Sodium alginate modified amphiphilic feather as well as preparation method and application thereof

A sodium alginate and amphiphilic technology, applied in the field of biologically derived photothermal materials, can solve the problems of difficult biodegradation, high cost, and large-scale application obstacles, and achieve good biodegradability, reduce heat loss, and fast water The effect of transmission capacity

Active Publication Date: 2021-07-02
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the interface photothermal conversion materials reported so far are expensive and difficult to biodegrade, which brings certain obstacles to their large-scale application.

Method used

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  • Sodium alginate modified amphiphilic feather as well as preparation method and application thereof
  • Sodium alginate modified amphiphilic feather as well as preparation method and application thereof
  • Sodium alginate modified amphiphilic feather as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] material preparation

[0030] 1) Disperse 20 mg of sodium alginate powder into 10 ml of water, oscillate and mix for 3 minutes, and ultrasonicate for 10 minutes to obtain a sodium alginate solution with a good dispersion and a concentration of 2 mg / ml;

[0031] 2) Disperse 10ml of absolute ethanol into 10ml of sodium alginate solution, oscillate and mix for 2 minutes, and ultrasonicate for 5 minutes to obtain a mixed solution with good dispersion and a sodium alginate concentration of 1mg / ml;

[0032] 3) After the mixed solution was sprayed on one side of the feather for 5 times, it was dried under vacuum at 40° C. for 12 hours to obtain an amphiphilic feather assembled with a layer of sodium alginate.

[0033] efficiency test

[0034] 1) Place the amphiphilic feather with the hydrophilic side facing down in a beaker filled with 3% NaCl solution;

[0035] 2) Place the beaker under a xenon lamp with a solar intensity (1kW / m2) for 8 hours, and obtain the real-time chang...

Embodiment 2

[0040] material preparation

[0041] 1) Disperse 40mg of sodium alginate powder into 10ml of water, oscillate and mix for 5 minutes, and ultrasonicate for 15 minutes to obtain a sodium alginate solution with a good dispersion and a concentration of 4mg / ml;

[0042] 2) Disperse 10ml of absolute ethanol into 10ml of sodium alginate solution, oscillate and mix for 3 minutes, and sonicate for 10 minutes to obtain a mixed solution with good dispersion and a sodium alginate concentration of 2mg / ml;

[0043] 3) After spraying the mixed solution on one side of the feather for 8 times, it was dried under vacuum at 40° C. for 12 hours to obtain an amphiphilic feather assembled with a layer of sodium alginate.

[0044] efficiency test

[0045] 1) Place the amphiphilic feather with the hydrophilic side down in a beaker filled with 5% NaCl solution;

[0046] 2) Place the beaker under a xenon lamp with a solar intensity (1kW / m2) for 8 hours, and obtain the real-time change curve of the ma...

Embodiment 3

[0050] material preparation

[0051] 1) Disperse 80mg of sodium alginate powder into 10ml of water, shake and mix for 7 minutes, and ultrasonicate for 20 minutes to obtain a sodium alginate solution with a good dispersion and a concentration of 8mg / ml;

[0052] 2) Disperse 10ml of absolute ethanol into 10ml of sodium alginate solution, oscillate and mix for 5 minutes, and sonicate for 15 minutes to obtain a mixed solution with good dispersion and a sodium alginate concentration of 4mg / ml;

[0053] 3) After spraying the mixed solution on one side of the feather 8 times, it was dried in vacuum at 40° C. for 16 hours to obtain an amphiphilic feather assembled with a layer of sodium alginate.

[0054] efficiency test

[0055] 1) Place the amphiphilic feather with the hydrophilic side down in a beaker filled with 8% NaCl solution;

[0056] 2) Place the beaker under a xenon lamp with a solar intensity (1kW / m2) for 8 hours, and obtain the real-time change curve of the mass of the d...

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Abstract

The invention discloses sodium alginate modified amphiphilic feather. One surface of the feather is uniformly covered with a layer of sodium alginate. The invention also discloses a preparation method of the sodium alginate modified amphiphilic feather. The method comprises the following steps of (1) dispersing sodium alginate powder into a solvent, performing oscillating and uniform mixing, and carrying out ultrasonic treatment to obtain a high-dispersity sodium alginate solution; (2) dispersing absolute ethyl alcohol into the sodium alginate solution, performing oscillating and uniform mixing, and performing ultrasonic treatment to obtain a high-dispersity mixed solution; and (3) spraying the mixed solution on one side of the feather, and carrying out vacuum heat drying to obtain the final product. The amphiphilic feather can accelerate water delivery and reduce heat loss; both the sodium alginate and the feather are biodegradable materials, which are environment-friendly and non-toxic, and are cheap and easy to obtain; and the preparation process is simple, the operation is carried out at room temperature, the cost is relatively low, the feather is environment-friendly and non-toxic, and the obtained amphipathic feather has excellent photothermal conversion efficiency and salt resistance and has a wide development prospect in the field of seawater desalination.

Description

technical field [0001] The invention belongs to the field of biologically derived photothermal materials, and in particular relates to a sodium alginate modified amphiphilic feather and a preparation method and application thereof. Background technique [0002] Water is the source of human life. However, the fresh water resources available for human use only account for 2.7% of the total water resources on the earth, and 90% of the fresh water resources exist in the glaciers that are difficult for humans to exploit and the harsh environments of the Antarctic and the North Pole. The fresh water resources that can be directly used by humans are only It accounts for 0.27% of all water resources. At present, more than half of the world's population lives in water-deficient or extremely water-deficient areas, and the diseases and deaths caused by water shortage are countless. If seawater resources can be transformed into freshwater resources that can be used by humans through c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M19/00
CPCD06M19/00
Inventor 胡晓珍史开源申婷周俊宏刘悦晗
Owner NANJING UNIV OF INFORMATION SCI & TECH
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