Cobweb-like hollow spindle knot microfiber device with water collection characteristic and preparation method

A microfiber and microfluidic device technology, applied in the field of biomimetic materials, can solve the problems of fiber water collection efficiency to be improved, fiber capillary adsorption force is weak, etc., achieve good water collection efficiency, flexible and convenient production, and alleviate fresh water shortage Effect

Active Publication Date: 2022-05-10
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage is that the spindle knuckle microfibers prepared by the above method, due to the weak capillary adsorption force of the fibers, the droplets suspended on the fibers are small during water collection, and the water collection efficiency of the fibers needs to be improved.

Method used

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  • Cobweb-like hollow spindle knot microfiber device with water collection characteristic and preparation method
  • Cobweb-like hollow spindle knot microfiber device with water collection characteristic and preparation method
  • Cobweb-like hollow spindle knot microfiber device with water collection characteristic and preparation method

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preparation example Construction

[0040] A preparation method for imitating spider silk hollow spindle knuckle microfibers, comprising the following steps:

[0041] Step 1: fully miscible equal volumes of polyethylene glycol aqueous solution with a mass fraction of 5-15% and dextran aqueous solution with a mass fraction of 5-15%, and then separate phases; the upper phase is polyethylene glycol solution, and the lower phase is The phase is a dextran solution; after fully miscible in a beaker under the condition of magnetic stirring (200 rpm), the phases can be separated after standing for 6 hours; the molecular weight of polyethylene glycol is 8kDa, and the molecular weight of dextran is 500kDa.

[0042] Step 2: Add calcium chloride to the dextran solution obtained in step 1 to form a mixed solution A, and the calcium chloride content in the mixed solution A is 1 to 5 mg·mL -1 ;

[0043] Step 3: adding sodium alginate to the polyethylene glycol solution obtained in step 1 to form a mixed solution B, the conten...

Embodiment 1

[0047] A preparation method for imitating spider silk hollow spindle knuckle microfibers, comprising the following steps:

[0048] Step 1: Prepare 50 mL of an aqueous solution of polyethylene glycol with a mass fraction of 8 wt % and 50 mL of an aqueous solution of dextran with a mass fraction of 8 wt %; after fully mixing, stand still for 6 hours and then separate phases. The upper phase is a polyethylene glycol solution, and the lower phase is a dextran solution; extract the upper and lower phases and store them in different beakers for later use.

[0049] Step 2: Add calcium chloride to the dextran solution obtained in step 1 to form a mixed solution A, and the calcium chloride content in the mixed solution A is 4 mg·mL -1 ;

[0050] Step 3: adding sodium alginate to the polyethylene glycol solution obtained in step 1 to form a mixed solution B, the content of calcium alginate in the mixed solution B is 2wt%;

[0051] Step 4: inject the mixed solution A into the plastic s...

Embodiment 2

[0055] A preparation method for imitating spider silk hollow spindle knuckle microfibers, comprising the following steps:

[0056] Step 1: Prepare 50 mL of an aqueous solution of polyethylene glycol with a mass fraction of 8 wt % and 50 mL of an aqueous solution of dextran with a mass fraction of 8 wt %; after fully mixing, stand still for 6 hours and then separate phases. The upper phase is a polyethylene glycol solution, and the lower phase is a dextran solution; extract the upper and lower phases and store them in different beakers for later use.

[0057] Step 2: Add calcium chloride to the dextran solution obtained in step 1 to form a mixed solution A, and the calcium chloride content in the mixed solution A is 4 mg·mL -1 ;

[0058] Step 3: adding sodium alginate to the polyethylene glycol solution obtained in step 1 to form a mixed solution B, the content of calcium alginate in the mixed solution B is 2wt%;

[0059] Step 4: inject the mixed solution A into the plastic s...

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Abstract

The invention relates to a cobweb-imitated hollow spindle section microfiber device with a water collection characteristic and a preparation method, the cobweb-imitated hollow spindle section microfiber device with the water collection characteristic is composed of an inner phase feeding pipe, a middle phase feeding pipe and an outer phase feeding pipe which are coaxial and a discharging pipe, and a dextran solution containing calcium chloride, a dextran solution containing calcium alginate and liquid paraffin are respectively pumped into the inner phase feeding pipe, the intermediate phase feeding pipe and the outer phase feeding pipe. On the basis of hydrodynamics, alginic acid and a calcium chloride solution are mixed in a pipeline to be subjected to gelation reaction by utilizing a chemical principle that sodium alginate and calcium chloride react to generate calcium alginate hydrogel; a periodic spindle joint structure is formed by utilizing the shearing force of an oil-water interface, and water collection is performed by virtue of a Laplace pressure difference and a surface energy level gradient; and the water collection effect of the fiber is enhanced by utilizing the capillary water absorption effect. The preparation method disclosed by the invention is simple, low in cost, high in experimental repeatability, beneficial to batch production, safe in preparation process and high in material biocompatibility.

Description

technical field [0001] The invention relates to the technical field of bionic materials, in particular to a spider silk-like hollow spindle knuckle microfiber device with water-collecting properties and a preparation method. Background technique [0002] Freshwater scarcity is a global crisis, affecting about two-thirds of the world's population. Although my country's total fresh water resources rank sixth in the world, the per capita fresh water resources are only a quarter of the world average. For arid regions, the shortage of fresh water resources not only affects economic development but may even threaten national security. [0003] In nature, some organisms have evolved special surface structures through long-term natural selection, which can collect water from fog. With its unique structure, spider silk also exhibits an amazing ability to collect water. In the morning after the rain, the spider web is full of crystal droplets. Spider silk is composed of periodic sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/24D01F8/18D01F8/16
CPCD01D5/24D01F8/18D01F8/16
Inventor 孟涛刘环宇尹伟王艺颖郭婷
Owner SOUTHWEST JIAOTONG UNIV
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