CN105297152A - Continuous twisting device improving strength of nanofiber yarn - Google Patents
Continuous twisting device improving strength of nanofiber yarn Download PDFInfo
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- CN105297152A CN105297152A CN201510599255.9A CN201510599255A CN105297152A CN 105297152 A CN105297152 A CN 105297152A CN 201510599255 A CN201510599255 A CN 201510599255A CN 105297152 A CN105297152 A CN 105297152A
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Abstract
The invention relates to a continuous twisting device improving strength of a nanofiber yarn. The continuous twisting device comprises a nanofiber production device, a nanofiber beam heating processing device and a nanofiber yarn twisting rolling device, wherein the nanofiber production device produces nanofiber beams; the nanofiber beam heating processing device can heat and process the produced nanofiber beams; the nanofiber yarn twisting rolling device consists of a twisting disc and a rolling roller; the rolling roller is fixed on the twisting disc via a reinforcing rib; an axis of the rolling roller is perpendicular to an axis of the twisting disc; the rolling roller can rotate surrounding the axis of the rolling roller via a first motor; the twisting device can rotate surrounding the axis of the twisting disc via a second motor; and the nanofiber beams can wind the rolling roller after heated and processed by the nanofiber beam heating and processing device. Nanofiber yarn twisting and rolling can be effectively conducted via the continuous twisting device, so mechanical property of the nanofiber yarns can be improved.
Description
Technical field
The present invention relates to electrostatic spinning technique field, particularly relating to a kind of continuous twisting apparatus for improving nano-fibre yams brute force.
Background technology
Nanofiber is the study hotspot in current nanometer material science field.Nanofiber has excellent characteristic, as small-size effect, surface and interface effect, quantum size effect and quantum tunneling effect, so its goods are widely used in fields such as biologic applications, filtration, tissue engineering bracket, reinforced composite, protective materialss.
1934, first U.S. Folmas disclosed the patent adopting electrostatic spinning technique to prepare nanofiber.After this, utilizing electrostatic spinning technique to produce nanofiber becomes main method, and electrostatic spinning apparatus and nanofiber preparation method have also become the important topic of numerous research worker's research.
Electrostatic spinning is the fiber making polymer solution or melt be drawn into nanoscale under electric field force.Micro-injection pump connects spinning syringe needle, control the flow of polymer solution or melt, spinning syringe needle connects the positive pole of HV generator, make the high-pressure electrostatic of several kilovolts of volts even up to ten thousand on polymer solution or melt band, be gathering-device apart from spinning syringe needle a distance, gathering-device ground connection, so just form high voltage electric field between spinning syringe needle and gathering-device.Polymer solution or melt to be stretched refinement because electric field force that solution surface charge effect produces overcomes effect such as its surface tension, viscosity resistance etc., and solvent evaporates finally forms nanofibres deposit on gathering-device.
Electrostatic spinning technique becomes the effective method of the one preparing nanofiber, but current obtained nanofiber mainly rambling fibrofelt, because its degree of orientation is poor, intensity is low, its application is very limited, and prepares the high bundles of nanofibers of the degree of orientation or bundles of nanofibers is twisted the study hotspot that resultant yarn becomes nanofiber science.At traditional field of textiles, become yarn by fiber collection, then have yarn to make textiles, greatly can expand its application.Equally, obtain nano-fibre yams and just can prepare nano-fabric, expand its application in functional textile field further.But, with regard to current research, for the rarely seen report of preparation of bundles of nanofibers and nano-fibre yams.
DeitzelJM [DeitzelJM, Polymer, 2001,42,8163-8170] added a series of metal in high voltage electric field region and be biased ring, make Electric Field Distribution evenly, thus reach the sedimentation state of control nanofiber on gathering-device, can obtain the bundles of nanofibers aligned, but not to bundles of nanofibers twisting, brute force is lower.TeoWE [TeoWE, Nanotechnology, 2005,16,1878-1884] utilizes the steel disc kept at a certain distance away to collect the nanofiber tow of orientation, is that brute force is lower not to bundles of nanofibers twisting equally.It is that the surface utilizing Static Spinning nanofiber to be sprayed onto water receiver forms nanowebs, then by nanowebs withdrawing nanofibers bundle that SmitE [SmitE, Polymer, 2005,46,2419-2423] designs immersion method resultant yarn gathering-device.This method shortcoming be that nanofiber output is little, the drawing-off nanofibers bundle degree of orientation is poor, and can only be suitable for water-fast polymer solution spinning.Chinese patent ZL201320084010.9 discloses a kind of nano electrostatic device for spinning of novel bipolar electrode symmetry, be axially have removable hollow metallic rod at rosette with other device differences, nanofiber ejects from metal needle and easily forms oriented nanofibers bundle first watch at metal dish and hollow metallic rod conical points, can form continuity nano-fibre yams, but institute obtains the nano-fibre yams twist and brute force is all lower.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of continuous twisting apparatus for improving nano-fibre yams brute force, effectively can carry out twisting and the winding of nano-fibre yams, promotes the mechanical property of nano-fibre yams.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of continuous twisting apparatus for improving nano-fibre yams brute force, comprise nanofiber generation device, bundles of nanofibers heat treatment apparatus and nano-fibre yams twisting winding device, described nanofiber generation device is for generation of bundles of nanofibers; The bundles of nanofibers that described bundles of nanofibers heat treatment apparatus is used for producing carries out heat treated; Described nano-fibre yams twisting winding device comprises twisting plate and take up roll; Described take up roll is fixed on twisting plate by reinforcing bar, and the axis of take up roll is mutually vertical with the axis of twisting plate; Described take up roll can be rotated around the axis of self by the first motor, and described twisting plate can be rotated around the axis of self by the second motor, and the bundles of nanofibers through bundles of nanofibers heat treatment apparatus can be wound up on described take up roll.
Described nanofiber generation device comprises the first spinning syringe needle and the second spinning syringe needle that are oppositely arranged; The axis side of described first spinneret and the second spinneret is provided with the hollow metal cylinder for receiving nanofiber; Described first spinning syringe needle is connected with high-voltage power cathode; Described second spinning syringe needle is connected with high voltage source negative pole; Described hollow metal cylinder ground connection.
Distance between described first spinning syringe needle and the second spinning syringe needle is 10-20cm.
Described first spinning syringe needle and the second spinning syringe needle control spinning solution flow by respective micro-injection pump respectively.
Described hollow metal cylinder is 3-5cm to the distance of the axis of described first spinning syringe needle and the second spinning syringe needle.
The heating temperature range of described bundles of nanofibers heat treatment apparatus is 90-150 DEG C.
The rolling speed of described first motor is 1-5m/min; The rotating speed of described second motor is 100-1000r/min.
Beneficial effect
Owing to have employed above-mentioned technical scheme, the present invention compared with prior art, there is following advantage and good effect: the present invention utilizes electrostatic spinning technique that polymer solution spun is made bundles of nanofibers, and utilize twisting wrap-up to realize the preparation of twisting continuous nano-fibre yarn, the brute force of nano-fibre yams effectively can be improved by heat treatment apparatus, improve the quality of nano-fibre yams, expand its application prospect, utilize this device can realize the preparation of nano-fibre yams to multiple polymers solution, the scale preparation of nano-fibre yams can be realized by increasing multiple shower nozzle simultaneously, increase the output of nano-fibre yams, greatly can expand the application of nano-fibre yams at functional textile Material Field.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the Electronic Speculum figure of obtained nano-fibre yams in embodiment 1;
Fig. 3 is the brute force-extensograph of obtained nano-fibre yams in embodiment 1;
Fig. 4 is the Electronic Speculum figure of obtained nano-fibre yams in embodiment 2;
Fig. 5 is the brute force-extensograph of obtained nano-fibre yams in embodiment 2;
Fig. 6 is the Electronic Speculum figure of obtained nano-fibre yams in embodiment 3;
Fig. 7 is the brute force-extensograph of obtained nano-fibre yams in embodiment 3.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiments of the present invention relate to a kind of continuous twisting apparatus for improving nano-fibre yams brute force, as shown in Figure 1, comprise nanofiber generation device, bundles of nanofibers heat treatment apparatus 6 and nano-fibre yams twisting winding device, described nanofiber generation device is for generation of bundles of nanofibers; Described bundles of nanofibers heat treatment apparatus 6 is for carrying out heat treated to the bundles of nanofibers produced; Described nano-fibre yams twisting winding device comprises twisting plate 9 and take up roll 12; Described take up roll 12 is fixed on twisting plate 9 by reinforcing bar 13, and the axis of take up roll 12 is mutually vertical with the axis of twisting plate 9; Described take up roll 12 can be rotated around the axis of self by the first motor 10, and described twisting plate 9 can be rotated around the axis of self by the second motor 7, and the bundles of nanofibers through bundles of nanofibers heat treatment apparatus 6 can be wound up on described take up roll 12.
Described nanofiber generation device comprises the first spinning syringe needle 1 and the second spinning syringe needle 2 be oppositely arranged; The axis side of described first spinneret 1 and the second spinneret 2 is provided with the hollow metal cylinder 5 for receiving nanofiber; Described first spinning syringe needle 1 is connected with high-voltage power cathode 14; Described second spinning syringe needle 2 is connected with high voltage source negative pole 15; Described hollow metal cylinder 5 ground connection.
Distance between first spinning syringe needle 1 and the second spinning syringe needle 2 is that 10-20cm is adjustable; The axis mid point distance of hollow metal cylinder 5 and the first spinning syringe needle 1 and the second spinning syringe needle 2 is that 3-5cm is adjustable; The heating temperature range of bundles of nanofibers heat treatment apparatus 6 be 90-150 DEG C adjustable; Second motor 7 is connected with twisting plate 9 by connecting rod 8, and the second motor 7 rotating speed is that 100-1000r/min is adjustable; First motor 10 is connected with take up roll 12 by connecting rod 11, and the first motor 10 rotating speed is that 1-5m/min is adjustable; The twist of prepared nano-fibre yams is adjustable at 20-500t/m.
The present invention uses said apparatus to carry out the preparation of nano-fibre yams, and its key step is:
Micro-injection pump 3 provides polymer solution can to the first spinning syringe needle 1, micro-injection pump 4 provides polymer solution to the second spinning syringe needle 2, first spinning syringe needle 1 is connected positive pole and the negative pole of high voltage source respectively with the second spinning syringe needle 2, nanofiber sprays from the first spinning syringe needle 1 and the second spinning syringe needle 2 respectively, because nanofiber is electrically contrary, adhere on hollow metal cylinder 5 so attract each other, hollow metal cylinder 5 ground connection, when nanofiber produces in a large number, traction nanofiber head end is last around on the take up roll 12 of twisting plate through bundles of nanofibers heat treatment apparatus 6, second motor 7 controls twisting plate 9 and rotates, first motor 10 controls take up roll 12 and rotates, due to the rotation of twisting plate 9 and take up roll 12, bundles of nanofibers 16 is added is twisted nano-fibre yams 17 rolling simultaneously on take up roll 12.
The effect of bundles of nanofibers heat treatment apparatus 6 is both to dry further the solvent that nano-fibre yams is not volatilized by controlling heating-up temperature, the degree of orientation and the degree of crystallinity of bundles of nanofibers can be improved again, so heat treatment apparatus has important function for the brute force raising of nano-fibre yams and the improvement of integrated quality.
Be not difficult to find, the present invention is mainly through conjugation electrostatic spinning technique, utilize twisting plate and take up roll realization to the twisting of bundles of nanofibers and winding, increase the brute force that heater improves nano-fibre yams, successfully solve the problem that current nano-fibre yams poor continuity, the twist are little, powerful low, the nano-fibre yams of preparation reaches the brute force of common cotton yarn substantially, meet the needs of textile weaving, so the success of nano-fibre yams is prepared in functional textile field have potential extensive use.
The present invention is further illustrated below by three specific embodiments.
Embodiment 1
Utilize polyacrylonitrile (PAN) as solute, dimethyl formamide (DMF) is as solvent, preparation PAN polymer solution is as spinning solution, the mass fraction of PAN solution is 10%, the liquid inventory being controlled the first spinning syringe needle 1 by micro-injection pump 3 is 0.6ml/h, the liquid inventory that micro-injection pump 4 controls the second spinning syringe needle 2 is 0.4ml/h, the voltage of high-voltage power cathode and negative pole is respectively+9.8kv and-9.8kv, the needle point distance of the first spinning syringe needle 1 and the second spinning syringe needle 2 is 14cm, hollow metal cylinder 5 and the first spinning syringe needle 1 and the second spinning syringe needle 2 axis mid point distance are 4cm, hollow metal cylinder 5 and heat treatment apparatus 6 are apart from 6cm, heat treatment apparatus 6 is 5cm with the distance of take up roll 12, heat treatment apparatus temperature is set as 90 DEG C, the rotary speed of twisting plate 9 is set as 100r/min, the rotary speed of take up roll 12 is set as 1m/min, the twist determination of nano-fibre yams is 125t/m, the diameter of nano-fibre yams is 104 μm, nano-fibre yams brute force is 21.94cN.(see Fig. 2), nano-fibre yams elongation at break is 72.31% (see Fig. 3).
Embodiment 2
Utilize polyacrylonitrile (PAN) as solute, dimethyl formamide (DMF) is as solvent, preparation PAN polymer solution is as spinning solution, the mass fraction of PAN solution is 10%, the liquid inventory being controlled the first spinning syringe needle 1 by micro-injection pump 3 is 0.6ml/h, the liquid inventory that micro-injection pump 4 controls the second spinning syringe needle 2 is 0.4ml/h, the voltage of high-voltage power cathode and negative pole is respectively+9.8kv and-9.8kv, the needle point distance of the first spinning syringe needle 1 and the second spinning syringe needle 2 is 10cm, hollow metal cylinder 5 and the first spinning syringe needle 1 and the second spinning syringe needle 2 axis mid point distance are 3cm, hollow metal cylinder 5 and heat treatment apparatus 6 are apart from 6cm, heat treatment apparatus 6 is 5cm with the distance of take up roll 12, heat treatment apparatus temperature is set as 100 DEG C, the rotary speed of twisting plate is set as 250r/min, the rotary speed of take up roll is set as 2m/min, the twist determination of nano-fibre yams is 125t/m, the diameter of nano-fibre yams is 107 μm, nano-fibre yams brute force is 38.8cN.(see Fig. 4), nano-fibre yams elongation at break is 82.21% (see Fig. 5).
Embodiment 3
Utilize polyacrylonitrile (PAN) as solute, dimethyl formamide (DMF) is as solvent, preparation PAN polymer solution is as spinning solution, the mass fraction of PAN solution is 10%, the liquid inventory being controlled the first spinning syringe needle 1 by micro-injection pump 3 is 0.8ml/h, the liquid inventory that micro-injection pump 4 controls the second spinning syringe needle 2 is 0.6ml/h, the voltage of high-voltage power cathode and negative pole is respectively+9.8kv and-9.8kv, the needle point distance of the first spinning syringe needle 1 and the second spinning syringe needle 2 is 20cm, hollow metal cylinder and spinning syringe needle 1 and spinning syringe needle 2 axis mid point distance are 5cm, hollow metal cylinder 5 and heat treatment apparatus 6 are apart from 6cm, heat treatment apparatus 6 is 5cm with the distance of take up roll 12, heat treatment apparatus temperature is set as 150 DEG C, the rotary speed of twisting plate is set as 1000r/min, the rotary speed of take up roll is set as 5m/min, the twist determination of nano-fibre yams is 125t/m, the diameter of nano-fibre yams is 144 μm, nano-fibre yams brute force is 44.98cN.(see Fig. 6), nano-fibre yams elongation at break is 84.25% (see Fig. 7).
Claims (7)
1. one kind for improving the continuous twisting apparatus of nano-fibre yams brute force, comprise nanofiber generation device, bundles of nanofibers heat treatment apparatus (6) and nano-fibre yams twisting winding device, it is characterized in that, described nanofiber generation device is for generation of bundles of nanofibers; Described bundles of nanofibers heat treatment apparatus (6) is for carrying out heat treated to the bundles of nanofibers produced; Described nano-fibre yams twisting winding device comprises twisting plate (9) and take up roll (12); Described take up roll (12) is fixed on twisting plate (9) by reinforcing bar (13), and the axis of take up roll (12) is mutually vertical with the axis of twisting plate (9); Described take up roll (12) can be rotated around the axis of self by the first motor (10), described twisting plate (9) can be rotated around the axis of self by the second motor (7), and the bundles of nanofibers through bundles of nanofibers heat treatment apparatus (6) can be wound up on described take up roll (12).
2. the continuous twisting apparatus for improving nano-fibre yams brute force according to claim 1, is characterized in that, described nanofiber generation device comprises the first spinning syringe needle (1) and the second spinning syringe needle (2) that are oppositely arranged; The axis side of described first spinneret (1) and the second spinneret (2) is provided with the hollow metal cylinder (5) for receiving nanofiber; Described first spinning syringe needle (1) is connected with high-voltage power cathode (14); Described second spinning syringe needle (2) is connected with high voltage source negative pole (15); Described hollow metal cylinder (5) ground connection.
3. the continuous twisting apparatus for improving nano-fibre yams brute force according to claim 2, is characterized in that, the distance between described first spinning syringe needle (1) and the second spinning syringe needle (2) is 10-20cm.
4. the continuous twisting apparatus for improving nano-fibre yams brute force according to claim 2, it is characterized in that, described first spinning syringe needle (1) and the second spinning syringe needle (2) control spinning solution flow by respective micro-injection pump respectively.
5. the continuous twisting apparatus for improving nano-fibre yams brute force according to claim 2, it is characterized in that, described hollow metal cylinder (5) is 3-5cm to the distance of the axis of described first spinning syringe needle (1) and the second spinning syringe needle (2).
6. the continuous twisting apparatus for improving nano-fibre yams brute force according to claim 1, is characterized in that, the heating temperature range of described bundles of nanofibers heat treatment apparatus (6) is 90-150 DEG C.
7. the continuous twisting apparatus for improving nano-fibre yams brute force according to claim 1, is characterized in that, the rolling speed of described first motor (10) is 1-5m/min; The rotating speed of described second motor (7) is 100-1000r/min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106811845A (en) * | 2017-01-20 | 2017-06-09 | 东华大学 | It is spherical to spurt brush type mass nano fibre yarn wire processing device and its application method |
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