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Ph color-response sensing type micro-nanofiber, preparation method and application thereof

A technology of micro-nano fiber and color response, which can be used in fiber processing, spinning solution preparation, textile and paper making, etc. It can solve the problems of low sensitivity and long reaction time, and achieve simple process, short preparation time and pH color response sensitive effect

Inactive Publication Date: 2011-01-19
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing poly-Schiff base film is used for acid-induced discoloration with low sensitivity and long reaction time. The present invention provides pH Color response sensing micro-nano fiber and its preparation method and application

Method used

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  • Ph color-response sensing type micro-nanofiber, preparation method and application thereof
  • Ph color-response sensing type micro-nanofiber, preparation method and application thereof
  • Ph color-response sensing type micro-nanofiber, preparation method and application thereof

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specific Embodiment approach 1

[0023] Specific embodiment 1: In this embodiment, the pH color response sensing micro-nano fiber has a diameter between 10 nanometers and 2 microns, and is a spinning solution formed by dissolving poly-Schiff base in a polymer solution, through electrospinning technology; the poly-Schiff base is a polymer with dialdehyde triphenylamine as the reaction unit, which is polycondensed with an aromatic diamine monomer; the polymer solution is a polymer with electrospinning properties It is obtained by dissolving in an organic solvent; wherein the ratio of the mass of the polymer to the volume of the organic solvent is 1g:10mL-15mL, and the mass ratio of the polySchiff base to the polymer is 1:3-19.

[0024] The pH color responsive sensing micro-nano fiber of this embodiment has a uniform diameter distribution and a length of centimeter level.

[0025] The color of the pH color responsive sensing micro-nano fiber of this embodiment is determined by the type and usage ratio of the pol...

specific Embodiment approach 2

[0027] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the polymer with electrospinning performance is polystyrene (PS), polymethyl methacrylate (PMMA), polyacrylonitrile (PAN) and one or a mixture of several of them in polycarbonate (PC); the organic solvent is chloroform, dimethylformamide, dimethylacetamide, benzene, toluene, dichloroethane and tetrahydrofuran one or a mixture of several of them. Other parameters are the same as in the first embodiment.

[0028] In the present embodiment, when the polymer having electrospinning performance is a mixture of several types, they are mixed in an arbitrary ratio. When the organic solvent is a mixture of several types, they are mixed in an arbitrary ratio.

[0029] Neither the polymer nor the organic solvent has pH color responsiveness in this embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the structural formula of the poly-Schiff base is Among them n=4~12, Ar is Other parameters are the same as those in Embodiment 1 or Embodiment 2.

[0031] In the present embodiment, the polySchiff bases are sequentially described as Pa, Pb, Pc, Pd, Pe, and Pf according to the type of Ar described above. The preparation method of the above-mentioned poly-Schiff base is described in Haijun Niu, Peihui Luo. Multifunctional, photochromic, acidichromic, electrochromic molecular switch: Novel aromatic poly(azomehine)s containingtriphenylamine group. European Polymer Journal 45(2009) 3058-3071. (Chinese information: Niu Haijun et al. published in the "European Polymer Journal" in 2009 the multifunctionality, photochromism, ester coloration, electrochromism and molecular switch properties of the new aromatic ring polyimine containing triphenylamine group) .

[00...

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Abstract

The invention provides a pH color-response sensing type micro-nanofiber, a preparation method and application thereof, which relate to a response sensing type micro-nanofiber, a preparation method and application thereof. The invention solves the problems of low sensitivity and long reaction time of the traditional poly-Schiff base film for acidichromism. The diameter of the micro-nanofiber is between 10 nanometers and 2 micrometers, and the micro-nanofiber is prepared from a spinning solution through an electrostatic spinning technology. The preparation method comprises the following steps of: firstly, dissolving the poly-Schiff base into a polymer solution to prepare the spinning solution, and then, preparing the micro-nanofiber by the electrostatic spinning technology. The micro-nanofiber is applied to a pH color response sensor, is evenly distributed, is in bunched fiber or a felty film and has the advantages of sensitive pH color response and short metachromatism time (0.5s-1s). The pH color-response sensing type micro-nanofiber has obvious color response for 0.1-10000ppm response matters. The preparation method is completed at room temperature, has the advantages of short preparation time, convenient operation and low energy consumption, and is convenient to practice.

Description

technical field [0001] The invention relates to a response sensing micro-nano fiber and its preparation method and application. Background technique [0002] PolySchiff base PolySchiff base (referred to as PSB, also known as polyazomethine, polyazomethine) is a high-performance material with excellent heat resistance and mechanical properties, and is prepared due to its optoelectronic, nonlinear optical and magnetic properties. It has attracted attention and has attractive application prospects in nonlinear optics, secondary batteries, electrochromic displays and solid capacitors. The acid-induced color change of poly-Schiff base can achieve the effect of optical switching, and has potential application prospects in information storage and sensing. However, the use of poly-Schiff base films for acid-induced chromism has disadvantages such as low sensitivity and long reaction time. [0003] Due to the structural characteristics of extremely small diameter and extremely larg...

Claims

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Application Information

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IPC IPC(8): D01F8/16D01D1/02D01D5/00G01N21/80
Inventor 牛海军郝丽娜金政白续铎王淑红
Owner HEILONGJIANG UNIV
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