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PH color response sensing micro-nano fiber, preparation method and application thereof

A technology of micro-nano fiber and color response, applied in fiber processing, fiber chemical characteristics, filament/thread forming, etc., can solve the problems of long reaction time and low sensitivity, and achieve short preparation time, simple process and convenient operation Effect

Inactive Publication Date: 2011-02-02
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 micro-nano fiber, preparation method and application thereof
  • PH color response sensing micro-nano fiber, preparation method and application thereof
  • PH color response sensing micro-nano fiber, 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 polySchiff base is polycondensed with diaminotriphenylamine as the reaction unit, and aromatic diamine monomer to obtain a polymer; the polymer solution is to dissolve the polymer with electrospinning performance Obtained 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 poly-Schiff base...

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] In this embodiment, neither the polymer nor the organic solvent has pH color responsiveness, and the polymer only plays a supporting role in the pH color responsive sensing micro-nanofiber.

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 as follows:

[0031] Wherein n=4~12. Other parameters are the same as those in Embodiment 1 or Embodiment 2.

[0032] In this embodiment, P1 to P11 are sequentially represented according to the structural formula of the above polySchiff base. Among them, the preparation method of polySchiff bases P1-P10 was publicly recorded in the doctoral dissertation "Synthesis and Photoelectric Properties of PolySchiff bases" published by Harbin Institute of Technology doctoral student Niu Haijun in 2010. The polySchiff base P11 The preparation method is described in "All-aromatic liquid crystal triphenylamine-based poly(azomethine)s as hole transport materials for opto-electronic applications" ” published in the article by James C. Hindson, Burak Ulgut, Richard H. Friend, Neil C. Greenham, Ben Norder, Arek Kotlewski and...

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Abstract

The invention discloses a pH color response sensing micro-nano fiber, a preparation method and the application thereof, relating to a response sensing micro-nano fiber, a preparation method and the application thereof, and aiming to solve the problem of low sensitivity and long reaction time existing in current polyschiff base film used in acid-induced discoloration. The diameter of the micro-nano fiber is 10 nanometers to 2 microns and prepared from spinning solution through the electrostatic spinning technology. The preparation method comprises the following steps: dissolving polyschiff base into polymer solution so as to prepare spinning solution firstly; and then using the spinning solution to prepare the micro-nano fiber through the electrostatic spinning technology. The micro-nano fiber is applied to a pH color response sensor. The micro-nano fibers of the invention are distributed uniformly, and displayed as bunched fibers or blanket films; and have the advantages of high pH color response sensitivity and short discoloration reaction time, wherein the discoloration reaction time is 0.5 s to 1s, and the micro-nano fiber has obvious color response to the response substances (0.1 to 10000 ppm). The preparation method is completed at room temperature and convenient in operation, low in energy consumption, and facilitates to practical use.

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): D01F6/54C08G73/02D01F8/10D01F6/92D01F8/14D01F8/16D01F6/52D01F6/56D01D5/00D01F8/08
Inventor 牛海军郝丽娜孙立国吴洪张坤白续铎
Owner HEILONGJIANG UNIV
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