Three-leaf type PEEK monofilament spinneret plate and three-leaf type PEEK monofilament
By designing a three-lobed PEEK monofilament spinneret and monofilament, the problem of low mechanical strength of the substrate mesh was solved, and the stability of the substrate mesh and proton exchange membrane as well as the electrolysis efficiency were improved.
Patent Information
- Application Number
- CN202422062492.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The spinneret holes of traditional PEEK fibers are circular, resulting in low mechanical strength of the resulting base mesh, which is prone to breakage or deformation, affecting the stable operation of the PEM electrolyzer.
A trilobal PEEK monofilament spinneret and trilobal PEEK monofilament are used, and the spinneret hole and the monofilament cross section are designed to be trilobal, which increases the friction between the fibers and reduces the fiber diameter.
It improves the mechanical strength of the substrate mesh and proton exchange membrane, prevents breakage and deformation, enhances the stable operation of the PEM electrolyzer, and improves proton conductivity and electrolysis efficiency.
Smart Images
Figure CN223445701U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of water electrolysis hydrogen production, in particular to three-leaf type PEEK monofilament spinneret plate and three-leaf type PEEK monofilament. BACKGROUND
[0002] In the water electrolysis hydrogen production industry, the proton exchange membrane is the core component of PEM water electrolysis hydrogen production, and the proton exchange membrane is generally composed of a substrate mesh and a perfluorosulfonic acid resin coated on the surface of the substrate mesh. The main technical requirements for the proton exchange membrane currently include: good proton conductivity, small electroosmotic effect of water molecules in the membrane, as small as possible permeability of gas in the membrane, good electrochemical stability, good dry-wet conversion performance, high mechanical strength, etc.
[0003] As an important component of the proton exchange membrane, the mechanical strength and thickness of the substrate mesh directly affect the mechanical strength and thickness of the proton exchange membrane. The substrate mesh is woven from PEEK fibers, and therefore the fiber form and fineness of the PEEK fibers determine the mechanical strength and thickness of the substrate mesh and the proton exchange membrane.
[0004] Currently, the spinning cross-sectional shape of the spinning hole of the traditional spinneret plate is circular, resulting in the cross-sectional shape of the PEEK fibers produced being also circular. Such PEEK fibers with a circular spinning cross-section have a smooth surface, and after the substrate mesh is produced, the friction between the warp and weft fibers of the substrate mesh is relatively small, causing the mechanical strength of the substrate mesh to be low, which leads to the substrate mesh being prone to damage or deformation during use, affecting the stable operation of the PEM electrolytic cell. UTILITY MODEL CONTENTS
[0005] The first object of the utility model is to provide a three-leaf type PEEK monofilament spinneret plate capable of producing PEEK monofilaments that are beneficial to improving the mechanical strength of the substrate mesh.
[0006] To achieve the above object, the utility model adopts the following technical scheme: a three-leaf type PEEK monofilament spinneret plate, comprising a spinneret plate body and a plurality of spinning holes provided on the spinneret plate body, the spinning hole is composed of a flow guide hole and a spinning micro-hole, and the cross-sectional shape of the spinning micro-hole is specifically as follows: it comprises three leaves, the three leaves are evenly distributed in a circumferential direction around the center axis of the spinning hole, each leaf is composed of two long sides and one short side, the end of each long side that is far away from the center axis of the spinning hole is defined as the long side outer end, and the end close to the center axis of the spinning hole is defined as the long side inner end, the long side outer ends of the two long sides of each leaf are connected by the short side, and the long side inner end of each long side of each leaf is connected with the long side inner end of the adjacent long side of the adjacent leaf, so that the three leaves form a spinning micro-hole cross-sectional shape with a three-leaf type closed contour.
[0007] Further, the three-leaf PEEK monofilament spinneret as claimed in the preceding, wherein: in the cross-sectional shape of the spinning micro-hole, the short side of each leaf is a circular-arc short side protruding away from the center of the spinning micro-hole.
[0008] Further, the three-leaf PEEK monofilament spinneret as claimed in the preceding, wherein: in the cross-sectional shape of the spinning micro-hole, the short side of each leaf is a circular-arc short side protruding away from the center of the spinning micro-hole.
[0009] Further, the three-leaf PEEK monofilament spinneret as claimed in the preceding, wherein: in the cross-sectional shape of the spinning micro-hole, the short side of each leaf is a circular-arc short side protruding away from the center of the spinning micro-hole.
[0010] Further, the three-leaf PEEK monofilament spinneret as claimed in the preceding, wherein: in the cross-sectional shape of the spinning micro-hole, the short side of each leaf is a circular-arc short side protruding away from the center of the spinning micro-hole.
[0011] Further, the three-leaf PEEK monofilament spinneret as claimed in the preceding, wherein: in the cross-sectional shape of the spinning micro-hole, the short side of each leaf is a circular-arc short side protruding away from the center of the spinning micro-hole.
[0012] Further, the three-leaf PEEK monofilament spinneret as claimed in the preceding, wherein: in the cross-sectional shape of the spinning micro-hole, the short side of each leaf is a circular-arc short side protruding away from the center of the spinning micro-hole.
[0013] The second object of the utility model is to provide a three-leaf PEEK monofilament which can improve the mechanical strength of the base material net cloth.
[0014] To achieve the above object, the utility model adopts the following technical scheme: a three-leaf PEEK monofilament, which comprises a monofilament body in the center, three identical leaves are uniformly arranged in the circumferential direction on the outer periphery of the monofilament body, and in the cross-sectional shape of the monofilament, the outer contour of each leaf comprises two long sides and a short side, the long side end part far away from the monofilament body is defined as the long side outer end, and the long side end part close to the monofilament body is defined as the long side inner end, the long side inner ends of the two long sides are connected with the monofilament body, and the long side outer ends of the two long sides are connected through the short side.
[0015] Further, the aforementioned tri-lobed PEEK monofilament, wherein: in the cross-sectional shape of the monofilament, the short side of each lobe is a circular arc shape protruding away from the center of the monofilament body, and the apexes of the circular arc short sides of the three lobes are located on the same graduated circle with the center of the monofilament body as the center; the two long sides of each lobe are symmetrically distributed on both sides of a straight line passing through the apex of the circular arc short side of the lobe and the center of the monofilament body; the distance between the apex of the circular arc short side of each lobe and the center of the monofilament body is 0.2-0.6 mm, and the distance between the two long sides of each lobe is 0.05-0.15 mm.
[0016] Through implementation of the technical solution, the tri-lobed PEEK monofilament has the following advantages: (1) the cross section of the spinning orifice of the spinneret is tri-lobed, and the PEEK monofilament produced thereby is also tri-lobed; after the tri-lobed PEEK monofilament is woven into a base material mesh, the friction between the warp and weft fibers of the base material mesh is increased, thereby enhancing the mechanical strength of the base material mesh and the proton exchange membrane, preventing the base material mesh and the proton exchange membrane from being damaged and deformed during use, and ensuring stable operation of the PEM electrolytic cell; (2) the radial ratio of the spinning orifice of the carrier plate and the size of each lobe in the spinning orifice are designed, which greatly reduces the fiber diameter of the PEEK monofilament spun out of the spinning orifice, and the fiber diameter can be less than 25 μm; the base material mesh made of the PEEK monofilament with a smaller fiber diameter is thinner, and the proton exchange membrane made thereby is also thinner; the reduction in the thickness of the proton exchange membrane improves proton conductivity, thereby improving the electrolysis efficiency of the PEM water electrolysis hydrogen production; (3) the cross-sectional shape of the PEEK monofilament is designed to be tri-lobed; after the tri-lobed PEEK monofilament is woven into a base material mesh, the friction between the warp and weft fibers of the base material mesh is increased, thereby enhancing the mechanical strength of the base material mesh and the proton exchange membrane, preventing the base material mesh and the proton exchange membrane from being damaged and deformed during use, and ensuring stable operation of the PEM electrolytic cell. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 FIG. 1 is a structural schematic view of a tri-lobed PEEK monofilament spinneret according to the present application.
[0018] Figure 2 FIG. 4 is a structural schematic view of a spinning orifice of the tri-lobed PEEK monofilament spinneret.
[0019] Figure 3 FIG. 5 is a structural schematic view of each lobe in the spinning orifice of the tri-lobed PEEK monofilament spinneret.
[0020] Figure 4 FIG. 6 is a perspective profile schematic view of the spinning orifice of the tri-lobed PEEK monofilament spinneret.
[0021] Figure 5 FIG. 7 is a structural schematic view of a cross section of the tri-lobed PEEK monofilament.
[0022] Figure 6Schematic diagram of the three-dimensional structure of trilobal PEEK monofilament. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
[0024] like Figure 1 、 Figure 2 As shown, the three-lobed PEEK monofilament spinneret comprises a spinneret body 1 and a plurality of spinneret holes provided on the spinneret body 1, wherein the spinneret holes are composed of a guide hole 2 and a spinneret microhole 3 having the same central axis m. The cross-sectional shape of the spinneret microhole 3 is specifically as follows: it comprises three leaves 31 of the same shape, the three leaves 31 are uniformly distributed circumferentially around the central axis m of the spinneret hole, each leaf 31 is composed of two long sides 311 and one short side 312, and the end of each long side 311 away from the central axis m of the spinneret hole is defined as the outer end of the long side, and the end close to the central axis m of the spinneret hole is defined as the inner end of the long side. The outer ends of the two long sides 311 of each leaf 31 are connected by a short side 312, and the inner end of each long side 311 of each leaf 31 is connected to the inner end of the long side of the adjacent long side of the adjacent leaf, so that the three leaves 31 constitute a spinneret microhole cross-sectional shape having a three-lobed closed contour;
[0025] In this embodiment, if Figure 3 As shown, in the cross-sectional shape of the spinneret microhole 3, the short side 312 of each lobe 31 is an arc-shaped short side convex in the direction away from the center a of the spinneret microhole, and the diameter of the circle in which the arc-shaped short side is located is the distance between the two long sides 311 of the lobe; in the cross-sectional shape of the spinneret microhole 3, the center a of the spinneret microhole is the intersection of the cross-sectional shape and the central axis m of the spinneret microhole; in this embodiment, in the cross-sectional shape of the spinneret microhole 3, the vertices b of the arc-shaped short sides of the three lobe 31 are located on the same dividing circle c with the center a of the spinneret microhole as the center; in this embodiment, in the cross-sectional shape of the spinneret microhole 3, the two long sides 311 of each lobe 31 are symmetrically distributed on both sides of the straight line d passing through the vertices b of the arc-shaped short sides 312 of the lobe and the center a of the spinneret microhole; the cross-sectional shape design of the above-mentioned spinneret microhole can further improve the stability of the produced PEEK monofilament;
[0026] In this embodiment, the aspect ratio of the spinneret micropore 3 is 8 to 10, and the length in the aspect ratio of the spinneret micropore 3 is the height of the spinneret micropore. Figure 4 As shown in the figure, X is the length in the aspect ratio of the spinneret microhole; the diameter in the aspect ratio of the spinneret microhole 3 is the diameter of the circle with the center a of the spinneret microhole as the center and the distance between the vertex b of the short side of the arc of any leaf in the spinneret microhole and the center a of the spinneret microhole as the radius, as shown in the figure. Figure 4As shown in the figure, Y is the diameter in the length-diameter ratio of the spinning micro-hole; in this embodiment, Y=2R; in the cross-sectional shape of the spinning micro-hole 3, the distance R between the vertex b of the circular arc short side 312 of each leaf 31 in the spinning micro-hole 3 and the center a of the spinning micro-hole is 0.2-0.6 mm, and the distance h between the two long sides 311 of each leaf 31 in the spinning micro-hole 3 is 0.05-0.15 mm; such a spinning micro-hole size design can greatly reduce the fiber diameter of the PEEK monofilament sprayed from the spinning micro-hole, and the fiber diameter can be less than 25 μm; the base mesh fabric made of the PEEK monofilament with such a small fiber diameter is thinner, and thus the proton exchange membrane made of the PEEK monofilament is also thinner; the reduction of the thickness of the proton exchange membrane can improve the proton conductivity, thereby improving the electrolysis efficiency of the PEM water electrolysis hydrogen production;
[0027] In this embodiment, one of the three leaves 31 of the spinning micro-hole 3 points away from the center of the spinning plate body along the radial direction of the center of the spinning plate body; the spinning holes are arranged in a plurality of circles with the center of the spinning plate body as the center on the spinning plate body, and the spinning holes on each circle are uniformly arranged; such an arrangement of the spinning micro-hole and the leaves in the spinning micro-hole can ensure that the PEEK monofilament can be uniformly cooled in the subsequent air blowing cooling process of the PEEK monofilament, thereby improving the stability of the PEEK monofilament; during the cooling process, the flow direction of the gas on the PEEK monofilament is as shown in the figure. Figure 2
[0028] The utility model discloses still a kind of three-lobed PEEK monofilament, which is prepared from the three-lobed PEEK monofilament spinneret, as shown in Figure 5 、 Figure 6 As shown, the trilobal PEEK monofilament includes a monofilament body 4 located in the center, and three identical leaves 5 are evenly arranged along the circumferential direction on the outer periphery of the monofilament body 4. The monofilament body 4 and the three leaves 5 are integrally formed. In the cross-sectional shape of the monofilament, the outer contour of each leaf 5 includes: two long sides 51 and one short side 52. The long side end away from the monofilament body 4 at both ends of each long side 51 is defined as the long side outer end, and the long side end close to the monofilament body 4 is defined as the long side inner end. The long side inner ends of the two long sides 51 are connected to the monofilament body 4, and the long side outer ends of the two long sides 51 are connected through the short side 52. In the cross-sectional shape of the monofilament, the short side 52 of each leaf 5 is an arc convex in the direction away from the center e of the monofilament body, and the arc-shaped short sides 52 of the three leaves 5 are The vertex f is located on the same pitch circle g with the center e of the monofilament body as the center; the two long sides 51 of each lobe 5 are symmetrically distributed on both sides of the straight line k passing through the vertex f of the arc-shaped short side 52 of the lobe and the center e of the monofilament body; the distance L between the vertex f of the arc-shaped short side 52 of each lobe 5 and the center e of the monofilament body is 0.2~0.6mm, and the distance n between the two long sides 51 of each lobe 5 is 0.05~0.15mm; after this trilobal PEEK monofilament is woven into a base mesh, it can increase the friction between the warp and weft fibers of the base mesh, thereby enhancing the mechanical strength of the base mesh and the proton exchange membrane, preventing the base mesh and the proton exchange membrane from being damaged and deformed during use, and ensuring the stable operation of the PEM electrolyzer.
[0029] The beneficial effects of the present invention are as follows: (1) the cross section of the spinneret micropores is trilobal, and the PEEK monofilaments produced also have a trilobal shape. After being woven into a base mesh, the trilobal PEEK monofilaments can increase the friction between the warp and weft fibers of the base mesh, thereby enhancing the mechanical strength of the base mesh and the proton exchange membrane, preventing the base mesh and the proton exchange membrane from being damaged and deformed during use, and ensuring the stable operation of the PEM electrolyzer; (2) by designing the radial ratio of the spinneret micropores of the spinning plate and the size of each leaf in the spinneret micropores, the fiber diameter of the PEEK monofilaments ejected from the spinneret micropores can be greatly reduced, and the fiber diameter can be reduced. The diameter of the PEEK monofilament is less than 25 μm. The thickness of the base mesh made of PEEK monofilament with a smaller fiber diameter will be thinner, and the proton exchange membrane made will also be thinner. The reduction in the thickness of the proton exchange membrane will increase the proton conductivity, thereby improving the electrolysis efficiency of PEM water electrolysis to produce hydrogen; (3) The cross-sectional shape of the PEEK monofilament is designed to be trilobal. After the trilobal PEEK monofilament is woven into the base mesh, it can increase the friction between the warp and weft fibers of the base mesh, thereby enhancing the mechanical strength of the base mesh and the proton exchange membrane, preventing the base mesh and the proton exchange membrane from being damaged and deformed during use, and ensuring the stable operation of the PEM electrolyzer.
[0030] The above merely is the preferred embodiment of the present application, and is not any other form of limitation to the present application, and any modification or equivalent change according to the technical essence of the present application still belongs to the range required to be protected by the present application.
Claims
1. A trilobate PEEK monofilament spinneret, comprising a spinneret body and a plurality of spinneret holes disposed on the spinneret body, characterized in that: The spinneret is composed of a coaxial guide hole and a spinneret microhole. The cross-sectional shape of the spinneret microhole is specifically as follows: it includes three lobes, the three lobes are uniformly arranged circumferentially around the central axis of the spinneret, and each lobe is composed of two long sides and one short side. The end of each long side away from the central axis of the spinneret is defined as the outer end of the long side, and the end close to the central axis of the spinneret is defined as the inner end of the long side. The outer ends of the two long sides of each lobe are connected by a short side, and the inner end of each long side of each lobe is connected to the inner end of the long side of the adjacent long side of the adjacent lobe, so that the three lobes constitute a spinneret microhole cross-sectional shape with a three-lobed closed contour; in the cross-sectional shape of the spinneret microhole, the short side of each lobe is an arc-shaped short side convex in the direction away from the center of the spinneret microhole; in the cross-sectional shape of the spinneret microhole, the vertices of the arc-shaped short sides of the three lobes are located on the same pitch circle with the center of the spinneret microhole as the center; The aspect ratio of the spinneret micropore is 8 to 10, where the length in the aspect ratio is the height of the spinneret micropore, and the diameter in the aspect ratio is the diameter of a circle formed by taking the center of the spinneret micropore as the center and the distance between the vertex of the arcuate short side of any lobe in the spinneret micropore and the center of the spinneret micropore as the radius; one of the three lobes of the spinneret micropore points radially away from the center of the spinneret body; and in the cross-sectional shape of the spinneret micropore, the distance between the vertex of the arcuate short side of each lobe in the spinneret micropore and the center of the spinneret micropore is 0.2 to 0.6 mm, and the distance between the two long sides of each lobe in the spinneret micropore is 0.05 to 0.15 mm.
2. The three-lobed PEEK monofilament spinneret according to claim 1, characterized in that: In the cross-sectional shape of the spinneret microhole, the two long sides of each lobe are symmetrically distributed on both sides of a straight line passing through the vertex of the arc-shaped short side of the lobe and the center of the spinneret microhole.
3. The three-lobed PEEK monofilament spinneret according to claim 1 or 2, characterized in that: The spinneret holes are arranged on the spinneret body to form a plurality of circles with the center of the spinneret body as the center, and the spinneret holes on each circle are evenly arranged.