Electrostatic spinning preparation method of porous polylactic acid fiber oil absorption material

A technology of polylactic acid fiber and oil-absorbing material, which is applied in the directions of electrospinning, separation method, fiber processing, etc., can solve the problems of low porosity, unusable oil absorption, low oil absorption capacity, etc., and achieve the effect of enhancing toughness

Inactive Publication Date: 2021-04-30
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to literature reports, the oil absorption capacity of PLA-based membranes is extremely low, and the prepared porosity is too low to be used for oil absorption.

Method used

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  • Electrostatic spinning preparation method of porous polylactic acid fiber oil absorption material
  • Electrostatic spinning preparation method of porous polylactic acid fiber oil absorption material
  • Electrostatic spinning preparation method of porous polylactic acid fiber oil absorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] PLA was selected as the matrix material, and the reaction conditions were regulated by the control variable method to prepare the PLA fiber oil-absorbing material with a suitable solvent ratio. The specific steps are: weigh 2.0000g of PLA pellets, dissolve it in 13.3mL of dichloromethane, and carry out magnetic stirring at room temperature for 1.5h. mL of acetone (acetone is added for phase separation with the good solvent during the spinning process, and at the same time, it can avoid needle blockage caused by too fast volatilization rate of methylene chloride), wherein acetone is added in 7 times, each time About 1mL, starting from the addition of acetone at intervals of 10min, the total time of stirring is 1.5h), and finally mixing evenly to obtain a solution, which is ready for spinning; the total of dichloromethane and acetone solution is 20mL. Put the freshly prepared solution into the syringe, and the air bubbles need to be driven out during this process.

[003...

Embodiment 2

[0035] Other steps are the same as in Example 1, except that 13.3mL of dichloromethane is replaced by 10mL of dichloromethane, and 6.7mL of acetone is replaced by 10mL of acetone, wherein the acetone is added in 10 times, 1mL each time, with an interval of 10min each time, under this condition The obtained spun fiber is the fiber with the dichloromethane and acetone ratio of 1:1.

[0036] The prepared oil-absorbing material was tested for oil absorption, and the oil absorption rate was calculated. image 3 a is the SEM image of the fiber surface at 1:1; from image 3 It can be seen from the fiber enlarged picture of b that when the ratio of good solvent to poor solvent is 1:1, the surface of the nanofiber fails to form a pore structure, indicating that although the volatilization rate and volatilization temperature of the good solvent and the poor solvent are different, the good solvent When the ratio of the solvent to the poor solvent is 1:1, the pore structure cannot be for...

Embodiment 3

[0038] Other steps are the same as in Example 1, except that 13.3mL of dichloromethane is replaced by 15mL of dichloromethane, and 6.7mL of acetone is replaced by 5mL of acetone, wherein the acetone is added in 5 times, each 1mL, each interval of 10min, under this condition The obtained spun fiber is the fiber with the ratio of dichloromethane and acetone at 3:1.

[0039] The prepared oil-absorbing material was tested for oil absorption, and the oil absorption rate was calculated. Figure 4 a is the SEM image of the fiber surface at 3:1; from Figure 4 It can be seen from the fiber enlarged picture of b that when the ratio of good solvent to poor solvent is 3:1, the surface of the nanofiber fails to form a pore structure, indicating that although the good solvent and the poor solvent have different volatilization rates and volatilization temperatures, the good solvent and the bad solvent When the solvent ratio is not appropriate, the pore structure may not necessarily be form...

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Abstract

The invention relates to an electrostatic spinning preparation method of a porous polylactic acid fiber oil absorption material. The method comprises the following steps: dissolving a polymer PLA in a good solvent, stirring, and adding a poor solvent to obtain a mixed solution; spraying the obtained mixed solution onto aluminum-foil paper through electrostatic spinning equipment to prepare spun fibers; and carrying out vacuum annealing treatment at 65-70 DEG C to obtain the porous polylactic acid fiber oil absorption material. The obtained fiber material has the characteristics of intercommunicated pore structure, high specific surface area, pore size distribution from submicrons to several microns, high porosity and the like, so that the ENF material has ultrahigh oil absorption capacity.

Description

technical field [0001] The invention belongs to the field of preparation of superhydrophobic and superoleophilic porous fiber oil-absorbing materials, in particular to a porous polylactic acid oil-absorbing material with biodegradability, high porosity and excellent oil-absorbing performance. Background technique [0002] In recent years, with the development of society, marine oil spills and industrial discharges and the resulting oil pollution have become increasingly serious, which have caused serious harm to human health and the ecological environment. In order to solve these oil spill problems, there are many methods to solve such problems, such as combustion, chemical degradation, physical filtration, adsorption materials and other methods. One of the effective measures, this is because the adsorption material can absorb oil into solid or semi-solid for further removal or remove oil through oil-water separation, because the adsorption material and oil-water separation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/04D01D5/00D01F6/62B01D17/022
CPCD01D1/04D01D5/003D01F6/62B01D17/0202
Inventor 丁会利任红倩冯怡刘晓阳杨梦洁夏明龙
Owner HEBEI UNIV OF TECH
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