CN102925995A - Novel electrostatic spinning method adopting sleeved needle heads - Google Patents
Novel electrostatic spinning method adopting sleeved needle heads Download PDFInfo
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- CN102925995A CN102925995A CN2012100260226A CN201210026022A CN102925995A CN 102925995 A CN102925995 A CN 102925995A CN 2012100260226 A CN2012100260226 A CN 2012100260226A CN 201210026022 A CN201210026022 A CN 201210026022A CN 102925995 A CN102925995 A CN 102925995A
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Abstract
The invention provides a novel electrostatic spinning method adopting sleeved needle heads. According to the invention, an electrostatic spinning device comprises a high-voltage power supply, a liquid supply device, an electro-spinning spray head and a receiver, wherein the liquid supply device is used for supplying electro-spinning liquid to the electro-spinning spray head, nozzles of the electro-spinning spray head are formed by sleeved combination of two or more than two of round hollow needles or combination of a round hole on a spray plate and an internally sleeved round hollow needle (group), annular slits between the two sleeved adjacent round hollow needles, and between the round hole on the spray plate and the internally sleeved adjacent round hollow needle are 0.05-2.0 mm wide, the nozzles are communicated with a high-voltage electrode of the high-voltage power supply (the best way is as follows: the round hollow needle, which is sleeved on the innermost place, is communicated with the high-voltage electrode), the receiver is connected with a ground electrode of the high-voltage power supply, any liquid cannot pass through the round hollow needle, which is sleeved on the innermost place, and the electro-spinning liquid is subjected to electrostatic spinning through the annular slits between the two sleeved adjacent round hollow needles, and between the round hole on the spray plate and the internally sleeved adjacent round hollow needle.
Description
One, technical field
The present invention relates to static electrospinning method, particularly a kind of novel electrostatic electrospinning method that adopts the suit syringe needle belongs to static electrospinning field.
Two, background technology
Electrostatic spinning is the hot subject of nanofiber research both at home and abroad in recent years.Present technical method can be divided into two large classes substantially.The one, the single needle electrostatic spinning, namely electrospinning liquid is by the pin hole ejection homofil of single needle.Two be the pinhead sleeve that varies in size more than two even two together, in the interior pin hole by a kind of component, inside and outside two narrow annular channels between the syringe needle that close on that are nested pass through other components, spin thus multicomponent coated composite fibre.The fiber size that present this two classes electrostatic spinning obtains is thin not enough, how to spin the pursuit that thinner electrospinning fibre becomes electrostatic spinning.Another pursuit of electrostatic spinning is to improve electrospinning efficient.In order to improve electrospinning efficient, prior art is arranging multiplayer pinhole nozzle on the electrospinning shower nozzle usually, often be difficult to occur jet but be in the nozzle electrospinning liquid of shower nozzle core during electrospinning owing to be subject to the electrostatic interaction of nozzle electrospinning liquid on every side, therefore at present on the electrospinning shower nozzle mode of arranging multiplayer pinhole nozzle improve electrospinning efficient and guarantee that the electrospinning quality is often unsatisfactory.Particularly, existing electrospinning can only obtain fiber and fiber web, can not obtain the ring-type electrospinning membranoid substance of continuous homogeneous.
Three, summary of the invention
It is higher even be expected the novel electrostatic spinning process of electrospinning ring-type membranoid substance to the purpose of this invention is to provide the less and electrospinning efficient of a kind of electrospinning fibre size and quality.
The technical solution that realizes the object of the invention is: a kind of novel electrostatic spinning process that adopts the suit syringe needle, its device for spinning comprises high voltage source, liquid feed device, electrospinning shower nozzle and receiving system, liquid feed device is supplied with electrospinning liquid to the electrospinning shower nozzle, to be two or more circular hollow needles carry out combined set by the mode of one in a cover to the nozzle of electrospinning shower nozzle forms, be in the large external diameter that closes on circular hollow needle that overlaps in the inner of internal diameter of outer circular hollow needle, the two narrow annular channel width that close between the circular hollow needle of suit are 0.05～2.0 millimeter, nozzle is communicated with the high-field electrode of high voltage source, receiving system is connected with the earth electrode of high voltage source, be sleeved on and do not pass through any liquid in the interior circular hollow needle, electrospinning liquid carries out electrostatic spinning by two narrow annular channels that close between the circular hollow needle of suit.
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention described here, the mode that nozzle is communicated with the high voltage source high-field electrode preferably is sleeved on interior circular hollow needle and is communicated with the high voltage source high-field electrode.Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention described here, the circular hollow needle of all of suit is preferably concentric.Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention described here, the circular hollow needle of all of suit preferably flushes at the nozzle place.
A kind of novel electrostatic spinning process that adopts the suit syringe needle, its device for spinning comprises high voltage source, liquid feed device, electrospinning shower nozzle and receiving system, liquid feed device is supplied with electrospinning liquid to the electrospinning shower nozzle, the nozzle of electrospinning shower nozzle offers circular hole on the plate for spray and the circular hollow needle of circular hole inner sleeve institute combined set forms, narrow annular channel width between the circular hollow needle of circular hole and its inner sleeve is 0.05～2.0 millimeter, nozzle is communicated with the high-field electrode of high voltage source, receiving system is connected with the earth electrode of high voltage source, by any liquid, electrospinning liquid carries out electrostatic spinning by the narrow annular channel between circular hole and the circular hollow needle that overlaps in it in the circular hollow needle.
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention described here, the mode that nozzle is communicated with the high voltage source high-field electrode preferably circular hollow needle is communicated with the high voltage source high-field electrode.
A kind of novel electrostatic spinning process that adopts the suit syringe needle, its device for spinning comprises high voltage source, liquid feed device, electrospinning shower nozzle and receiving system, liquid feed device is supplied with electrospinning liquid to the electrospinning shower nozzle, the nozzle of electrospinning shower nozzle offers circular hole on the plate for spray and the circular hollow needle group cover of circular hole inner sleeve institute combined set forms, circular hollow needle group cover forms for two or more circular hollow needles carry out combined set by the mode of one in a cover, be in the large external diameter that closes on circular hollow needle that overlaps in the inner of internal diameter of outer circular hollow needle, the two narrow annular channel width that close between the circular hollow needle of suit are 0.05～2.0 millimeter, and circular hole and the narrow annular channel width that closes between the circular hollow needle that overlaps in it are 0.05～2.0 millimeter on the spray plate; Nozzle is communicated with the high-field electrode of high voltage source, receiving system is connected with the earth electrode of high voltage source, be sleeved in the interior circular hollow needle by any liquid, electrospinning liquid by circular hole and overlap in it close on narrow annular channel between the circular hollow needle and two narrow annular channels that close between the circular hollow needle of suit carry out electrostatic spinning.
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention described here, the mode that nozzle is communicated with the high voltage source high-field electrode preferably is sleeved on interior circular hollow needle and is communicated with the high voltage source high-field electrode.
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention, circular hollow needle preferably flushes with the spray plate plate face of offering circular hole.
For 1 electrospinning shower nozzle the electrospinning process of the present invention of 3 nozzles is arranged, all nozzles preferably are arranged on same 1 circumference of electrospinning shower plate face.
There are 4 or 4 the present invention with top nozzle to adopt the novel electrostatic spinning process of suit syringe needle for 1 electrospinning shower nozzle, preferably all arrangement of nozzles are on same 1 circumference of electrospinning shower plate face or on a plurality of concentric circumference, perhaps except 1 nozzle that is arranged in the center all other arrangement of nozzles on same 1 circumference take this nozzle as the center of circle or on a plurality of concentric circumference.
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention, between electrospinning spray nozzle and receiving system, can be provided with auxiliary electrode.
Compared with prior art, the present invention has significant advantage.The present invention adopts simple two (many) needle guards combination or the circular hollow needle of circular hole inner sleeve (group) combination, be sleeved on interior circular hollow needle band high voltage but in should the circle hollow needle by electrospinning liquid, electrospinning liquid carries out electrostatic spinning by the narrow annular channel that closes between the circular hollow needle and circular hole and inner sleeve are closed between the circular hollow needle, can electrospinning obtain than single needle and pin group nozzle electrospinning thin the electrospinning fibre of Duoing.For the electrospinning shower nozzle that is furnished with a plurality of nozzles, employing is sleeved on interior circular hollow needle and is communicated with the high-field electrode of high voltage source to give and spins liquid stream with high voltage, the voltage that spins liquid stream outer surface is relatively low, the nozzle that therefore can overcome to a certain extent electrospinning shower nozzle centre often is difficult to occur the prior art defective of jet, and reduce each nozzle and spin electrostatic interference between the liquid stream, make the electrospinning process more stable.When the present invention adopts suitable auxiliary electrode, also be expected electrospinning and obtain the ring-type membranoid substance.
Four, description of drawings
Fig. 1 is the static electric spinning equipment schematic diagram of novel electrostatic spinning process of the present invention
Fig. 2 is the schematic cross-sectional view that crosspointer suit of the present invention forms nozzle
Fig. 3 is the vertical section schematic diagram that crosspointer suit of the present invention forms nozzle
Fig. 4 is the vertical section schematic diagram that the present invention's three needle guards dress forms nozzle
Fig. 5 is the vertical section schematic diagram that the circular hollow needle of circular hole inner sleeve of the present invention forms nozzle
Fig. 6 is the vertical section schematic diagram that the circular hollow needle group cover of circular hole inner sleeve of the present invention forms nozzle
Fig. 7 is the layout schematic diagram () that a plurality of nozzles are arranged on the electrospinning shower nozzle of the present invention
Fig. 8 is the layout schematic diagram (two) that a plurality of nozzles are arranged on the electrospinning shower nozzle of the present invention
Fig. 9 is the layout schematic diagram (three) that a plurality of nozzles are arranged on the electrospinning shower nozzle of the present invention
Five, the specific embodiment
The present invention adopts the novel electrostatic spinning process of suit syringe needle, its device for spinning comprises high voltage source, liquid feed device, electrospinning shower nozzle and receiving system, liquid feed device is supplied with electrospinning liquid to the electrospinning shower nozzle, to be two or more circular hollow needles carry out combined set by the mode of one in a cover to the nozzle of electrospinning shower nozzle forms, be in the large external diameter that closes on circular hollow needle that overlaps in the inner of internal diameter of outer circular hollow needle, the two narrow annular channel width that close between the circular hollow needle of suit are 0.05～2.0 millimeter, nozzle is communicated with the high-field electrode of high voltage source, receiving system is connected with the earth electrode of high voltage source, be sleeved on and do not pass through any liquid in the interior circular hollow needle, electrospinning liquid carries out electrostatic spinning by two narrow annular channels that close between the circular hollow needle of suit.
Accompanying drawing 1 is a kind of layout schematic diagram of the electrostatic spinning apparatus of novel electrostatic spinning process of the present invention (comprising two kinds of methods that method described here and back will be stated).1 is high voltage source in the accompanying drawing 1, and 2 is the electrospinning shower nozzle, and 3 is liquid feed device, and 4 is receiving system.Certainly, to adopt the electrostatic spinning apparatus of novel electrostatic spinning process of suit syringe needle can be other suitable arrangements in the present invention.Such as, electrostatic spinning can be lower line mode as shown in Figure 1, also can be uplink mode, can also be horizontal mode, etc.
The present invention who forms nozzle for spininess suit adopts the novel electrostatic spinning process of suit syringe needle, the mode that nozzle is communicated with the high voltage source high-field electrode can be any one or any one more than or all circular hollow needles be communicated with the high-field electrode of high voltage source.But in the mode of " the above circular hollow needle of any one of inner sleeve or any one is communicated with the high-field electrode of high voltage source " as good, best mode is to be sleeved on interior circular hollow needle to be communicated with the high-field electrode of high voltage source.In other words, electrospinning process of the present invention can be that any one or any one above or all circular hollow needles are communicated with the high-field electrode of high voltage source, and receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning.But, with " the above circular hollow needle of any one of inner sleeve or any one is communicated with (being the high-field electrode that the circular hollow needle of outermost is not communicated with high voltage source) with the high-field electrode of high voltage source; receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning " as good.Best mode is " only be sleeved on interior circular hollow needle and be communicated with (being the high-field electrode that other circular hollow needles are not communicated with high voltage source) with the high-field electrode of high voltage source; receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning ".Spin liquid stream with high voltage owing to adopt the circular hollow needle of inner sleeve to give, so that it is relatively low to spin liquid stream surface voltage, therefore for the electrospinning shower nozzle that is furnished with a plurality of nozzles, the nozzle that can overcome to a certain extent electrospinning shower nozzle centre often is difficult to occur the prior art defective of jet, and reduce each nozzle and spin electrostatic interference between the liquid stream, make the electrospinning process more stable.
The outlet of ejection electrospinning liquid called nozzle when we were electrostatic spinning among the present invention.The cross section of crosspointer suit composition nozzle of the present invention as shown in Figure 2.1 indication in the accompanying drawing 2 is the circular hollow needle of inner sleeve, and 2 indications are the outer ring hollow needle, and the diagonal line hatches district represents respectively the wall body of the circular hollow needle of inner sleeve and the wall body of outer ring hollow needle, and the dot-hatched district between 1 and 2 is the narrow annular channel that electrospinning liquid passes through.Hollow (being blank parts) of the circular hollow needle of the inner sleeve of 1 indication passes through without any liquid, and be only hollow.
The vertical section of crosspointer suit composition nozzle of the present invention as shown in Figure 3.1 indication in the accompanying drawing 3 is the circular hollow needle of inner sleeve, and 2 indications are the outer ring hollow needle, and the diagonal line hatches district represents respectively the wall body of the circular hollow needle of inner sleeve and the wall body of outer ring hollow needle, and the dot-hatched district between 1 and 2 is the narrow annular channel that the electrospinning liquid A is passed through.Hollow (being blank parts) of the circular hollow needle of the inner sleeve of 1 indication passes through without any liquid, and be only hollow.Best mode is that only circular hollow needle 1 is communicated with (high-field electrode that circular hollow needle 2 is not communicated with high voltage source) with the high-field electrode of high voltage source during electrospinning, and receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning.
The vertical section of the present invention's three needle guards dress composition nozzle as shown in Figure 4.1 indication in the accompanying drawing 4 is to be sleeved on interior circular hollow needle, and 2 indications are the circular hollow needle in centre in the combination of three needle guards dress, and 3 indications are the outer ring hollow needle, and the diagonal line hatches district represents respectively the wall body of three circular hollow needles.The nozzle that this three needle guards dress forms can be used for two kinds of electrospinning liquid of electrospinning, the electrospinning liquid A is by the narrow annular channel between circular hollow needle 1 and the circular hollow needle 2 (dot-hatched district), and the electrospinning liquid B is by the narrow annular channel between circular hollow needle 2 and the circular hollow needle 3 (dot-hatched district).Hollow (being blank parts) that be sleeved on interior circular hollow needle of 1 indication passes through without any liquid, and be only hollow.Best mode is that only circular hollow needle 1 is communicated with (high-field electrode that circular hollow needle 2 and 3 is not communicated with high voltage source) with the high-field electrode of high voltage source during electrospinning, and receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning.
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention described here, the circular hollow needle of all of suit is preferably concentric.Certainly, two of suit close on can decentraction between the circular hollow needle.When two when closing on circular hollow needle decentraction of suit, the width at narrow place should be greater than 0.05 millimeter for narrow annular channel between them.
Adopt the novel electrostatic spinning process of suit syringe needle for the present invention described here, although the circular hollow needle of suit can not flush at the nozzle place, such as the circular hollow needle outlet in being in protrude its outer ring hollow needle outlet that closes on or be in circular hollow needle outlet be lower than outer ring hollow needle outlet that it closes on.But the circular hollow needle of all of suit is preferably in the nozzle place and flushes.
The present invention adopts the novel electrostatic spinning process of suit syringe needle, its device for spinning comprises high voltage source, liquid feed device, electrospinning shower nozzle and receiving system, liquid feed device is supplied with electrospinning liquid to the electrospinning shower nozzle, the nozzle of electrospinning shower nozzle offers circular hole on the plate for spray and the circular hollow needle of circular hole inner sleeve institute combined set forms, narrow annular channel width between the circular hollow needle of circular hole and its inner sleeve is 0.05～2.0 millimeter, nozzle is communicated with the high-field electrode of high voltage source, receiving system is connected with the earth electrode of high voltage source, by any liquid, electrospinning liquid carries out electrostatic spinning by the narrow annular channel between circular hole and the circular hollow needle that overlaps in it in the circular hollow needle.
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention described here, be communicated with the high voltage source high-field electrode although the mode that nozzle is communicated with the high voltage source high-field electrode can be the spray plate of offering circular hole.But best mode is that circular hollow needle is communicated with the high voltage source high-field electrode.In other words, electrospinning process of the present invention can be that the spray plate of offering circular hole is communicated with the high-field electrode of high voltage source, and receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning.But best mode is: only circular hollow needle is communicated with (high-field electrode that the spray plate of namely offering circular hole is not communicated with high voltage source) with the high-field electrode of high voltage source, and receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning.Spin liquid stream with high voltage owing to adopt the circular hollow needle of inner sleeve to give, so that it is relatively low to spin liquid stream surface voltage, therefore for the electrospinning shower nozzle that is furnished with a plurality of nozzles, the nozzle that can overcome to a certain extent electrospinning shower nozzle centre often is difficult to occur the prior art defective of jet, and reduce each nozzle and spin electrostatic interference between the liquid stream, make the electrospinning process more stable.Certainly, the mode that nozzle is communicated with the high voltage source high-field electrode can be that spray plate and the circular hollow needle of offering circular hole all are communicated with the high-field electrode of high voltage source, jointly makes between nozzle and the ground connection receiving system and forms high voltage electric field.
The vertical section of the circular hollow needle composition of circular hole inner sleeve of the present invention nozzle as shown in Figure 5.1 indication in the accompanying drawing 5 is the circular hole 2 interior circular hollow needles that overlap, 2 indications are circular holes of offering at spray plate 4,3 indications are that the base plate of fixing circular hollow needle 1 is local, and 4 indications are that to offer the spray plate of circular hole local, seal into the cavity that the electrospinning liquid A is passed through in suitable mode between spray plate and the base plate.The electrospinning liquid A is carried out electrostatic spinning by the narrow annular channel that the space between spray plate 4 and the base plate 3 flows between circular hollow needle 1 and the circular hole 2.Best mode is that only circular hollow needle 1 is communicated with (high-field electrode that circular hole 2 is not communicated with high voltage source) with the high-field electrode of high voltage source during electrospinning, and receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning.
The present invention adopts the novel electrostatic spinning process of suit syringe needle, its device for spinning comprises high voltage source, liquid feed device, electrospinning shower nozzle and receiving system, liquid feed device is supplied with electrospinning liquid to the electrospinning shower nozzle, the nozzle of electrospinning shower nozzle offers circular hole on the plate for spray and the circular hollow needle group cover of circular hole inner sleeve institute combined set forms, circular hollow needle group cover forms for two or more circular hollow needles carry out combined set by the mode of one in a cover, be in the large external diameter that closes on circular hollow needle that overlaps in the inner of internal diameter of outer circular hollow needle, the two narrow annular channel width that close between the circular hollow needle of suit are 0.05～2.0 millimeter, and circular hole and the narrow annular channel width that closes between the circular hollow needle that overlaps in it are 0.05～2.0 millimeter on the spray plate; Nozzle is communicated with the high-field electrode of high voltage source, receiving system is connected with the earth electrode of high voltage source, be sleeved in the interior circular hollow needle by any liquid, electrospinning liquid by circular hole and overlap in it close on narrow annular channel between the circular hollow needle and two narrow annular channels that close between the circular hollow needle of suit carry out electrostatic spinning.
Offer the novel electrostatic spinning process that the present invention that circular hole and the circular hollow needle group cover of inner sleeve institute combined set form nozzle adopts the suit syringe needle on the plate for spray, be communicated with the high-field electrode of high voltage source although the mode that nozzle is communicated with the high voltage source high-field electrode can be the spray plate of offering circular hole.But in the mode of " any one or any one the above circular hollow needle of circular hole inner sleeve is communicated with the high-field electrode of high voltage source on the spray plate " as good, best mode is to be sleeved on interior circular hollow needle to be communicated with the high-field electrode of high voltage source.In other words, electrospinning process of the present invention described here can be that the spray plate of offering circular hole is communicated with the high-field electrode of high voltage source, and receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning.But, with " any one or any one the above circular hollow needle of circular hole inner sleeve is communicated with (high-field electrode that the spray plate of namely offering circular hole is not communicated with high voltage source) on the spray plate with the high-field electrode of high voltage source; receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning " as good.Best mode is: only be sleeved on interior circular hollow needle and be communicated with (namely offering the spray plate of circular hole and the high-field electrode that other circular hollow needles are not communicated with high voltage source) with the high voltage source high-field electrode, receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning.Spin liquid stream with high voltage owing to adopt the circular hollow needle of inner sleeve to give, so that it is relatively low to spin liquid stream surface voltage, therefore for the electrospinning shower nozzle that is furnished with a plurality of nozzles, the nozzle that can overcome to a certain extent electrospinning shower nozzle centre often is difficult to occur the prior art defective of jet, and reduce each nozzle and spin electrostatic interference between the liquid stream, make the electrospinning process more stable.Certainly, can also be that all circular hollow needles of inner sleeve and the spray plate of offering circular hole all are communicated with the high voltage source electrode, jointly make between nozzle and the ground connection receiving system and form high voltage electric field.
Accompanying drawing 6 is to be placed in the vertical section schematic diagram that circular hole forms nozzle in the group of two circular hollow needles compositions is overlapped.1 and 2 indications in the accompanying drawing 6 are respectively two circular hollow needles, they form circular hollow needle group cover, 3 indications are circular holes of offering on the spray plate 6, be placed in the circular hole 3 in the circular hollow needle group of 1 and 2 compositions is overlapped also and be together to form nozzle, 4 and 5 indications are respectively that the local and middle base plate of the upper plate of fixing circular hollow needle 1 and 2 is local, 6 indications are spray plate parts of offering circular hole 3, and upper plate, middle base plate and spray plate seal into the cavity that electrospinning liquid passes through in suitable mode.The electrospinning liquid A flows into narrow annular channel between circular hollow needle 1 and the circular hollow needle 2 by the space between upper plate and the middle base plate, space between the plate flows into narrow annular channel between circular hollow needle 2 and the circular hole 3 to the electrospinning liquid B by middle base plate and spray, carries out the coated composite electrostatic spinning of electrospinning liquid A and electrospinning liquid B bi-component.Hollow (being blank parts) that be sleeved on interior circular hollow needle of 1 indication passes through without any liquid, and be only hollow.Best mode is that only circular hollow needle 1 is communicated with (high-field electrode that circular hollow needle 2 and circular hole 3 are not communicated with high voltage source) with the high-field electrode of high voltage source during electrospinning, and receiving system is connected with the earth electrode of high voltage source, to carry out electrostatic spinning.
Offer the novel electrostatic spinning process that the present invention that circular hole and the circular hollow needle group cover of inner sleeve institute combined set form nozzle adopts the suit syringe needle on the plate for spray, concentric at all circular hollow needles that circular hole that the spray plate is offered overlaps in preferably with it.Certainly, the circular hole offered of spray plate overlap in it close on circular hollow needle can decentraction, the circular hollow needle group of circular hole inner sleeve overlap any two close on circular hollow needle each other can decentraction.When the circular hole offered of spray plate with overlap when closing on circular hollow needle decentraction in it or the circular hollow needle group of circular hole inner sleeve overlap in two when closing on circular hollow needle decentraction, two of suit closes on narrow annular channel width between the circular hollow needle, and the width at narrow place should be greater than 0.05 millimeter, and the width at narrow place should be greater than 0.05 millimeter with the narrow annular channel width between the outermost circle hollow needle of closing on that overlaps in it for circular hole on the spray plate.
Offer the novel electrostatic spinning process that the present invention that circular hole and the circular hollow needle group cover of inner sleeve institute combined set form nozzle adopts the suit syringe needle on the plate for spray, although circular hollow needle can not flush with the spray plate plate face of offering circular hole, protrude spray plate plate face or the outlet of circular hollow needle of offering circular hole such as circular hollow needle outlet and be lower than the spray plate plate face of offering circular hole.But all circular hollow needles preferably flush with the spray plate plate face of offering circular hole.
For 1 electrospinning shower nozzle the electrospinning process of the present invention of 3 nozzles is arranged, all nozzles preferably are arranged on same 1 circumference of electrospinning shower plate face.Certainly, can adopt other arrangement.
There are the electrospinning process of the present invention of the nozzle more than 4 or 4, all nozzles preferably to be arranged on same 1 circumference of electrospinning shower plate face or on a plurality of concentric circumference, shown in accompanying drawing 7 and accompanying drawing 8 for 1 electrospinning shower nozzle.Perhaps, other all nozzles preferably are arranged on same 1 circumference take this nozzle as the center of circle or on a plurality of concentric circumference, as shown in Figure 9 except 1 nozzle that is arranged in the center.1 indication in accompanying drawing 7, accompanying drawing 8 and the accompanying drawing 9 is the electrospinning shower nozzle, the concentric circles of 2 indications represents offers the nozzle that circular hole and the circular hollow needle of inner sleeve (group cover) form on nozzle that circular hollow needle combined set of the present invention becomes or the spray plate of the present invention, the dotted line of 3 indications is 1 circumference of signal (this dotted line does not represent that there is a circle in electrospinning shower nozzle spare).Certainly, can adopt other arrangement, such as, many rows are arranged in parallel, etc.
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention, between electrospinning spray nozzle and receiving system, can be provided with auxiliary electrode, to improve the electrospinning quality or to reach specific electrospinning requirement etc.
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention, the internal diameter that is sleeved on interior circular hollow needle is the smaller the better in the situation of being convenient to process, and usually is preferably 0.05～3.0 millimeter, certainly can be greater than 3.0 millimeters.
Aforesaid " high-field electrode of high voltage source " can refer to " negative high-voltage electrode ", also can refer to " positive high voltage electrode ".For just, then " high-field electrode of high voltage source " namely refers to " positive high voltage electrode " such as, the output voltage polarity of high voltage source; The output voltage polarity of high voltage source is for negative, and then " high-field electrode of high voltage source " namely refers to " negative high-voltage electrode ".
Adopt the novel electrostatic spinning process of suit syringe needle for the present invention, the jet element that is not communicated with the high voltage source high-field electrode can be to be made by non-conducting material, but the jet element that is communicated with the high voltage source high-field electrode must be that conductive material (such as metal) is made.In other words, the circular hollow needle that is communicated with the high voltage source high-field electrode must be conductive hollow pin (such as the metal hollow pin), the circular hollow needle that is not communicated with the high voltage source high-field electrode can be non-conductive hollow needle (such as the ambroin hollow needle), the spray plate that is communicated with the high voltage source high-field electrode (offering circular hole on it) must be (such as the metallic plate) of conduction, and the spray plate (offering circular hole on it) that is not communicated with the high voltage source high-field electrode can be nonconducting (such as the insulated plastic flitch).
Adopt the novel electrostatic spinning process that is set with syringe needle for the present invention, can on character of the present invention, add again the other technologies feature, but still belong to protection domain of the present invention.Such as, for 1 electrospinning shower nozzle the electrospinning process of the present invention of a plurality of nozzles is arranged, can additional mask on each nozzle further to make each nozzle all can spray more equably silk, improve the electrospinning quality.
Need to prove, only be representative shown in institute's drawings attached, and other variations can be arranged.Such as, spray plate plate face can be the plane shown in accompanying drawing 5 and the accompanying drawing 6, also can be other shapes (such as curved surfaces etc.), the curved surface spray plate that namely at this moment has feature of the present invention also belongs to protection domain of the present invention.Although exist other to change, every have a feature of the present invention all belong to protection domain of the present invention.
Embodiment 1: adopt two hollow stainless pins to be set with one heart the nozzle that forms as shown in Figure 3, the internal diameter of the hollow stainless pin of inner sleeve is 0.15 millimeter, external diameter is 0.5 millimeter, the internal diameter of outer hollow stainless pin is 2.0 millimeters, external diameter is 3.6 millimeters, adopting 10% polystyrene toluene solution is electrospinning liquid, the hollow stainless pin of inner sleeve is communicated with the high-field electrode of high voltage source, voltage is 20 kilovolts, the metal dash receiver is communicated with the earth electrode of high voltage source, distance is 15 centimetres between nozzle and the metal dash receiver, and the polystyrene toluene solution carries out electrostatic spinning by the narrow annular channel between two hollow stainless pins and obtains styroflex.
Embodiment 2: adopt and to offer circular hole and circular hole inner sleeve hollow stainless pin institute combined set on the insulating epoxy spray plate and form as shown in Figure 5 nozzle, circular hole is concentric with the hollow stainless pin, the internal diameter of hollow stainless pin is 0.8 millimeter, external diameter is 1.2 millimeters, the aperture of offering circular hole on the epoxy resin spray plate is 2.8 millimeters, adopting 10% polystyrene toluene solution is electrospinning liquid, the hollow stainless pin is communicated with the high-field electrode of high voltage source, voltage is 20 kilovolts, the metal dash receiver is communicated with the earth electrode of high voltage source, distance is 16 centimetres between nozzle and the metal dash receiver, and the polystyrene toluene solution carries out electrostatic spinning by the narrow annular channel between circular hole and the hollow stainless pin and obtains styroflex.
Comparative example 1: adopting 10% polystyrene toluene solution is electrospinning liquid, be that 0.8 millimeter, external diameter are that 1.2 millimeters hollow stainless pin carries out electrostatic spinning by internal diameter, the hollow stainless pin is communicated with the high-field electrode of high voltage source, voltage is 20 kilovolts, the metal dash receiver is communicated with the earth electrode of high voltage source, distance is 16 centimetres between nozzle and the metal dash receiver, obtains styroflex by electrospinning.
Compare with the styroflex that comparative example 1 electrospinning obtains, the average diameter of the styroflex that embodiment 1 and embodiment 2 electrospinnings obtain reduces respectively about 60% and about 45%, and electrospinning efficient improves respectively about 75% and about 45%.
In addition, we adopt the present invention to adopt the novel electrostatic spinning process of suit syringe needle, the two narrow annular channel width that close between the circular hollow needle of suit are controlled at arbitrary value between 0.05～2.0 millimeter, circular hole and the narrow annular channel width that closes between the circular hollow needle that overlaps in it are controlled at arbitrary value between 0.05～2.0 millimeter on the spray plate, all obtain goal of the invention of the present invention, namely the electrospinning fibre size is less higher with electrospinning efficient and quality.
Claims (10)
1. one kind is adopted the novel electrostatic spinning process that is set with syringe needle, its device for spinning comprises high voltage source, liquid feed device, electrospinning shower nozzle and receiving system, liquid feed device is supplied with electrospinning liquid to the electrospinning shower nozzle, it is characterized in that: to be two or more circular hollow needles carry out combined set by the mode of one in a cover to the nozzle of electrospinning shower nozzle forms, be in the large external diameter that closes on circular hollow needle that overlaps in the inner of internal diameter of outer circular hollow needle, the two narrow annular channel width that close between the circular hollow needle of suit are 0.05～2.0 millimeter, nozzle is communicated with the high-field electrode of high voltage source, receiving system is connected with the earth electrode of high voltage source, be sleeved on and do not pass through any liquid in the interior circular hollow needle, electrospinning liquid carries out electrostatic spinning by two narrow annular channels that close between the circular hollow needle of suit.
2. the novel electrostatic spinning process of described employing suit syringe needle according to claim 1, it is characterized in that: the mode that nozzle is communicated with the high voltage source high-field electrode is to be sleeved on interior circular hollow needle to be communicated with the high voltage source high-field electrode.
3. the novel electrostatic spinning process of described employing suit syringe needle according to claim 1 and 2, it is characterized in that: the circular hollow needle of all of suit is concentric.
4. each described employing is set with the novel electrostatic spinning process of syringe needle according to claim 1～3, and it is characterized in that: the circular hollow needle of all of suit flushes at the nozzle place.
5. one kind is adopted the novel electrostatic spinning process that is set with syringe needle, its device for spinning comprises high voltage source, liquid feed device, electrospinning shower nozzle and receiving system, liquid feed device is supplied with electrospinning liquid to the electrospinning shower nozzle, it is characterized in that: the nozzle of electrospinning shower nozzle offers circular hole on the plate for spray and the circular hollow needle of circular hole inner sleeve institute combined set forms, narrow annular channel width between the circular hollow needle of circular hole and its inner sleeve is 0.05～2.0 millimeter, nozzle is communicated with the high-field electrode of high voltage source, receiving system is connected with the earth electrode of high voltage source, by any liquid, electrospinning liquid carries out electrostatic spinning by the narrow annular channel between circular hole and the circular hollow needle that overlaps in it in the circular hollow needle.
6. the novel electrostatic spinning process of described employing suit syringe needle according to claim 5, it is characterized in that: the mode that nozzle is communicated with the high voltage source high-field electrode is that circular hollow needle is communicated with the high voltage source high-field electrode.
7. one kind is adopted the novel electrostatic spinning process that is set with syringe needle, its device for spinning comprises high voltage source, liquid feed device, electrospinning shower nozzle and receiving system, liquid feed device is supplied with electrospinning liquid to the electrospinning shower nozzle, it is characterized in that: the nozzle of electrospinning shower nozzle offers circular hole on the plate for spray and the circular hollow needle group cover of circular hole inner sleeve institute combined set forms, circular hollow needle group cover forms for two or more circular hollow needles carry out combined set by the mode of one in a cover, be in the large external diameter that closes on circular hollow needle that overlaps in the inner of internal diameter of outer circular hollow needle, the two narrow annular channel width that close between the circular hollow needle of suit are 0.05～2.0 millimeter, and circular hole and the narrow annular channel width that closes between the circular hollow needle that overlaps in it are 0.05～2.0 millimeter on the spray plate; Nozzle is communicated with the high-field electrode of high voltage source, receiving system is connected with the earth electrode of high voltage source, be sleeved in the interior circular hollow needle by any liquid, electrospinning liquid by circular hole and overlap in it close on narrow annular channel between the circular hollow needle and two narrow annular channels that close between the circular hollow needle of suit carry out electrostatic spinning.
8. the novel electrostatic spinning process of described employing suit syringe needle according to claim 7, it is characterized in that: the mode that nozzle is communicated with the high voltage source high-field electrode is to be sleeved on interior circular hollow needle to be communicated with the high voltage source high-field electrode.
9. each described employing is set with the novel electrostatic spinning process of syringe needle according to claim 5～8, and it is characterized in that: circular hollow needle flushes with the spray plate plate face of offering circular hole.
10. each described employing is set with the novel electrostatic spinning process of syringe needle according to claim 1～9, it is characterized in that: 1 electrospinning shower nozzle has the nozzle more than 4 or 4, all arrangement of nozzles on same 1 circumference of electrospinning shower plate face or on a plurality of concentric circumference, perhaps except 1 nozzle that is arranged in the center all other arrangement of nozzles on same 1 circumference take this nozzle as the center of circle or on a plurality of concentric circumference.
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| CN201210026022.6A CN102925995B (en) | 2012-02-07 | 2012-02-07 | Use the novel electrostatic spinning process of suit syringe needle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210026022.6A CN102925995B (en) | 2012-02-07 | 2012-02-07 | Use the novel electrostatic spinning process of suit syringe needle |
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| CN102925995B CN102925995B (en) | 2016-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352261A (en) * | 2013-07-24 | 2013-10-16 | 苏州大学 | Sandwich type electrostatic spinning spraying head and method for manufacturing regenerative fibroin nanofiber yarn |
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| DE102005048334A1 (en) * | 2004-10-12 | 2006-04-13 | Saurer Gmbh & Co. Kg | Apparatus for melt spinning and cooling synthetic filament tow, for producing textile yarns, having blast candle with blast mantle comprising perforated metal cylinder, giving even cooling air blast |
| CN101220524A (en) * | 2007-01-11 | 2008-07-16 | 刘冉 | Method for producing nano-fibre film with macromolecular solution electrostatic filature and implementing equipment |
| US20090102100A1 (en) * | 2007-10-23 | 2009-04-23 | Ppg Industries Ohio, Inc. | Fiber formation by electrical-mechanical spinning |
| CN201850336U (en) * | 2010-11-22 | 2011-06-01 | 北京化工大学 | Horn-shaped efficient electrostatic spinning spray head |
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2012
- 2012-02-07 CN CN201210026022.6A patent/CN102925995B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005048334A1 (en) * | 2004-10-12 | 2006-04-13 | Saurer Gmbh & Co. Kg | Apparatus for melt spinning and cooling synthetic filament tow, for producing textile yarns, having blast candle with blast mantle comprising perforated metal cylinder, giving even cooling air blast |
| CN101220524A (en) * | 2007-01-11 | 2008-07-16 | 刘冉 | Method for producing nano-fibre film with macromolecular solution electrostatic filature and implementing equipment |
| US20090102100A1 (en) * | 2007-10-23 | 2009-04-23 | Ppg Industries Ohio, Inc. | Fiber formation by electrical-mechanical spinning |
| CN201850336U (en) * | 2010-11-22 | 2011-06-01 | 北京化工大学 | Horn-shaped efficient electrostatic spinning spray head |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352261A (en) * | 2013-07-24 | 2013-10-16 | 苏州大学 | Sandwich type electrostatic spinning spraying head and method for manufacturing regenerative fibroin nanofiber yarn |
| CN103352261B (en) * | 2013-07-24 | 2016-02-03 | 苏州大学 | Sandwich-type electrostatic spinning nozzle and prepare the method for regenerated silk nano fibre yarn |
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| CN102925995B (en) | 2016-12-14 |
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