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Photoinduction modifying method for COC

A cyclic olefin copolymer and light-induced technology, which is applied in the field of light-induced modification of cyclic olefin copolymers, and can solve the problems of complicated and time-consuming operation.

Inactive Publication Date: 2013-04-10
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of complex and time-consuming operation when the existing light-induced modification improves the hydrophilicity of cycloolefin copolymers, and to provide a simple and fast method for photo-induced modification of cycloolefin copolymers

Method used

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  • Photoinduction modifying method for COC
  • Photoinduction modifying method for COC
  • Photoinduction modifying method for COC

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Cut the commercially available COC sheet into 1cm×1cm size, clean it, clamp it with a glass slide, and heat press it in an oven at 135-160°C for 20-30min until it becomes transparent. Put 2 mL of bromine aqueous solution (volume percent concentration: 1%) into the weighing bottle, put the autoclaved COC chips into the bromine water, cover the weighing bottle with a quartz chip, and then set the device at 5.3 mW / cm 2 The light-induced bromination reaction is carried out under the irradiation of ultraviolet light, and the light time is 2-6min, such as figure 1 As shown, bromine-modified COC sheets were obtained.

Embodiment 2

[0027] The bromine-modified COC sheet of Example 1 was completely immersed in 4ml of 1mol / L sodium hydroxide solution, heated in an oven at 80°C for 50min, and rinsed with distilled water to obtain bromine-sodium hydroxide modified COC sheet. figure 2 It is the effect of light time on the contact angle of bromine-sodium hydroxide modified COC sheets with water during bromine modification. The results show that with the increase of light time, the contact angle decreases significantly, which shows that the modified COC The hydrophilicity of the sheet can be significantly enhanced.

Embodiment 3

[0029] The bromine-modified COC sheet of Example 1 was immersed in 4ml of ethylenediamine, heated at 80°C for 30min, and rinsed with distilled water to obtain bromine-ethylenediamine-modified COC sheet.

[0030] The influence of different modification methods on the contact angle between COC sheet and water:

[0031]

[0032] The light time of different modification methods is 5min, and the hydrophilicity of the modified COC sheet is improved.

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Abstract

The invention discloses a photoinduction modifying method for COC (Cycloalkenes Copolymer), which comprises the following steps that the COC is contacted with bromine water; a contact surface conducts a photoinduction brominating reaction under UV(Ultraviolet) irradiation to form a bromine modified COC; and the bromine modified COC can further react with a sodium hydroxide solution or ethylene diamine to form the modified COC with better performances. With the adoption of the modifying method, a uniform and continuous hydrophilic coating can be generated on the surface of the COC; and a COC chip modified by bromine-sodium hydroxide has a good separating effect on sodium fluorescein and amino acid and can reduce the adsorption of protein on the internal surface of a COC channel.

Description

technical field [0001] The invention belongs to the field of organic polymer materials, and in particular relates to a method for light-induced modification of cycloolefin copolymers. Background technique [0002] Among a wide variety of polymer materials, cyclic olefin copolymer (COC) is a relatively new thermoplastic engineering polymer plastic based on cyclic olefin monomer and ethylene. Due to its low price and excellent physical properties, its application fields It has been greatly expanded in recent years. [0003] Although COC has the advantages of high light transmission, low fluorescent background, low air permeability, high mechanical strength, easy processing, acid and alkali resistance, and good biocompatibility, like other plastics, the surface of COC It has strong hydrophobicity and is easy to adsorb biomolecules such as proteins, which limits its application in the biochemical field. Therefore, its surface must be treated before use to improve the hydrophil...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08L45/00C08L23/08
Inventor 蒲巧生郭锦秀丁辉
Owner LANZHOU UNIVERSITY
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