Ultraviolet sensitization device for nuclear track membrane

Abstract

The utility model discloses an ultraviolet sensitization device for a nuclear track membrane, which comprises an ultraviolet light source, an ultraviolet light source, an ultraviolet light source, an ultraviolet light source and an ultraviolet light source, the working platform is used for placing or bearing the nuclear track membrane; the working platform comprises a circulating device, and the circulating device is used for driving the nuclear track membrane to be subjected to circulating sensitization in a preset time period under the irradiation of the ultraviolet light source. The efficient sensitization of the nuclear track membrane is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear pore membranes, in particular to a nuclear pore membrane ultraviolet sensitization device. Background Art

[0002] Nuclear pore membranes are made by using high-energy heavy ions to punch holes in polymer films, and then expanding the holes through physical or chemical methods. They are also called heavy ion microporous membranes. The hole expansion methods include UV sensitization, stretching, and chemical etching.

[0003] Nuclear pore membranes need to be prepared with cylindrical pores, conical pores, and conical rough surfaces by over-etching according to demand. For the preparation of cylindrical pore nuclear pore membranes, the actual nuclear pore membrane products are double-conical pores, that is, the pores on the surface of the nuclear pore membrane are large, while the pores inside are small. The existence of taper will affect the following four aspects: (1) The small pore size in the nuclear pore membrane will restrict the performance of the nuclear pore membrane product. The small pore size in the nuclear pore membrane will reduce the gas, liquid or ion flux. (2) It is impossible to produce a nuclear pore membrane with a small pore size. The existence of the cone angle makes it impossible to prepare a nuclear pore membrane with a small pore size because the inner pore of the nuclear pore membrane with a small pore size has no etching through. (3) For a nuclear pore membrane with a conical pore, a smaller taper can achieve a conical pore with a larger aspect ratio, and it can also be used as a template to prepare nanocones with a large aspect ratio. (4) For over-etched nuclear pore membrane products, taper is an important factor affecting the surface roughness. When other conditions are the same, the smaller the taper, the greater the surface roughness.

[0004] The solution to the above problem in the prior art is ultraviolet sensitization, which can reduce the taper. The current ultraviolet method for small samples in the laboratory is to use an ultraviolet halogen lamp to irradiate a small sample with a diameter of several centimeters, which takes several hours. The disadvantage of this method is that it takes a long time, the irradiated sample is small, and the efficiency is not high. In addition, some thicker nuclear pore membranes have strong ultraviolet absorption, and it is impossible to achieve long-term sensitization of large-area nuclear pore membranes by interlacing multiple layers. Utility Model Content

[0005] The utility model provides a nuclear pore membrane ultraviolet sensitization device, which solves the problem of low nuclear pore membrane sensitization efficiency in the prior art.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a nuclear pore membrane ultraviolet sensitization device, comprising

[0007] An ultraviolet light source, the ultraviolet light emitted by the ultraviolet light source is used for sensitizing the nuclear pore membrane;

[0008] A working platform, used for placing or carrying the nuclear pore membrane;

[0009] The working platform comprises a circulation device, and the circulation device is used to drive the nuclear pore membrane to perform cyclic sensitization in a predetermined time period under the irradiation of the ultraviolet light source.

[0010] Optionally, the ultraviolet light source includes an ultraviolet LED lamp.

[0011] Optionally, the circulation device includes a conveyor belt, and the conveyor belt is connected to a power source.

[0012] Optionally, rollers are provided at both ends of the conveyor belt, and the power source drives the conveyor belt to rotate by driving the rollers.

[0013] Optionally, there are multiple ultraviolet LED lamps, and the multiple ultraviolet LED lamps are evenly arranged in an array to form a surface light source.

[0014] Optionally, a cover plate is provided at the ultraviolet light source.

[0015] Optionally, the ultraviolet light source is connected to a lifting mechanism, and the lifting mechanism is used to adjust the distance between the ultraviolet light source and the working platform.

[0016] Optionally, the ultraviolet light source is connected to a control component, and the control component is used to control the light intensity of the ultraviolet light source.

[0017] Optionally, a heat insulating member is provided between the ultraviolet light source and the working platform, and the heat insulating member is used to block part of the infrared radiation of the ultraviolet light source to the nuclear pore membrane on the working platform.

[0018] Optionally, the thermal insulation member is thermal insulation glass or a water tank.

[0019] The beneficial effects of the utility model are as follows: the utility model adopts an ultraviolet LED light source, which has a smaller wavelength broadening than a halogen lamp, a high energy conversion rate, and can obtain ultraviolet light of higher light intensity. The high-intensity ultraviolet light sensitization effect is better and faster, and the sensitization efficiency is greatly improved. At the same time, the ultraviolet LED lamp beads generate little heat and have a long service life. The ultraviolet light source is a surface light source composed of evenly arranged ultraviolet LEDs, has good light emission uniformity, and has a larger ultraviolet sensitization area than a halogen lamp.

[0020] Since the surface of the nuclear pore membrane may be deformed or annealed due to the heating of the UV lamp, the conveyor belt can transport the UV-sensitized nuclear pore membrane to an area without UV irradiation, where the heat can be well dissipated without additional heat dissipation.

[0021] The utility model can realize sensitization of several square meters of nuclear pore membrane at one time, improve the sensitization efficiency, and use a conveyor belt to periodically circulate the nuclear pore membrane with thicker thickness so that the nuclear pore membrane enters the ultraviolet lamp sensitization zone, thereby realizing long-term sensitization of the nuclear pore membrane.

[0022] In summary, the nuclear pore membrane ultraviolet sensitization device of the utility model has a good sensitization effect, can sensitize nuclear pore membrane products in batches, and promote the industrialization process of nuclear pore membrane product applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure in the embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure in the embodiment of the utility model;

[0025] Figure 3 It is a schematic diagram of the ultraviolet light source in the embodiment of the utility model.

[0026] The numbers or letters in the figure represent the names of the corresponding components or process names: 1. UV light source; 11. UV LED lamp; 2. Working platform; 3. Circulation device; 31. Conveyor belt; 311. Chain; 32. Power source; 33. Roller; 4. Cover plate; 5. Lifting mechanism; 6. UV lamp control box; 7. Transmission motor control box.

[0027] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The same or similar numbers correspond to the same or similar parts. The terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Nuclear pore membranes are made by using high-energy heavy ions to punch holes in polymer films, and then expanding the holes through physical or chemical methods. They are also called heavy ion microporous membranes. The hole expansion methods include UV sensitization, stretching, and chemical etching.

[0030] Nuclear pore membranes need to be prepared with cylindrical pores, conical pores, and conical rough surfaces by etching according to requirements. For the preparation of cylindrical pore nuclear pore membranes, the actual nuclear pore membrane products are double-conical pores, that is, the pores on the surface of the nuclear pore membrane are large, while the pores inside are small. The existence of taper will affect the following four aspects: (1) The small pore size in the nuclear pore membrane will restrict the performance of the nuclear pore membrane product. The small pore size in the nuclear pore membrane will reduce the gas, liquid or ion flux. (2) It is impossible to produce a nuclear pore membrane with a small pore size. The existence of the cone angle makes it impossible to prepare a nuclear pore membrane with a small pore size because the inner pore of the nuclear pore membrane with a small pore size has no etching through. (3) For a nuclear pore membrane with a conical pore, a smaller taper can achieve a conical pore with a larger aspect ratio, and it can also be used as a template to prepare nanocones with a large aspect ratio. (4) For over-etched nuclear pore membrane products, taper is an important factor affecting the surface roughness. When other conditions are the same, the smaller the taper, the greater the surface roughness.

[0031] The solution to the above problem in the prior art is ultraviolet sensitization, which can reduce the taper. The current ultraviolet method for small samples in the laboratory is to use an ultraviolet halogen lamp to irradiate a small sample with a diameter of several centimeters, which takes several hours. The disadvantage of this method is that it takes a long time, the irradiated sample is small, and the efficiency is not high. In addition, some thicker nuclear pore membranes have strong ultraviolet absorption, and it is impossible to achieve long-term sensitization of large-area nuclear pore membranes by interlacing multiple layers.

[0032] Embodiment 1:

[0033] This embodiment provides a nuclear pore membrane ultraviolet sensitization device, comprising an ultraviolet light source 1, the ultraviolet light emitted by the ultraviolet light is used for sensitizing the nuclear pore membrane; and a working platform 2, used for placing or carrying the nuclear pore membrane.

[0034] In one embodiment, the ultraviolet light source 1 is preferably composed of a plurality of ultraviolet LED lamps 11 evenly arranged to form a surface light source of a certain area, and the surface light source irradiates the nuclear pore membrane on the working platform 2 more evenly.

[0035] As a preferred embodiment, a plurality of ultraviolet light sources 1 may be arranged along the extending direction of the conveyor belt to achieve ultraviolet sensitization of a larger area at the same time and improve the sensitization efficiency.

[0036] In this embodiment, the working platform 2 includes a circulation device 3, and the circulation device 3 is used to drive the nuclear pore membrane to perform cyclic sensitization at a predetermined time period under the irradiation of the ultraviolet light source 1.

[0037] As a preferred embodiment, the circulation device 3 may include a conveyor belt 31, which is connected to a power source 32, and the power source 32 drives the conveyor belt 31 to transmit; in actual application scenarios, the nuclear pore membrane is placed on the conveyor belt 31, and as the power source 32 drives the conveyor belt 31 to transmit, the conveyor belt 31 is used to place and fix the nuclear pore membrane, so that the nuclear pore membrane and the conveyor belt 31 move forward synchronously, driving the nuclear pore membrane to cyclically enter and leave the ultraviolet sensitization area to achieve long-term sensitization, and the power source 32 is optional but not limited to a motor.

[0038] As an optional embodiment, the circulation device 3 may also include other rotating mechanisms, which can drive the nuclear pore membrane to perform a unidirectional forward or backward periodic cycle, which will not be described in detail or limited here.

[0039] In the further description of this embodiment, a cover plate 4 is provided at the ultraviolet light source 1. The cover plate 4 in this embodiment is used to limit the ultraviolet light irradiation area to the surface light source area composed of the ultraviolet LED lamp bead array, ensuring that the nuclear pore membrane is sensitized in the area with uniform ultraviolet light, and protecting the operator's eyes from being harmed by the reflected light on the surface of the nuclear pore membrane. The cover plate 4 is adjustable and arranged on both sides of the ultraviolet light source 1, and can be adjusted automatically or manually.

[0040] As a further description of this embodiment, the ultraviolet light source 1 is connected to a lifting mechanism 5, and the lifting mechanism 5 is used to adjust the distance between the ultraviolet light source 1 and the working platform 2. The lifting mechanism 5 can be set to an automatic or manual adjustment mode according to actual needs.

[0041] In this embodiment, the ultraviolet light source 1 is connected to a control component, and the control component is used to control the luminous intensity of the ultraviolet light source 1. Specifically, the control component can be an ultraviolet lamp control box 6, and the ultraviolet lamp control box 6 can linearly adjust the power of the ultraviolet lamp, and the power adjustment range is adjustable from 0 to 100%, providing adjustable light intensity for different ultraviolet sensitization requirements of the nuclear pore membrane.

[0042] In a further description of this embodiment, a heat insulating member is provided between the ultraviolet light source 1 and the working platform 2 , and the heat insulating member is used to reduce the infrared radiation of the ultraviolet light source 1 to the nuclear pore membrane on the working platform 2 .

[0043] Specifically, the thermal insulation component may be, but is not limited to, thermal insulation glass.

[0044] Specifically, the thermal insulation member may be, but is not limited to, a water tank.

[0045] The nuclear pore membrane ultraviolet sensitization device provided in this embodiment adopts an ultraviolet LED light source, which has a smaller wavelength broadening than a halogen lamp, a high energy conversion rate, and can obtain ultraviolet light of higher light intensity. The high-intensity ultraviolet light sensitization effect is better and faster, which greatly improves the sensitization efficiency. At the same time, the ultraviolet LED lamp 11 has low heat generation and a long service life. The ultraviolet light source 1 is a surface light source composed of multiple ultraviolet LED lamps 11 evenly arranged, with good light emission uniformity and a larger ultraviolet sensitization area than a halogen lamp.

[0046] Since the surface of the nuclear pore membrane may be deformed or annealed due to the heating of the ultraviolet lamp, the conveyor belt 31 can convey the ultraviolet-sensitized nuclear pore membrane to the area without ultraviolet irradiation, where the heat can be well dissipated without additional heat dissipation.

[0047] The nuclear pore membrane ultraviolet sensitization device of this embodiment can sensitize several square meters of nuclear pore membrane at one time, thereby improving the sensitization efficiency. For thicker nuclear pore membranes, a conveyor belt 31 is used to cyclically circulate the nuclear pore membrane into the ultraviolet lamp sensitization zone, thereby achieving long-term sensitization of the nuclear pore membrane.

[0048] In summary, the nuclear pore membrane ultraviolet sensitization device of this embodiment has a good sensitization effect, can sensitize nuclear pore membrane products in batches, and promote the industrialization process of nuclear pore membrane product applications.

[0049] Embodiment 2:

[0050] A nuclear pore membrane ultraviolet sensitization device is mainly characterized in that it comprises an ultraviolet LED lamp 11, cover plates 4 on both sides of the ultraviolet LED lamp 11, a bracket for adjusting the height below the ultraviolet LED lamp 11, a conveyor belt 31 for placing and fixing the nuclear pore membrane below the ultraviolet LED lamp 11, roller shafts 33 for fixing the conveyor belt 31 to rotate are arranged at both ends of the conveyor belt 31, a bracket for fixing the conveyor belt 31 and the roller shaft 33 is arranged below the conveyor belt 31, an ultraviolet lamp control box 6 and a transmission motor control box 7 and a motor for driving the conveyor belt 31 are placed on the bracket, and a chain 311 for transmission is arranged between the motor and the roller shaft 33.

[0051] The UV lamp control box 6 is connected to a power source, and 5 pieces of polyethylene terephthalate nucleopore membranes with a side length of 5 cm*5 cm are placed on the conveyor belt 31 in the center of the sensitization area. The conveyor belt 31 is not rotated, and the UV lamp power is adjusted to 80%. The UV lamp is turned on, and the sensitization time is 15 minutes.

[0052] The ultraviolet light source 1 is a rectangular surface light source composed of 0.8-1.2W ultraviolet LEDs arranged at equal intervals. The ultraviolet LED spacing is 1 cm, the ultraviolet lamp size is 12 cm wide and 60 cm long, a reflective cup is provided under each LED, the ultraviolet lamp wavelength is 365 nm, and the distance between the nuclear pore membrane sample and the ultraviolet lamp is 10 cm.

[0053] Embodiment 3:

[0054] The present embodiment provides a nuclear pore membrane ultraviolet sensitization device, which is preferably or optionally implemented on the basis of embodiment 1. The nuclear pore membrane ultraviolet sensitization device in the present embodiment comprises an ultraviolet light source 1, cover plates 4 on both sides of the ultraviolet light source 1, a bracket connected to the ultraviolet light source 1 for adjusting the height, a conveyor belt 31 for placing and fixing the nuclear pore membrane under the ultraviolet LED lamp 11, rollers 33 for fixing the rotation of the conveyor belt 31 are arranged at both ends of the conveyor belt 31, a bracket for fixing the conveyor belt 31 and the roller 33 is arranged under the conveyor belt 31, an ultraviolet lamp control box 6 and a transmission motor control box 7 and a motor 32 for driving the conveyor belt 31 are placed on the bracket, and a chain 311 for transmission is arranged between the motor 32 and the roller 33.

[0055] A layer of nucleoporosis membrane is wound and fixed on the conveyor belt 31, the transmission motor control box 7 is turned on, the transmission speed is set to 0.5m / minute, the conveyor belt 31 rotates slowly, the ultraviolet lamp power is set to 70%, and the ultraviolet lamp is turned on. At this time, the nucleoporosis membrane rotates with the conveyor belt 31, driving the nucleoporosis membrane to enter the ultraviolet sensitization area for sensitization, leaving the sensitization area and naturally cooling down as the nucleoporosis membrane advances, and then repeating the above process with the rotation of the conveyor belt 31, realizing the large-area and long-term sensitization of the nucleoporosis membrane.

[0056] The ultraviolet LED lamp 11 adopts a rectangular surface light source composed of ultraviolet LEDs with a power of 0.8-1.2W arranged at equal intervals. The ultraviolet LED spacing is 1cm, the ultraviolet lamp size is 12cm wide and 60cm long, and a reflective cup is provided under each LED. The wavelength of the ultraviolet lamp is 365nm. The thickness of the nuclear pore membrane is 125um, the width is 40cm, and the length is 2m of the polyimide nuclear pore membrane. The nuclear pore membrane is connected end to end and fixed on the conveyor belt 31, and the distance between the nuclear pore membrane sample and the ultraviolet lamp is 10cm.

[0057] The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "top", "bottom", "inside", "outside" and the like indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. In addition, if there are terms such as "first", "second", etc., they are only used for descriptive purposes, mainly to distinguish different devices, components or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components or components, and cannot be understood as indicating or implying relative importance.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A nuclear pore membrane ultraviolet sensitization device, characterized in that: It comprises an ultraviolet light source, and the ultraviolet light emitted by the ultraviolet light is used for sensitizing the nuclear pore membrane; A working platform, used for placing or carrying the nuclear pore membrane; The working platform includes a circulation device, and the circulation device is used to drive the nuclear pore membrane to perform cyclic sensitization at a predetermined time period under the irradiation of the ultraviolet light source; The ultraviolet light source is connected to a lifting mechanism, and the lifting mechanism is used to adjust the distance between the ultraviolet light source and the working platform; The ultraviolet light source is connected to a control component, and the control component is used to control the luminous intensity of the ultraviolet light source; A heat insulating member is provided between the ultraviolet light source and the working platform, and the heat insulating member is used to block part of the infrared radiation of the ultraviolet light source to the nuclear pore membrane on the working platform.

2. The nuclear pore membrane ultraviolet sensitization device according to claim 1, characterized in that: The ultraviolet light source includes an ultraviolet LED lamp.

3. The nuclear pore membrane ultraviolet sensitization device according to claim 2, characterized in that: The circulation device comprises a conveyor belt, and the conveyor belt is connected to a power source.

4. The nuclear pore membrane ultraviolet sensitization device according to claim 3, characterized in that: Roller shafts are arranged at both ends of the conveyor belt, and the power source drives the conveyor belt to transmit by driving the roller shafts to rotate.

5. The nuclear pore membrane ultraviolet sensitization device according to claim 2, characterized in that: There are multiple ultraviolet LED lamps, and the multiple ultraviolet LED lamps are evenly arranged to form an array to form a surface light source.

6. The nuclear pore membrane ultraviolet sensitization device according to claim 1, characterized in that: A cover plate is provided at the ultraviolet light source.

7. The nuclear pore membrane ultraviolet sensitization device according to claim 1, characterized in that: The heat insulating member is heat insulating glass or a water tank.

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