CN110004594A - A kind of preparation method of Disposable, nonwoven medical protective material - Google Patents
A kind of preparation method of Disposable, nonwoven medical protective material Download PDFInfo
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- CN110004594A CN110004594A CN201910150419.8A CN201910150419A CN110004594A CN 110004594 A CN110004594 A CN 110004594A CN 201910150419 A CN201910150419 A CN 201910150419A CN 110004594 A CN110004594 A CN 110004594A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
- C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
- D01D5/0038—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion the fibre formed by solvent evaporation, i.e. dry electro-spinning
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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- Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials For Medical Uses (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The present invention relates to a kind of preparation methods of Disposable, nonwoven medical protective material, belong to textile material technical field.The present invention is with polyacrylamide, polyvinyl alcohol is raw material, and pass through addition carboxymethyl cellulose graft acrylamide polymer and casein, prepare the middle water absorbing layer of Disposable, nonwoven medical protective material, amide groups in polyacrylamide is non-ionic hydrophilic group, with good water imbibition, it is grafting skeleton with carboxymethyl cellulose element, it is copolymerized with acrylamide, it can be with the water-swellable type macromolecule resin in structure containing great amount of hydroxy group, the super moisture absorbing resin of carboxymethyl cellulose graft polymers preparation has excellent salt tolerance, resistance to acid and alkali and biocompatibility, casein has good water imbibition and biocompatibility, polypeptide therein can be together with the molecular entanglement of carboxymethyl cellulose graft polymers, improve the stability and water imbibition of material.
Description
Technical field
The present invention relates to a kind of preparation methods of Disposable, nonwoven medical protective material, belong to textile material technology neck
Domain.
Background technique
It is reported in the first surgical operation in the world within 1984, medical staff causes due to the contacting blood with HIV patient
Infection.Since then, medical staff with the patient contact with communicable disease due to being infected, it has also become one in medical field
Noticeable occupational problem.Worldwide, in clinical operation, for HIV (AIDS AIDS), HBV (Type B liver
It is scorching) concern of virus, the infectious disease of HCV (hepatitis C) and other life-threatenings, blood, bacterium and antivirus protection are weaved material
Material obtains the huge motive force of development.
With the development of science and technology, medical protective material increasingly becomes the topic of people's concern, the classification to protective performance
It is more and more in detail and comprehensive.There are many relevant standards to provide that more general standard is Europe at present protective performance in the world
EN standard, the U.S.'s NIOSH standard of alliance.China in 2003 promulgated " disposable medical protective garment technical requirements ", it is specified that
The various standards of medical protective material.It can be seen that China's modern medical service system is to the research of medical protective material to one
The stage paid much attention to.
Present medical procedure generally uses 4 kinds of Protection Products: surgical clothes, patient cover valance, surgical operation towel,
Equipment valance.The performance emphasis of these types of product is different, but requires and have certain protective performance according to statistics, and people is per minute
About fall off 10,000 granule foreigns, each impurity is likely to just keep germ；In the air of medical care operating room inevitably
There is particulate matters, and therefore, medical material must have protective.When clinic opens cranium, abdominal cavity or other major surgeries,
When the moment of Jian is beaten or when implementing certain operations in the cranium brain of patient, abdominal cavity, in the moment of artery cutting, the body of patient
Liquid, blood, urine often go out with higher pressure value, with unpredictable direction splash.In this case, doctor is cured mainly
The general protective garment of raw and Physician's Assistant dress is extremely difficult to so high tolerance liquid pressure value.Therefore, patient has
The fluids such as body fluid, blood, the urine of infectiousness germ can easily penetrate common protective garment, and seep protective materials, compare
The body of doctor is readily accessed, microorganism relatively hazardous at the same time is also brought into, and doctor and its nursing staff are infected with to disease
The pollutants probability such as the blood that the stream of people goes out are larger, and health of human body faces threat very serious.Therefore protective garment to have the capability of doing sth by
The infiltration of liquid under elevated pressures, the invasion for effectively shielding incident bacterium or virus develop and a kind of are suitable for such situation
Thus the idea of the medical protective material of lower clinic major surgery generates.
Superabsorbent fiber (SuperAbsorbentFiber, SAF) be one kind can absorb itself weigh tens times, it is several hundred
Times so thousands of times of liquid high polymer, liquid absorption amount is big, rate of liquid aspiration is fast, and liquid-keeping property is strong.Superabsorbent fiber is special
Process conditions under product " 2] function that higher absorption physiological saline, body fluid, blood can be kept, thus can be used for
In terms of absorbing blood body fluid.General medical protective material will form higher liquid-resistant performance, preferable virion and micro-
This comprehensive protective performance of biological shielding barrier property, will have several functional layers to play a role.Each functional layer is corresponding a kind of
Or functional layer is perfectly combined with each other by a variety of protection effects by special technique or later period finishing functions, passing through
It learns or physical action, the safeguard function of generation 1+1 > 2 meets the requirement of different occasion difference protective performances.
Clinical medical protective materials is made of trilaminate material, use demand when can satisfy for above situation burst:
Outer layer: using the material with higher tolerance liquid pressure value.Under higher liquid pressure conditions, liquid can be prevented
Infiltration, threatens to body to reduce the virus infiltration carried in liquid.
Middle layer: using the superabsorbent fiber non-woven cloth for possessing good imbibition ability, the minute quantity body that outer layer is permeated
Liquid, blood absorption are fallen, and infection is reduced.This is in order to avoid being destroyed in cladding material or being more than outer layer in liquid pressure value
Material tolerance pressure force value to greatest extent when, apply more one layers of protection.
Inner layer: primarily serving first two layers of the effect of consolidating, bear middle layer due to continual absorption body fluid, blood and
Make entire protective materials deformation, dimension contracting, so that material is integrally maintained certain strength, and play second of filtering blood, body fluid, disease
The effect of bacterium.By three layers of protection, Infection probability is reduced to 0%.During clinical operation, who is intended to avoid meaningless
Infection, to it is unpredictable infection play 100% prevention.Therefore, studying one kind has higher tolerance fluid pressure, and has super
The protective materials of high-selenium corn liquid functional, so that making it have excellent barrier absorbs protective performance, to reduction clinical medical and nursing sense
Dye, promotes the development of protective materials to have positive meaning at the progress for pushing modern medical service hygiene industry.
The effect of medical protective material is to generate bacterium blocking to prevent bacterium migration, reduces cross-infection.Protective clothes
Woven/knitting, non-woven cloth, world authority advisory organization DavidRigby can be divided by fabric institutional framework
Associates (DRA) market investigating datas shows 1995-2008 woven fabric, knitted fabric and woven cloths all over the world
Protective garment consumption annual growth increases sharply.It is divided into arrangement processing, coating and overlay film three categories method by processing complex technique.
It is divided into disposable type (disposable), restricted type and reusable type by service life.Wherein, non-woven protective material is because it is light
Just, cheap, be avoided that cross-infection and many merits such as environmental pollution is small to be increasingly used in Dispoable medical anti-
On protective material.
Developed country is more early to the research of medical protection articles, and the technology content and added value of product are all very high, especially exist
Body fluid, bacterium and antivirus protection textile material field obtain huge development.There is resistance to liquid and screen liquid properties to produce at present
The product for mainly having following three companies of product: the Suprel of E.I.Du Pont Company is soft by the isolating and protecting characteristic of polyester and polypropylene
Soft comfortable synthesis has excellent isolation features；Biowear can be protected and be carried in blood by addition antibacterial ion
Pathogen is being widely used in the diagnosis and treatment items with infection risk such as dialysis, ambulatory surgery operation.Ahlstrom company
BreathableViralBarrier (BVB) is laminated by unique trilaminate material, be able to suppress pathogenic germ (such as influenza disease
Poison) propagation, for protective garment, surgical operation coat etc..The hydrostatic pressing of the MediSoftUltra waterproof performance of PGI company
Reach 75cm, is just used in medical operating clothes and other special dimensions.
All things considered, superabsorbent fiber non-woven cloth the research of medical aspect is more concentrate on medical dressing in terms of,
And the application on protective materials rarely has and is related to；Although protective materials research is more, it is specific to the resistance to liquid of clinical major surgery
The design of aspect of performance is seldom；The material price that foreign countries can be applied to clinic is high, limits the large-scale use of material；State
Interior existing Disposable, nonwoven protective materials is difficult to have both high resistance to fluidity energy and comfortable ventilating performance, practical application effect pole
Difference.
Therefore, a kind of cheap high pressure resistant, superabsorbent liquid protective materials that can be used for clinical major surgery is studied, and
Good comfort and liquid barrier are had both, providing the new selection of one kind with protective materials for clinic is particularly important.
Summary of the invention
The technical problems to be solved by the invention: it is difficult to have both pole for domestic existing Disposable, nonwoven protective materials
High resistance to fluidity it is medical anti-to provide a kind of Disposable, nonwoven with comfortable ventilating performance, the very poor problem of practical application effect
The preparation method of protective material.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) taking a block specifications is the original bamboo fabric of 100mm × 100mm, by polyacrylamide composite polyvinyl alcohol water absorption layer
It is placed on bamboo fiber, then polyvinylidene fluoride film is placed on polyacrylamide composite polyvinyl alcohol water absorption layer, and pressed from both sides at two
Layer is intermediate to place one layer of EVA hot-melt adhesive respectively, obtains mixing layer material；
(2) 1 ~ 2h of heating and thermal insulation under conditions of mixing layer material being placed in 120 ~ 140 DEG C, room temperature cooling obtain Disposable, nonwoven
Medical protective material.
EVA hot-melt adhesive layer described in step (1) with a thickness of 0.6 ~ 0.8mm.
The specific preparation step of polyvinylidene fluoride film described in step (1) are as follows:
(1) acetone is added N, in N- dimethyl formyl, 12 ~ 16min is stirred with 200 ~ 240r/min revolving speed under room temperature, obtains N, N-
Dimethylformamide acetone soln；
(2) Kynoar is added in n,N-Dimethylformamide acetone soln, is stirred under room temperature with 240 ~ 300r/min revolving speed
30 ~ 40min is mixed, Kynoar spinning solution is obtained；
(3) Kynoar spinning solution is placed in the syringe that spinneret internal diameter is 0.5mm, is connect by anode, aluminium foil of copper wire
Kynoar spinning solution is sprayed on aluminium foil and carries out spinning by the earth pertaining to YIN pole, cuts, and obtaining specification is the poly- inclined of 100mm × 100mm
Fluoride film.
The Kynoar, n,N-Dimethylformamide, acetone parts by weight be 40 ~ 50 parts of Kynoar, 120 ~
150 parts of n,N-Dimethylformamide, 80 ~ 100 parts of acetone.
The distance between spinneret and aluminium foil described in step (3) are 16 ~ 20cm, and the condition of electrostatic spinning is relative humidity
40%~50%, 28 ~ 30 DEG C of temperature, voltage are 12 ~ 14kV, and the flow velocity of Kynoar spinning solution is 0.2 ~ 0.4mL/h.
The specific preparation step of polyacrylamide composite polyvinyl alcohol water absorption layer described in step (1):
(1) polyvinyl alcohol is added in n,N-Dimethylformamide, 10 ~ 20min is stirred with 200 ~ 240r/min revolving speed under room temperature,
Obtain poly-vinyl alcohol solution；
(2) polyacrylamide, carboxymethyl cellulose graft polymers are added in poly-vinyl alcohol solution, are placed in magnetic stirrer
In, 4 ~ 8h is stirred with 300 ~ 320r/min revolving speed under conditions of 30 ~ 40 DEG C, heat preservation obtains mixed solution；
(3) casein is added in mixed solution, 1 ~ 2h is stirred with 220 ~ 240r/min revolving speed under conditions of 30 ~ 40 DEG C, is obtained
Spinning solution；
(4) spinning solution is placed in the syringe that spinneret internal diameter is 1mm, is anode, aluminium foil ground connection for cathode using copper wire, spinneret
The distance between mouth and aluminium foil are 16 ~ 20cm, in relative humidity 40%~50%, 22 ~ 28 DEG C of temperature, the item that voltage is 14 ~ 18kV
Under part, spinning solution is sprayed on aluminium foil with the flow velocity of 1.6 ~ 2.0mL/h and carries out spinning, cut, obtaining specification is 100mm × 100mm
Polyacrylamide composite polyvinyl alcohol water absorption layer.
The polyacrylamide, polyvinyl alcohol, carboxymethyl cellulose graft polymers, casein, N, N- dimethyl methyl
The parts by weight of amide are 40 ~ 60 parts of polyacrylamides, 20 ~ 30 parts of polyvinyl alcohol, 20 ~ 30 parts of carboxymethyl celluloses graft polymerizations
Object, 6 ~ 8 parts of casein, 160 ~ 240 parts of n,N-Dimethylformamide.
The distance between spinneret and aluminium foil described in step (4) be 16 ~ 20cm, spinning condition be relative humidity 40%~
50%, 22 ~ 28 DEG C of temperature, voltage are 14 ~ 18kV, and the flow velocity of spinning solution is 1.6 ~ 2.0mL/h.
Carboxymethyl cellulose graft polymers described in step (2) specific the preparation method comprises the following steps:
(1) carboxymethyl cellulose is added in ionized water, with the stirring of 200 ~ 240r/min revolving speed under 40 ~ 50 DEG C of water bath condition
30 ~ 40min, heat preservation, obtains cmc soln；
(2) by azodiisobutyronitrile just, sulfuric acid, potassium permanganate be added cmc soln in, with the gas of 30 ~ 40mL/min
Flow velocity degree is passed through nitrogen protection, stirs 10 ~ 15min under 40 ~ 50 DEG C of water bath condition with 240 ~ 280r/min revolving speed, must cause
System；
(3) acrylamide is added in initiation system, under the nitrogen atmosphere of 30 ~ 40mL/min, 40 ~ 50 DEG C of water bath condition,
It is stirred to react 3 ~ 5h with 300 ~ 340r/min revolving speed, obtains reactant；
(4) reactant is washed 1 ~ 3 time with dehydrated alcohol, is filtered by vacuum, takes filter cake to be washed with deionized 3 ~ 5 times, be placed in perseverance
1 ~ 2h is dried in warm drying box under conditions of 60 ~ 80 DEG C, obtains graft polymers crude product；
(5) by graft polymers crude product adding into acetone, it is placed in 10 ~ 12h of extracting separation under Soxhlet extraction device, then be placed in vacuum
1 ~ 2h is dried in vacuo in drying box under conditions of 3 ~ 5KPa, 40 ~ 60 DEG C, obtains carboxymethyl cellulose graft polymers.
The carboxymethyl cellulose, acrylamide, sulfuric acid, potassium permanganate, azodiisobutyronitrile, deionized water, acetone
Parts by weight be 60 ~ 80 parts of carboxymethyl celluloses, 30 ~ 40 parts of acrylamides, 6 ~ 8 parts of mass concentrations 10% sulfuric acid, 1 ~ 3 part of height
Potassium manganate, 4 ~ 6 parts of azodiisobutyronitriles, 120 ~ 160 parts of deionized waters, 80 ~ 100 parts of acetone.
The present invention is compared with other methods, and advantageous effects are:
(1) present invention prepares the external waterproof layer of Disposable, nonwoven medical protective material using Kynoar as raw material, gathers inclined
The basic component units of vinyl fluoride are CH2=CF2, are to be made of two fluorine atoms instead of two hydrogen atoms in ethylene,
Two fluorine atoms all tend to the same side, and combine with a carbon atom, Kynoar there are five types of different crystalline structures,
Including three kinds of polarized crystal forms and two kinds of non-polarised crystal forms, these crystalline phases of Kynoar are differently depending on point
Sub- conformation is cis- or trans- connection, Kynoar have excellent chemical corrosion resistance, oxidative resistance, wearability,
Impact resistance etc. is not corroded by acid, alkali at room temperature, Kynoar is placed in high-voltage electrostatic field by electrostatic spinning technique
In, a large amount of electrostatic charge can be shifted and is enriched with Kynoar droplet surface, so that pole occurs with Kynoar
Change and start mutually exclusive generation deformation, after charge repulsion is greater than the surface tension of liquid, droplet surface will rapid disruption
Or splitting, at the small jet stream of many polymer, these jet streams are spouting by high speed, and within an extremely short time, process is molten
Agent is quickly volatilized, and after solidification and high speed the super drawing effect of jet stream, is deposited on to receive to stack to be formed on substrate and is gathered inclined fluorine
Ethylene nanofiber is membranaceous, this, which makes Kynoar not only, has good waterproof performance, additionally it is possible to absorb vapor rapidly
And outside transfer spreading；
(2) present invention is using polyacrylamide, polyvinyl alcohol as raw material, and is gathered by addition carboxymethyl cellulose graft acrylamide
Object and casein are closed, the middle water absorbing layer of Disposable, nonwoven medical protective material is prepared, polyacrylamide is a kind of linear
Organic high molecular polymer, the amide groups in polyacrylamide is non-ionic hydrophilic group, has good water imbibition, water suction
Amount is big, and salt tolerance is strong, and polyacrylamide and polyvinyl alcohol will form three-dimensional net structure, the two after being crosslinked after electrostatic spinning
Between mechanical property and water absorbing capacity can mutual reinforcement, carboxymethyl cellulose graft polymers have raw material be easy to obtain extensively
It takes, the advantage good to environment affinity, is grafting skeleton with carboxymethyl cellulose element, is copolymerized with acrylamide, Ke Yijie
Water-swellable type macromolecule resin in structure containing great amount of hydroxy group, the super moisture absorbing resin tool of carboxymethyl cellulose graft polymers preparation
There are excellent salt tolerance, resistance to acid and alkali and biocompatibility, casein has good water imbibition and biocompatibility, therein
Polypeptide can improve the stability and water imbibition of material together with the molecular entanglement of carboxymethyl cellulose graft polymers, and
Nano fibrous membrane is formed under electrostatic spinning technique is attached to the surface of water absorption layer to keep good air permeability effect.
Specific embodiment
According to parts by weight, it is dense that 60 ~ 80 parts of carboxymethyl celluloses, 30 ~ 40 parts of acrylamides, 6 ~ 8 parts of quality are weighed respectively
Sulfuric acid, 1 ~ 3 part of potassium permanganate, 4 ~ 6 parts of azodiisobutyronitriles, 120 ~ 160 parts of deionized waters, 80 ~ 100 parts of acetone of degree 10%, will
Carboxymethyl cellulose is added in ionized water, stirs 30 ~ 40min under 40 ~ 50 DEG C of water bath condition with 200 ~ 240r/min revolving speed,
Heat preservation, obtain cmc soln, by azodiisobutyronitrile just, sulfuric acid, potassium permanganate be added cmc soln in,
It is passed through nitrogen protection with the air velocity of 30 ~ 40mL/min, is stirred under 40 ~ 50 DEG C of water bath condition with 240 ~ 280r/min revolving speed
Mix 10 ~ 15min, obtain initiation system, by acrylamide be added initiation system in, 30 ~ 40mL/min nitrogen atmosphere, 40 ~ 50
DEG C water bath condition under, 3 ~ 5h is stirred to react with 300 ~ 340r/min revolving speed, obtains reactant, reactant is washed with dehydrated alcohol
1 ~ 3 time, vacuum filtration takes filter cake to be washed with deionized 3 ~ 5 times, is placed in thermostatic drying chamber and does under conditions of 60 ~ 80 DEG C
Dry 1 ~ 2h obtains graft polymers crude product, by graft polymers crude product adding into acetone, is placed in extracting point under Soxhlet extraction device
From 10 ~ 12h, then it is placed in a vacuum drying oven 1 ~ 2h of vacuum drying under conditions of 3 ~ 5KPa, 40 ~ 60 DEG C, obtains carboxymethyl cellulose
Plain graft polymers, then according to parts by weight, 40 ~ 60 parts of polyacrylamides, 20 ~ 30 parts of polyvinyl alcohol, 20 ~ 30 parts are weighed respectively
Carboxymethyl cellulose graft polymers, 6 ~ 8 parts of casein, 160 ~ 240 parts of n,N-Dimethylformamide, are added N for polyvinyl alcohol,
In dinethylformamide, 10 ~ 20min is stirred with 200 ~ 240r/min revolving speed under room temperature, poly-vinyl alcohol solution is obtained, by polypropylene
Amide, carboxymethyl cellulose graft polymers are added in poly-vinyl alcohol solution, are placed in magnetic stirrer, in 30 ~ 40 DEG C of item
4 ~ 8h is stirred with 300 ~ 320r/min revolving speed under part, heat preservation obtains mixed solution, casein is added in mixed solution, 30 ~ 40
1 ~ 2h is stirred with 220 ~ 240r/min revolving speed under conditions of DEG C, obtains spinning solution, spinning solution is placed in the note that spinneret internal diameter is 1mm
It is anode, aluminium foil ground connection for cathode using copper wire, the distance between spinneret and aluminium foil are 16 ~ 20cm, in relative humidity in emitter
40%~50%, under conditions of 22 ~ 28 DEG C of temperature, voltage are 14 ~ 18kV, spinning solution is sprayed by aluminium with the flow velocity of 1.6 ~ 2.0mL/h
Spinning is carried out on foil, is cut, and obtains the polyacrylamide composite polyvinyl alcohol water absorption layer that specification is 100mm × 100mm, then by weight
Number meter weighs 40 ~ 50 parts of Kynoar, 120 ~ 150 parts of n,N-Dimethylformamide, 80 ~ 100 parts of acetone, by third respectively
N is added in ketone, in N- dimethyl formyl, stirs 12 ~ 16min under room temperature with 200 ~ 240r/min revolving speed, obtains N, N- dimethyl formyl
Kynoar is added in n,N-Dimethylformamide acetone soln amine acetone soln, is turned under room temperature with 240 ~ 300r/min
Speed 30 ~ 40min of stirring, obtains Kynoar spinning solution, and Kynoar spinning solution is placed in the note that spinneret internal diameter is 0.5mm
It is anode, aluminium foil ground connection for cathode using copper wire, the distance between spinneret and aluminium foil are 16 ~ 20cm, in relative humidity in emitter
40%~50%, under conditions of 28 ~ 30 DEG C of temperature, voltage are 12 ~ 14kV, Kynoar is spun with the flow velocity of 0.2 ~ 0.4mL/h
Silk liquid is sprayed on aluminium foil and carries out spinning, cuts, and obtains the polyvinylidene fluoride film that specification is 100mm × 100mm, takes the block specifications to be
The water suction of polyacrylamide composite polyvinyl alcohol is placed on bamboo fiber by the original bamboo fabric of 100mm × 100mm, then will
Polyvinylidene fluoride film is placed on polyacrylamide composite polyvinyl alcohol water absorption layer, and places a thickness respectively among two interlayers
Degree is the EVA hot-melt adhesive of 0.6 ~ 0.8mm, obtains mixing layer material, heats and protects under conditions of mixing layer material is placed in 120 ~ 140 DEG C
1 ~ 2h of temperature, room temperature cooling obtain Disposable, nonwoven medical protective material.
Embodiment 1
According to parts by weight, 60 parts of carboxymethyl celluloses, 30 parts of acrylamides, the sulfuric acid of 6 parts of mass concentrations 10%, 1 are weighed respectively
Part potassium permanganate, 4 parts of azodiisobutyronitriles, 120 parts of deionized waters, 80 parts of acetone, carboxymethyl cellulose is added in ionized water,
30min is stirred with 200r/min revolving speed under 40 DEG C of water bath condition, heat preservation obtains cmc soln, and azo two is different
Butyronitrile just, sulfuric acid, potassium permanganate be added cmc soln in, nitrogen protection is passed through with the air velocity of 30mL/min,
10min is stirred with 240r/min revolving speed under 40 DEG C of water bath condition, obtains initiation system, initiation system is added in acrylamide
In, under the nitrogen atmosphere of 30mL/min, 40 DEG C of water bath condition, 3h is stirred to react with 300r/min revolving speed, obtains reactant, it will
Reactant is washed 1 time with dehydrated alcohol, and vacuum filtration takes filter cake to be washed with deionized 3 ~ 5 times, is placed in thermostatic drying chamber
Dry 1h, obtains graft polymers crude product, by graft polymers crude product adding into acetone, is placed in cable-styled pumping under conditions of 60 DEG C
Extracting separation 10h under device is mentioned, then is placed in a vacuum drying oven and is dried in vacuo 1h under conditions of 3KPa, 40 DEG C, obtains carboxymethyl fibre
Plain graft polymers is tieed up, then according to parts by weight, weighs 40 parts of polyacrylamides, 20 parts of polyvinyl alcohol, 20 parts of carboxymethyls respectively
N, N- dimethyl formyl is added in polyvinyl alcohol by cellulose grafted polymer, 6 parts of casein, 160 parts of n,N-Dimethylformamide
In amine, 10min is stirred with 200r/min revolving speed under room temperature, poly-vinyl alcohol solution is obtained, polyacrylamide, carboxymethyl cellulose is connect
Branch polymer is added in poly-vinyl alcohol solution, is placed in magnetic stirrer, with the stirring of 300r/min revolving speed under conditions of 30 DEG C
4h, heat preservation, obtains mixed solution, and casein is added in mixed solution, stirs 1h under conditions of 30 DEG C with 220r/min revolving speed,
Spinning solution is obtained, spinning solution is placed in the syringe that spinneret internal diameter is 1mm, is anode, aluminium foil ground connection for cathode using copper wire, spray
Silk the distance between mouth and aluminium foil are 16cm, in relative humidity 40%, under conditions of 22 DEG C of temperature, voltage are 14kV, with 1.6mL/
Spinning solution is sprayed on aluminium foil and carries out spinning by the flow velocity of h, cuts, and it is compound poly- to obtain the polyacrylamide that specification is 100mm × 100mm
Vinyl alcohol water absorption layer, then according to parts by weight, 40 parts of Kynoar, 120 parts of n,N-Dimethylformamide, 80 parts are weighed respectively
N is added in acetone by acetone, in N- dimethyl formyl, is stirred 12min under room temperature with 200r/min revolving speed, is obtained N, N- dimethyl methyl
Amide acetone soln Kynoar is added in n,N-Dimethylformamide acetone soln, with 240r/min revolving speed under room temperature
30min is stirred, Kynoar spinning solution is obtained, Kynoar spinning solution is placed in the syringe that spinneret internal diameter is 0.5mm
In, it is anode, aluminium foil ground connection for cathode using copper wire, the distance between spinneret and aluminium foil are 16cm, in relative humidity 40%, temperature
Under conditions of 28 DEG C of degree, voltage are 12kV, Kynoar spinning solution is sprayed on aluminium foil with the flow velocity of 0.2mL/h and is spun
Silk is cut, and obtains the polyvinylidene fluoride film that specification is 100mm × 100mm, and taking a block specifications is the bamboo fiber of 100mm × 100mm
The water suction of polyacrylamide composite polyvinyl alcohol is placed on bamboo fiber, then polyvinylidene fluoride film is placed in polypropylene by fabric
On amide composite polyvinyl alcohol water absorption layer, and place the EVA hot-melt adhesive that a layer thickness is 0.6mm respectively among two interlayers,
Layer material must be mixed, heating and thermal insulation 1h under conditions of mixing layer material is placed in 120 DEG C, room temperature cooling obtains Disposable, nonwoven
Medical protective material.
Embodiment 2
According to parts by weight, 70 parts of carboxymethyl celluloses, 35 parts of acrylamides, the sulfuric acid of 7 parts of mass concentrations 10%, 2 are weighed respectively
Part potassium permanganate, 5 parts of azodiisobutyronitriles, 140 parts of deionized waters, 90 parts of acetone, carboxymethyl cellulose is added in ionized water,
35min is stirred with 220r/min revolving speed under 45 DEG C of water bath condition, heat preservation obtains cmc soln, and azo two is different
Butyronitrile just, sulfuric acid, potassium permanganate be added cmc soln in, nitrogen protection is passed through with the air velocity of 35mL/min,
13min is stirred with 260r/min revolving speed under 40 ~ 50 DEG C of water bath condition, initiation system is obtained, primosome is added in acrylamide
In system, under the nitrogen atmosphere of 35mL/min, 45 DEG C of water bath condition, 4h is stirred to react with 320r/min revolving speed, obtains reactant,
Reactant is washed 2 times with dehydrated alcohol, is filtered by vacuum, is taken filter cake to be washed with deionized 4 times, be placed in thermostatic drying chamber
Dry 1.5h, obtains graft polymers crude product, graft polymers crude product adding into acetone is placed in cable-styled under conditions of 70 DEG C
Extracting separation 11h under extractor, then be placed in a vacuum drying oven and be dried in vacuo 1.5h under conditions of 4KPa, 50 DEG C, obtain carboxylic first
Base cellulose grafted polymer, then according to parts by weight, 50 parts of polyacrylamides, 25 parts of polyvinyl alcohol, 25 parts of carboxylics are weighed respectively
N, N- dimethyl is added in polyvinyl alcohol by methylcellulose graft polymers, 7 parts of casein, 200 parts of n,N-Dimethylformamide
In formamide, 15min is stirred with 220r/min revolving speed under room temperature, poly-vinyl alcohol solution is obtained, by polyacrylamide, carboxymethyl cellulose
Plain graft polymers is added in poly-vinyl alcohol solution, is placed in magnetic stirrer, with 310r/min revolving speed under conditions of 35 DEG C
6h is stirred, heat preservation obtains mixed solution, and casein is added in mixed solution, is stirred under conditions of 35 DEG C with 230r/min revolving speed
1.5h is mixed, spinning solution is obtained, spinning solution is placed in the syringe that spinneret internal diameter is 1mm, is by anode, aluminium foil ground connection of copper wire
Cathode, the distance between spinneret and aluminium foil are 18cm, in relative humidity 45%, under conditions of 25 DEG C of temperature, voltage are 16kV,
Spinning solution is sprayed on aluminium foil with the flow velocity of 1.8mL/h and carries out spinning, is cut, the polyacrylamide that specification is 100mm × 100mm is obtained
Amine composite polyvinyl alcohol water absorption layer, then according to parts by weight, 45 parts of Kynoar, 135 parts of N, N- dimethyl methyl are weighed respectively
N is added in acetone by amide, 90 parts of acetone, in N- dimethyl formyl, is stirred 14min under room temperature with 220r/min revolving speed, is obtained N, N-
Dimethylformamide acetone soln Kynoar is added in n,N-Dimethylformamide acetone soln, with 270r/ under room temperature
Min revolving speed stirs 35min, obtains Kynoar spinning solution, and it is 0.5mm's that Kynoar spinning solution, which is placed in spinneret internal diameter,
It is anode, aluminium foil ground connection for cathode using copper wire, the distance between spinneret and aluminium foil are 18cm, in relative humidity in syringe
45%, under conditions of 29 DEG C of temperature, voltage are 13kV, it is enterprising that Kynoar spinning solution is sprayed by aluminium foil with the flow velocity of 0.3mL/h
Row spinning is cut, and obtains the polyvinylidene fluoride film that specification is 100mm × 100mm, takes the bamboo that a block specifications are 100mm × 100mm former
The water suction of polyacrylamide composite polyvinyl alcohol is placed on bamboo fiber, then polyvinylidene fluoride film is placed in poly- by fabric
On acrylamide composite polyvinyl alcohol water absorption layer, and the EVA that a layer thickness is 0.7mm is placed respectively among two interlayers and is heated
Glue obtains mixing layer material, and heating and thermal insulation 1.5h under conditions of mixing layer material is placed in 130 DEG C, room temperature cooling obtains disposably non-
Weave medical protective material.
Embodiment 3
According to parts by weight, 80 parts of carboxymethyl celluloses, 40 parts of acrylamides, the sulfuric acid of 8 parts of mass concentrations 10%, 3 are weighed respectively
Part potassium permanganate, 6 parts of azodiisobutyronitriles, 160 parts of deionized waters, 100 parts of acetone, are added ionized water for carboxymethyl cellulose
In, 40min is stirred with 240r/min revolving speed under 50 DEG C of water bath condition, heat preservation obtains cmc soln, by azo two
Isobutyronitrile just, sulfuric acid, potassium permanganate be added cmc soln in, with the air velocity of 40mL/min be passed through nitrogen protect
Shield stirs 15min under 50 DEG C of water bath condition with 280r/min revolving speed, obtains initiation system, primosome is added in acrylamide
In system, under the nitrogen atmosphere of 40mL/min, 50 DEG C of water bath condition, 5h is stirred to react with 340r/min revolving speed, obtains reactant,
Reactant is washed 3 times with dehydrated alcohol, is filtered by vacuum, is taken filter cake to be washed with deionized 5 times, be placed in thermostatic drying chamber
Dry 2h, obtains graft polymers crude product, by graft polymers crude product adding into acetone, is placed in cable-styled pumping under conditions of 80 DEG C
Extracting separation 12h under device is mentioned, then is placed in a vacuum drying oven and is dried in vacuo 2h under conditions of 5KPa, 60 DEG C, obtains carboxymethyl fibre
Plain graft polymers is tieed up, then according to parts by weight, weighs 60 parts of polyacrylamides, 30 parts of polyvinyl alcohol, 30 parts of carboxymethyls respectively
N, N- dimethyl formyl is added in polyvinyl alcohol by cellulose grafted polymer, 8 parts of casein, 240 parts of n,N-Dimethylformamide
In amine, 20min is stirred with 240r/min revolving speed under room temperature, poly-vinyl alcohol solution is obtained, polyacrylamide, carboxymethyl cellulose is connect
Branch polymer is added in poly-vinyl alcohol solution, is placed in magnetic stirrer, with the stirring of 320r/min revolving speed under conditions of 40 DEG C
8h, heat preservation, obtains mixed solution, and casein is added in mixed solution, stirs 2h under conditions of 40 DEG C with 240r/min revolving speed,
Spinning solution is obtained, spinning solution is placed in the syringe that spinneret internal diameter is 1mm, is anode, aluminium foil ground connection for cathode using copper wire, spray
Silk the distance between mouth and aluminium foil are 20cm, in relative humidity 50%, under conditions of 28 DEG C of temperature, voltage are 18kV, with 2.0mL/
Spinning solution is sprayed on aluminium foil and carries out spinning by the flow velocity of h, cuts, and it is compound poly- to obtain the polyacrylamide that specification is 100mm × 100mm
Vinyl alcohol water absorption layer, then according to parts by weight, 50 parts of Kynoar, 150 parts of n,N-Dimethylformamide, 100 are weighed respectively
Acetone is added N, in N- dimethyl formyl, stirs 16min under room temperature with 240r/min revolving speed, obtain N, N- dimethyl by part acetone
Kynoar is added in n,N-Dimethylformamide acetone soln formamide acetone soln, is turned under room temperature with 300r/min
Speed stirring 40min, obtains Kynoar spinning solution, and Kynoar spinning solution is placed in the injection that spinneret internal diameter is 0.5mm
It is anode, aluminium foil ground connection for cathode using copper wire in device, the distance between spinneret and aluminium foil are 20cm, in relative humidity 50%,
Under conditions of 30 DEG C of temperature, voltage are 14kV, Kynoar spinning solution is sprayed on aluminium foil with the flow velocity of 0.4mL/h and is spun
Silk is cut, and obtains the polyvinylidene fluoride film that specification is 100mm × 100mm, and taking a block specifications is the bamboo fiber of 100mm × 100mm
The water suction of polyacrylamide composite polyvinyl alcohol is placed on bamboo fiber, then polyvinylidene fluoride film is placed in polypropylene by fabric
On amide composite polyvinyl alcohol water absorption layer, and place the EVA hot-melt adhesive that a layer thickness is 0.8mm respectively among two interlayers,
Layer material must be mixed, heating and thermal insulation 2h under conditions of mixing layer material is placed in 140 DEG C, room temperature cooling obtains Disposable, nonwoven
Medical protective material.
Disposable, nonwoven medical protective material prepared by the present invention and medical protective material are detected, it is specific to detect
As a result such as following table table 1:
Quantitative measurement:
Ultimate strength test establishing criteria " GB/T3923.1-1997 fabric tension performance part 1: ultimate strength and splits elongation
The measurement galley proof method of rate "
Tear strength tests establishing criteria, and " GB/T3917.1-1997 fabric tear performance part 1: Single-rip method sample is torn by force
The measurement of power "
Seepage of water test:
Spray rating tests experimental evidence " GB/T, 4745-1997 textile fabric surface moisture resistance measure dip experiment ", and method is such as
Under:
250ml distilled water is measured with graduated cylinder, in hopper, sprays sample from 30cm height, observation specimen surface bedews situation,
Then it is shone by grading sample and rating scale text evaluates spray rating.Scaling Standards are as follows:
It does not adsorb or bedews in the sample front 5 grades: 100-；
There is slight irregular adhesional wetting in the sample front 4 grades: 90-；
The sample front 3 grades: 80- bedews at spray；
The part adhesional wetting of 2 grades: 70- sample front；
The all adhesional wettings of 1 grade: 50- sample front；
It refuses oil and refuses alcohol testing:
Oil test is refused according to AATCC-118-1997 testing standard: sample being laid flat in the plane, gradually chooses phase from low to high
Reagent is answered, (liquid refuses oil such as table 5.5, it drips in the non-conterminous place of sample, every drop diameter about 5mm, if cloth cover does not moisten in 30s
Wet phenomenon, then sample is then proceeded to test and is stopped until can't pass by the grade, take finally by grade.Standard is oil droplet
Place's fabric deepens or oil droplet disappears, the imbibition of oil droplet outer ring and oil droplet flash of light disappear.
Comfort property test:
1. vapor transfer rate is tested
Laboratory apparatus: the computermatic fabric moisture transmission instrument test parameters of YG601-I/II type: reference standard BS7209:1990.
2. air permeability test
Laboratory apparatus: YG461 fabric air-permeability amount instrument
Experiment parameter: referring to GB/T, the measurement of 5453-1997 textile fabric gas permeability
1 Disposable, nonwoven medical protective material of table can characterize
Disposable, nonwoven medical protective material prepared by the present invention as shown in Table 1, mechanical property is good, and water and oil repellant refuses Alcoholic
Can be good, effective protective action can be played and comfort is high.
Claims (10)
1. a kind of preparation method of Disposable, nonwoven medical protective material, which is characterized in that specific preparation step are as follows:
(1) taking a block specifications is the original bamboo fabric of 100mm × 100mm, by polyacrylamide composite polyvinyl alcohol water absorption layer
It is placed on bamboo fiber, then polyvinylidene fluoride film is placed on polyacrylamide composite polyvinyl alcohol water absorption layer, and pressed from both sides at two
Layer is intermediate to place one layer of EVA hot-melt adhesive respectively, obtains mixing layer material；
(2) 1 ~ 2h of heating and thermal insulation under conditions of mixing layer material being placed in 120 ~ 140 DEG C, room temperature cooling obtain Disposable, nonwoven
Medical protective material.
2. a kind of preparation method of Disposable, nonwoven medical protective material according to claim 1, which is characterized in that step
Suddenly EVA hot-melt adhesive layer described in (1) with a thickness of 0.6 ~ 0.8mm.
3. a kind of preparation method of Disposable, nonwoven medical protective material according to claim 1, which is characterized in that step
Suddenly the specific preparation step of polyvinylidene fluoride film described in (1) are as follows:
(1) acetone is added N, in N- dimethyl formyl, 12 ~ 16min is stirred with 200 ~ 240r/min revolving speed under room temperature, obtains N, N-
Dimethylformamide acetone soln；
(2) Kynoar is added in n,N-Dimethylformamide acetone soln, is stirred under room temperature with 240 ~ 300r/min revolving speed
30 ~ 40min is mixed, Kynoar spinning solution is obtained；
(3) Kynoar spinning solution is placed in the syringe that spinneret internal diameter is 0.5mm, is connect by anode, aluminium foil of copper wire
Kynoar spinning solution is sprayed on aluminium foil and carries out spinning by the earth pertaining to YIN pole, cuts, and obtaining specification is the poly- inclined of 100mm × 100mm
Fluoride film.
4. a kind of preparation method of Disposable, nonwoven medical protective material according to claim 3, which is characterized in that institute
The Kynoar stated, N,N-dimethylformamide, acetone parts by weight are 40 ~ 50 parts of Kynoar, 120 ~ 150 parts of N, N- bis-
Methylformamide, 80 ~ 100 parts of acetone.
5. a kind of preparation method of Disposable, nonwoven medical protective material according to claim 3, which is characterized in that step
Suddenly the distance between spinneret and aluminium foil described in (3) are 16 ~ 20cm, and the condition of electrostatic spinning is relative humidity 40%~50%,
28 ~ 30 DEG C of temperature, voltage are 12 ~ 14kV, and the flow velocity of Kynoar spinning solution is 0.2 ~ 0.4mL/h.
6. a kind of preparation method of Disposable, nonwoven medical protective material according to claim 1, which is characterized in that step
Suddenly the specific preparation step of polyacrylamide composite polyvinyl alcohol water absorption layer described in (1):
(1) polyvinyl alcohol is added in n,N-Dimethylformamide, 10 ~ 20min is stirred with 200 ~ 240r/min revolving speed under room temperature,
Obtain poly-vinyl alcohol solution；
(2) polyacrylamide, carboxymethyl cellulose graft polymers are added in poly-vinyl alcohol solution, are placed in magnetic stirrer
In, 4 ~ 8h is stirred with 300 ~ 320r/min revolving speed under conditions of 30 ~ 40 DEG C, heat preservation obtains mixed solution；
(3) casein is added in mixed solution, 1 ~ 2h is stirred with 220 ~ 240r/min revolving speed under conditions of 30 ~ 40 DEG C, is obtained
Spinning solution；
(4) spinning solution is placed in the syringe that spinneret internal diameter is 1mm, is anode, aluminium foil ground connection for cathode using copper wire, spinneret
The distance between mouth and aluminium foil are 16 ~ 20cm, in relative humidity 40%~50%, 22 ~ 28 DEG C of temperature, the item that voltage is 14 ~ 18kV
Under part, spinning solution is sprayed on aluminium foil with the flow velocity of 1.6 ~ 2.0mL/h and carries out spinning, cut, obtaining specification is 100mm × 100mm
Polyacrylamide composite polyvinyl alcohol water absorption layer.
7. a kind of preparation method of Disposable, nonwoven medical protective material according to claim 6, which is characterized in that institute
The weight of the polyacrylamide, polyvinyl alcohol, carboxymethyl cellulose graft polymers, casein, N,N-dimethylformamide stated
Part is 40 ~ 60 parts of polyacrylamides, 20 ~ 30 parts of polyvinyl alcohol, 20 ~ 30 parts of carboxymethyl cellulose graft polymers, 6 ~ 8 portions of cheese
Element, 160 ~ 240 parts of N,N-dimethylformamides.
8. a kind of preparation method of Disposable, nonwoven medical protective material according to claim 6, which is characterized in that step
Suddenly the distance between spinneret and aluminium foil described in (4) be 16 ~ 20cm, spinning condition be relative humidity 40%~50%, temperature 22 ~
28 DEG C, voltage be 14 ~ 18kV, the flow velocity of spinning solution is 1.6 ~ 2.0mL/h.
9. a kind of preparation method of Disposable, nonwoven medical protective material according to claim 6, which is characterized in that step
Suddenly carboxymethyl cellulose graft polymers described in (2) specific the preparation method comprises the following steps:
(1) carboxymethyl cellulose is added in ionized water, with the stirring of 200 ~ 240r/min revolving speed under 40 ~ 50 DEG C of water bath condition
30 ~ 40min, heat preservation, obtains cmc soln；
(2) by azodiisobutyronitrile just, sulfuric acid, potassium permanganate be added cmc soln in, with the gas of 30 ~ 40mL/min
Flow velocity degree is passed through nitrogen protection, stirs 10 ~ 15min under 40 ~ 50 DEG C of water bath condition with 240 ~ 280r/min revolving speed, must cause
System；
(3) acrylamide is added in initiation system, under the nitrogen atmosphere of 30 ~ 40mL/min, 40 ~ 50 DEG C of water bath condition,
It is stirred to react 3 ~ 5h with 300 ~ 340r/min revolving speed, obtains reactant；
(4) reactant is washed 1 ~ 3 time with dehydrated alcohol, is filtered by vacuum, takes filter cake to be washed with deionized 3 ~ 5 times, be placed in perseverance
1 ~ 2h is dried in warm drying box under conditions of 60 ~ 80 DEG C, obtains graft polymers crude product；
(5) by graft polymers crude product adding into acetone, it is placed in 10 ~ 12h of extracting separation under Soxhlet extraction device, then be placed in vacuum
1 ~ 2h is dried in vacuo in drying box under conditions of 3 ~ 5KPa, 40 ~ 60 DEG C, obtains carboxymethyl cellulose graft polymers.
10. a kind of preparation method of Disposable, nonwoven medical protective material according to claim 6, which is characterized in that
The carboxymethyl cellulose, acrylamide, sulfuric acid, potassium permanganate, azodiisobutyronitrile, deionized water, the parts by weight of acetone
For 60 ~ 80 parts of carboxymethyl celluloses, 30 ~ 40 parts of acrylamides, the sulfuric acid of 6 ~ 8 parts of mass concentrations 10%, 1 ~ 3 part of potassium permanganate, 4 ~
6 parts of azodiisobutyronitriles, 120 ~ 160 parts of deionized waters, 80 ~ 100 parts of acetone.
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