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A high-efficiency fog-collecting infiltrating composite twisted fiber rope and its preparation method

A technology of wettability and fiber rope, which is applied in the field of wettable composite twisted fiber rope with high efficiency for collecting fog and its preparation, can solve the problems of limited application, high cost and energy consumption, and achieve good durability, moderate stress and strain, and water collection. Excellent performance

Active Publication Date: 2020-10-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost and energy consumption of this method are extremely high, which further limits its application

Method used

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  • A high-efficiency fog-collecting infiltrating composite twisted fiber rope and its preparation method
  • A high-efficiency fog-collecting infiltrating composite twisted fiber rope and its preparation method
  • A high-efficiency fog-collecting infiltrating composite twisted fiber rope and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030](1) Select analytically pure N, N-dimethylformamide as organic solvent, dissolve polyacrylonitrile (PAN) in organic solvent, be mixed with the homogeneous transparent pure polyacrylonitrile solution that mass fraction is 10%, As spinning solution A.

[0031] (2) Select analytically pure acetone and N,N-dimethylacetamide, mix them as an organic solvent according to a mass ratio of 7:3, and dissolve polyvinylidene fluoride and hexafluoropropylene (PVDF-HFP) in the organic solvent, A uniform and transparent pure polyvinylidene fluoride-hexafluoropropylene solution with a mass fraction of 15% was prepared as spinning solution B.

[0032] (3) With the drum as the receiving base, place the PAN spinning solution A prepared in step (1) in a syringe with a nozzle diameter of 0.6mm in the electrospinning device, slowly adjust and apply a voltage of 14-17kV, within the working distance Electrospinning is carried out when the diameter is 12-20cm, the propulsion speed of spinning so...

Embodiment 2

[0039] (1) Select analytically pure N,N-dimethylacetamide as an organic solvent, dissolve polyvinylidene fluoride (PVDF) in the organic solvent, and prepare a uniform and transparent pure polyvinylidene fluoride with a mass fraction of 15% solution, as spinning solution B.

[0040] (2) select analytically pure N,N-dimethylformamide as organic solvent, dissolve polyacrylonitrile (PAN) in organic solvent, be mixed with the homogeneous transparent pure polyacrylonitrile solution that mass fraction is 20%, As spinning solution A.

[0041] (3) With the drum as the receiving substrate, place the PVDF spinning solution prepared in step (1) in a syringe with a nozzle diameter of 0.6 mm in the electrospinning device, slowly adjust and apply a voltage of 15-22 kV, within the working distance Electrospinning is carried out when the diameter is 15-20cm, the propulsion speed of spinning solution B is 3mL / h, the spinning time is 15-25min, and the rotating speed of the drum is 1500r / min. T...

Embodiment 3

[0047] (1) Select analytically pure acetone and N,N-dimethylacetamide, mix them as an organic solvent according to a mass ratio of 7:3, and dissolve polyvinylidene fluoride and hexafluoropropylene (PVDF-HFP) in the organic solvent, A uniform and transparent pure polyvinylidene fluoride-hexafluoropropylene solution with a mass fraction of 5% was prepared as spinning solution B.

[0048] (2) Select analytically pure N,N-dimethylformamide as an organic solvent, dissolve polyacrylonitrile (PAN) in the organic solvent, and prepare a uniform and transparent pure polymetaacrylonitrile solution with a mass fraction of 10% , as spinning solution A.

[0049] (3) With the drum as the receiving substrate, the PVDF-HFP spinning solution prepared in step (1) is placed in the nozzle of an electrospinning device with a diameter of 0.5 mm, and slowly adjusted and applied with a voltage of 17-20 kV. Electrospinning is carried out when the distance is 13-17cm, the propulsion speed of the spinni...

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Abstract

The invention discloses an efficient mist-collection wettability composite twisting cordelle and a preparation method thereof and belongs to the technical field of functional one-dimensional materials. The preparation method comprises the steps that a hydrophilic fiber membrane A and a lyophobic fiber membrane B are prepared through electrostatic spinning, cut into strip-shaped fiber membranes with the same length respectively and subjected to first-level twisting, a hydrophilic cordelle A after first-level twisting and a lyophobic cordelle B after first-level twisting are obtained, and meanwhile a composite twisting cordelle is obtained through second-level twisting; the composite twisting cordelle has a hydrophilic and lyophobic spaced patterning surface, and a novel idea is provided fordesign of a wettability heterostructure; the composite twisting cordelle has good water collection stability, mechanical properties and gas permeability and is expected to achieve important actual application value in the fields such as water and mist collection and water resource shortage.

Description

technical field [0001] The invention belongs to the technical field of functional one-dimensional materials. In particular, it relates to a high-efficiency fog-collecting infiltrating composite twisted fiber rope and a preparation method thereof. Background technique [0002] At present, water shortage is becoming an increasingly serious global problem. How to obtain more usable water resources is an urgent problem that needs to be addressed. At present, desalination of seawater is an important solution to the shortage of water resources. However, the cost and energy consumption of this method are extremely high, which further limits its application. Inspired by the special structure and water-collecting ability of organisms in nature, researchers have discovered another possibility to solve the water crisis. So far, researchers have prepared a large number of biomimetic materials with the ability to collect water. The beetle in the Namib Desert can survive in the arid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D07B1/02D04H1/728D01D5/00
CPCD01D5/003D04H1/728D07B1/02D07B2205/20
Inventor 王女赵勇仇梦娜
Owner BEIHANG UNIV