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Method and device for real time monitoring surface initiating polymeric membrane growth

A surface-initiated, polymer film technology, applied in measurement devices, mechanical devices, analysis of materials, etc., can solve problems affecting practical applications, poor repeatability of experience curves, etc., to facilitate real-time monitoring, wide industrial applications, and avoid uncertainty. sexual effect

Inactive Publication Date: 2008-08-06
北京宏荣博曼生物科技有限责任公司
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  • Application Information

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Problems solved by technology

This is because in the initiation stage of SIP, even under the same conditions, there are still great differences between different reactions, especially for organic solvents and systems without deactivators, so at this stage, the traditional point-by-point method is used to obtain The repeatability of the empirical curve is very poor, which affects the practical application of the method

Method used

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  • Method and device for real time monitoring surface initiating polymeric membrane growth
  • Method and device for real time monitoring surface initiating polymeric membrane growth
  • Method and device for real time monitoring surface initiating polymeric membrane growth

Examples

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Embodiment 1

[0036] Example 1, using the method of the present invention to monitor the polymerization of oligoethylene glycol methacrylate initiated by the surface in real time

[0037] The liquid storage tank 1, the sensor chamber 2 of the quartz crystal microbalance and the peristaltic pump 4 are sequentially connected with pipelines, and the device for real-time monitoring of polymer film growth induced by the surface of the present invention is installed.

[0038] According to the method reported in literature 5: Bain, C.D.; Evall, J.; Whitesides, G.M.J.Am.Chem.Soc. Initiator for the polymerization of acrylates. The specific steps are: the gold-plated surface of the QCM chip is cleaned by ozone ultraviolet rays with a UV / Ozone cleaning machine to remove surface impurities; immediately after cleaning, it is immersed in an initiator bromoisobutyric acid-ω-mercaptoundecane with a concentration of 1 mmol. ω-mercaptoundecyl bromoisobutyrate in ethanol solution overnight to obtain a QCM ch...

Embodiment 2

[0048] Example 2, using the method of the present invention to monitor the polymerization of other monomers initiated by the surface in real time

[0049] The method of the present invention is equally applicable to other monomers, and within the limit thickness of 50nm, the experimental results obtained are as follows: Figure 6 shown and listed in Table 1.

[0050] When the ellipsometer data model is fitted to the film thickness, the Cauchy model is used for the self-assembled single-layer QCM chip of the initiator, and its (An, Bn) is (1.45, 0.01), and the model provided by the manufacturer is used for PMMA.

[0051] Table 1, k value depends on the monomer

[0052]

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PUM

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Abstract

The invention relates to method for detecting the growth of macromolecule membrane induced at surface real-time and a relative equipment, which utilizes quartz crystal micro balance to detect the growth of macromolecule membrane induced at surface real-time in liquid condition. The method comprises arranging a QCM chip with inducer grown at surface into a QCM sensor chamber, feeding incomplete reaction solution to reach stable starting base line, feeding complete reaction solution and recording the frequency F detected by the QCM and the frequency change delta F of converted complete reaction solution, using ellipse polarizing equipment to measure and analyze the thickness of macromolecule membrane grown on the chip to make a curvature relative to the frequency change delta F-membrane thickness. The invention can accurately and simply control the macromolecule reaction induced at surface to control the thickness of surface modification membrane of 10<-10>m.

Description

technical field [0001] The invention belongs to the field of surface polymer synthesis and modification, and in particular relates to a method and a device for real-time monitoring of surface-induced polymer film growth. Background technique [0002] Surface-Initiated Polymerization (SIP for short) is a new type of surface modification ("grafting from", ie "grafting") method. Compared with the traditional grafting method ("grafting to", "grafting to"), the SIP method is less troubled by concentration gradient obstacles, so it can be used to prepare higher densities (0.6 strands / nm 2 ) and thicker films (greater than 100nm), thus for densities (>0.06 chains / nm 2 ) of the polymer layer and the surface properties can be further studied and better utilized. For example, as a controllable polymer polymerization method, Surface Initiated Atom Transfer Radical Polymerization (Surface Initiated Atom Transfer Radical Polymerization, hereinafter referred to as SI-ATRP) is initiat...

Claims

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Application Information

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IPC IPC(8): C08J5/00C08F20/10G01N19/00
Inventor 马雄明
Owner 北京宏荣博曼生物科技有限责任公司
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