CN107904676B - Double-component reaction curing type solvent-free electrospinning device - Google Patents
Double-component reaction curing type solvent-free electrospinning device Download PDFInfo
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- CN107904676B CN107904676B CN201711269944.9A CN201711269944A CN107904676B CN 107904676 B CN107904676 B CN 107904676B CN 201711269944 A CN201711269944 A CN 201711269944A CN 107904676 B CN107904676 B CN 107904676B
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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
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
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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
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
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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
- D01D5/0092—Electro-spinning characterised by the electro-spinning apparatus characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields
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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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
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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
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/10—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent
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- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention discloses a two-component reaction curing type solvent-free electrospinning device which comprises a liquid storage needle tube, wherein the liquid storage needle tube comprises a needle tube shell, a liquid pushing mechanism and a liquid outlet nozzle, an inner cavity of the needle tube shell is divided into a left solution cavity and a right solution cavity by a vertically arranged partition plate, the bottoms of the solution cavities are respectively provided with a liquid outlet, the liquid outlets are communicated with the liquid outlet nozzle, the liquid outlet nozzle is sleeved with an upper port of a reactor, a lower port of the reactor is sleeved with an upper port of a metal needle head, the metal needle head is electrically connected with a positive electrode of a high-voltage power supply, a negative electrode of the high-voltage power supply is electrically connected with a collector, the liquid pushing mechanism comprises pistons respectively arranged in the two solution cavities, push rods are respectively arranged at the upper ends of the pistons, and push handles are. The device can be used for electrospinning micro-nanofibers from a two-component spinning precursor liquid mixed reaction curing material, is simple to use, has low requirements on experimental conditions, has a solvent utilization rate of more than 90%, and has a good application prospect.
Description
Technical Field
The invention belongs to the technical field of nano material preparation, and particularly relates to a double-component reaction curing type solvent-free electrospinning device.
Background
The electrostatic spinning technology is a simple and effective method for preparing uniform and continuous one-dimensional micro-nano fibers. At present, hundreds of polymers are prepared into micro-nanofibers by an electrostatic spinning technology. However, most of the preparation of these electrospun fibers comes from solution electrospinning, i.e. the solution of polymer is stretched in a high-voltage electrostatic field, and the final solvent is volatilized to form fibers. The electrospun fiber prepared by solution electrospinning has the advantages of fine diameter, good continuity and controllable morphology. However, the preparation of spinning solutions generally requires the use of large amounts of organic solvents, which account for more than 80% of the total solution, and which are all volatilized during electrospinning and do not participate in fiber formation. The volatile organic solvent will cause serious pollution to the surrounding environment if not recovered. Therefore, the problem of recovering the organic solvent is one of the key factors for restricting the industrialization of the solution electrostatic spinning. In order to avoid the problem of solvent volatilization, the solvent-free electrospinning technology becomes a new choice. At present, the main stream of solvent-free electrospinning is melt electrospinning, and the method does not use a solvent at all and has no problem of solvent volatilization. However, the polymer needs to be heated to form a melt in the electrospinning process, the heating device is complicated, and the electric heating is easy to generate electromagnetic interference with a high-voltage power supply, which affects the smooth spinning. Therefore, an easily realized device for preparing micro-nano fibers by solvent-free electrostatic spinning is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the device can be used for oxidizing and reducing the two-component spinning precursor liquid mixed reaction curing material to electrically spin micro-nanofibers, the application field of the solvent-free electrospinning is expanded, the device is simple to use, the requirement on experimental conditions is low, the utilization rate of the solvent reaches more than 90%, and the device has a good application prospect.
In order to solve the problems, the invention provides a two-component reaction curing type solvent-free electrospinning device, which comprises a liquid storage needle tube, wherein the liquid storage needle tube comprises a needle tube shell, a liquid pushing mechanism and a liquid outlet nozzle, the inner cavity of the needle tube shell is divided into a left solution cavity and a right solution cavity by a vertically arranged partition plate, the bottoms of the solution cavities are respectively provided with a liquid outlet, the liquid outlets are communicated with the solution cavities and the liquid outlet nozzle arranged at the bottom of the needle tube shell, the liquid outlet nozzle is sleeved with the upper port of a reactor, the reactor can promote the liquid mixing reaction flowing out of the two liquid outlets, the lower port of the reactor is sleeved with the upper port of a metal needle head, the metal needle head is electrically connected with the anode of a high-voltage power supply through a lead, the cathode of the high-voltage power supply is electrically connected with the collector of the electrospinning device through a lead, the collector is arranged right below, the liquid pushing mechanism comprises pistons which are respectively arranged in the two solution cavities, a rubber sleeve is sleeved on the outer surface of each piston, push rods are respectively arranged at the upper ends of the two pistons, a pushing handle is respectively arranged at the upper ends of the two push rods, and the pushing handles are connected with a driving mechanism for pushing the liquid pushing mechanism.
The electrospinning device is suitable for preparing special electrospinning micro-nanofibers made of special materials solidified by special two-component solution mixed reaction. The special electrospinning system requires two different components of spinning precursor solution: a spinning precursor solution of an oxidizing component and a spinning precursor solution of a reducing component. The spinning precursor solution for preparing the two components comprises vinyl active monomers and toughening resin, wherein the vinyl active monomers are one or more of vinyl monomers with boiling points of above 150 degrees, such as isobornyl methacrylate, methacrylic acid, octyl acrylate, acrylamide and the like; the toughening resin is one or more of nitrile-butadiene rubber, poly (methyl) acrylate, ABS resin, TPU resin and the like. Wherein the spinning precursor solution of the oxidizing component contains an oxidizing component (mainly peroxides such as hydroxyl peroxide (t-butyl hydroperoxide, CHP), diacyl peroxide (dibenzoyl peroxide, BPO), ketone peroxide, etc.), and the spinning precursor solution of the reducing component contains a reducing component (mainly substituted thiourea, tertiary amine, cobalt (manganese) naphthenate, etc.). After the two-component spinning precursor solution is mixed in a reactor of an electrospinning device, oxidation-reduction reaction is carried out to generate free radicals, so that the active monomer is initiated to be rapidly polymerized and solidified at room temperature. Spinning precursor liquid of an oxidation component and spinning precursor liquid of a reduction component are respectively placed in two solution cavities of a liquid storage needle tube, the spinning precursor liquid in the two solution cavities enters a reactor from a liquid outlet under the pushing action of a liquid pushing mechanism, the spinning precursor liquid of the two components is mixed in the reactor to carry out pre-reaction, then the spinning precursor liquid enters a metal needle head, liquid drops are formed at the lower port of the metal needle head, after a high-voltage power supply is started, the liquid drops at the lower port of the metal needle head are stretched and split under the action of an electric field force, and the spinning precursor liquid of the two components continues to react and solidify to form the micro-nano fiber in the stretching process.
Preferably, the lateral wall of drain nozzle on be provided with and keep off the ring, keep off ring lower surface mounting and have the sealing washer, keep off and be provided with the external screw thread on the drain nozzle lateral wall of ring below, the reactor include the go-between, the inside wall of go-between on be provided with the internal thread, drain nozzle and reactor are connected through internal thread and external screw thread, the go-between connect the reaction tube through the reducing joint, the heavy-calibre port that the reducing connects is connected to the lower port of go-between, the last port of the small-calibre port connection reaction tube that the reducing connects, the reaction tube under the port cup joint metal syringe needle.
Preferably, the reaction tube is internally provided with a helical blade, and the helical blade is arranged on the inner side wall of the reaction tube. The spiral blades are arranged in the reaction tube, so that the mixing effect of the two-component spinning precursor liquid can be improved, the pre-reaction effect is enhanced, and the fiber forming effect is improved.
Preferably, the driving mechanism for pushing the liquid pushing mechanism is a micro-injection pump, the liquid storage needle tube is fixed on the micro-injection pump through a fixing clamp of the micro-injection pump, and a pushing handle of the liquid pushing mechanism is connected with a pushing plate of a pushing rod of the micro-injection pump.
Preferably, the push handles at the upper ends of the two push rods are connected into a whole, the micro-injection pump is a single-push-rod micro-injection pump, and the push plate of the push rod of the micro-injection pump is connected with the push handle.
Preferably, the micro-injection pump is a double-channel micro-injection pump with two pushing rods, and the pushing plates of the two pushing rods are respectively connected with a pushing handle.
Preferably, the voltage range of the high-voltage power supply is continuously adjustable within 0-30 kV.
Preferably, the propelling speed of the micro-injection pump is continuously adjustable within the range of 0.001 mu L/min to 127 mL/min.
Preferably, the metal needle is a stainless steel needle, the inner diameter of the metal needle is 0.5-3mm, the collecting electrode is one of aluminum foil, a metal plate or a stainless steel net, the distance between the lower port of the metal needle and the collecting electrode is 15-20cm, the capacity of the solution cavity is 50ml, the capacity of the reaction tube is 10-200ml, and the length of the reaction tube is 3-10 cm.
Preferably, the needle tube shell, the partition plate, the pushing handle of the liquid pushing mechanism, the push rod (4), the piston and the liquid outlet nozzle of the liquid storage needle tube are all of PVC plastic structures; the reaction tube of the reactor is a polypropylene tube.
The invention has the beneficial effects that: the invention provides a two-component reaction curing type solvent-free electrospinning device which can be used for oxidizing and reducing a two-component spinning precursor liquid mixed reaction curing material to electrospinning micro-nanofibers, the application field of solvent-free electrospinning is expanded, the device is simple in use method, low in requirement on experimental conditions, and the utilization rate of raw materials reaches more than 90%. Specifically, the method comprises the following steps:
(1) the electrospinning device is applied to the electrostatic spinning of the oxidation and reduction two-component spinning precursor liquid to prepare the micro-nanofiber, extra additional devices such as heating and heat insulation are not needed, and storage and mixing reaction of the two-component spinning precursor liquid can be met only by matching a liquid storage needle tube with a reactor.
(2) The oxidation and reduction double-component spinning precursor solution is pre-reacted in a reactor, and then is further reacted in the electrospinning process, so that the fiber is formed through solidification. In the process, no or only a small amount of solvent is volatilized, most of the solvent participates in solidification to form fibers, the utilization rate of raw materials is effectively improved, and the solvent-free electrospinning device belongs to solvent-free electrospinning.
Drawings
FIG. 1: is a schematic view of the electrospinning apparatus of example 1;
FIG. 2: is a structural schematic diagram of a liquid storage needle tube of the electrospinning device of the embodiment 1;
FIG. 3: is an enlarged view of the structure of part A of FIG. 2;
FIG. 4: is a bottom view of the liquid pushing mechanism of the electrospinning device of embodiment 1;
FIG. 5: is a schematic structural view of a reactor of the electrospinning apparatus of example 1;
FIG. 6: a schematic structural diagram of a liquid storage needle tube of the electrospinning device of example 4;
FIG. 7: an electron microscope photograph of the polymer micro-nanofiber prepared in example 2;
FIG. 8: an electron microscope photograph of the polymer micro-nanofiber prepared in example 3;
FIG. 9: an electron microscope photograph of the polymer micro-nanofiber prepared in example 4.
In the figure: 1-micro-injection pump, 2-push plate, 3-push handle, 4-push rod, 5-liquid storage needle tube, 6-fixing clip, 7-needle tube shell, 8-liquid outlet nozzle, 9-reactor, 10-connecting ring, 11-reducing joint, 12-reaction tube, 13-metal needle, 14-conducting wire, 15-high voltage power supply, 16-collector, 17-piston, 18-rubber sleeve, 19-clapboard, 20-solution cavity, 21-liquid outlet, 22-baffle ring, 23-external thread, 24-helical blade, 25-internal thread and 26-sealing ring.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the following explains the present solution by way of embodiments.
Example 1
As shown in fig. 1 to 5, a two-component reaction solidification type solvent-free electrospinning device comprises a liquid storage needle tube 5, wherein the liquid storage needle tube 5 comprises a needle tube housing 7, a liquid pushing mechanism and a liquid outlet nozzle 8, an internal cavity of the needle tube housing 7 is divided into a left solution cavity 20 and a right solution cavity 20 by a vertically arranged partition plate 19, the bottoms of the solution cavities 20 are respectively provided with a liquid outlet 21, the liquid outlet 21 is communicated with the solution cavity 20 and the liquid outlet nozzle 8 arranged at the bottom of the needle tube housing 7, the liquid outlet nozzle 8 is sleeved with an upper port of a reactor 9, the reactor 9 can promote a liquid mixing reaction flowing out from the two liquid outlet 21, a lower port of the reactor 9 is sleeved with an upper port of a metal needle 13, the metal needle 13 is electrically connected with an anode of a high voltage power supply 15 through a lead 14, a cathode of the high voltage power supply 15 is electrically connected with a collector 16 of the electrospinning device, the collector 16 is arranged under the lower end opening of the metal needle 13, the liquid pushing mechanism comprises pistons 17 which are respectively arranged in two solution cavities 20, a rubber sleeve 18 is sleeved on the outer surface of each piston 17, push rods 4 are arranged at the upper ends of the pistons 17, a push handle 3 is arranged at the upper ends of the two push rods 4, and the push handle 3 is connected with a driving mechanism for pushing the liquid pushing mechanism. The lateral wall of drain nozzle 8 on be provided with and keep off ring 22, keep off ring 22 lower surface mounting and have sealing washer 26, keep off and be provided with external screw thread 23 on the 8 lateral walls of drain nozzle of ring 22 below, reactor 9 include go-between 10, the inside wall of go-between 10 on be provided with internal thread 25, drain nozzle 8 and reactor 9 are connected through internal thread 25 and external screw thread 23, go-between 10 connect reaction tube 12 through reducing joint 11, the heavy-calibre port that reducing joint 11 was connected to the lower port of go-between 10, the last port of reaction tube 12 is connected to the small-bore port that reducing joint 11, reaction tube 12 lower port cup joint metal needle. The reaction tube 12 is internally provided with a helical blade 24, and the helical blade 24 is arranged on the inner side wall of the reaction tube 12. The driving mechanism for pushing the liquid pushing mechanism is a micro-injection pump 1, the liquid storage needle tube 5 is fixed on the micro-injection pump 1 through a fixing clamp 6 of the micro-injection pump 1, and a pushing handle 3 of the liquid pushing mechanism is connected with a pushing plate 2 of a pushing rod of the micro-injection pump 1. The micro-injection pump 1 is a double-channel micro-injection pump with two pushing rods, and pushing plates 2 of the two pushing rods are respectively connected with a pushing handle 3. The voltage range of the high-voltage power supply 15 is 0-30kV and is continuously adjustable. The propelling speed of the micro-injection pump 1 is continuously adjustable within the range of 0.001 mu L/min to 127 mL/min. The metal needle 13 is a stainless steel needle with an inner diameter of 1mm, the collector 16 is aluminum foil, and the distance between the lower port of the metal needle 13 and the collector is 15-20cm and is continuously adjustable. The needle tube shell 7 of the liquid storage needle tube 5, the partition plate 19, the pushing handle 3 of the liquid pushing mechanism, the push rod 4, the piston 17 and the liquid outlet nozzle 8 are all of PVC plastic structures; the reaction tube 12 of the reactor 9 is a polypropylene tube. The capacity of the solution cavity 20 is 50ml, the capacity of the reaction tube 12 is 10ml, and the length is 7 cm.
Example 2
The preparation of the micro-nanofiber by using the two-component reaction curing type solvent-free electrospinning device of example 1 comprises the following steps:
(1) preparing a spinning precursor solution: sequentially adding 50 parts of octyl acrylate, 15 parts of ethylene glycol dimethacrylate, 10 parts of methacrylic acid, 0.02 part of hydroquinone, 0.02 part of 264-antioxidant and 3 parts of ethylene glycol into a reaction kettle, and stirring for about 0.5 hour; adding 15 parts of ABS resin and 3 parts of cumene hydroperoxide, and continuously stirring for about 2 hours to obtain a component A spinning precursor solution; adding 52 parts of octyl acrylate, 8 parts of ethylene glycol dimethacrylate, 10 parts of methacrylic acid and 0.01 part of hydroquinone into another reaction kettle in sequence, and stirring for about 0.5 hour; adding 15 parts of nitrile rubber and 8 parts of tetramethyl thiourea, and continuously stirring for about 2 hours to obtain a B-component spinning precursor solution (the raw materials are in parts by mass);
(2) electrospinning micro-nano fibers: the spinning precursor solution of the component a and the spinning precursor solution of the component B prepared in the step (1) are respectively injected into the two solution chambers 20 of the electrospinning device of the embodiment 1. Adjusting the distance between the lower port of the metal needle 13 and the collector 16 to be 18 cm, turning on the high-voltage power supply 15, setting the spinning voltage to be 20kV, turning on the power supply of the micro-injection pump 1, setting the advancing rate of the pushing rod for controlling the liquid outlet rate of the solution cavity of the A-component spinning precursor solution to be 20 microliter/min, and setting the advancing rate of the pushing rod for controlling the liquid outlet rate of the solution cavity of the B-component spinning precursor solution to be 25 microliter/min, and performing electrostatic spinning. After 10 minutes, the solidified micro-nanofibers are collected on the collector 16, and the observation result of the obtained micro-nanofibers under SEM is shown in fig. 7.
Example 3
The preparation of the micro-nanofiber by using the two-component reaction curing type solvent-free electrospinning device of example 1 comprises the following steps:
(1) preparing a spinning precursor solution: sequentially adding 50 parts of isobornyl methacrylate, 15 parts of ethylene glycol dimethacrylate, 10 parts of methacrylic acid, 0.02 part of hydroquinone, 0.02 part of 264-antioxidant and 3 parts of ethylene glycol into a reaction kettle, and stirring for about 0.5 hour; adding 15 parts of nitrile rubber and 3 parts of cumene hydroperoxide, and continuously stirring for about 2 hours to obtain a component A spinning precursor solution; sequentially adding 52 parts of isobornyl methacrylate, 8 parts of ethylene glycol dimethacrylate, 10 parts of methacrylic acid and 0.01 part of hydroquinone into another reaction kettle, and stirring for about 0.5 hour; adding 15 parts of nitrile butadiene rubber and 8 parts of N, N-dimethylaniline, and continuously stirring for about 2 hours to obtain a spinning precursor solution with a component B (the raw materials are in parts by mass);
(2) electrospinning micro-nano fibers: the spinning precursor solution of the component a and the spinning precursor solution of the component B prepared in the step (1) are respectively injected into the two solution chambers 20 of the electrospinning device of the embodiment 1. Adjusting the distance between the lower port of the metal needle 13 and the collector 16 to be 20cm, turning on the high-voltage power supply 15, setting the spinning voltage to be 25kV, turning on the power supply of the micro-injection pump 1, setting the advancing rate of the pushing rod for controlling the liquid outlet rate of the solution cavity of the A-component spinning precursor solution to be 20 microliter/min, and setting the advancing rate of the pushing rod for controlling the liquid outlet rate of the solution cavity of the B-component spinning precursor solution to be 30 microliter/min, and performing electrostatic spinning. After 10 minutes, the solidified micro-nanofibers are collected on the collector 16, and the observation result of the obtained micro-nanofibers under SEM is shown in fig. 8.
Example 4
Example 4 a two-component reaction-solidified solvent-free electrospinning apparatus similar to that of example 1 was used, except that: the push handles 3 at the upper ends of the two push rods 4 are connected into a whole (as shown in fig. 6), the micro-injection pump 1 is a single-push-rod micro-injection pump, and the push plate 2 of the push rod of the micro-injection pump 1 is connected with the push handle 3.
The method for preparing the micro-nano fiber by using the device of the embodiment 4 comprises the following steps:
(1) preparing a spinning precursor solution: sequentially adding 50 parts of isobornyl methacrylate, 15 parts of ethylene glycol dimethacrylate, 10 parts of methacrylic acid, 0.02 part of hydroquinone, 0.02 part of 264-antioxidant and 3 parts of ethylene glycol into a reaction kettle, stirring for about 0.5 hour, adding 15 parts of nitrile rubber and 3 parts of cumene hydroperoxide, and continuously stirring for about 2 hours to obtain a component A spinning precursor solution; sequentially adding 52 parts of isobornyl methacrylate, 8 parts of ethylene glycol dimethacrylate, 10 parts of methacrylic acid and 0.01 part of hydroquinone into another reaction kettle, stirring for about 0.5 hour, adding 15 parts of nitrile rubber and 8 parts of methylthiourea, and continuously stirring for about 2 hours to obtain a spinning precursor solution B (the raw materials are in parts by mass);
(2) electrospinning micro-nano fibers: the spinning precursor solution of the component a and the spinning precursor solution of the component B prepared in the step (1) are respectively injected into the two solution chambers 20 of the electrospinning device of the embodiment 1. Adjusting the distance between the lower port of the metal needle 13 and the collector 16 to be 15 cm, turning on the high-voltage power supply 15, setting the spinning voltage to be 15kV, turning on the power supply of the micro-injection pump 1, setting the propelling speed of the propelling rod to be 20 microlitre/min, and carrying out electrostatic spinning. After 10 minutes, the solidified micro-nanofibers are collected on the collector 16, and the observation result of the obtained micro-nanofibers under SEM is shown in fig. 9.
The above-mentioned embodiments are only for understanding the present invention, and are not intended to limit the technical solutions of the present invention, and those skilled in the art can make various changes or modifications based on the technical solutions described in the claims, and all equivalent changes or modifications should be covered by the scope of the claims of the present invention. The present invention is not described in detail, but is known to those skilled in the art.
Claims (10)
1. The utility model provides a two ingredient reaction solidification formula solventless electrospinning device, its characterized in that includes stock solution needle tubing (5), stock solution needle tubing (5) include needle tubing shell (7), liquid pushing mechanism and liquid outlet (8), the inside cavity of needle tubing shell (7) is divided into two left and right solution chamber (20) by vertical baffle (19) that sets up, solution chamber (20) bottom all be provided with liquid outlet (21), liquid outlet (21) intercommunication solution chamber (20) with set up in liquid outlet (8) of needle tubing shell (7) bottom, liquid outlet (8) cup joint with the last port of reactor (9), reactor (9) can promote the liquid mixing reaction that two liquid outlets (21) flow out, the lower port of reactor (9) cup joint with the last port of metal syringe needle (13), metal syringe needle (13) pass through wire (14) electricity connect the positive pole of high voltage power supply (15), the negative pole of high voltage power supply (15) pass through wire (14) electricity and connect collector (16) of electro-spinning device, collector (16) set up under the lower port of metal syringe needle (13), liquid pushing mechanism including arranging piston (17) in two solution chambeies (20) respectively in, the surface cover of piston (17) has rubber sleeve (18), two push rod (4) are all installed to the upper end of piston (17), push away handle (3) are all installed to the upper end of two push rod (4), push away handle (3) connect the actuating mechanism who promotes liquid pushing mechanism.
2. The two-component reaction solidification type solvent-free electrospinning device according to claim 1, wherein a baffle ring (22) is arranged on the outer side wall of the liquid outlet nozzle (8), a sealing ring (26) is mounted on the lower surface of the baffle ring (22), an external thread (23) is arranged on the outer side wall of the liquid outlet nozzle (8) below the baffle ring (22), the reactor (9) comprises a connecting ring (10), an internal thread (25) is arranged on the inner side wall of the connecting ring (10), the liquid outlet nozzle (8) and the reactor (9) are connected with the external thread (23) through the internal thread (25), the connecting ring (10) is connected with the reaction tube (12) through the reducing joint (11), the lower port of the connecting ring (10) is connected with the large-diameter port of the reducing joint (11), and the small-diameter port of the reducing joint (11) is connected with the upper port of the reaction tube (12), the lower port of the reaction tube (12) is sleeved with a metal needle.
3. The two-component reaction-solidified solvent-free electrospinning device of claim 2, wherein the reaction tube (12) is provided with a spiral blade (24), and the spiral blade (24) is installed on an inner sidewall of the reaction tube (12).
4. The two-component reaction-solidified solvent-free electrospinning device according to claim 1, wherein the driving mechanism for pushing the liquid pushing mechanism is a microinjection pump (1), the liquid storage needle tube (5) is fixed on the microinjection pump (1) through a fixing clip (6) of the microinjection pump (1), and the pushing handle (3) of the liquid pushing mechanism is connected with the pushing plate (2) of the pushing rod of the microinjection pump (1).
5. The two-component reaction-solidified solvent-free electrospinning device according to claim 4, wherein the push handles (3) at the upper ends of the two push rods (4) are connected into a whole, the microinjection pump (1) is a single-push-rod microinjection pump, and the push plate (2) of the push rod of the microinjection pump (1) is connected with the push handle (3).
6. The two-component reaction-solidified solvent-free electrospinning device according to claim 4, wherein the microinjection pump (1) is a double-channel microinjection pump having two push rods, and push plates (2) of the two push rods are respectively connected to a push handle (3).
7. The two-component reaction-solidified solvent-free electrospinning device of claim 1, wherein the voltage of the high voltage power supply (15) is continuously adjustable from 0kV to 30 kV.
8. The two-component reaction-solidified solvent-free electrospinning device of claim 4, wherein the advance rate of the microinjection pump (1) is continuously adjustable from 0.001 μ L/min to 127 mL/min.
9. The two-component reaction-solidified solvent-free electrospinning device of claim 2, wherein the metal needle (13) is a stainless steel needle having an inner diameter of 0.5 to 3mm, the collector (16) is one of an aluminum foil, a metal plate or a stainless steel mesh, a distance between a lower port of the metal needle (13) and the collector is continuously adjustable between 15 to 20cm, the solution chamber (20) has a volume of 50ml, and the reaction tube (12) has a volume of 10 to 200ml and a length of 3 to 10 cm.
10. The two-component reaction-solidified solvent-free electrospinning device of claim 2, wherein the needle tube housing (7) of the liquid storage needle tube (5), the partition plate (19), the push handle (3) of the liquid pushing mechanism, the push rod (4), the piston (17) and the liquid outlet nozzle (8) are all of PVC plastic structures; the reaction tube (12) of the reactor (9) is a polypropylene tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711269944.9A CN107904676B (en) | 2017-12-05 | 2017-12-05 | Double-component reaction curing type solvent-free electrospinning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711269944.9A CN107904676B (en) | 2017-12-05 | 2017-12-05 | Double-component reaction curing type solvent-free electrospinning device |
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