CN110003532A - A kind of preparation method of vegetable fiber foaming and buffering material - Google Patents
A kind of preparation method of vegetable fiber foaming and buffering material Download PDFInfo
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- CN110003532A CN110003532A CN201910154043.8A CN201910154043A CN110003532A CN 110003532 A CN110003532 A CN 110003532A CN 201910154043 A CN201910154043 A CN 201910154043A CN 110003532 A CN110003532 A CN 110003532A
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- 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
- C08J9/10—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 nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
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- C08J2429/00—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
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Abstract
The present invention relates to a kind of preparation methods of vegetable fiber foaming and buffering material, belong to field of packaging material.The present invention prepares vegetable fiber foaming and buffering material by addition polyvinyl alcohol, and polyvinyl alcohol is a kind of white plates, powdered tasteless solid, and chemical structure, degree of hydrolysis and the degree of polymerization of polyvinyl alcohol influence its physical property.Intensity and solvent resistance after polymerization increase with the increase of the degree of polymerization and water viscosity, polyvinyl alcohol has glue film intensity high, water-fast and heat-resist, it is airtight to majority of gas, there is the characteristics of preferable adhesive force to fiber and filler, polyvinyl alcohol not only has filming function, when using as an aqueous solution, also there is collaboration cementation to polar material system, macromolecular skeleton can be provided in the material, it can make starch granules in polyvinyl alcohol molecule chain, it combines closely with the sponge of bonding, improves the mechanical strength and durability of material.
Description
Technical field
The present invention relates to a kind of preparation methods of vegetable fiber foaming and buffering material, belong to field of packaging material.
Background technique
With being constantly progressive for current science and technology, plastic products and its relevant industry have obtained swift and violent development.Its
In in buffering package field, polyethylene (PE) and polystyrene (EPS) class foamed damping material are light with its, heat-insulated, excellent
Cushion performance, it is at low cost and easy to process the advantages that, be widely applied in the field of transportation and packing.However, EPS class is moulded
Material foaming product is a kind of high-molecular compound, and there are problems during manufacture and use, waste is not easy to drop
Solution burns and more generates noxious material, brings and seriously affect to environment.Therefore, substitute products are developed into certainty.Stalk is fine
Tie up foamed damping material, because its raw material sources is extensive, excellent cushion performance, it is pollution-free the advantages that, be undoubtedly considered ideal
Plastic-substitute, become current research hotspot.
The amortizing packaging material of household electrical appliance and precision instrument etc. is usually using plastic foamed product.However foamed plastic exists
It is not easy to be degraded and pollute the environment after use, it has also become the serious public hazards of aggravation world environments crisis.The world is each at present
Great attention of the state to environmental problem, more and more countries, which have made laws, forbids being made with foamed plastic the commodity that buffer pad is packed
Import.Exploitation novel degradable and green cushion packaging material can comprehensively utilizing, meeting environmental requirement are very important.
Plant fiber material is a cheap renewable resource, can Reusability, and can be degraded after use without generating pollution problem,
And it can be with recycling." green package " will be able to achieve by preparing padded coaming using plant fiber material.
Have certain progress, laboratory in terms of the preparation research for carrying out expansion type Plantfiber buffering package material at present
The sample of preparation has preferable cushion performance, illustrates that the product has certain market potential.However, the technology is away from industrialization
Large-scale production still has a certain distance.To find out its cause, first is that paper fiber foamed damping material preparation technology is still immature at present, material
The raw material form of material is similar with paper cushion material and foam process is close with plastic material, therefore forming process is more complex；Second is that
Due to extensive, the different raw material of the raw material sources of vegetable fiber foaming and buffering material, manufactured padded coaming cushion performance is not
One, it is more difficult to realize industrialized development；Third is that the padded coaming being prepared into, there is many in terms of moisture resistance and water imbibition
Problem also results in larger impact to its industrial applications.
The molecular structure feature of fiber determines that it has the characteristics that " low elasticity ", compared with the macromolecule chain sections such as polyethylene with
Based on carbon-hydrogen link, have the characteristics that molten state is extremely slided so as to cause the macroscopic view such as easy foaming, easily molded, hydrophobic, fiber molecule
Design feature determines that its intermolecular be difficult to slide mutually, tie between intermolecular more difficult by chemical bonds, hygroscopic, fiber
Conjunction needs the features such as adhesive.Therefore, when preparing foamed material as primary raw material using paper fiber, following problems need to be focused on solving:
Due to the presence of hydroxyl in paper fiber molecule, so that paper fiber has extremely strong hydrophily, therefore, during the preparation process,
The more difficult discharge of hydrone for providing certain viscosity for system；After samples dried, in use, easily because dampness makes
It is unstable to obtain cushion performance.Recycling not only can be recycled due to the plant fiber that has drawn from paper structure type padded coaming, but also
It is degradable after discarded, it is considered to be ideal environment-friendly materials.But in terms of cushion performance angle, this material is compared with polystyrene
Equal plastic foam materials, cushion performance are to be improved.Delay currently, domestic and international researcher is committed to research and development expansion type plant fiber
Rush material, the existing paper wrapper of the material it is reusable and degradation the advantages of, and have similar foamed plastic it is excellent delay
Punching performance.However, the degradation rate of existing expansion type Plant Fiber-based Cushion Packaging Materials is lower (being lower than 70%), and need to bury longer
Time can be only achieved the effect of degradation.
Summary of the invention
The technical problems to be solved by the invention: for existing expansion type Plant Fiber-based Cushion Packaging Materials easily because dampness makes
The unstable problem of cushion performance is obtained, a kind of preparation method of vegetable fiber foaming and buffering material is provided.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) waste paper is placed in deionized water impregnate 20 ~ be placed in beater be beaten for 24 hours, obtain slurry；
(2) bluish dogbane nano-cellulose is added in slurry and 30 ~ 45min is stirred with 200 ~ 250r/min revolving speed, fibre must be mixed
Tie up slurry；
(3) composite fibre slurry is added in sodium hydroxide solution under 60 ~ 65 DEG C of water-baths with the stirring of 300 ~ 350r/min revolving speed
25 ~ 30min obtains alkaline composite fibre slurry；
(4) alkaline composite fibre slurry is cleaned 5 ~ 8 times with deionized water, then is wrung out with gauze, obtain composite fibre；
(5) starch is placed in deionized water by 1:20 in mass ratio, with the stirring of 300 ~ 350r/min revolving speed in 65 ~ 70 DEG C of water-baths
15 ~ 20min, room temperature cooling obtain starch solution；
(6) polyvinyl alcohol, azodicarbonamide, calcium carbonate, glycerine, borax are added in starch solution under room temperature with 250 ~
300r/min revolving speed stirs 15 ~ 20min, obtains mixed solution；
(7) composite fibre is added in mixed solution, 1.5 ~ 2h is stirred with 350 ~ 400r/min revolving speed under room temperature, then pour into
In 600mm × 600mm × 400mm mold, foaming body is obtained；
(8) foaming body is placed in micro-wave oven, with 10 ~ 15min of middle high fire heating, then is placed at 65 ~ 70 DEG C dry 10 ~ 12h, obtains
Vegetable fiber foaming and buffering material.
The bluish dogbane nano-cellulose, waste paper, polyvinyl alcohol, starch, azodicarbonamide, calcium carbonate, glycerine,
The parts by weight of borax be again according to parts by weight, weigh respectively 30 ~ 40 parts of bluish dogbane nano-celluloses, 60 ~ 80 parts of waste paper, 10 ~
20 parts of polyvinyl alcohol, 0.5 ~ 1 part of starch, 1 ~ 2 part of azodicarbonamide, 1 ~ 2 part of calcium carbonate, 2 ~ 5 parts of glycerine, 0.1 ~ 0.5 part
Borax.
Waste paper described in step (1) and the mass ratio of deionized water are 1:8.
The mass fraction of sodium hydroxide solution described in step (3) is 7.5%, composite fibre slurry and sodium hydroxide solution
Mass ratio be 1:10.
Starch described in step (5) and the mass ratio of deionized water are 1:20.
The specific preparation step of bluish dogbane nano-cellulose described in step (2) are as follows:
(1) dehydrated alcohol is added in toluene, 5 ~ 10min is stirred with 100 ~ 150r/min revolving speed under room temperature, it is molten to obtain toluene ethyl alcohol
Liquid；
(2) by the short fine addition toluene ethanol solution of bluish dogbane, 3 ~ 5 times are washed simultaneously with dehydrated alcohol after being extracted with Soxhlet extractor
Room temperature dries in the shade, and obtains pretreated bluish dogbane；
(3) pretreated bluish dogbane and sodium chlorite are added in deionized water, under room temperature with 100 ~ 150r/min revolving speed stirring 5 ~
10min, and it is 4 ~ 5 that glacial acetic acid control pH, which is added dropwise, obtains mixed solution；
(4) mixed solution being placed in 85 ~ 90 DEG C of water-baths heating 2 ~ 2.5h of reaction, filtering takes filter cake, it is washed with deionized 3 ~
5 times and room temperature dry in the shade, and obtain palm fibre；
(5) palm fibre element is placed in sodium hydroxide solution, with 150 ~ 200r/min revolving speed stir process under 80 ~ 85 DEG C of water-baths
2 ~ 2.5h, filtering, takes filter cake, is washed with deionized 3 ~ 5 times and room temperature dries in the shade, obtain purifying cellulose；
(6) purifying cellulose is placed in sulfuric acid, 1.5 ~ 2h of heating stirring in 45 ~ 50 DEG C of magnetic heating stirrer is obtained fine
Tie up plain acid solution；
(7) cellulosic acid solution being taken into lower layer's solid with the centrifuge separation of 5000 ~ 5500r/min revolving speed, deionization is washed 3 ~ 5 times,
Room temperature dries in the shade, and obtains bluish dogbane nano-cellulose.
The short fibre of the bluish dogbane, toluene, dehydrated alcohol, sodium chlorite parts by weight be 40 ~ 50 portions of bluish dogbanes it is short it is fine, 40
~ 50 parts of toluene, 20 ~ 25 parts of dehydrated alcohols, 15 ~ 20 parts of sodium chlorites.
The specific preparation step of the short fibre of bluish dogbane described in step (2) is
Bluish dogbane is first used washes of absolute alcohol 1 ~ 3 time, then cleaned 3 ~ 5 times with deionized water, it is placed in 40 ~ 50 DEG C dry 30 ~
45min, and the short fibre that length is 5 ~ 10mm is cut into, obtain the short fibre of bluish dogbane.
The mass concentration of sodium hydroxide solution described in step (5) be 15%, palm fibre element and sodium hydroxide solution matter
Amount is than being 1:10.
The mass concentration of sulfuric acid described in step (6) is 60%, and the mass ratio of purifying cellulose and sulfuric acid is 1:10.
The present invention is compared with other methods, and advantageous effects are:
(1) present invention uses bluish dogbane nano-cellulose for raw material, prepares vegetable fiber foaming and buffering material, apocynum fibre is
It is a kind of it is closed at both ends, intermediate have the cellular object that cell, middle part are thick and both ends are thin, obvious irregular kidney is presented in section
Shape, the smaller fiber of lumen is longitudinal without torsion, and surface is there are many vertical line and with the presence of horizontal section, and apocynum fibre is in standard atmosphere condition
Under regain up to 10 ~ 14%, there is stronger wettability power, moisture absorption dissipates wet very fast slowly, and gas permeability is preferable, bluish dogbane nanometer
Cellulose have the characteristics that it is renewable, biodegradable and free of contamination, due to bluish dogbane nano-cellulose have high draw ratio and
High specific surface area itself has fine structure and good mechanical property, and the crystallinity of bluish dogbane is high, and fiber alignment is regular,
Molecular binding resultant force is strong, and fibrous fracture intensity is high, can significantly improve the mechanical strength of vegetable fiber foaming and buffering material, and
There is largely free hydroxyl in nano-cellulose surface, hydroxyl polarity is stronger, and nanostructure has big specific surface area, this leads
Cause nano-cellulose that there is strong adsorptivity, between the bluish dogbane nano-cellulose intramolecular and molecule and molecule isolated there are still
A large amount of hydrogen bond, the water imbibition of vegetable fiber foaming and buffering material can be effectively improved, and the presence of hydrogen bond makes Nanowire
It ties up plain surface tension to increase, so the addition of nano-cellulose can effectively improve vegetable fiber foaming and buffering material under wet environment
Cushion performance；
(2) present invention prepares vegetable fiber foaming and buffering material, polyvinyl alcohol is a kind of white tablets by addition polyvinyl alcohol
Shape, powdered tasteless solid, chemical structure, degree of hydrolysis and the degree of polymerization of polyvinyl alcohol influence its physical property.
Intensity and solvent resistance after polymerization increase with the increase of the degree of polymerization and water viscosity, and polyvinyl alcohol has glue film intensity high, resistance to
Water and heat-resist, it is airtight to majority of gas, there is the characteristics of preferable adhesive force to fiber and filler, polyvinyl alcohol is not only
With filming function, as an aqueous solution in use, also having collaboration cementation to polar material system, can mention in the material
For macromolecular skeleton, it can make starch granules in polyvinyl alcohol molecule chain, combine closely, mention with the sponge of bonding
The mechanical strength and durability of high material；
(3) present invention selects plasticizer of the glycerine as foamed damping material, and plasticizer can effectively reduce the work between molecule
Firmly, the mobility for enhancing molecule causes the plasticity of material and flexibility to reinforce, and is easily worked it, due to foamed damping
Material generally enbrittles, hardness is big, and to make vegetable fiber foaming and buffering package material have good cushion performance, addition increases
Modeling agent can increase the flexibility and elasticity of material, and glycerine is colorless viscous shape liquid, colourless, odorless, asepsis environment-protecting, can be with
Water dissolves each other, can be more compared to the sorbierite etc. of macromolecule insoluble in organic solvents, the glycerine of small-molecular-weight such as benzene, chloroforms
It effectively penetrates among starch polymer chain fastly, through the hydroxyl in alcohol molecular structure in conjunction with the hydrogen in starch molecule,
Its hydrogen bond is destroyed, to make the elasticity and flexibility enhancing of material, in addition, the good fluidity of glycerine, can be uniformly dispersed in object
It in Material system, easily penetrates among starch polymer, destroys hydrogen bond therein, moreover it is possible to keep paper more soft, to make whole
The cushion performance of a material enhances；
(4) of the invention this uses borax as crosslinking agent, prepares vegetable fiber foaming and buffering material, crosslinking agent is that one kind plays company
The chemical substance of effect is connect, the molecule cross-link of many line styles can be made to reticulate structure, while promoting or adjusting intermolecularization
It learns key to generate, to improve product strength, borax is the white powder containing clear crystal, soluble easily in water and glycerine, in water
Hydrolysis occurs, generates boric acid, product can generate polyvinyl alcohol complex with the hydroxy combining above polyvinyl alcohol simultaneously,
Polyvinyl alcohol film forming is increased, while making to crosslink between starch and composite fibre and reacting to form three-dimensional space network knot
Structure, to effectively improve the moisture resistivity of vegetable fiber foaming and buffering material, mechanical property and buffer capacity.
Specific embodiment
Bluish dogbane is first used washes of absolute alcohol 1 ~ 3 time, then cleaned 3 ~ 5 times with deionized water, is placed in 40 ~ 50 DEG C dry
30 ~ 45min, and the short fibre that length is 5 ~ 10mm is cut into, the short fibre of bluish dogbane is obtained, according to parts by weight, weighs 40 ~ 50 parts respectively
Dehydrated alcohol is added in toluene for the short fibre of bluish dogbane, 40 ~ 50 parts of toluene, 20 ~ 25 parts of dehydrated alcohols, 15 ~ 20 parts of sodium chlorites,
5 ~ 10min is stirred with 100 ~ 150r/min revolving speed under room temperature, obtains toluene ethanol solution, the short fine addition toluene ethyl alcohol of bluish dogbane is molten
In liquid, 3 ~ 5 times are washed with dehydrated alcohol after being extracted with Soxhlet extractor and room temperature dries in the shade, obtains pretreated bluish dogbane, will be located in advance
The bluish dogbane of reason and sodium chlorite are added in deionized water, stir 5 ~ 10min under room temperature with 100 ~ 150r/min revolving speed, and be added dropwise
It is 4 ~ 5 that glacial acetic acid, which controls pH, obtains mixed solution, and mixed solution is placed in 2 ~ 2.5h of heating reaction in 85 ~ 90 DEG C of water-baths, is filtered,
Filter cake is taken, 3 ~ 5 times is washed with deionized and room temperature dries in the shade, obtains palm fibre element, palm fibre element is placed in matter by 1:10 in mass ratio
In the sodium hydroxide solution for measuring concentration 15%, with 150 ~ 200r/min revolving speed 2 ~ 2.5h of stir process, mistake under 80 ~ 85 DEG C of water-baths
Filter, takes filter cake, is washed with deionized 3 ~ 5 times and room temperature dries in the shade, and obtains purifying cellulose, and 1:10 in mass ratio is by purifying cellulose
It is placed in the sulfuric acid that mass concentration is 60%, 1.5 ~ 2h of heating stirring, obtains cellulose in 45 ~ 50 DEG C of magnetic heating stirrer
Acid solution takes lower layer's solid by cellulosic acid solution with the centrifuge separation of 5000 ~ 5500r/min revolving speed, and deionization is washed 3 ~ 5 times,
Room temperature dries in the shade, and obtains bluish dogbane nano-cellulose, then according to parts by weight, weighs 30 ~ 40 parts of bluish dogbane nano-celluloses, 60 respectively
~ 80 parts of waste paper, 10 ~ 20 parts of polyvinyl alcohol, 0.5 ~ 1 part of starch, 1 ~ 2 part of azodicarbonamide, 1 ~ 2 part of calcium carbonate, 2 ~ 5 parts the third three
Alcohol, 0.1 ~ 0.5 part of borax, 1:8 in mass ratio waste paper is placed in deionized water impregnate 20 ~ be placed in beater be beaten for 24 hours,
Slurry is obtained, bluish dogbane nano-cellulose is added in slurry and stirs 30 ~ 45min with 200 ~ 250r/min revolving speed, fibre must be mixed
Slurry is tieed up, 1:10 in mass ratio composite fibre slurry is added in the sodium hydroxide solution that mass fraction is 7.5% at 60 ~ 65 DEG C
25 ~ 30min is stirred with 300 ~ 350r/min revolving speed under water-bath, obtains alkaline composite fibre slurry, alkaline composite fibre slurry is used
Deionized water is cleaned 5 ~ 8 times, then is wrung out with gauze, and composite fibre is obtained, and starch is placed in deionized water by 1:20 in mass ratio,
15 ~ 20min is stirred with 300 ~ 350r/min revolving speed in 65 ~ 70 DEG C of water-baths, room temperature cooling obtains starch solution, by polyvinyl alcohol, idol
Nitrogen diformamide, calcium carbonate, glycerine, borax be added in starch solution under room temperature with 250 ~ 300r/min revolving speed stirring 15 ~
20min obtains mixed solution, and composite fibre is added in mixed solution, stirs 1.5 ~ 2h under room temperature with 350 ~ 400r/min revolving speed,
It is poured into 600mm × 600mm × 400mm mold again, obtains foaming body, foaming body is placed in micro-wave oven, with middle high fire heating
10 ~ 15min, then dry 10 ~ 12h is placed at 65 ~ 70 DEG C, obtain vegetable fiber foaming and buffering material.
Bluish dogbane is first used washes of absolute alcohol 1 time, then cleaned 3 times with deionized water, is placed in 40 DEG C dry 30min,
And the short fibre that length is 5mm is cut into, the short fibre of bluish dogbane is obtained, according to parts by weight, weighs the short fibre of 40 portions of bluish dogbanes, 40 parts respectively
Dehydrated alcohol is added in toluene for toluene, 20 parts of dehydrated alcohols, 15 parts of sodium chlorites, with the stirring of 100r/min revolving speed under room temperature
5min obtains toluene ethanol solution, the short fibre of bluish dogbane is added in toluene ethanol solution, with anhydrous second after being extracted with Soxhlet extractor
Alcohol washs 3 times and room temperature dries in the shade, and obtains pretreated bluish dogbane, and deionized water is added in pretreated bluish dogbane and sodium chlorite
In, 5min is stirred with 100r/min revolving speed under room temperature, and it is 4 that glacial acetic acid control pH, which is added dropwise, obtains mixed solution, mixed solution is set
Heating reaction 2h, filtering take filter cake, are washed with deionized 3 times and room temperature dries in the shade in 85 DEG C of water-baths, obtain palm fibre element, press
Palm fibre element is placed in the sodium hydroxide solution of mass concentration 15% by mass ratio 1:10, is turned under 80 DEG C of water-baths with 150r/min
Fast stir process 2h, filtering, takes filter cake, is washed with deionized 3 times and room temperature dries in the shade, obtain purifying cellulose, in mass ratio 1:
10 are placed in purifying cellulose in the sulfuric acid that mass concentration is 60%, the heating stirring 1.5h in 45 DEG C of magnetic heating stirrer,
Cellulosic acid solution is obtained, by cellulosic acid solution with the centrifuge separation of 5000r/min revolving speed, takes lower layer's solid, deionization washing 3
Secondary, room temperature dries in the shade, and obtains bluish dogbane nano-cellulose, then according to parts by weight, weighs 30 parts of bluish dogbane nano-celluloses, 60 respectively
Part waste paper, 10 parts of polyvinyl alcohol, 0.5 part of starch, 1 part of azodicarbonamide, 1 part of calcium carbonate, 2 parts of glycerine, 0.1 part of borax,
Waste paper is placed in deionized water by 1:8 in mass ratio to be impregnated 20h and is placed in beater and is beaten, and slurry is obtained, by bluish dogbane nanometer
Cellulose is added in slurry and stirs 30min with 200r/min revolving speed, obtains composite fibre slurry, 1:10 in mass ratio will mix fibre
Slurry is tieed up to be added in the sodium hydroxide solution that mass fraction is 7.5% under 60 DEG C of water-baths with 300r/min revolving speed stirring 25min,
Alkaline composite fibre slurry is obtained, alkaline composite fibre slurry is cleaned 5 times, then wrung out with gauze with deionized water, fibre must be mixed
Dimension, starch is placed in deionized water by 1:20 in mass ratio, stirs 15min, room temperature in 65 DEG C of water-baths with 300r/min revolving speed
It is cooling, starch solution is obtained, room temperature in starch solution is added in polyvinyl alcohol, azodicarbonamide, calcium carbonate, glycerine, borax
Under with 250r/min revolving speed stir 15min, obtain mixed solution, by composite fibre be added mixed solution in, with 350r/ under room temperature
Min revolving speed stirs 1.5h, then pours into 600mm × 600mm × 400mm mold, obtains foaming body, foaming body is placed in micro-wave oven
In, with middle high fire heating 10min, then it is placed at 65 DEG C dry 10h, obtains vegetable fiber foaming and buffering material.
Bluish dogbane is first used washes of absolute alcohol 1 time, then cleaned 5 times with deionized water, is placed in 40 DEG C dry 45min,
And the short fibre that length is 5mm is cut into, the short fibre of bluish dogbane is obtained, according to parts by weight, weighs the short fibre of 50 portions of bluish dogbanes, 40 parts respectively
Dehydrated alcohol is added in toluene for toluene, 25 parts of dehydrated alcohols, 15 parts of sodium chlorites, with the stirring of 150r/min revolving speed under room temperature
5min obtains toluene ethanol solution, the short fibre of bluish dogbane is added in toluene ethanol solution, with anhydrous second after being extracted with Soxhlet extractor
Alcohol washs 3 times and room temperature dries in the shade, and obtains pretreated bluish dogbane, and deionized water is added in pretreated bluish dogbane and sodium chlorite
In, 5min is stirred with 150r/min revolving speed under room temperature, and it is 5 that glacial acetic acid control pH, which is added dropwise, obtains mixed solution, mixed solution is set
Heating reaction 2.5h, filtering take filter cake, are washed with deionized 3 times and room temperature dries in the shade in 85 DEG C of water-baths, obtain palm fibre element,
Palm fibre element is placed in the sodium hydroxide solution of mass concentration 15% by 1:10 in mass ratio, with 150 ~ 200r/ under 85 DEG C of water-baths
Min revolving speed stir process 2h, filtering, takes filter cake, is washed with deionized 5 times and room temperature dries in the shade, purifying cellulose is obtained, by quality
Purifying cellulose is placed in the sulfuric acid that mass concentration is 60% than 1:10, the heating stirring in 45 DEG C of magnetic heating stirrer
2h obtains cellulosic acid solution, by cellulosic acid solution with 5000 ~ 5500r/min revolving speed centrifuge separation, take lower layer's solid, go from
Son washing 3 times, room temperature dries in the shade, and obtains bluish dogbane nano-cellulose, then according to parts by weight, weighs 40 parts of bluish dogbane Nanowires respectively
Tie up element, 60 parts of waste paper, 20 parts of polyvinyl alcohol, 0.5 part of starch, 2 parts of azodicarbonamides, 2 parts of calcium carbonate, 2 parts of glycerine, 0.1
Waste paper is placed in deionized water to impregnate to be placed in beater for 24 hours and be beaten, obtains slurry, will spread out by part borax, in mass ratio 1:8
Numb nano-cellulose is added in slurry and stirs 45min with 200r/min revolving speed, obtains composite fibre slurry, and 1:10 in mass ratio will
Composite fibre slurry is added in the sodium hydroxide solution that mass fraction is 7.5% under 60 DEG C of water-baths with the stirring of 350r/min revolving speed
25min obtains alkaline composite fibre slurry, alkaline composite fibre slurry is cleaned 5 times, then wrung out with gauze with deionized water, is obtained
Starch is placed in deionized water by composite fibre, in mass ratio 1:20, with the stirring of 300r/min revolving speed in 70 DEG C of water-baths
20min, room temperature cooling obtain starch solution, and starch is added in polyvinyl alcohol, azodicarbonamide, calcium carbonate, glycerine, borax
15min is stirred with 300r/min revolving speed under room temperature in solution, obtains mixed solution, composite fibre is added in mixed solution, room temperature
Under 1.5h stirred with ~ 400r/min revolving speed, then pour into 600mm × 600mm × 400mm mold, foaming body obtained, by foaming body
It is placed in micro-wave oven, with middle high fire heating 15min, then is placed at 65 DEG C dry 12h, obtains vegetable fiber foaming and buffering material.
Bluish dogbane is first used washes of absolute alcohol 3 times, then cleaned 5 times with deionized water, is placed in 50 DEG C dry 45min,
And the short fibre that length is 10mm is cut into, the short fibre of bluish dogbane is obtained, according to parts by weight, weighs the short fibre of 50 portions of bluish dogbanes, 50 respectively
Part toluene, 25 parts of dehydrated alcohols, 20 parts of sodium chlorites, dehydrated alcohol is added in toluene, is stirred under room temperature with 150r/min revolving speed
10min is mixed, toluene ethanol solution is obtained, by the short fine addition toluene ethanol solution of bluish dogbane, uses nothing after being extracted with Soxhlet extractor
Water-ethanol washs 5 times and room temperature and dries in the shade, and obtains pretreated bluish dogbane, by pretreated bluish dogbane and sodium chlorite addition go from
In sub- water, 10min is stirred with 150r/min revolving speed under room temperature, and it is 5 that glacial acetic acid control pH, which is added dropwise, obtains mixed solution, will mix
Solution is placed in heating reaction 2.5h, filtering in 90 DEG C of water-baths and takes filter cake, be washed with deionized 5 times and room temperature dries in the shade, obtain brown fibre
Dimension element, palm fibre element is placed in the sodium hydroxide solution of mass concentration 15% by 1:10 in mass ratio, under 85 DEG C of water-baths with
200r/min revolving speed stir process 2.5h, filtering, takes filter cake, is washed with deionized 5 times and room temperature dries in the shade, obtain cleaning cellulose
Purifying cellulose is placed in the sulfuric acid that mass concentration is 60% by element, in mass ratio 1:10, in 50 DEG C of magnetic heating stirrer
Heating stirring 2h obtains cellulosic acid solution, by cellulosic acid solution with the centrifuge separation of 5500r/min revolving speed, takes lower layer's solid, goes
Ion is washed 5 times, and room temperature dries in the shade, and obtains bluish dogbane nano-cellulose, then according to parts by weight, weighs 40 parts of bluish dogbane nanometers respectively
Cellulose, 80 parts of waste paper, 20 parts of polyvinyl alcohol, 1 part of starch, 2 parts of azodicarbonamides, 2 parts of calcium carbonate, 5 parts of glycerine, 0.5
Waste paper is placed in deionized water to impregnate to be placed in beater for 24 hours and be beaten, obtains slurry, will spread out by part borax, in mass ratio 1:8
Numb nano-cellulose is added in slurry and stirs 45min with 250r/min revolving speed, obtains composite fibre slurry, and 1:10 in mass ratio will
Composite fibre slurry is added in the sodium hydroxide solution that mass fraction is 7.5% under 65 DEG C of water-baths with 300 ~ 350r/min revolving speed
30min is stirred, alkaline composite fibre slurry is obtained, alkaline composite fibre slurry is cleaned 8 times with deionized water, then is twisted with gauze
It is dry, composite fibre is obtained, starch is placed in deionized water by 1:20 in mass ratio, with the stirring of 350r/min revolving speed in 70 DEG C of water-baths
20min, room temperature cooling obtain starch solution, and starch is added in polyvinyl alcohol, azodicarbonamide, calcium carbonate, glycerine, borax
20min is stirred with 300r/min revolving speed under room temperature in solution, obtains mixed solution, composite fibre is added in mixed solution, room temperature
Under 2h stirred with 400r/min revolving speed, then pour into 600mm × 600mm × 400mm mold, obtain foaming body, foaming body is set
In micro-wave oven, with middle high fire heating 15min, then it is placed at 70 DEG C dry 12h, obtains vegetable fiber foaming and buffering material.
Vegetable fiber foaming and buffering material prepared by the present invention and commercially available common foamed material are detected, it is specific to examine
Survey result such as following table table 1:
Detection method:
(1) picking represents the sample of sample mean appearance level, and cuts 1cm × 1cm sample with cutter at random from its surface
It is scanned Electronic Speculum observation；
(2) in order to which farthest simulating natural environment, Degrading experiment are selected with soil-burial natural degradation method.Choose one piece of examination
Sample cuts into 3cm × 3cm fritter, then the soil box of certain depth is excavated on soil, landfill.It is taken out after two months, observes it
Degradation situation.
1 vegetable fiber foaming and buffering material property of table characterization
Vegetable fiber foaming and buffering material prepared by the present invention as shown in Table 1, outside macroscopic a large amount of holes, fibrous inside
There is many gaps, and overstrain is small, and elastic specific energy is low, and resilience performance is excellent, and degradable.With extremely wide city
Field application value.
Claims (10)
1. a kind of preparation method of vegetable fiber foaming and buffering material, which is characterized in that specific preparation step are as follows:
(1) waste paper is placed in deionized water impregnate 20 ~ be placed in beater be beaten for 24 hours, obtain slurry；
(2) bluish dogbane nano-cellulose is added in slurry and 30 ~ 45min is stirred with 200 ~ 250r/min revolving speed, fibre must be mixed
Tie up slurry；
(3) composite fibre slurry is added in sodium hydroxide solution under 60 ~ 65 DEG C of water-baths with the stirring of 300 ~ 350r/min revolving speed
25 ~ 30min obtains alkaline composite fibre slurry；
(4) alkaline composite fibre slurry is cleaned 5 ~ 8 times with deionized water, then is wrung out with gauze, obtain composite fibre；
(5) starch is placed in deionized water, 15 ~ 20min is stirred with 300 ~ 350r/min revolving speed in 65 ~ 70 DEG C of water-baths, often
Temperature is cooling, obtains starch solution；
(6) polyvinyl alcohol, azodicarbonamide, calcium carbonate, glycerine, borax are added in starch solution under room temperature with 250 ~
300r/min revolving speed stirs 15 ~ 20min, obtains mixed solution；
(7) composite fibre is added in mixed solution, 1.5 ~ 2h is stirred with 350 ~ 400r/min revolving speed under room temperature, then pour into
In 600mm × 600mm × 400mm mold, foaming body is obtained；
(8) foaming body is placed in micro-wave oven, with 10 ~ 15min of middle high fire heating, then is placed at 65 ~ 70 DEG C dry 10 ~ 12h, obtains
Vegetable fiber foaming and buffering material.
2. a kind of preparation method of vegetable fiber foaming and buffering material according to claim 1, which is characterized in that described
Bluish dogbane nano-cellulose, waste paper, polyvinyl alcohol, starch, azodicarbonamide, calcium carbonate, glycerine, borax parts by weight be
Again according to parts by weight, respectively weigh 30 ~ 40 parts of bluish dogbane nano-celluloses, 60 ~ 80 parts of waste paper, 10 ~ 20 parts of polyvinyl alcohol,
0.5 ~ 1 part of starch, 1 ~ 2 part of azodicarbonamide, 1 ~ 2 part of calcium carbonate, 2 ~ 5 parts of glycerine, 0.1 ~ 0.5 part of borax.
3. a kind of preparation method of vegetable fiber foaming and buffering material according to claim 1, which is characterized in that step
(1) mass ratio of waste paper and deionized water described in is 1:8.
4. a kind of preparation method of vegetable fiber foaming and buffering material according to claim 1, which is characterized in that step
(3) mass fraction of the sodium hydroxide solution described in is 7.5%, and the mass ratio of composite fibre slurry and sodium hydroxide solution is 1:
10。
5. a kind of preparation method of vegetable fiber foaming and buffering material according to claim 1, which is characterized in that step
(5) mass ratio of starch and deionized water described in is 1:20.
6. a kind of preparation method of vegetable fiber foaming and buffering material according to claim 1, which is characterized in that step
(2) the specific preparation step of the bluish dogbane nano-cellulose described in are as follows:
(1) dehydrated alcohol is added in toluene, 5 ~ 10min is stirred with 100 ~ 150r/min revolving speed under room temperature, it is molten to obtain toluene ethyl alcohol
Liquid；
(2) by the short fine addition toluene ethanol solution of bluish dogbane, 3 ~ 5 times are washed simultaneously with dehydrated alcohol after being extracted with Soxhlet extractor
Room temperature dries in the shade, and obtains pretreated bluish dogbane；
(3) pretreated bluish dogbane and sodium chlorite are added in deionized water, under room temperature with 100 ~ 150r/min revolving speed stirring 5 ~
10min, and it is 4 ~ 5 that glacial acetic acid control pH, which is added dropwise, obtains mixed solution；
(4) mixed solution being placed in 85 ~ 90 DEG C of water-baths heating 2 ~ 2.5h of reaction, filtering takes filter cake, it is washed with deionized 3 ~
5 times and room temperature dry in the shade, and obtain palm fibre；
(5) palm fibre element is placed in sodium hydroxide solution, with 150 ~ 200r/min revolving speed stir process under 80 ~ 85 DEG C of water-baths
2 ~ 2.5h, filtering, takes filter cake, is washed with deionized 3 ~ 5 times and room temperature dries in the shade, obtain purifying cellulose；
(6) purifying cellulose is placed in sulfuric acid, 1.5 ~ 2h of heating stirring in 45 ~ 50 DEG C of magnetic heating stirrer is obtained fine
Tie up plain acid solution；
(7) cellulosic acid solution being taken into lower layer's solid with the centrifuge separation of 5000 ~ 5500r/min revolving speed, deionization is washed 3 ~ 5 times,
Room temperature dries in the shade, and obtains bluish dogbane nano-cellulose.
7. a kind of preparation method of vegetable fiber foaming and buffering material according to claim 6, which is characterized in that described
The short fibre of bluish dogbane, toluene, dehydrated alcohol, sodium chlorite parts by weight be the short fibre of 40 ~ 50 portions of bluish dogbanes, 40 ~ 50 parts of toluene, 20 ~
25 parts of dehydrated alcohols, 15 ~ 20 parts of sodium chlorites.
8. a kind of preparation method of vegetable fiber foaming and buffering material according to claim 6, which is characterized in that step
(2) the specific preparation step of the short fibre of bluish dogbane described in is
Bluish dogbane is first used washes of absolute alcohol 1 ~ 3 time, then cleaned 3 ~ 5 times with deionized water, it is placed in 40 ~ 50 DEG C dry 30 ~
45min, and the short fibre that length is 5 ~ 10mm is cut into, obtain the short fibre of bluish dogbane.
9. a kind of preparation method of vegetable fiber foaming and buffering material according to claim 6, which is characterized in that step
(5) mass concentration of the sodium hydroxide solution described in be 15%, palm fibre element and sodium hydroxide solution mass ratio be 1:10.
10. a kind of preparation method of vegetable fiber foaming and buffering material according to claim 6, which is characterized in that step
(6) mass concentration of the sulfuric acid described in is 60%, and the mass ratio of purifying cellulose and sulfuric acid is 1:10.
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