape casting after crosslinked dose of crosslinking.
It has not yet to see polyvinyl alcohol and prepares the report of expanded material with lignin, also have no polyvinyl alcohol and lignin Prepare report of the expanded material for packaging field.To overcome polyethylene foamed alcohol mechanical property poor, it is difficult to be applied Shortcoming makes degradable foam materials expand in the application range of packaging field, and the present invention is innovatively by using lignin, increasing The components such as agent enhancing polyvinyl alcohol foam material is moulded, improves its heat resistance, mechanical property and cushion performance.Lignin enhances PVA Expanded material improves the utilization rate of lignin, improves PVA expanded materials poor mechanical property, present situation of high cost, is sent out to PVA Lignin is introduced in foam material can improve the mechanical property of expanded material, increase its heat resistance and toughness.Simultaneously because base material PVA and enhancing component lignin are environmentally friendly material, and enhancing PVA expanded materials by lignin produced by the present invention can Natural degradation and with good cushion performance, is especially suitable for Shockproof packaging, is expected to become new exclusive buffer packaging material Material.
Invention content
The purpose of the present invention is to propose to a kind of preparation methods of lignin enhancing PVA expanded materials.Using PVA as main base material Substance, lignin are modified material, and formaldehyde is crosslinking agent, and sodium bicarbonate, sodium carbonate are foaming agent, plasticizer are added, by molten The heated crosslinking of method of liquid foaming prepares mechanical property and cushion performance is excellent, the enhancing PVA foaming of environmental-friendly lignin Padded coaming, can apply and packaging field.
The present invention proposes a kind of preparation method of lignin enhancing PVA expanded materials, it is characterised in that according to following step It is rapid to carry out：
（1）By PVA masterbatch（The degree of polymerization can be 500-2500, and alcoholysis degree can be 74%-99%）It is dissolved in deionized water, makes Deionized water is 6/1 ~ 14/1 with PVA mass ratioes, and above-mentioned solution temperature is controlled in 90 DEG C of insulated and stirred 1.5h, makes PVA abundant Dissolving；
（2）A certain amount of alkali lignin is weighed, it is made with PVA mass ratioes to be 1/5 ~ 2/5, deionized water is added in and stirs and be allowed to fill Divide dissolving, control deionized water is 4/1 with PVA mass ratioes；
（3）By a certain amount of Na2CO3And NaHCO3It adds in solution made from second step, makes Na2CO3And NaHCO3With PVA mass Than being all 2/25；
（4）By third walk made from mixed solution pour into PVA solution made from the first step, after mixing add in methyl silicon Oil, it is 1/50 to make the mass ratio of methyl-silicone oil and PVA, and it (can be ethylene glycol, polyethylene glycol, glycerine, season penta to add in plasticizer One kind or more in the nano materials such as tetrol, caprolactam, propylene glycol, trimethylolpropane, pentanediol, sorbierite and montmorillonite Kind), it is 1/5-4/5 to make its mass ratio with PVA；Formalin is added, it is 3/25 ~ 47/ to control its mass ratio with PVA 100；
（5）Solution temperature made from 4th step is controlled in 80 DEG C of insulated and stirred 2h, is allowed to fully react；
（6）After reaction, 4molL is added in-1Sulfuric acid solution, it is 31/100 ~ 63/100 to control its mass ratio with PVA, and Stirring is allowed to foam, and foaming body is poured into mold, is placed in 120 DEG C of cross-linking reaction 2h of holding in baking oven；
（7）After the completion of aforesaid operations, sample that water-washing step 6 is prepared removes unreacted formaldehyde and sulfuric acid, in air It spontaneously dries curing and obtains alkali lignin/polyvinyl alcohol foam material.
The present invention proposes a kind of preparation method of the green cushion packaging material with lignin enhancing PVA, and advantage exists In：Manufacturing process is simple, using papermaking by-product lignin, improves lignin utilization rate, manufacture is at low cost.Raw material is selected can be certainly The polyvinyl alcohol and biological material lignin so degraded, the lignin enhancing PVA expanded materials being prepared can be in natural item It degrades under part, meets environmentally protective growth requirement, be expected to substitute the non-degradable expanded material of tradition.Lignin and plasticising The addition of agent is improved expanded material mechanical property, heat resistance and the toughness of preparation.This expanded material good weatherability, has Cushion performance can be applied to buffering package field.
Specific embodiment
Lignin of the present invention, which is further described, by following embodiment enhances the preparation method of PVA expanded materials.
It in one embodiment proposed by the present invention, weighs 10gPVA and is placed in beaker, add in 100ml deionized waters with 90 DEG C Temperature stirring 1.5h, after weigh 0.8gNa2CO3、0.8gNaHCO3Water 40ml is added to stir with 2g alkali lignins, be allowed to fully molten Solution, obtained alkali lignin mixed solution is poured into PVA solution, and 2mL methyl-silicone oils and 8ml formaldehyde are added dropwise after mixing Solution stirs 2h with 80 DEG C of temperature water bath, is allowed to fully react, and after reaction, adds in 12ml dilution heat of sulfuric acid（4mol· L-1）And stir and be allowed to foam, foaming body is poured into mold, is allowed to be uniformly filled in entire mold and is placed in keeping 120 in baking oven DEG C cross-linking reaction 2h, after crosslinking, washes the sample being prepared, removes unreacted formaldehyde and sulfuric acid, in air from Right dry solidification obtains alkali lignin/polyvinyl alcohol foam material.The tensile strength of the expanded material is 0.71MPa at this time.
In another embodiment proposed by the present invention, 10gPVA (1788) is weighed, 120ml deionized waters are added in, in water 1.5h is stirred at a temperature of 90 DEG C in bath, is allowed to fully dissolve；Then 0.8gNa is weighed2CO3、0.8gNaHCO3With 3g alkali wood Quality adds water stirring to be allowed to fully dissolve；Bath temperature is down to 80 DEG C again, alkali lignin solution is poured into PVA solution, is mixed 2mL methyl-silicone oils and 8ml formalins, stirring in water bath 2h is added dropwise after closing uniformly, is allowed to fully react；After the completion of reaction, add Enter 10ml dilution heat of sulfuric acid（4mol·L-1）And it stirs and is allowed to foam.Foaming body is poured into glass culture dish, is placed in 120 DEG C Cross-linking reaction 2h in baking oven.Unreacted formaldehyde and sulfuric acid are finally washed out, it is wooden to obtain alkali for natural drying curing in air Element/polyvinyl alcohol foam material.The tensile strength of the expanded material is 0.60MPa at this time.
The foregoing is merely a prefered embodiment of the invention, but the range that the present invention is implemented is not intended to be limited thereto.

Claims (1)

1. a kind of preparation method of lignin enhancing PVA expanded materials, it is characterised in that follow the steps below：
（1）By PVA masterbatch（The degree of polymerization can be 500-2500, and alcoholysis degree can be 74%-99%）It is dissolved in deionized water, makes Deionized water is 6/1 ~ 14/1 with PVA mass ratioes, and above-mentioned solution temperature is controlled in 90 DEG C of insulated and stirred 1.5h, makes PVA abundant Dissolving；
（2）A certain amount of alkali lignin is weighed, it is made with PVA mass ratioes to be 1/5 ~ 2/5, deionized water is added in and stirs and be allowed to fill Divide dissolving, control deionized water is 4/1 with PVA mass ratioes；
（3）By a certain amount of Na2CO3And NaHCO3It adds in solution made from second step, makes Na2CO3And NaHCO3With PVA mass Than being all 2/25；
（4）By third walk made from mixed solution pour into PVA solution made from the first step, after mixing add in methyl silicon Oil, it is 1/50 to make the mass ratio of methyl-silicone oil and PVA, and it (can be ethylene glycol, polyethylene glycol, glycerine, season penta to add in plasticizer One kind or more in the nano materials such as tetrol, caprolactam, propylene glycol, trimethylolpropane, pentanediol, sorbierite and montmorillonite Kind), it is 1/5-4/5 to make its mass ratio with PVA；Formalin is added, it is 3/25 ~ 47/ to control its mass ratio with PVA 100；
（5）Solution temperature made from 4th step is controlled in 80 DEG C of insulated and stirred 2h, is allowed to fully react；
（6）After reaction, 4molL is added in-1Sulfuric acid solution, it is 31/100 ~ 63/100 to control its mass ratio with PVA, and Stirring is allowed to foam, and foaming body is poured into mold, is placed in 120 DEG C of cross-linking reaction 2h of holding in baking oven；
（7）After the completion of aforesaid operations, sample that water-washing step 6 is prepared removes unreacted formaldehyde and sulfuric acid, in air It spontaneously dries curing and obtains alkali lignin/polyvinyl alcohol foam material.
CN201611170026.6A 2016-12-16 2016-12-16 A kind of preparation method of lignin enhancing PVA expanded materials Pending CN108203518A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112679785A (en) * 2019-10-18 2021-04-20 韩佳彬 Method for preparing environment-friendly lignin-based resin buffer packaging material from papermaking industrial waste
CN114806205A (en) * 2022-06-07 2022-07-29 西南交通大学 Wood fiber-based film and preparation method and application thereof
CN115584140A (en) * 2022-11-08 2023-01-10 北京林业大学 Shear thickening fluid reinforced paper pulp foam material and preparation method thereof

Citations (2)

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Publication number Priority date Publication date Assignee Title
CN102336994A (en) * 2011-06-30 2012-02-01 中国神华能源股份有限公司 Polyvinyl alcohol foam oxygen insulation material and preparation method and application thereof
CN103073840A (en) * 2013-01-29 2013-05-01 山东圣泉化工股份有限公司 Phenolic aldehyde foam material

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN102336994A (en) * 2011-06-30 2012-02-01 中国神华能源股份有限公司 Polyvinyl alcohol foam oxygen insulation material and preparation method and application thereof
CN103073840A (en) * 2013-01-29 2013-05-01 山东圣泉化工股份有限公司 Phenolic aldehyde foam material

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112679785A (en) * 2019-10-18 2021-04-20 韩佳彬 Method for preparing environment-friendly lignin-based resin buffer packaging material from papermaking industrial waste
CN114806205A (en) * 2022-06-07 2022-07-29 西南交通大学 Wood fiber-based film and preparation method and application thereof
CN115584140A (en) * 2022-11-08 2023-01-10 北京林业大学 Shear thickening fluid reinforced paper pulp foam material and preparation method thereof
CN115584140B (en) * 2022-11-08 2023-10-03 北京林业大学 Shear thickening liquid reinforced paper pulp foaming material and preparation method thereof

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