Siphon for a glass adsorption column and use

Abstract

The present application relates to B01D11 / 02 technical field, specifically relates to a kind of siphon for glass adsorption column and application.A kind of siphon for glass adsorption column, including plastic tube, plug head.In the present application, by the surface treatment of polytetrafluoroethylene film, the adhesion between polytetrafluoroethylene film and silica gel plug is improved, and the sealing property of glass adsorption column siphon is improved.Polytetrafluoroethylene film treated by the present application is wound with rubber plug without needing to smear silicon grease, and the combination with rubber plug is good and not easy to fall off.The present application can improve the sealing property of siphon and glass adsorption column, reduce production cost, and improve economic benefit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of B01D11 / 02, and particularly relates to a siphon for a glass adsorption column and application. BACKGROUND

[0002] A low-temperature distillation / reflux extraction device is disclosed in Chinese patent with patent application number CN200910046132.7, which adopts a siphon to communicate with the bottom of the extraction container cavity, but the problem of whether the siphon can have a good sealing property with the extraction container for a long time is not solved.

[0003] A jet flow extraction machine is disclosed in Chinese patent with patent application number CN202120315383.7, which adopts a siphon to apply in the field of extraction technology, but the problem of whether the siphon can have a good sealing property with the extraction container for a long time is not solved.

[0004] In the glass solid phase extraction experiment, a glass solid phase extraction tube needs to be used, but the matching of the glass solid phase extraction tube with the existing siphon on the market is poor, therefore, the main technical problem to be solved at present is to provide a siphon which can improve the matching of the siphon with the glass solid phase extraction tube and improve the sealing effect in the solid phase extraction tube. SUMMARY

[0005] In order to solve the above problems, the present application provides a siphon for a glass adsorption column, which comprises a plastic tube and a plug.

[0006] Preferably, the material of the plug is selected from one or more of ethylene-propylene-diene rubber, silica gel, polytetrafluoroethylene, polyamide, polyethylene and polypropylene.

[0007] In a preferred technical solution, the material of the plug is silicone rubber.

[0008] In a preferred technical solution, the material of the plug is polytetrafluoroethylene.

[0009] Preferably, when the material of the plug is silicone rubber, the plug is coated with a plastic film in application.

[0010] Preferably, the plastic film is selected from one or more of polyethylene film, polypropylene film, polytetrafluoroethylene film and polystyrene film.

[0011] Preferably, the processing method of the polytetrafluoroethylene film comprises the following steps:

[0012] S1. using a plasma treatment device to perform surface treatment on the polytetrafluoroethylene film;

[0013] S2. adding the polytetrafluoroethylene film into an organic solution for treatment and then drying.

[0014] Preferably, the polytetrafluoroethylene film is soaked in the organic solution at 30-40℃ for 30-100min.

[0015] Preferably, the polytetrafluoroethylene film is soaked in the organic solution at 33-38℃ for 50-80min.

[0016] In a preferred technical solution, the polytetrafluoroethylene film is soaked in the organic solution at 38℃ for 65min.

[0017] Preferably, the organic solution comprises one or more of an acrylic acid solution, a silane acrylic acid solution, and a sodium naphthalene solution.

[0018] In a preferred technical solution, the organic solution comprises, by mass percentage, 30-50% of an acrylic acid solution, 3-5% of ethylene glycol, and the balance of water.

[0019] The average molecular weight of the acrylic acid solution is 7000-13000, and as specific examples, the acrylic acid solution can be listed as Hanhua acrylic resin liquid HW-6, SL-112, S-812, and S-612.

[0020] The average molecular weight of the Hanhua acrylic resin liquid HW-6 is 7200, and the manufacturer is Guangzhou Wenjia Chemical Co., Ltd.

[0021] The average molecular weight of the Hanhua acrylic resin liquid SL-112 is 12000, and the manufacturer is Guangzhou Wenjia Chemical Co., Ltd.

[0022] The average molecular weight of the Hanhua acrylic resin liquid S-812 is 12800, and the manufacturer is Guangzhou Wenjia Chemical Co., Ltd.

[0023] The average molecular weight of the Hanhua acrylic resin liquid S-612 is 9500, and the manufacturer is Guangzhou Wenjia Chemical Co., Ltd.

[0024] In order to improve the problem that the polytetrafluoroethylene film is not easy to fall off on the plug head of silicone rubber material, the present inventors found that the acrylic acid solution with a molecular weight of 7000-13000, especially the acrylic acid solution with a molecular weight of 9500, can interact with the free radicals on the polytetrafluoroethylene molecular chain under the action of ethylene glycol when soaking the polytetrafluoroethylene film, thereby generating a certain binding force, but when the molecular weight of the acrylic acid in the acrylic acid solution is too high, the wear resistance and corrosion resistance of the surface of the polytetrafluoroethylene film will be reduced.

[0025] Preferably, the polytetrafluoroethylene film is treated by the plasma treatment device for 20-100s, and the plasma treatment device has a power greater than 80W.

[0026] Preferably, the polytetrafluoroethylene membrane is treated by the plasma treatment device for 30-80s, and the plasma treatment device has a power greater than 100W.

[0027] In a preferred embodiment, the polytetrafluoroethylene membrane is treated by the plasma treatment device for a time selected from the group consisting of 30s, 35s, 40s, 45s, 50s, 55s, 60s, 65s, 70s, 75s, and 80s.

[0028] Preferably, the plasma treatment device uses a treatment gas selected from one or more of nitrogen, oxygen, and argon.

[0029] Preferably, the plasma treatment device has a treatment gas flow rate of 15-50cm 3 / min.

[0030] In a preferred embodiment, the plasma treatment device has a treatment gas flow rate selected from the group consisting of 15cm 3 / min, 18cm 3 / min, 21cm 3 / min, 24cm 3 / min, 27cm 3 / min, 31cm 3 / min, 35cm 3 / min, 38cm3 / min, 41cm3 / min, 45cm3 / min, 48cm3 / min, and 50cm3 / min.

[0031] In order to improve the polytetrafluoroethylene membrane so that it does not easily fall off the stopper when in use, the present inventors treated the polytetrafluoroethylene membrane using a plasma treatment device, the plasma treatment device had a power of 280W, used nitrogen, and had a gas flow rate of 15-50cm 3 / min, and the treatment time was 30-80s. This increased the adhesion of the polytetrafluoroethylene membrane to the stopper, improved the sealing of the glass adsorption column and the siphon, and the present inventors found that the possible reason for this was that after the nitrogen plasma treatment, new free radicals were formed on the surface of the polytetrafluoroethylene membrane, which interacted with the functional groups contained in the acrylic acid in the organic solution, formed a certain binding force, improved the inertness of the surface of the polytetrafluoroethylene membrane, improved the adhesion of the polytetrafluoroethylene membrane to the stopper, and improved the sealing effect of the siphon. The present inventors also found that if the power of the plasma treatment device was too high, cracks would appear on the surface of the polytetrafluoroethylene membrane, which would affect the formation of a uniform interaction network of the functional groups contained in the acrylic acid on the polytetrafluoroethylene membrane, the adhesion of the polytetrafluoroethylene membrane to the stopper would be reduced, and the sealing effect of the siphon would be reduced.

[0032] The inventor found that when the gas flow rate of nitrogen is too low, the ionization degree of nitrogen in the plasma is increased, the number of high-energy electrons is increased, the crack-like structure on the surface of the polytetrafluoroethylene film is increased, the functional groups contained in the acrylic acid in the organic solution are affected to form a uniform network on the polytetrafluoroethylene film, and the adhesion of the polytetrafluoroethylene film to the plug is reduced, thereby reducing the sealing effect of the siphon tube.

[0033] The inventor found that when the plasma treatment device has a long processing time, the crack-like structure on the surface of the polytetrafluoroethylene film is more obvious, the acrylic acid solution and the free radicals on the surface of the polytetrafluoroethylene film are affected to combine, thereby affecting the interaction with the functional groups contained in the acrylic acid, affecting the adhesion of the polytetrafluoroethylene film to the plug, and reducing the sealing effect of the siphon tube.

[0034] The second aspect of the present application provides a siphon tube for a glass adsorption column in a glass solid phase extraction tube.

[0035] Advantages

[0036] In the present application, the surface of the polytetrafluoroethylene film is treated to improve the adhesion between the polytetrafluoroethylene film and the silica gel plug, and the sealing performance of the glass adsorption column siphon tube is improved.

[0037] The polytetrafluoroethylene film treated by the present application is wound with the rubber plug without the need for applying silicone grease, and the combination with the rubber plug is good and not easy to fall off.

[0038] In the present application, the polytetrafluoroethylene film is soaked in an acrylic acid solution with a molecular weight of 7000-13000, which can improve the problem that the polytetrafluoroethylene film is not easy to fall off on the plug made of silicone rubber material.

[0039] In the present application, nitrogen is used for plasma treatment, which can improve the adhesion between the polytetrafluoroethylene film and the plug, and improve the sealing performance of the glass adsorption column and the siphon tube.

[0040] The present application can improve the sealing performance of the siphon tube and the glass adsorption column, reduce production costs, and improve economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 A structural diagram of a siphon tube for a glass adsorption column is provided.

[0042] Figure 2 A structural diagram of a siphon tube for a glass adsorption column is provided.

[0043] Figure 1 Plastic tube 1, plug 2.

[0044] Figure 2Middle: plastic tube 1, plug 2, plug top 3, first groove 4, second groove 5. DETAILED DESCRIPTION

[0045] Example 1

[0046] A siphon for a glass adsorption column, comprising a plastic tube 1, a plug 2.

[0047] The Figure 1 A structural diagram of a siphon for a glass adsorption column is provided.

[0048] The material of the plug is silicone rubber.

[0049] The outer layer of the plug is coated with a plastic film when in use.

[0050] The plastic film is a polytetrafluoroethylene film.

[0051] The processing method of the polytetrafluoroethylene film includes the following steps:

[0052] S1. Surface treatment of the polytetrafluoroethylene film using a plasma treatment device;

[0053] S2. Soak the polytetrafluoroethylene film in an organic solution at 38℃ for 65 minutes, then dry it in a vacuum drying oven at 60℃ for 50 minutes.

[0054] The organic solution contains 45% acrylic acid solution, 5% ethylene glycol, and the rest water by mass percentage.

[0055] The acrylic acid solution is S-612 from Hanhua Acrylic Resin Liquid, purchased from Guangzhou Wenjia Chemical Co., Ltd.

[0056] The polytetrafluoroethylene film is treated by the plasma treatment device for 55 seconds, and the plasma treatment device has a power of 280W.

[0057] The plasma treatment device uses nitrogen as the treatment gas.

[0058] The flow rate of the treatment gas of the plasma treatment device is 35 cm 3 / min.

[0059] The embodiment provides an application of a siphon for a glass adsorption column in a glass solid phase extraction tube.

[0060] Example 2

[0061] A siphon for a glass adsorption column, comprising a plastic tube 1, a plug 2.

[0062] The material of the plug is polytetrafluoroethylene.

[0063] The plug 2 comprises a plug top 3, a first groove 4, and a second groove 5.

[0064] The first groove 4 and the second groove 5 are in the shape of a circular arc.

[0065] Figure 2 A structural schematic diagram of the siphon in this embodiment is provided.

[0066] This embodiment provides an application of a siphon for a glass adsorption column in a glass solid phase extraction tube.

[0067] Embodiment 3

[0068] A siphon for a glass adsorption column comprises a plastic tube 1 and a plug 2.

[0069] The plug 2 comprises a plug top 3, a first groove 4, and a second groove 5. Figure 1 A structural schematic diagram of the siphon for a glass adsorption column is provided.

[0070] The material of the plug is silicone rubber.

[0071] The plug is coated with a plastic film when applied.

[0072] The plastic film is a polytetrafluoroethylene film.

[0073] The processing method of the polytetrafluoroethylene film comprises the following steps:

[0074] S1. Surface treatment of the polytetrafluoroethylene film using a plasma treatment device;

[0075] S2. The polytetrafluoroethylene film is soaked in an organic solution at 38℃ for 65 minutes and then dried in a vacuum drying oven at 60℃ for 50 minutes.

[0076] The organic solution comprises, by mass percentage, 45% of an acrylic acid solution, 5% of ethylene glycol, and the balance of water.

[0077] The acrylic acid solution is a type of Hanhua acrylic resin liquid S-612 from Guangzhou Wenjia Chemical Co., Ltd.

[0078] The polytetrafluoroethylene film is treated by the plasma treatment device for 150 seconds, and the treatment power of the plasma treatment device is 280W.

[0079] The treatment gas used by the plasma treatment device is nitrogen.

[0080] The flow rate of the treatment gas of the plasma treatment device is 5cm 3 / min.

[0081] The embodiment provides application of a siphon for a glass adsorption column in a glass solid phase extraction tube.

[0082] Embodiment 4

[0083] A siphon for a glass adsorption column comprises a plastic tube 1 and a plug 2.

[0084] The siphon for the glass adsorption column is provided in the glass solid phase extraction tube. Figure 1 A structural diagram of the siphon for the glass adsorption column is provided.

[0085] The plug is made of silicone rubber.

[0086] The plug is coated with a plastic film when applied.

[0087] The plastic film is a polytetrafluoroethylene film.

[0088] The embodiment provides application of a siphon for a glass adsorption column in a glass solid phase extraction tube.

[0089] Performance test

[0090] 1. Sealing test

[0091] Test method: the siphon for the glass adsorption column provided in Embodiments 1-4 is connected with the glass solid phase extraction tube, a vacuum pump is used for vacuumizing, and vacuum pressure values of the vacuum pump used in solid phase extraction experiments for 5 days, 10 days and 20 days are recorded, and test results are shown in Table 1.

[0092] Table 1

[0093] Example 5 days 10 days 20 days Example 1 -0.1 MPa -0.1 MPa -0.1 MPa Example 2 -0.1 MPa -0.1 MPa -0.1 MPa Example 3 -0.08 MPa -0.06 MPa -0.04 MPa Example 4 -0.06 MPa -0.02 MPa /

Claims

1. A siphon tube for a glass adsorption column, characterized in that: It comprises a plastic tube (1) and a plug (2); The plug is made of silicone rubber; The plug is covered with a plastic film when in use; The plastic film is a polytetrafluoroethylene film; The method for treating the polytetrafluoroethylene film comprises the following steps: S1. Surface treatment of polytetrafluoroethylene membrane using plasma treatment equipment; S2. Soak the polytetrafluoroethylene membrane in an organic solution at 38°C for 65 minutes and then dry it in a vacuum drying oven at 60°C for 50 minutes. Calculated by mass percentage, the organic solution comprises 45% acrylic acid solution, 5% ethylene glycol, and the balance water; The model of the acrylic acid solution is Hanhua acrylic resin liquid S-612; The polytetrafluoroethylene film is treated by the plasma treatment equipment for 55 seconds, and the treatment power of the plasma treatment equipment is 280W; The processing gas used by the plasma processing equipment is nitrogen; The processing gas flow rate of the plasma processing equipment is 35 cm3 / min.

2. The siphon tube for a glass adsorption column according to claim 1, characterized in that: The plug is made of polytetrafluoroethylene; The plug (2) comprises a plug top (3), a first groove (4), and a second groove (5); The first groove (4) and the second groove (5) are in the shape of an arc.

3. Use of the siphon tube for a glass adsorption column according to any one of claims 1 to 2 in a glass solid phase extraction tube.

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