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UV-induced polymer surface modifying method

A surface modification and polymer technology, which is applied in the field of ultraviolet light-assisted treatment of polymer surfaces, can solve the problems in the field where saturated small molecule modified substances cannot be applied, the synthesis steps of modified molecules are cumbersome, and the grafting efficiency is not high. Simple structure, low cost, and improved surface hydrophilicity

Active Publication Date: 2009-08-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are some disadvantages: (1) It is only suitable for the application of vinyl modified substances, and cannot be applied to the field of saturated small molecules as modified substances; (2) The grafting efficiency is not high, and the modification effect is limited
The disadvantage is that the synthesis steps of modified molecules are cumbersome, which is not conducive to simple operation, resulting in relatively high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] CeCl 3 / HCl is used as the catalytic initiation system, D-fructose is the modified substance, and the modified solution is prepared with deionized water as the solvent. The concentration of D-fructose is 0.2mol / L, the concentration of hydrochloric acid is 1.0mol / L, CeCl 3 The concentrations are 0.2mol / L, 0.4mol / L and 0.6mol / L, respectively.

[0034] With BOPP film as the upper and lower membranes, they were made with the above-mentioned three different concentration modification solutions as follows: Figure 1-2 Reactor with "sandwich" structure shown. In a normal temperature environment, use Picture 1-1 The device shown is used for surface modification treatment with a power of 1000w and a light intensity of 12000μw / cm at λ=254nm 2 The high-pressure mercury lamp has an illumination time of 12.5 minutes. After the treatment, the BOPP film is first rinsed with a large amount of water, then soaked in deionized water, and washed three times with stirring for 20 minutes, and t...

Embodiment 2

[0039] CeCl 3 / HCl is used as the catalytic initiation system, D-fructose is the modified substance, and the modified solution is prepared with deionized water as the solvent. The concentration of D-fructose is 0.2mol / L, CeCl 3 The concentration is 0.4mol / L, and the concentration of hydrochloric acid is 0.1mol / L and 1.0mol / L, respectively.

[0040] Other methods are the same as in Example 1.

[0041] The air / water contact angle measurement results of the modified BOPP film are shown in Table 2.

[0042] Table 2 Changes in surface hydrophilicity of modified BOPP films under different hydrochloric acid concentrations

[0043] Concentration of hydrochloric acid (mol / L) 0.1 1.0 Water contact angle before modification Water contact angle after modification 64.2° 43.6° 107.8°

Embodiment 3

[0045] Respectively use monosaccharides (D-fructose, L-sorbose, D-glucose or D-galactose) as modified substances, and CeCl 3 / HCl is used as the catalytic initiation system, and the modified solution is prepared with deionized water as the solvent. The concentration of monosaccharide is 0.2mol / L, the concentration of CeCl3 is 0.4mol / L, and the concentration of hydrochloric acid is 1.0mol / L.

[0046] Other methods are the same as in Example 1.

[0047] The air / water contact angle measurement results of the modified BOPP film are shown in Table 3.

[0048] Table 3 Changes in surface hydrophilicity of BOPP films modified by different monosaccharides

[0049]

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Abstract

This invention relates a polymer's surface modification method by the UV-light induction. In the invention, the acidic water solution of trivalent cerium is used as catalyze-initiation system. Under the condition of UV-light, the superficial light coincidence reaction of saturated multifunctional group of the polymer was initiated, or the superficial light graft polymer of the unsaturated monomer was also initiated. So the superficial performance is improved. The method in this invention is fit for surface modification of many polymers, including polyolefine, aromatic polymer, homopolymer or interpolymer of latex, and other homopolymers or interpolymers. Otherwise, the method has no especial demand of the polymer's shape.

Description

Technical field [0001] The present invention relates to a novel method for assisting treatment of polymer surface with ultraviolet light, so as to improve the surface performance of polymer. Background technique [0002] Because of the low surface free energy and chemical inertness of the surface, the application of polymer materials in the field of surface and interface is severely limited. By improving the surface properties of organic polymer materials, such as adhesion with other organic, inorganic, and metal materials, interface compatibility, dyeability, antistatic properties and biocompatibility, etc., the polymer can be greatly expanded in printing , Dyeing, bonding, barrier, biology and metal deposition and other special fields. For example, before printing, industrial packaging films such as PE, PP, PVC, PET, etc. are usually corona treated on the surface to increase the surface free energy, so as to achieve the purpose of printing patterns on the surface of these packa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/18
Inventor 杨万泰黄振华孙玉凤白耀文
Owner BEIJING UNIV OF CHEM TECH