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Method for enhancing photosensitivity of PVP and cross-linking method

A photosensitive, laser technology, used in laser welding equipment, manufacturing tools, welding/welding/cutting items, etc., can solve problems such as harm to the human body, increase the experimental cost and operation difficulty, and achieve the effect of enhancing photosensitivity

Active Publication Date: 2020-08-21
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultraviolet light has the disadvantages of being harmful to the human body. At the same time, the operator needs to have a certain degree of protection measures during the experiment using ultraviolet light source, which will undoubtedly increase the cost of the experiment and the difficulty of operation.

Method used

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  • Method for enhancing photosensitivity of PVP and cross-linking method
  • Method for enhancing photosensitivity of PVP and cross-linking method
  • Method for enhancing photosensitivity of PVP and cross-linking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of iron ion / PVP mixed solution:

[0036] Dissolve 0.24g of ferric nitrate nonahydrate in 2mL of deionized water, stir to dissolve, and ultrasonicate for half an hour to obtain solution A; dissolve 0.125g of polyvinylpyrrolidone in 2mL of deionized water, stir to dissolve, and ultrasonicate for half an hour to obtain Solution B: Mix solution A and solution B, and continue ultrasonication for half an hour to obtain a mixed solution of iron ions / PVP.

Embodiment 2

[0038] Preparation of copper ion / PVP mixed solution:

[0039] Dissolve 0.14g of copper nitrate trihydrate in 2mL of deionized water, stir to dissolve, and ultrasonicate for half an hour to obtain solution A; dissolve 0.125g of polyvinylpyrrolidone in 2mL of deionized water, stir to dissolve, and ultrasonicate for half an hour to obtain Solution B: Mix solution A and solution B, and continue ultrasonication for half an hour to obtain a copper ion / PVP mixed solution.

Embodiment 3

[0041] Preparation of iron ion / PVP composite film: Take 1-2 drops of the iron ion / PVP mixed solution prepared in Example 1 and apply it on a clean glass slide, first rotate it at 500rpm for 9s with a spinner, and then rotate it at 1600rpm for 30s , so that the solution is evenly spread on the glass slide, and then the glass slide is heated at 100 degrees in a constant temperature box for 10 minutes, that is.

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Abstract

The invention relates to a method for enhancing the photosensitivity of PVP (Polyvinyl Pyrrolidone) by doping metal ions in the PVP for coordination compounding and a laser-induced PVP cross-linking method. Iron ions or copper ions are added into PVP for coordination compounding, so that PVP is absorbed in a near ultraviolet region or a visible light region, an energy threshold value required by across-linking reaction of PVP is reduced, and laser-induced cross-linking is carried out on PVP with enhanced photosensitivity. According to the invention, the requirements for ultraviolet light source and high energy required for inducing a PVP polymer to generate cross-linking curing reaction at present are broken through, and a new way is opened up for the application of PVP.

Description

technical field [0001] The invention relates to a method for enhancing the photosensitivity of PVP and a crosslinking method, in particular to a method for doping metal ions in a PVP polymer for coordination and compounding to enhance its photosensitivity and a laser-induced PVP crosslinking method. Background technique [0002] Polyvinylpyrrolidone (PVP) has the characteristics of low toxicity, biocompatibility, strong complexation ability and good film-forming property. It is a very important functional polymer in industrial life. It is widely used in cosmetics, pharmaceutical and pesticide intermediates, food additives, photosensitive electronic materials, and tackifiers. At the same time, PVP also has good solubility, and its aqueous solution has good film-forming properties, making it a good choice for coating and film-forming additives. Cross-linked polyvinylpyrrolidone has a high molecular weight and a cross-linked structure. It is insoluble in water, but it can rapi...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J3/24C08L39/06B23K26/00
CPCC08J5/18C08J3/24B23K26/00C08J2339/06B23K2103/42
Inventor 吴立军潘明明李强陈俪赟郭成成王云霞来辰廖国材马子伟
Owner SOUTH CHINA NORMAL UNIVERSITY
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