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Preparation method of super-hydrophobic polymeric fiber

A polymer fiber, super-hydrophobic technology, used in fiber treatment, liquid repellent fibers, textiles and papermaking, etc., can solve the problem of poor hydrophobic effect, incomplete modification of low surface energy functional groups, and complex nanostructure construction process. and other problems, to achieve the effect of excellent affinity

Active Publication Date: 2016-08-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the current preparation methods, there are usually problems such as the construction process of nanostructures is too complicated, the modification of low surface energy functional groups is incomplete, and the hydrophobic effect is not excellent.

Method used

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  • Preparation method of super-hydrophobic polymeric fiber

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preparation example Construction

[0025] The invention provides a kind of preparation method of superhydrophobic fiber, and the step comprises:

[0026] a) Construction of nano-microstructure: the surface of the polymer fiber is coated with a coating to obtain a surface-functionalized polymer fiber (a polymer fiber with abundant -NH2, -NH, or -OH functional groups on the surface) ; Wherein, the mass ratio of the polymer fiber to the coating is 5:1 to 25:1; the coating is a material rich in functional groups, specifically dopamine, γ-glycidyl etheroxypropyltrimethoxysilane , tetraethoxysilane or aminopropyltrihexoxysilane;

[0027] b) Surface modification: the surface functionalized polymer fibers obtained in step a) are modified with low surface energy materials to obtain superhydrophobic polymer fibers; wherein, the low surface energy materials are alkyl trichlorosilane or hexamethyl base disilazane.

Embodiment 1

[0030] Preparation of polycarbonate beaded fiber: The fiber is prepared by electrospinning. The spinning process conditions are: the concentration of the spinning solution is controlled at 0.12-0.20g / L, the loading voltage is 13-15KV, and the receiving distance is 10-15cm. , the matrix fiber obtained by electrospinning technology is polycarbonate beaded fiber;

[0031] The construction of the nano-microstructure: then the polycarbonate beaded fiber is placed in a Tris-dopamine buffer solution with a pH of 7-10.5 and a dopamine concentration of 0.008-0.01mmol / L (the preparation method of the Tris-dopamine buffer solution is: Add trishydroxymethylaminomethane and dopamine in the volumetric flask and add deionized water to make it up to the scale line to configure dopamine buffer), through the self-polymerization of dopamine, coat the PDA layer on the surface of the fiber, take out the fiber for 18h and use deionized water water to clean, in this process, constantly feed air into...

Embodiment 2

[0035] Preparation of polyethersulfone beaded fiber: the fiber is prepared by electrospinning, and the spinning process conditions are: the concentration of the spinning solution is controlled at 0.21-0.24g / L, the loading voltage is 13-15KV, and the acceptance distance is 10-15cm. , the matrix fiber obtained by electrospinning technology is polyethersulfone beaded fiber;

[0036] Construction of nano-microstructure: then the polyethersulfone beaded fiber is placed at a pH of 7-10.5 and a dopamine concentration of

[0037] In the 0.02-0.04mmol / L Tris-dopamine buffer, the PDA layer was coated on the surface of the fiber through the self-polymerization of dopamine, and the fiber was taken out for 20 hours and washed with deionized water. During this process, the buffer was continuously injected Air (control the gas flow rate at 140-180ml / min);

[0038] Surface modification: Finally, the polyethersulfone fiber coated with polydopamine was placed in a hexamethyldisilazane-n-hexane...

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Abstract

The invention relates to the technical field of high polymer material and particularly relates to a preparation method of a super-hydrophobic fiber. The preparation method of the super-hydrophobic fiber provided by the invention comprises the following steps: (a) constructing a nano-micro structure, namely coating the surface of polymeric fiber with a coating, thereby obtaining the polymeric fiber with surface subjected to functionalization, wherein the coating is dopamine, gamma-glycidyl ether oxygen propyl trimethoxy silane, tetraethoxy-silicane or aminopropyl triethoxysilane; and (b) performing surface modification, namely modifying the polymeric fiber with surface subjected to functionalization by use of a material with low surface energy, thereby obtaining the super-hydrophobic polymeric fiber, wherein the material with low surface energy is alkyltrichlorosilane or hexamethyl bisilazane. A contact angle between a fiber membrane manufactured by the fiber prepared by the method and water can be 168 degrees, the rolling angles of water drops on the fiber membrane are 4.5 degrees, and the fiber membrane has excellent affinity with ordinary organic solvents such as hexane and gasoline.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing superhydrophobic fibers. Background technique [0002] With the exploitation of offshore oil and the development of modern chemical industry, the release and pollution of organic solvents have caused an increasingly serious threat to the ecological environment on which we live, and the separation and removal of organic solvents in sewage is particularly important. Among them, superhydrophobic materials can effectively solve this problem. [0003] Superhydrophobic materials refer to materials with a contact angle with water greater than 150°. Superhydrophobic materials have hydrophobic properties and self-cleaning capabilities of antifouling, waterproofing and dustproofing. Since the wettability of solid materials is mainly determined by the chemical composition and surface microscopic geometric structure, the preparation methods of superhydrophob...

Claims

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Application Information

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IPC IPC(8): D06M15/61D06M13/513D06M13/507D06M13/517
CPCD06M13/507D06M13/513D06M13/517D06M15/61D06M2200/12
Inventor 王孝军邱芳杨杰卫志美张刚龙盛如
Owner SICHUAN UNIV
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