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Hydrophobic modification method for paper

A hydrophobic modification and hydrophobic modifier technology, applied in the field of medicine, can solve problems such as high equipment cost, adverse effects of analysis, and difficulty in removing emulsifiers, and achieve good biocompatibility, good biodegradability, and low cost Effect

Active Publication Date: 2017-10-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wax printing method needs to use a special wax printing machine, the price of which is at least tens of thousands of yuan, and the equipment cost is relatively high
The alkyl ketene dimer modification method can be realized by an inkjet printer, and the equipment is cheap, but the alkyl ketene dimer used as a modifier must be made into a water-soluble emulsion
In order to maintain the stability of water-soluble emulsions, a large amount of emulsifiers must be added, which are difficult to remove after the paper is hydrophobically modified, and may have adverse effects on subsequent analysis

Method used

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  • Hydrophobic modification method for paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for hydrophobic modification of paper, specifically comprising the following steps:

[0033] (1) Take a piece of quantitative filter paper with a diameter of 12cm, and print polycaprolactone on the surface of the filter paper with a 3D printer. After printing, the surface of the filter paper is covered with polycaprolactone, such as figure 1 shown;

[0034] (2) Place the filter paper covered with polycaprolactone on the surface in an oven, control the temperature at 160° C., and heat for 1 min to melt the polycaprolactone and penetrate into the filter paper;

[0035] (3) The filter paper after heating and drying is taken out from the oven, placed at room temperature and cooled for 24h, to obtain a hydrophobically modified filter paper, such as figure 2 shown.

[0036] Add red ink dropwise on the modified filter paper, the result is as follows image 3 shown. Depend on image 3 It can be seen that after polycaprolactone is solidified, a hydrophobic region ...

Embodiment 2

[0038] A method for hydrophobic modification of paper, specifically comprising the following steps:

[0039] (1) Take a piece of white board paper with a diameter of 12 cm, and print polycaprolactone on the surface of the white board paper with a 3D printer. After printing, the surface of the filter paper is covered with polycaprolactone;

[0040] (2) Put the white board paper covered with polycaprolactone on the surface in an oven, control the temperature at 60°C, and heat for 24 hours, so that the polycaprolactone melts and penetrates into the white board paper;

[0041] (3) The heated and dried white board paper was taken out of the oven, and cooled at -20° C. for 1 min to obtain a hydrophobically modified white board paper.

[0042] Red ink was added dropwise on the modified white board paper, and it was found that polycaprolactone formed a hydrophobic area on the paper after solidification, and the hydrophobic modification was successful.

Embodiment 3

[0044] A method for hydrophobic modification of paper, specifically comprising the following steps:

[0045] (1) Take a piece of 70g printing paper, and print polycaprolactone onto the surface of the printing paper with a 3D printer. After printing, the surface of the printing paper is covered with polycaprolactone;

[0046] (2) Put the printing paper covered with polycaprolactone on the surface in an oven, control the temperature at 100° C., and heat for 6 hours to melt the polycaprolactone and penetrate into the printing paper;

[0047] (3) The heated and dried printing paper was taken out of the oven, and cooled at 59° C. for 240 min to obtain hydrophobically modified printing paper.

[0048] Red ink was added dropwise on the modified printing paper, and it was found that polycaprolactone formed a hydrophobic area on the paper after solidification, and the hydrophobic modification was successful.

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Abstract

The invention discloses a hydrophobic modification method for paper. The method comprises the following steps: printing a hydrophobic modification agent polycaprolactone on the surface of the paper, heating, cooling, and enabling the hydrophobic modification agent to be solidified on the surface and in the paper, to obtain a hydrophobic-modified paper base chip. The method has the simple process, the cost of the used hydrophobic modification agent is low, the ingredient of the hydrophobic modification agent is simple relatively, and the following analysis result is affected slightly. In addition, a 3D printing technology can be used for manufacturing the hydrophobic area with the complicated shape and certain height, the convenience can be provided for the applications, such as the following analysis, and the method has the good application prospect.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a method for hydrophobically modifying paper. Background technique [0002] There have been many successful precedents for using paper as a substrate to prepare analytical materials in the fields of chemistry, biology and medicine, such as pregnancy test paper and pH test paper. At present, research on paper-based chips in the medical field is in the ascendant. [0003] The possible advantages of using paper-based chips for analysis and detection include: first, the cost of paper is very low, which is conducive to reducing the cost of analysis; Smartphones do not need professional analysis equipment to measure color results, and the detection cost is low; third, the used paper-based chips can be burned and destroyed, which is convenient for disposal; fourth, the paper itself has a certain chromatographic separation ability, It is conducive to the selective detection of complex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H23/32D21H19/10D21H21/16
CPCD21H19/10D21H21/16D21H23/32
Inventor 程翼宇瞿海斌龚行楚
Owner ZHEJIANG UNIV
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