阅读说明：本技术 多聚合物混纺的自由液面纺丝方法 (Free liquid level spinning method for multi-polymer blending ) 是由 徐岚 汪屹 于 2019-09-26 设计创作，主要内容包括：本发明涉及一种多聚合物混纺的自由液面纺丝方法,方法包括：提供纺丝装置,纺丝装置包括储液池、高压供电机构、高频振动传感机构及接收机构,储液池具有凹槽,凹槽内设置有用以将凹槽分隔以形成至少两个纺丝区域的隔离机构；配备至少两种纺丝溶液,至少两种纺丝溶液分别放入至少两种纺丝区域内,每种纺丝溶液的液面与隔离机构的顶部齐平且不混合；打开高频振动传感机构,使得至少两种纺丝溶液在隔离机构的顶部边缘两侧同时形成泰勒锥；同时打开高压供电机构,顶部边缘两侧的泰勒锥在电场力的作用下拉伸并纠缠形成混合射流。本发明方法可以使得至少两种纺丝溶液在互相不接触的情况下,可以共同进行纺丝且能够均匀混合以形成纳米复合纤维。(The invention relates to a free liquid level spinning method for multi-polymer blending, which comprises the following steps: providing a spinning device, wherein the spinning device comprises a liquid storage tank, a high-voltage power supply mechanism, a high-frequency vibration sensing mechanism and a receiving mechanism, the liquid storage tank is provided with a groove, and an isolation mechanism for separating the groove to form at least two spinning areas is arranged in the groove; preparing at least two spinning solutions, wherein the at least two spinning solutions are respectively placed in at least two spinning areas, and the liquid level of each spinning solution is flush with the top of the isolation mechanism and is not mixed with the top of the isolation mechanism; opening the high-frequency vibration sensing mechanism to enable at least two spinning solutions to form Taylor cones on two sides of the top edge of the isolation mechanism at the same time; and simultaneously, the high-voltage power supply mechanism is opened, and the Taylor cones on two sides of the top edge are stretched and entangled under the action of the electric field force to form mixed jet flow. The method can enable at least two spinning solutions to be spun together and uniformly mixed to form the nano composite fiber under the condition of not contacting with each other.)

1. A multi-polymer blend free-spinning process, comprising:

providing a spinning device, wherein the spinning device comprises a liquid storage tank, a high-voltage power supply mechanism connected with the liquid storage tank, a high-frequency vibration sensing mechanism used for enabling the liquid storage tank to vibrate, and a receiving mechanism arranged on one side of the liquid storage tank and grounded, the liquid storage tank is provided with a groove, and an isolating mechanism used for separating the groove to form at least two spinning areas is arranged in the groove;

preparing at least two spinning solutions, wherein the at least two spinning solutions are respectively placed in the at least two spinning areas, and the liquid level of each spinning solution is flush with the top of the isolation mechanism and is not mixed with the top of the isolation mechanism;

opening a high-frequency vibration sensing mechanism, wherein the high-frequency vibration of the high-frequency vibration sensing mechanism generates interference on the liquid levels of at least two spinning solutions, so that the at least two spinning solutions form Taylor cones on two sides of the top edge of the isolation mechanism at the same time;

and simultaneously, a high-voltage power supply mechanism is opened, an electric field is formed between the liquid storage tank and the receiving mechanism, and the Taylor cones on two sides of the top edge are stretched and entangled under the action of the electric field force to form mixed jet flow until the mixed jet flow is received on the receiving mechanism.

2. The free level spinning method of a multipolymer blend of claim 1, wherein said high voltage supply means supplies power in the range of 30-70V, said spinning temperature is 20-30 ℃, and said spinning humidity is 40-60%.

3. The multi-polymer blend free-spinning process of claim 1, wherein the tip of said spacer means is smooth and thin tip-like, said taylor cones being formed on both sides of said tip-like tip.

4. The multi-polymer blend free spinning process of claim 1, wherein said receiving means is positioned above said reservoir, and said mixing jet is splashed upward under the influence of an electric field force to be received on said receiving means.

5. The multi-polymer blend free level spinning process of claim 4, wherein said receiving means is located at a distance of 10-25cm from said reservoir.

6. The free level spinning process for multipolymer blends of claim 1, wherein said spinning apparatus further comprises a liquid supply mechanism, said liquid supply mechanism being connected to said reservoir via a liquid transfer line.

7. The free level spinning method of a multipolymer blend of claim 6, wherein the number of said liquid supply means is equal to the number of said spinning fields.

8. The multi-polymer blend freeface spinning process of claim 7, further comprising:

and adjusting the liquid supply speeds of the liquid supply mechanisms containing different spinning solutions to the different spinning areas so as to enable the spinning speeds of the different spinning areas to be consistent.

9. The multi-polymer blend free spinning process of claim 1, wherein said reservoir has an outer wall, said outer wall being formed of a non-conductive polymeric material.

Technical Field

The invention relates to a free liquid level spinning method for multi-polymer blending, belonging to the technical field of electrostatic spinning.

Background

The free liquid level electrostatic spinning is used as a novel spinning process, the co-spinning principle is similar to the bubble electrostatic spinning, the electrostatic force provided by a high-voltage electric field is utilized to overcome the surface tension of the liquid level of the polymer, a Taylor cone is formed on the liquid level of the polymer, jet flow is further formed, and the jet flow is attenuated into nano fibers under the action of the electric field force. Because no bubble is involved in the process, the defects of uncontrollable bubble size, irregular bubble breakage and uneven fiber diameter distribution caused by the uncontrollable bubble size and the irregular bubble breakage are overcome, and the advantage of high yield of bubble electrostatic spinning is also kept. However, when the prepared fiber film is required to be a product blended by a plurality of high polymers, the finally prepared product is not ideal due to chemical reaction which often occurs when two or more high polymer solutions are mixed; or the solution viscosity after mixing is too high to produce fibers at high voltage. For example, when silk fibroin and chitosan are mixed, white flocculent precipitates are generated, and the silk fibroin and the chitosan cannot be spun by a traditional electrostatic spinning device.

Disclosure of Invention

The invention aims to provide a free liquid level spinning method for multi-polymer blending, which can carry out spinning on at least two spinning solutions together without contacting with each other and can uniformly mix the spinning solutions to form nano composite fibers.

In order to achieve the purpose, the invention provides the following technical scheme: a multi-polymer blended free-spinning process comprising:

providing a spinning device, wherein the spinning device comprises a liquid storage tank, a high-voltage power supply mechanism connected with the liquid storage tank, a high-frequency vibration sensing mechanism used for enabling the liquid storage tank to vibrate, and a receiving mechanism arranged on one side of the liquid storage tank and grounded, the liquid storage tank is provided with a groove, and an isolating mechanism used for separating the groove to form at least two spinning areas is arranged in the groove;

preparing at least two spinning solutions, wherein the at least two spinning solutions are respectively placed in the at least two spinning areas, and the liquid level of each spinning solution is flush with the top of the isolation mechanism and is not mixed with the top of the isolation mechanism;

opening a high-frequency vibration sensing mechanism, wherein the high-frequency vibration of the high-frequency vibration sensing mechanism generates interference on the liquid levels of at least two spinning solutions, so that the at least two spinning solutions form Taylor cones on two sides of the top edge of the isolation mechanism at the same time;

and simultaneously, a high-voltage power supply mechanism is opened, an electric field is formed between the liquid storage tank and the receiving mechanism, and the Taylor cones on two sides of the top edge are stretched and entangled under the action of the electric field force to form mixed jet flow until the mixed jet flow is received on the receiving mechanism.

Further, the power supply range of the high-voltage power supply mechanism is 30-70V, the spinning temperature is 20-30 ℃, and the spinning humidity is 40-60%.

Further, the top of the isolation mechanism is smooth and thin tip-shaped, and the taylor cones are formed on both sides of the tip-shaped top.

Further, the receiving mechanism is arranged above the liquid storage tank, and the mixed jet splashes upwards under the action of the electric field force to be received on the receiving mechanism.

Further, the distance between the receiving mechanism and the liquid storage tank is 10-25 cm.

Further, the spinning device also comprises a liquid supply mechanism, and the liquid supply mechanism is connected with the liquid storage tank through a liquid conveying pipe.

Further, the number of the liquid supply mechanisms is equal to that of the spinning areas.

Further, the method further comprises:

and adjusting the liquid supply speeds of the liquid supply mechanisms containing different spinning solutions to the different spinning areas so as to enable the spinning speeds of the different spinning areas to be consistent.

Further, the liquid storage tank is provided with an outer wall, and the material of the outer wall is a non-conductive high polymer material.

The invention has the beneficial effects that: under the action of the high-frequency vibration sensing mechanism and the high-voltage power supply mechanism, Taylor cones are generated on two sides of the edge of the top of the isolation mechanism and are stretched and entangled to form mixed jet flow, so that the nano composite fiber is obtained, and the operation is convenient, simple and rapid.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a spinning apparatus to which the method of the present invention is applied.

Fig. 2 is a schematic cross-sectional view of the isolation mechanism of fig. 1.

FIG. 3 is a flow diagram of a multi-polymer blend free-level spinning process of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 and fig. 2, a spinning device using the method of the present invention includes a high-frequency vibration sensing mechanism 1, a liquid storage tank 2 disposed on the high-frequency vibration sensing mechanism 1, a high-voltage power supply mechanism 3 connected to the liquid storage tank 2, and a receiving mechanism 4 disposed on one side of the liquid storage tank 2, wherein the high-frequency vibration sensing mechanism 1 is configured to generate high-frequency micro motion to interfere with a spinning solution in the liquid storage tank 2, and the high-frequency vibration sensing mechanism 1 is a high-frequency vibration sensor and is a conventional structure, which is not described herein again. In the present exemplary embodiment, the receiving means 4 is arranged above the reservoir 2 and is grounded, so that the upwardly directed jet formed is better received on the receiving means 4. The receiving mechanism 4 may be a net, a roller or the like, and the distance between the receiving mechanism and the liquid storage tank is 10-25cm, which is determined according to practical situations and is not limited herein. The liquid storage tank 2 is provided with an outer wall 22, the outer wall 22 is made of a non-conductive high polymer material, the non-conductive high polymer material can be polytetrafluoroethylene and the like, so that accidents such as electric shock in the spinning process are prevented, meanwhile, the spinning solution is prevented from being looped at the outer wall 22 of the liquid storage tank 2 to generate fibers, the distribution positions of the fibers are different, the prepared fibers are not uniformly distributed, and the prepared fibers are different in amount.

The liquid storage tank 2 is provided with a groove 21 which is formed by inwards recessing the outer surface of the liquid storage tank to contain spinning solution, an isolation mechanism 5 is arranged in the groove 21, the isolation mechanism 5 separates the groove 21 to form at least two spinning areas 6 containing different spinning solution, and the spinning areas 6 are not communicated with each other. Isolation mechanism 5 include first isolator 51 and with second isolator 52 that first isolator 51 is connected, first isolator 51 with be provided with the contained angle between the second isolator 52, the contained angle scope is 0 ~ 180. In this embodiment, the included angle between the first isolation member 51 and the second isolation member 52 is 90 °, that is, a right angle is formed between the two. However, in other embodiments, the included angle between the first isolation member 51 and the second isolation member 52 may be other, and is not limited in this respect according to the actual situation.

As described above, in the present embodiment, four isolation mechanisms 5 are provided to divide the groove 21 into five spinning regions 6, and the four isolation mechanisms 5 are respectively provided at four corners of the groove 21 so that the center portion of the groove 21 forms the cross-shaped spinning region 6. It is needless to say that in other embodiments, the shape of the spinning region 6 formed in the central portion of the groove 21 may be other, and the number of the isolation mechanisms 5 may be other, which is determined according to the actual situation and is not particularly limited herein. After placing different spinning solutions in two adjacent spinning zones 6, spinning is performed.

The cross section of the isolation mechanism 5 is triangular or the top 53 is a polygon with a tip shape, the isolation mechanism 5 has a top 53, the top 53 is smooth and thin with a tip shape, and the purpose of the arrangement is that: the tip area is small, the two solutions are almost not separated at the tip of the isolation mechanism 5, and fibers can be generated on two sides of the tip almost at the same time under the action of an electric field force, so that the finally generated fibers can be uniformly mixed and distributed on the premise that the solutions are not mixed, and the two solutions do not react while the effect is consistent with that of directly mixing the solutions, so that the spinning work is better facilitated; and the structure of the tip is smooth, which is more beneficial to the generation of the Taylor cone 8, thereby improving the spinning yield.

The free liquid level spinning device for the multi-polymer blending further comprises a liquid supply mechanism 7 for supplying liquid to the liquid storage tank 2, the liquid supply mechanism is connected with the liquid storage tank 2 through a liquid conveying pipe, and the number of the liquid supply mechanisms 7 is matched with that of the spinning areas 6. In the present embodiment, not all the liquid supply mechanisms 7 are shown, but only two liquid supply mechanisms 7 for supplying liquid to different spinning regions 6 are shown, and the rest can be determined according to actual conditions.

Referring to fig. 3, the multi-polymer blend free-spinning method of the present invention comprises:

preparing at least two spinning solutions, wherein the at least two spinning solutions are respectively placed in the at least two spinning areas, and the liquid level of each spinning solution is flush with the top of the isolation mechanism and is not mixed with the top of the isolation mechanism;

opening a high-frequency vibration sensing mechanism, wherein the high-frequency vibration of the high-frequency vibration sensing mechanism generates interference on the liquid levels of at least two spinning solutions, so that the at least two spinning solutions form Taylor cones on two sides of the top edge of the isolation mechanism at the same time;

and simultaneously, a high-voltage power supply mechanism is opened, an electric field is formed between the liquid storage tank and the receiving mechanism, and the Taylor cones on two sides of the top edge are stretched and entangled under the action of the electric field force to form mixed jet flow until the mixed jet flow is received on the receiving mechanism. The power supply range of the high-voltage power supply mechanism is 30-70V, the spinning temperature is 20-30 ℃, and the spinning humidity is 40-60%.

The method further comprises the following steps:

and adjusting the liquid supply speeds of the liquid supply mechanisms 7 containing different spinning solutions to the different spinning areas 6 to enable the spinning speeds of the different spinning areas 6 to be consistent, so that the different spinning solutions can be mixed to form the composite nanofiber during spinning.

In this embodiment, the specific implementation process of the method of the present invention is as follows: silk fibroin solution with concentration of 3% (m/v) and chitosan solution with concentration of 0.5% (m/v) are respectively prepared. And injecting the silk fibroin solution into one of the constant-flow liquid supply devices, conveying the silk fibroin solution into one of the spinning areas 6 through a liquid conveying pipe until the liquid level is flush with the tip of the isolation mechanism 5 but does not overflow, injecting the chitosan solution into the other constant-flow liquid supply device, conveying the chitosan solution into the other adjacent spinning area 6 through the liquid conveying pipe, and finally, the liquid level is flush with the tip but does not overflow. Meanwhile, switches of the high-frequency vibration sensing mechanism 1 and the high-voltage power supply mechanism 3 are all opened, high-frequency micro-motion generated by the high-frequency vibration sensing mechanism 1 interferes with both the fibroin solution and the chitosan solution, so that the spinning liquid level forms Taylor cones 8 on two sides of the edge of the tip of the isolation mechanism 5 respectively, the Taylor cones 8 on two sides of the tip are respectively stretched into filaments under the action of electric field force, and in the stretching process, due to mutual entanglement of the Taylor cones 8, the filaments generated by the two solutions can be entangled with each other and are received on the receiving mechanism 4 at the same time, so that the nano composite fibers are formed.

In summary, the following steps: under the action of the high-frequency vibration sensing mechanism 1 and the high-voltage power supply mechanism 3, Taylor cones are generated on two sides of the edge of the top of the isolation mechanism 5 and are stretched and entangled to form mixed jet flow, so that the nano composite fiber is obtained, and the operation is convenient, simple and rapid.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.