CN113774564A - Tear-resistant antibacterial non-woven fabric and preparation method thereof - Google Patents
Tear-resistant antibacterial non-woven fabric and preparation method thereof Download PDFInfo
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- CN113774564A CN113774564A CN202111221287.7A CN202111221287A CN113774564A CN 113774564 A CN113774564 A CN 113774564A CN 202111221287 A CN202111221287 A CN 202111221287A CN 113774564 A CN113774564 A CN 113774564A
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/02—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from cellulose, cellulose derivatives, or proteins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/009—Condensation or reaction polymers
- D04H3/011—Polyesters
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
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Abstract
The invention discloses a tear-resistant antibacterial non-woven fabric and a preparation method thereof, wherein the tear-resistant antibacterial non-woven fabric comprises the following raw materials: polypropylene or modified polypropylene, proteoliposomes, succinoglycan, dicetyl stearyl dilinoleate, ceteth-2, zinc stearate. The tear-resistant antibacterial non-woven fabric has good mechanical properties such as antibacterial property, moisture absorption and air permeability, tear resistance and the like.
Description
Technical Field
The invention belongs to the technical field of non-woven fabric manufacturing, and particularly relates to a tear-resistant antibacterial non-woven fabric and a preparation method thereof.
Background
Nonwoven fabrics, also called non-woven fabrics, are generally made by orienting or randomly arranging chemical fibers such as polypropylene, polyester, viscose, etc., and plant fibers to form a fiber web structure, and then reinforcing the fiber web structure by mechanical, thermal or chemical methods. The non-woven fabric has the advantages of flexibility, light weight, air permeability, easiness in forming, no toxicity, recycling property, cotton texture and the like, is widely applied to the fields of medical treatment, sanitation and the like, such as operating gowns, protective clothing, masks, sanitary towels and the like, and can be directly contacted with wounds for bandaging to play an isolation role.
Chinese patent CN108950866B discloses an anti-tear non-woven fabric and a preparation method thereof, comprising the following steps: melting, mixing and loosening low-density polyethylene, fibrilia, polypropylene, polyisobutylene, a softening agent, a reinforcing modifier, an antistatic agent, a lubricant and nano polytetrafluoroethylene, carding the mixture by a carding machine to form a web, and drafting the web by a drafting machine; feeding the drafted fiber web into a spunlace area for carrying out first spunlace and second spunlace to form a non-woven fabric; cold bleaching, washing and drying. The non-woven fabric has good anti-tearing performance and antistatic performance, but the non-woven fabric has poor moisture absorption and antibacterial performance, so that the application of the non-woven fabric is limited.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a tear-resistant antibacterial non-woven fabric and a preparation method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that:
a preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 45-60 parts of polypropylene or modified polypropylene, 15-30 parts of protein superelastomer, 5-13 parts of succinoglycan, 6-9 parts of dicetyl stearyl alcohol dilinoleate, 1-4 parts of ceteth-2 and 0.3-1.2 parts of zinc stearate into a double-screw extruder, and treating for 30-40min under the conditions that the temperature is 240-250 ℃ and the screw rotation speed is 100-110rpm to obtain a molten body A1;
(2) spinning: extruding the melt A1 into filaments at 165-170 ℃ through a spinneret plate under the working pressure of 7-8MPa to obtain spinning A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 5-12 ℃, and the air speed is 13-16m/s, so as to obtain a blown yarn A3;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 70-75 ℃ to obtain a curtain web A4;
(5) consolidation: and fixing and molding the curtain web A4 at the temperature of 115-120 ℃ and under the pressure of 11-12MPa to obtain the tear-resistant antibacterial non-woven fabric.
The modified polypropylene is prepared by the following method:
uniformly mixing 80-100 parts by weight of polypropylene, 10-15 parts by weight of silicon carbide whisker and 3-5 parts by weight of 3- (trimethylsilyl) propyl acrylate, and then putting the mixture into a double-screw extruder for melt extrusion, wherein the extrusion temperature is 190-210 ℃, and the screw rotation speed is 100-200rpm, so as to obtain a polypropylene blend I; adding the polypropylene blend I into 6-10 wt% of tartronic acid aqueous solution according to the solid-to-liquid ratio of 1kg (5-8) L, heating to 70-80 ℃, stirring at the rotating speed of 500-800rpm for 30-50min, filtering, washing with water, and drying in an oven at 50-60 ℃ for 5-8h to obtain a polypropylene blend II; adding the polypropylene blend II into a keratin aqueous solution with the weight percentage of 1kg (5-8) L to be heated to 35-40 ℃ and stirred at the rotating speed of 300-500rpm for 120-180min, filtering, washing, and drying in an oven with the temperature of 60-80 ℃ for 3-5h to obtain the modified polypropylene.
The preparation method of the protein super-elastomer comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide, stirring, adding zinc lactate, and stirring to obtain protein solution;
b2 mixing polycaprolactone, polyurethane, dimethyl sulfoxide and n-hexane, heating and stirring to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluyl peroxybenzoic acid and the bentonite, heating and stirring, centrifuging to remove the redundant liquid phase, and placing the obtained solid in an oven for drying to obtain the protein super-elastomer.
The keratin peptide chain is distributed in multiple structural domains, wherein the polypeptide chain can be divided into a rod-shaped middle region and a terminal peptide region with high retention, the peptide chain of the rod-shaped structural domain has a periodic sequence structure of 8 peptide repeats, the intermediate fibrillar eggs have similar peptide chain structures, the keratin peptide chain is a typical alpha helix, an allogenic complex helix formed by combining acidic and basic keratin peptide chains is a characteristic conformation form of the keratin, and the unique conformation enables the keratin to have higher elasticity and toughness.
However, if keratin is directly put into a polypropylene system, the keratin and the polypropylene system have large polarity difference on the molecular structures, and the compatibility of the keratin and the polypropylene system is poor, so that the prepared product is easy to generate the phenomena of cracking, cracking and the like caused by internal stress in the service process.
The present invention therefore aims to treat keratin by the specific process described and to apply it to a process for the production of high-strength nonwovens.
Polycaprolactone is very soft in texture, has extremely high extensibility and low-temperature impact, has good biocompatibility, and has good compatibility with a non-woven fabric substrate, namely polypropylene, so that the mechanical strength and fatigue resistance of the non-woven fabric taking polypropylene as a base material can be improved by combining polycaprolactone with keratin, and the polycaprolactone is very suitable for being used in the biological application fields of medicine and the like. The polyurethane has good chemical resistance and rebound resilience, easy processing, low water absorption, low temperature resistance, aging resistance, high hardness and elasticity.
However, if the polyurethane is directly and separately added into a polypropylene system, the inherent polarity difference exists in the molecular structures of the polyurethane and the polypropylene system, so that the compatibility of the polyurethane and the polypropylene system is poor, and the product is easy to crack, break and other damage phenomena in the service process; however, the coordination between the polyurethane and polypropylene systems can be enhanced by the keratin coupling effect, so that the rigidity of the whole material is enhanced, wherein the tearing strength of the non-woven fabric is increased.
Preferably, the preparation method of the protein superelastic body comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide at 22-27 deg.C at bath ratio of (2.5-4) g (85-110) mL, stirring at 130-150rpm for 3-6min, adding zinc lactate 0.28-0.64% of the weight of the keratin, and stirring at 130-150rpm for 10-15min to obtain protein solution;
b2 mixing polycaprolactone, polyurethane, dimethyl sulfoxide and n-hexane according to the mass ratio of (3.5-5): 6.4-8.9): 18-22.8): 13-16.5, heating to 52-55 ℃, and stirring at the rotating speed of 80-100rpm for 16-20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluyl peroxybenzoic acid and the bentonite according to the mass ratio of (8-10): (27-32): (2-3.2): (0.4-0.6): (12.3-15.6), heating to 48-52 ℃, stirring at the rotating speed of 100 plus 120rpm for 22-25min, centrifuging at the rotating speed of 9000 plus 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at the temperature of 53-55 ℃ for 4-7h to obtain the protein superelastomer.
The zinc lactate can influence the alpha spiral unfolding angle of the keratin in the dimethyl sulfoxide due to the unique optical rotation of the zinc lactate, namely the keratin dissolved in the dimethyl sulfoxide and doped with the zinc lactate can be more fully compatible and entangled with polycaprolactone and polyurethane in the subsequent treatment process, so that the protein superelastic body has a high-elasticity micro molecular structure and good mechanical fatigue resistance.
According to the invention, dimethyl sulfoxide and n-hexane are used as compound solvents, so that the roll-off condition of a keratin peptide chain can be improved, and the combination of keratin, polycaprolactone and polyurethane is facilitated, which is benefited by the nonpolar strength and molecular weight of molecules of the two solvents.
The equivalent negative charge center formed by a plurality of oxygen atoms in the m-toluoyl peroxybenzoic acid can effectively interfere the normal physiological activities of pathogenic bacteria through the charge effect, inhibit the propagation and growth of the pathogenic bacteria, and further achieve the antibacterial effect.
The organic titanium is one or a mixture of two of isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and isopropyl isostearate titanium complex.
According to the invention, the isopropyl tri (dioctyl pyrophosphoryl oxy) titanate and the titanium isostearate complex are compounded to serve as an organic titanium source of the protein super elastomer, and the existence of the titanium element can enable the non-woven fabric to obtain an antibacterial effect, which is related to the photocatalytic capacity of the titanium element. In addition, titanate with phosphoryloxy groups and titanium isostearate complex with an isostearic acid structure can enhance the crosslinking degree among all components in the protein super elastomer, and bring remarkable improvement to the overall elastic modulus and rigidity of the protein super elastomer. That is, the two organic titanium materials used in the specific method of the invention not only enhance the antibacterial performance of the protein super-elastomer and the antibacterial non-woven fabric, but also enhance the mechanical strength of the two materials, thereby obtaining unexpected technical effects.
Preferably, the organic titanium is a mixture of isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and isopropyl isostearate titanium isopropoxide complex in a mass ratio of (1-3) to (1-3).
More preferably, the organic titanium is a mixture of isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and isopropyl isostearate titanium complex in a mass ratio of 1.3: 1.
The invention has the beneficial effects that: the tear-resistant antibacterial non-woven fabric disclosed by the invention has good tear resistance and antibacterial performance. The protein super-elastomer is added, and is compounded by taking keratin, polycaprolactone, polyurethane, organic titanium and the like as raw materials, so that the mechanical and antibacterial properties of the non-woven fabric are improved.
Detailed Description
The above summary of the present invention is described in further detail below with reference to specific embodiments, but it should not be understood that the scope of the above subject matter of the present invention is limited to the following examples.
Introduction of some raw materials in this application:
polypropylene, CAS: 9003-07-0, available from Xiamen, the most-available information technology Limited, model: PP-H5035, melt rolling rate: 3.44g/10 min.
Keratin, available from the codis chemical industry (Hubei) Co., Ltd., CAS: 169799-44-4, molecular weight: 64 kDa.
Polycaprolactone, CAS: 24980-41-4, available from Shandong Cuihua Biotech limited, molecular weight: 6 ten thousand.
Polyurethane, CAS: 9009-54-5, available from Shanghai Tuoden industries, Inc., under the trade designation: F3250A-F3298A, density: 1.2g/cm3。
Bentonite, CAS: 1302-78-9, purchased from Qinghong mineral processing plant, Lingshou county, with particle size: 1200 meshes.
Isopropyl tris (dioctyl pyrophosphato acyloxy) titanate, CAS: 67691-13-8, available from Wande chemical Co., Ltd.
Titanium isopropoxide isostearate complex, CAS: 68784-51-0, available from Shinshun Shu Biotechnology, Inc.
Succinoglycan, CAS: 73667-50-2, available from Hubei Nonakojic technologies, MW: 8000.
silicon carbide whisker, CAS: 409-21-2, available from Fosmann technologies, Inc. (Beijing), phi 500nm, 12 μm.
M-toluyl peroxybenzoic acid, CAS: 1712-87-4.
Dicetylstearyl dimer linoleate, CAS: 501901-81-1.
Ceteth-2, CAS: 5274-61-3.
Tartronic acid, CAS: 80-69-3.
3- (trimethylsilyl) propyl acrylate, CAS: 4369-14-6.
Example 1
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of polypropylene, 25 parts by weight of protein superelastomer, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl alcohol dilinoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotating speed is 100rpm to obtain a molten body A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
The preparation method of the protein super-elastomer comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide at a bath ratio of 3.5g:90mL at 25 deg.C, stirring at 150rpm for 3min, adding zinc lactate 0.6% of the weight of the keratin, and stirring at 150rpm for 10min to obtain protein solution;
b2 mixing polycaprolactone, polyurethane, dimethyl sulfoxide and n-hexane according to the mass ratio of 4:7:20:15, heating to 54 ℃, and stirring at the rotating speed of 100rpm for 20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluoyl peroxybenzoic acid and the bentonite according to the mass ratio of 10:30:3:0.5:14, heating to 50 ℃, stirring for 25min at the rotating speed of 120rpm, centrifuging at the rotating speed of 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at 55 ℃ for 5h to obtain the protein super-elastomer.
The organic titanium is a mixture of isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and isopropyl isostearate titanium complex in a mass ratio of 1.3: 1.
Example 2
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of polypropylene, 25 parts by weight of protein superelastomer, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl alcohol dilinoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotating speed is 100rpm to obtain a molten body A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
The preparation method of the protein super-elastomer comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide at a bath ratio of 3.5g:90mL at 25 deg.C, stirring at 150rpm for 3min, adding zinc lactate 0.6% of the weight of the keratin, and stirring at 150rpm for 10min to obtain protein solution;
b2 mixing polycaprolactone, polyurethane, dimethyl sulfoxide and n-hexane according to the mass ratio of 4:7:20:15, heating to 54 ℃, and stirring at the rotating speed of 100rpm for 20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluoyl peroxybenzoic acid and the bentonite according to the mass ratio of 10:30:3:0.5:14, heating to 50 ℃, stirring for 25min at the rotating speed of 120rpm, centrifuging at the rotating speed of 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at 55 ℃ for 5h to obtain the protein super-elastomer.
The organic titanium is isopropyl tri (dioctyl pyrophosphato acyloxy) titanate.
Example 3
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of polypropylene, 25 parts by weight of protein superelastomer, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl alcohol dilinoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotating speed is 100rpm to obtain a molten body A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
The preparation method of the protein super-elastomer comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide at a bath ratio of 3.5g:90mL at 25 deg.C, stirring at 150rpm for 3min, adding zinc lactate 0.6% of the weight of the keratin, and stirring at 150rpm for 10min to obtain protein solution;
b2 mixing polycaprolactone, polyurethane, dimethyl sulfoxide and n-hexane according to the mass ratio of 4:7:20:15, heating to 54 ℃, and stirring at the rotating speed of 100rpm for 20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluoyl peroxybenzoic acid and the bentonite according to the mass ratio of 10:30:3:0.5:14, heating to 50 ℃, stirring for 25min at the rotating speed of 120rpm, centrifuging at the rotating speed of 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at 55 ℃ for 5h to obtain the protein super-elastomer.
The organic titanium is titanium isostearate isopropoxide complex.
Example 4
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of polypropylene, 25 parts by weight of protein superelastomer, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl alcohol dilinoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotating speed is 100rpm to obtain a molten body A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
The preparation method of the protein super-elastomer comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide at a bath ratio of 3.5g:90mL at 25 deg.C, stirring at 150rpm for 3min, adding zinc lactate 0.6% of the weight of the keratin, and stirring at 150rpm for 10min to obtain protein solution;
b2 mixing polycaprolactone, polyurethane, dimethyl sulfoxide and n-hexane according to the mass ratio of 4:7:20:15, heating to 54 ℃, and stirring at the rotating speed of 100rpm for 20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium and the bentonite according to the mass ratio of 10:30:3:14, heating to 50 ℃, stirring for 25min at the rotating speed of 120rpm, centrifuging at the rotating speed of 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at 55 ℃ for 5h to obtain the protein superelastomer.
The organic titanium is a mixture of isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and isopropyl isostearate titanium complex in a mass ratio of 1.3: 1.
Example 5
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of polypropylene, 25 parts by weight of protein superelastomer, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl alcohol dilinoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotating speed is 100rpm to obtain a molten body A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
The preparation method of the protein super-elastomer comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide at a bath ratio of 3.5g:90mL at 25 deg.C, stirring at 150rpm for 3min, adding zinc lactate 0.6% of the weight of the keratin, and stirring at 150rpm for 10min to obtain protein solution;
b2 mixing polycaprolactone, dimethyl sulfoxide and n-hexane according to the mass ratio of 11:20:15, heating to 54 ℃, and stirring at the rotating speed of 100rpm for 20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluoyl peroxybenzoic acid and the bentonite according to the mass ratio of 10:30:3:0.5:14, heating to 50 ℃, stirring for 25min at the rotating speed of 120rpm, centrifuging at the rotating speed of 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at 55 ℃ for 5h to obtain the protein super-elastomer.
The organic titanium is a mixture of isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and isopropyl isostearate titanium complex in a mass ratio of 1.3: 1.
Example 6
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of polypropylene, 25 parts by weight of protein superelastomer, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl alcohol dilinoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotating speed is 100rpm to obtain a molten body A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
The preparation method of the protein super-elastomer comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide at a bath ratio of 3.5g:90mL at 25 deg.C, stirring at 150rpm for 3min, adding zinc lactate 0.6% of the weight of the keratin, and stirring at 150rpm for 10min to obtain protein solution;
b2 mixing polycaprolactone, polyurethane and dimethyl sulfoxide according to the mass ratio of 4:7:35, heating to 54 ℃, and stirring at the rotating speed of 100rpm for 20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluoyl peroxybenzoic acid and the bentonite according to the mass ratio of 10:30:3:0.5:14, heating to 50 ℃, stirring for 25min at the rotating speed of 120rpm, centrifuging at the rotating speed of 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at 55 ℃ for 5h to obtain the protein super-elastomer.
The organic titanium is a mixture of isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and isopropyl isostearate titanium complex in a mass ratio of 1.3: 1.
Example 7
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of polypropylene, 25 parts by weight of protein superelastomer, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl alcohol dilinoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotating speed is 100rpm to obtain a molten body A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
The preparation method of the protein super-elastomer comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide at 25 deg.C at bath ratio of 3.5g:90mL, and stirring at 150rpm for 13min to obtain protein solution;
b2 mixing polycaprolactone, polyurethane, dimethyl sulfoxide and n-hexane according to the mass ratio of 4:7:20:15, heating to 54 ℃, and stirring at the rotating speed of 100rpm for 20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluoyl peroxybenzoic acid and the bentonite according to the mass ratio of 10:30:3:0.5:14, heating to 50 ℃, stirring for 25min at the rotating speed of 120rpm, centrifuging at the rotating speed of 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at 55 ℃ for 5h to obtain the protein super-elastomer.
The organic titanium is a mixture of isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and isopropyl isostearate titanium complex in a mass ratio of 1.3: 1.
Example 8
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 80 parts by weight of polypropylene, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl dimer linoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotation speed is 100rpm to obtain a molten mass A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
Example 9
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of polypropylene, 25 parts by weight of polyester, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl dimer linoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotation speed is 100rpm to obtain a molten mass A1; the polyester is a mixture of polycaprolactone and polyurethane in a mass ratio of 4: 7;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
Example 10
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of polypropylene, 25 parts by weight of keratin, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl dimer linoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotating speed is 100rpm to obtain a molten mass A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
Example 11
A preparation method of a tear-resistant antibacterial non-woven fabric comprises the following steps:
(1) co-melting: putting 55 parts by weight of modified polypropylene, 25 parts by weight of protein superelastomer, 10 parts by weight of succinoglycan, 8 parts by weight of dicetyl stearyl alcohol dilinoleate, 3 parts by weight of ceteth-2 and 1 part by weight of zinc stearate into a double-screw extruder, and treating for 40min under the conditions that the temperature is 250 ℃ and the screw rotating speed is 100rpm to obtain a molten mass A1;
(2) spinning: extruding the melt A1 into filaments at 170 ℃ through a spinneret plate under the working pressure of 8MPa to obtain a spun yarn A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 10 ℃, and the air speed is 15m/s, so that a blown yarn A3 is obtained;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 75 ℃ to obtain a curtain web A4;
(5) consolidation: and (3) fixing and molding the curtain web A4 under the conditions that the temperature is 120 ℃ and the pressure is 12MPa to obtain the tear-resistant antibacterial non-woven fabric.
The preparation method of the protein super-elastomer comprises the following steps:
b1 dissolving keratin in dimethyl sulfoxide at a bath ratio of 3.5g:90mL at 25 deg.C, stirring at 150rpm for 3min, adding zinc lactate 0.6% of the weight of the keratin, and stirring at 150rpm for 10min to obtain protein solution;
b2 mixing polycaprolactone, polyurethane, dimethyl sulfoxide and n-hexane according to the mass ratio of 4:7:20:15, heating to 54 ℃, and stirring at the rotating speed of 100rpm for 20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluoyl peroxybenzoic acid and the bentonite according to the mass ratio of 10:30:3:0.5:14, heating to 50 ℃, stirring for 25min at the rotating speed of 120rpm, centrifuging at the rotating speed of 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at 55 ℃ for 5h to obtain the protein super-elastomer.
The organic titanium is a mixture of isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and isopropyl isostearate titanium complex in a mass ratio of 1.3: 1.
The preparation method of the modified polypropylene comprises the following steps:
uniformly mixing 100 parts by weight of polypropylene, 15 parts by weight of silicon carbide whisker and 5 parts by weight of 3- (trimethylsilyl) propyl acrylate, and then putting the mixture into a double-screw extruder for melt extrusion, wherein the extrusion temperature is 205 ℃, and the screw rotation speed is 150rpm, so as to obtain a polypropylene blend I; adding the polypropylene blend I into 8.5 wt% of tartronic acid aqueous solution according to the solid-to-liquid ratio of 1kg:5L, heating to 75 ℃, stirring at the rotating speed of 500rpm for 45min, filtering, washing with water, and drying in an oven at 50 ℃ for 6h to obtain a polypropylene blend II; and adding the polypropylene blend II into a keratin aqueous solution with the weight percentage of 3.5 according to the solid-to-liquid ratio of 1kg:5L, heating to 37 ℃, stirring at the rotating speed of 300rpm for 150min, filtering, washing with water, and drying in an oven with the temperature of 80 ℃ for 3h to obtain the modified polypropylene. The tear resistance of the tear-resistant antibacterial nonwoven fabric obtained in example 11 was measured by the method of test example 2, and the tear strength was 89.0N. In the preparation of the tear-resistant antibacterial non-woven fabric in example 11, one of the polypropylene components is modified, so that the compatibility between the polypropylene and the other components is improved, and the cross-linking combination between the components is better; the addition of the silicon carbide whiskers strengthens the interface structure of the polypropylene, and has better toughness and strength; in addition, keratin is anchored on polypropylene molecules, so that the hydrophilicity of the polypropylene is improved, and the moisture absorption and air permeability are better.
Test example 1
And (3) antibacterial testing: according to GB/T20944.1-2007 evaluation part 1 of antibacterial properties of textiles: the agar plate diffusion method tests the antibacterial property of the tear-resistant antibacterial nonwoven fabric obtained by each example of the present invention.
Staphylococcus aureus (ATCC6538) and Escherichia coli (ATCC11229) were used as test strains; preparing the tear-resistant antibacterial non-woven fabric obtained in each embodiment of the invention into a circular test sample with the diameter of 25 mm; each group of samples was incubated for 24 hours at 37 ℃ and 85% relative humidity. In this test, the width of the antibacterial tape was used as a measure of the antibacterial performance of the tear-resistant antibacterial nonwoven fabric. In each case 5 different samples were tested and the results averaged over the 5 samples.
TABLE 1 antimicrobial Properties of tear-resistant antimicrobial nonwoven Fabric
According to the invention, the isopropyl tri (dioctyl pyrophosphoryl oxy) titanate and the titanium isostearate complex are compounded to serve as an organic titanium source of the protein super elastomer, and the existence of the titanium element can enable the non-woven fabric to obtain an antibacterial effect, which is related to the photocatalytic capacity of the titanium element. The equivalent negative charge center formed by a plurality of oxygen atoms in the m-toluoyl peroxybenzoic acid can effectively interfere the normal physiological activities of pathogenic bacteria through the charge effect, inhibit the propagation and growth of the pathogenic bacteria, and further achieve the antibacterial effect.
Test example 2
Tear resistance test: reference GB/T3917.2-2009 section 2 tear Performance for textile fabrics: determination of tear Strength of trouser test specimens (Single slit), the tear resistance of the tear-resistant antibacterial nonwoven fabric obtained from each example of the present invention was tested.
The stretching speed is 100 mm/min; the gauge length can be set to 100 mm; the effective width of the clamp is 75 mm; the tear-resistant antibacterial non-woven fabric obtained in each example of the invention is made into strip-shaped test samples with the length of 200mm and the width of 50mm, each test sample is cut from the center of the width direction to form a tear with the length of 100mm parallel to the length direction, and a tear endpoint is marked at the position 25mm away from the uncut end in the middle of the test sample. In each case 5 different samples were tested and the results averaged over the 5 samples.
TABLE 2 tear resistance of tear resistant antimicrobial nonwoven fabrics
The keratin peptide chain is distributed in multiple structural domains, wherein the polypeptide chain can be divided into a rod-shaped middle region and a terminal peptide region with high retention, the peptide chain of the rod-shaped structural domain has a periodic sequence structure of 8 peptide repeats, the intermediate fibrillar eggs have similar peptide chain structures, the keratin peptide chain is a typical alpha helix, an allogenic complex helix formed by combining acidic and basic keratin peptide chains is a characteristic conformation form of the keratin, and the unique conformation enables the keratin to have higher elasticity and toughness.
However, if keratin is directly put into a polypropylene system, the keratin and the polypropylene system have large polarity difference on the molecular structures, and the compatibility of the keratin and the polypropylene system is poor, so that the prepared product is easy to generate the phenomena of cracking, cracking and the like caused by internal stress in the service process. The present invention therefore aims to treat keratin by the specific process described and to apply it to a process for the production of high-strength nonwovens. The zinc lactate can influence the alpha spiral unfolding angle of the keratin in the dimethyl sulfoxide due to the unique optical rotation of the zinc lactate, namely the keratin dissolved in the dimethyl sulfoxide and doped with the zinc lactate can be more fully compatible and entangled with polycaprolactone and polyurethane in the subsequent treatment process, so that the protein superelastic body has a high-elasticity micro molecular structure and good mechanical fatigue resistance. Polycaprolactone is very soft in texture, has extremely high extensibility and low-temperature impact, has good biocompatibility, and has good compatibility with a non-woven fabric substrate, namely polypropylene, so that the mechanical strength and fatigue resistance of the non-woven fabric taking polypropylene as a base material can be improved by combining polycaprolactone with keratin, and the polycaprolactone is very suitable for being used in the biological application fields of medicine and the like. The polyurethane has good chemical resistance and rebound resilience, easy processing, low water absorption, low temperature resistance, aging resistance, high hardness and elasticity. However, if the polyurethane is directly and separately added into a polypropylene system, the inherent polarity difference exists in the molecular structures of the polyurethane and the polypropylene system, so that the compatibility of the polyurethane and the polypropylene system is poor, and the product is easy to crack, break and other damage phenomena in the service process; however, the coordination between the polyurethane and polypropylene systems can be enhanced by the keratin coupling effect, so that the rigidity of the whole material is enhanced, wherein the tearing strength of the non-woven fabric is increased. In addition, titanate with phosphoryloxy groups and titanium isostearate complex with an isostearic acid structure can enhance the crosslinking degree among all components in the protein super elastomer, and bring remarkable improvement to the overall elastic modulus and rigidity of the protein super elastomer. That is, the two organic titanium materials used in the specific method of the present invention not only enhance the antibacterial properties of the obtained protein superelastic body and the antibacterial non-woven fabric, but also enhance the mechanical strength of the two materials, which benefits from the electronic energy state of titanium atoms to enable the arrangement of surrounding atoms to be tighter, and enable the material structure to be tighter, thereby obtaining unexpected technical effects. According to the invention, dimethyl sulfoxide and n-hexane are used as compound solvents, so that the roll-off condition of a keratin peptide chain can be improved, and the combination of keratin, polycaprolactone and polyurethane is facilitated, which is benefited by the nonpolar strength and molecular weight of molecules of the two solvents.
Claims (5)
1. A preparation method of a tear-resistant antibacterial non-woven fabric is characterized by comprising the following steps:
(1) co-melting: putting 45-60 parts of polypropylene or modified polypropylene, 15-30 parts of protein superelastomer, 5-13 parts of succinoglycan, 6-9 parts of dicetyl stearyl alcohol dilinoleate, 1-4 parts of ceteth-2 and 0.3-1.2 parts of zinc stearate into a double-screw extruder, and treating for 30-40min under the conditions that the temperature is 240-250 ℃ and the screw rotation speed is 100-110rpm to obtain a molten body A1;
(2) spinning: extruding the melt A1 into filaments at 165-170 ℃ through a spinneret plate under the working pressure of 7-8MPa to obtain spinning A2;
(3) and (3) filament blowing: cooling the spun yarn A2 by using an air blowing box, wherein the temperature of cold air in the air blowing box is 5-12 ℃, and the air speed is 13-16m/s, so as to obtain a blown yarn A3;
(4) lapping: pressing and molding the blown yarns A3 by a hot-pressing roller at the working temperature of 70-75 ℃ to obtain a curtain web A4;
(5) consolidation: and fixing and molding the curtain web A4 at the temperature of 115-120 ℃ and under the pressure of 11-12MPa to obtain the tear-resistant antibacterial non-woven fabric.
2. The method for preparing the tear-resistant and antibacterial non-woven fabric according to claim 1, wherein the modified polypropylene is prepared by the following method:
uniformly mixing 80-100 parts by weight of polypropylene, 10-15 parts by weight of silicon carbide whisker and 3-5 parts by weight of 3- (trimethylsilyl) propyl acrylate, and then putting the mixture into a double-screw extruder for melt extrusion, wherein the extrusion temperature is 190-210 ℃, and the screw rotation speed is 100-200rpm, so as to obtain a polypropylene blend I; adding the polypropylene blend I into 6-10 wt% of tartronic acid aqueous solution according to the solid-to-liquid ratio of 1kg (5-8) L, heating to 70-80 ℃, stirring at the rotating speed of 500-800rpm for 30-50min, filtering, washing with water, and drying in an oven at 50-60 ℃ for 5-8h to obtain a polypropylene blend II; adding the polypropylene blend II into a keratin aqueous solution with the weight percentage of 1kg (5-8) L to be heated to 35-40 ℃ and stirred at the rotating speed of 300-500rpm for 120-180min, filtering, washing, and drying in an oven with the temperature of 60-80 ℃ for 3-5h to obtain the modified polypropylene.
3. The method for preparing a tear-resistant and antibacterial nonwoven fabric according to claim 1, wherein the protein superelastic body is prepared by the following method:
b1 dissolving keratin in dimethyl sulfoxide at 22-27 deg.C at bath ratio of (2.5-4) g (85-110) mL, stirring at 130-150rpm for 3-6min, adding zinc lactate 0.28-0.64% of the weight of the keratin, and stirring at 130-150rpm for 10-15min to obtain protein solution;
b2 mixing polycaprolactone, polyurethane, dimethyl sulfoxide and n-hexane according to the mass ratio of (3.5-5): 6.4-8.9): 18-22.8): 13-16.5, heating to 52-55 ℃, and stirring at the rotating speed of 80-100rpm for 16-20min to obtain ester liquid;
b3 mixing the protein liquid, the ester liquid, the organic titanium, the m-toluyl peroxybenzoic acid and the bentonite according to the mass ratio of (8-10): (27-32): (2-3.2): (0.4-0.6): (12.3-15.6), heating to 48-52 ℃, stirring at the rotating speed of 100 plus 120rpm for 22-25min, centrifuging at the rotating speed of 9000 plus 10000rpm to remove the redundant liquid phase, and drying the obtained solid in an oven at the temperature of 53-55 ℃ for 4-7h to obtain the protein superelastomer.
4. The method for preparing the tear-resistant antibacterial non-woven fabric according to claim 3, wherein the organic titanium is one or a mixture of two of isopropyl tri (dioctyl pyrophosphato) titanate and isopropyl isostearate titanium complex.
5. A tear-resistant antibacterial non-woven fabric is characterized in that: prepared by the method of any one of claims 1-4.
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| CN108774759A (en) * | 2018-05-24 | 2018-11-09 | 江阴市华思诚无纺布有限公司 | A kind of antibacterial polyester non-woven fabrics and preparation method thereof |
| CN110272593A (en) * | 2019-07-06 | 2019-09-24 | 浙江合塑控股有限公司 | A kind of preparation method of high-intensitive cold-resistant PP-R composite material |
| CN113668142A (en) * | 2021-09-29 | 2021-11-19 | 河南迪怡疗护科技开发有限公司 | Medical and sanitary antibacterial non-woven fabric and production method thereof |
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| CN107938171A (en) * | 2017-12-25 | 2018-04-20 | 安徽省临泉县万隆塑料包装有限公司 | A kind of elastic composite nonwoven fabric and its production technology |
| CN108774759A (en) * | 2018-05-24 | 2018-11-09 | 江阴市华思诚无纺布有限公司 | A kind of antibacterial polyester non-woven fabrics and preparation method thereof |
| CN110272593A (en) * | 2019-07-06 | 2019-09-24 | 浙江合塑控股有限公司 | A kind of preparation method of high-intensitive cold-resistant PP-R composite material |
| CN113668142A (en) * | 2021-09-29 | 2021-11-19 | 河南迪怡疗护科技开发有限公司 | Medical and sanitary antibacterial non-woven fabric and production method thereof |
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Denomination of invention: A tear resistant and antibacterial non-woven fabric and its preparation method Effective date of registration: 20230821 Granted publication date: 20221122 Pledgee: Postal Savings Bank of China Co.,Ltd. Yangzhou Branch Pledgor: JIANGSU AOTELONG NEW MATERIAL Co.,Ltd. Registration number: Y2023980052957 |