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Multifunctional anisotropic fiber, and preparation method using adverse solvent solidification

A poor solvent, multi-functional technology, applied in the direction of fiber chemical characteristics, chemical instruments and methods, cellulose/protein conjugated artificial filaments, etc., can solve the problems of complicated separation steps, not green enough, limited applications, etc., to achieve preparation Simple process, good reproducibility, and wide range of potential applications

Inactive Publication Date: 2018-12-07
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of organic continuous equalization will introduce impurities, not green enough, and the steps of post-treatment, solidification, and separation are more complicated, which limits its application in fields such as biology, so it is imperative to establish a new simple green method, and at the same time , the development of new methods and the synthesis of multifaceted heterotropic fibers are still a challenging task

Method used

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  • Multifunctional anisotropic fiber, and preparation method using adverse solvent solidification

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preparation example Construction

[0025] In order to solve the above technical problems, the technical solution adopted in the present invention is: provide a preparation method for preparing the multifunctional anisotropic fiber, the prepared fiber is realized by a microfluidic device, comprising the following steps:

[0026] First, the construction of the microfluidic device

[0027] Utilizing microfluidic processing technology, using microchannels to construct microfluidic devices with different channel numbers and different shell structures at channel outlets, and equipped with transition small pulleys and fiber collectors:

[0028] Next, the preparation steps of multifunctional fiber:

[0029] Use the pump body to fill one or more polymers into the syringes respectively, connect the respective microchannel inlets, use the digital control syringe pump to control the flow rate of the polymer solution in each microchannel, and insert the end of the microfluidic device into the receiving chamber of the water....

Embodiment 1

[0041] Embodiment 1 has the preparation of the anisotropic multifunctional fiber of two-component structure:

[0042] 1. Construction of the microfluidic device:

[0043] The microfluidic channel is prepared by means of micro-machine and manual processing, including each single-channel part and a shell structure part at the outlet of the channel, and the shell structure part is a circular structure.

[0044] 2. Fiber Preparation

[0045] (1) Configuration of various polymer solutions:

[0046] Polymer solution 1: 10% polyacrylonitrile solution, adding 0.2 nanometer ferric oxide particles.

[0047] Polymer solution 2: 11% cellulose acetate solution, wrapped in 1% coumarin as the model drug

[0048] (2) Formation and curing of fibers

[0049] Put the above two solutions into different syringes, connect the respective microchannel inlets, immerse the outlet of the microfluidic device below the liquid level of distilled water, use a numerically controlled syringe pump to control...

Embodiment 2 3

[0050] Example 2 Preparation of three-sided anisotropic multifunctional fiber

[0051] 1. Construction of the microfluidic device:

[0052] A microfluidic channel is prepared by using micro-machine and manual processing methods, including each single-channel component, and a shell structure component at the channel outlet (the shell-like structure is circular).

[0053] 2. Fiber Preparation

[0054] (1) Configuration of various polymer solutions:

[0055] Polymer solution 1: 25% cellulose acetate phthalate solution was prepared, and 1% coumarin was wrapped as a model drug.

[0056] Polymer solution 2: Prepare 30% polystyrene solution, wrap 1% Ag nanoparticles and 1% coumarin as model drugs.

[0057] Polymer solution 3: prepare 20% polycaprolactone solution, and wrap 0.5% iron ferric oxide nanoparticles.

[0058] (2) Formation and curing of fibers

[0059] Put the above three solutions into different syringes, connect the respective microchannel inlets, immerse the outlet ...

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Abstract

The invention provides a method and a device used for preparing multifunctional anisotropic fiber with an adverse solvent. According to the method, channel number is changed to obtain anisotropic fiber of different surface numbers; channel opening shell structure shape can be changed to obtain anisotropic fiber of different morphologies; a polymer solution is added into a receiving bath solution so as to obtain target fiber. Fiber collecting is carried out using pulleys, and a collecting device. No chemical or ultraviolet light curing is adopted, and continuous obtaining of fiber is realized.Water is taken as the adverse solvent to prepare fiber, especially the multi-surface anisotropic fiber, and micrometer grade fiber is provided with a plurality of functions. Experiment equipment is simple, assembling is convenient, the adopted materials are degradable, no pollution is caused by the adopted material, the preparation method is simple and green, preparation is rapid, size is uniform,and the application prospect of the multifunctional anisotropic fiber is promising.

Description

technical field [0001] The invention belongs to the field of polymer functional materials, and in particular relates to a method for preparing multifunctional anisotropic fibers by curing with a poor solvent. Background technique [0002] Fiber refers to a substance consisting of continuous or discontinuous filaments. There are many natural fibers in nature. Fibers can be obtained from plants, animals and minerals, such as jute, wool, mineral fibers, etc. In animals and plants, fibers play an important role in maintaining tissues. It can be woven into thin thread, thread end and hemp rope, and can also be woven into fiber layer when making paper or felt; it is also commonly used to make other materials and form composite materials with other materials. Natural fibers can be seen everywhere in our daily life. Compared with natural fibers, chemical fibers are fibers processed by chemical means, and have a wide range of sources and types, and have important applications in man...

Claims

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Application Information

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IPC IPC(8): D01F8/08D01F8/02D01F1/10D01F8/10D01F8/14D01F8/16B01F13/00
CPCD01F1/10D01F8/02D01F8/08D01F8/10D01F8/14D01F8/16B01F33/30
Inventor 黄超伯唐国胜许芊芊
Owner NANJING FORESTRY UNIV
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