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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 of fields where saturated small molecule modified substances cannot be applied, complicated synthesis steps of modified molecules, and low grafting efficiency, etc. Simple structure, low cost, and improved surface hydrophilicity

Active Publication Date: 2007-06-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • UV-induced polymer surface modifying method

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Experimental program
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Effect test

Embodiment 1

[0033] with CeCl 3 / HCl was used as the catalytic initiation system, D-fructose was used as the modified substance, and deionized water was used as the solvent to prepare the modified solution. Wherein 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 the BOPP film as the upper and lower membranes, and the above-mentioned three different concentrations of modification solutions, a "sandwich" structure reactor as shown in Figure 1-2 is made. In a normal temperature environment, use the device shown in Figure 1-1 to carry out surface modification treatment, with a power of 1000w, and a light intensity at λ=254nm of 12000μw / cm 2 High-pressure mercury lamp, the illumination time is 12.5 minutes. After the treatment, the BOPP membrane is first rinsed with a large amount of water, then soaked in deionized water, washed 3 times for 20 minutes ea...

Embodiment 2

[0039] with CeCl 3 / HCl was used as the catalytic initiation system, D-fructose was used as the modified substance, and deionized water was used as the solvent to prepare the modified solution. Wherein 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 with embodiment 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 film under different hydrochloric acid concentrations

[0043] Hydrochloric acid concentration (mol / L)

Embodiment 3

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

[0046] Other methods are with embodiment 1.

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

[0048] Table 3 Changes of surface hydrophilicity of different monosaccharide modified BOPP films

[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 invention relates to a novel method for assisted treatment of polymer surface by ultraviolet light, so as to improve the surface performance of the polymer. Background technique [0002] Due to the low surface free energy and the chemical inertness of the surface, the application of polymer materials in the field of surface and interface is seriously limited. By improving the surface properties of organic polymer materials, such as adhesion with other organic, inorganic and metal materials, interfacial compatibility, dyeability, antistatic and biocompatibility, etc., the printing of polymers can be greatly expanded. , dyeing, bonding, barrier, biological and metal deposition and other special fields of application. For example, corona treatment is usually performed on the surface of PE, PP, PVC, PET and other industrial packaging films before printing to increase the surface free energy, so as to achieve the purpose of printing patterns on the sur...

Claims

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Application Information

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