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Method for preparing high-hydrophobic polyester

A hydrophobic, polyester technology, applied in nanotechnology for materials and surface science, fiber processing, textiles and papermaking, etc., can solve the limitations of large-scale application of hydrophobic materials, expensive raw material preparation conditions, insufficient hydrophobic surface effect ideals etc.

Active Publication Date: 2011-07-06
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although many methods for preparing hydrophobic surfaces have been studied at home and abroad, most of the existing methods involve expensive raw materials and harsh preparation conditions, or the hydrophobic surface effect formed is not ideal, which limits the large-scale application of hydrophobic materials. application

Method used

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  • Method for preparing high-hydrophobic polyester
  • Method for preparing high-hydrophobic polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Take the PET film as a sample, put it in o-chlorophenol:dichloroethane (1:2) solution at 20°C, take it out after 15s, put it in acetone solution quickly, take it out after 1min, and dry it.

[0094] After the resulting treatment, the particles on the surface of the polyester film are evenly distributed, and observed under a scanning electron microscope at 5000 times, the surface SEM image is as follows figure 1 As shown, the measured diameter is 1.5-2 μm, the single particle is porous and honeycomb-shaped, and the contact angle is 118.4°. The photo of the contact angle is as follows figure 2 shown.

Embodiment 2

[0096] Take the polyester film in Patent Application No. 200910312659X as a sample. The structural formula of the polyester used is shown as IA. Put it in the nitrobenzene solution at 40°C, take it out after 30s, put it in the ethanol solution quickly, take it out after 1min, drying.

[0097] After the resulting treatment, the particles on the surface of the polyester film are evenly distributed, and observed under a scanning electron microscope at 5000 times, the surface SEM image is as follows image 3 As shown, the diameter is 2.5~3.5μm, the individual particles are distributed in flakes, and the contact angle is 144.5°. The contact angle photo is as follows Figure 4 shown.

[0098]

Embodiment 3

[0100] Taking the polyester film in the patent application number 200910312659X as a sample, the structural formula of the polyester used is as shown in IA, at 23°C, put it in cresol:tetrachloroethane (4:1) solution, take it out after 90s, and put it away quickly Put it into methanol solution, take it out after 1min, and dry it.

[0101] After the resulting treatment, the particles on the surface of the polyester film are evenly distributed, and observed under a scanning electron microscope at 5000 times, the surface SEM image is as follows Figure 5 As shown, the particle size is 1-2 μm, the surface morphology is tree-like, and the individual particles are flake-like; the contact angle is 140.5°, and the photo of the contact angle is as follows: Figure 6 shown.

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Abstract

The invention relates to polyester and a preparation method thereof, in particular to a method for preparing high-hydrophobic polyester, and the prepared high-hydrophobic polyester with a lotus leave-like micro / nano hierarchical composite structure. A dissolution-precipitation method is adopted for preparing the high-hydrophobic polyester, and comprises the following steps of: putting polyester into a good solvent for dissolution at the temperature of between 0 and 80DEG C; after the polyester is dissolved for 1 to 300 seconds, taking a part of dissolved polyester sample out, and putting intoa poor solvent; and drying the treated polyester sample to obtain the high-hydrophobic polyester product. In the method for preparing the high-hydrophobic polyester, by strong effects of the good solvent and the poor solvent on a substrate material, the surface of the substrate material is dissolved and crystals are separated out, so that the lotus leave-like micro / nano hierarchical composite structure is formed, the hydrophobic property is good and the contact angle is 118 to 155 degrees.

Description

technical field [0001] The invention relates to a method for preparing polyester, in particular to a method for preparing strongly hydrophobic polyester and the prepared polyester with a micro-nano composite structure similar to lotus leaves. Background technique [0002] In recent years, the lotus leaf effect has aroused widespread interest in the research of bionic systems. The chemical composition and structural properties of lotus leaves and other plant surfaces provide a theoretical basis for the preparation of biomimetic hydrophobic surfaces on different substrates. [0003] At present, the methods for preparing hydrophobic surfaces mainly include electrochemical methods, vapor deposition methods, sol-gel methods, self-assembly methods, plasma etching methods, and template methods. Domestic universities and research institutes have done a lot of research work and achieved many achievements in this area. Professor Zhang Xi of Tsinghua University and others used altern...

Claims

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Application Information

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IPC IPC(8): C08J7/02C08L67/00C08L67/02D06M13/08D06M13/392D06M13/144D06M13/127D06M13/152D06M13/402D06M13/156B82Y40/00B82Y30/00D06M101/32
Inventor 金剑
Owner CHINESE TEXTILE ACAD
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