Making method for ionic migration spectrometer semipermeable membrane
An ion mobility spectrometer and a production method technology, which are applied in the directions of semipermeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problem that semipermeable membranes cannot have both high temperature resistance and hydrophobicity at the same time, and achieve performance stability. Superior, low risk of failure, low cost effect
Inactive Publication Date: 2016-10-12
THE THIRD RES INST OF MIN OF PUBLIC SECURITY
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[0009] Aiming at the problem that the existing semipermeable membrane cannot have both high temperature resistance and hydrophobicity at the same time, the purpose of the present invention is to provide a manufacturing process for a semipermeable membrane for ion mobility spectrometers, so as to produce a semipermeable membrane that can well balance hydrophobicity and high temperature resistance. semipermeable membrane
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[0030] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.
[0031] The performance of the semi-permeable membrane at the injection port of the ion mobility spectrometer must meet the following two points: first, it can withstand high temperatures above 150°C, and second, it has the characteristics of hydrophobic and lipophilic.
[0032] Accordingly, the inventor discovered through a lot of research and creative work:
[0033] Using methyl silicone rubber as a component of the semipermeable membrane will enable the semipermeable membrane to have excellent high temperature resistance performance, and can withstand high temperatures above 150°C.
[0034] Furthermore, when the contact angle of the semipermeable membrane is about 140°, the semipermeable membrane will have good hydrophobic properties, so that ...
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The invention discloses a method for making a semipermeable membrane for an ion mobility spectrometer. In the method, organosilicon rubber is used as a prepolymer, and under the catalysis of a Pt-based catalyst, a crosslinking reaction is used to make a double bond on the prepolymer molecule It reacts with the active hydrogen of the corresponding crosslinking agent to obtain a three-dimensional crosslinked silicone rubber to form a semipermeable membrane. The semi-permeable membrane based on the above-mentioned scheme has the advantages of superior performance stability, higher product reliability, and less failure risk; the semi-permeable membrane thus produced has the characteristics of both hydrophobicity and high temperature resistance, and is completely To meet the needs of use.
Description
technical field [0001] The invention relates to an ion mobility spectrometer, in particular to a semipermeable membrane on the ion mobility spectrometer. Background technique [0002] Ion Mobility Spectrometry (IMS, Ion Mobility Spectrometry) is a trace detection technology that uses the difference in mobility of charged particles in an electric field after ionization of substance molecules to achieve sample identification. An important technology of the ion mobility spectrometer is to add a semipermeable membrane to the instrument inlet, which can not only block the dust in the air, but more importantly, it can eliminate the interference of water molecules in the environment on the detection process, and selectively pass through organic matter. Molecules, improve the resolution of instrument detection ion mobility spectrometry. [0003] The performance of the semi-permeable membrane at the injection port must meet the following two points: first, it can withstand high temp...
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Login to View More IPC IPC(8): B01D67/00B01D71/70B01D69/12G01N27/62
CPCB01D69/125B01D71/70B01D2321/40B01D2323/30B01D2325/32B01D2325/38G01N27/62
Inventor 疏天民成云飞洪利军温亚珍
Owner THE THIRD RES INST OF MIN OF PUBLIC SECURITY