Preparation method of super-hydrophobic polylactic acid non-woven material and product

A non-woven material, polylactic acid technology, used in textiles and papermaking, repelling fibers to liquids, fiber processing, etc., can solve the problems of poor durability of interfacial adhesion materials, narrow controllable range, and cumbersome preparation process. The effect of not easy to secondary pollution

Active Publication Date: 2020-06-19
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing superhydrophobic modification of the surface of nonwoven materials is mostly achieved by surface chemical grafting or surface deposition of nanoparticles. Adhesion at the interface makes the durability of the material poor

Method used

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  • Preparation method of super-hydrophobic polylactic acid non-woven material and product
  • Preparation method of super-hydrophobic polylactic acid non-woven material and product
  • Preparation method of super-hydrophobic polylactic acid non-woven material and product

Examples

Experimental program
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Effect test

Embodiment 1

[0041] 0.2g PLA was dissolved in 80ml of acetone / ethanol (volume fraction of acetone is 70%) solution, the solution was slowly added dropwise to 500ml of water, mechanically stirred and volatilized at normal temperature for 24h, and PLA nanoparticles were obtained through freeze-drying; , the PLA nonwovens were immersed in absolute ethanol for ultrasonic cleaning and dried at 80 °C. Dissolve 2g of epoxy resin, 2g of polyamide resin (curing agent), and 1g of KH-560 in 35g of ethanol, stir for 0.5 hours, add 6g of the PLA nanoparticles prepared above, stir at a constant speed at 40°C, and dissolve PLA with a thickness of 1mm The nonwoven material was cut into a size of 3cm×3cm (mass 3g), immersed in it, and dried in an oven at 80°C to obtain a superhydrophobic PLA nonwoven material.

[0042] SEM images for PLA nanoparticles, such as figure 1 As shown, the diameter of PLA nanoparticles is 80-100nm; the static water contact angle of the superhydrophobic PLA nonwoven material is 1...

Embodiment 2

[0044] 0.2g PLA was dissolved in 80ml of acetone / ethanol (volume fraction of acetone is 70%) solution, the solution was slowly added dropwise to 500ml of water, mechanically stirred and volatilized at normal temperature for 24h, and PLA nanoparticles were obtained through freeze-drying; , the PLA nonwovens were immersed in absolute ethanol for ultrasonic cleaning and dried at 80 °C. Dissolve 3g of epoxy resin, 3g of polyamide resin (curing agent), and 1g of KH-560 in 35g of ethanol, stir for 0.5 hours, add 6g of the PLA nanoparticles prepared above, and stir at a constant speed at 50°C. The PLA nonwoven material was cut into a size of 3cm×3cm (mass 3g), immersed in it, and dried in an oven at 80°C to obtain a superhydrophobic PLA nonwoven material.

[0045]The diameter of PLA nanoparticles is 80-100nm; the static water contact angle of the superhydrophobic PLA nonwoven material is 151.1°; the oil absorption rate for castor oil is 548.5%.

Embodiment 3

[0047] 0.2g PLA was dissolved in 80ml of acetone / ethanol (volume fraction of acetone is 70%) solution, the solution was slowly added dropwise to 500ml of water, mechanically stirred and volatilized at normal temperature for 24h, and PLA nanoparticles were obtained through freeze-drying; , the PLA nonwovens were immersed in absolute ethanol for ultrasonic cleaning and dried at 80 °C. Dissolve 4g of epoxy resin, 4g of polyamide resin (curing agent), and 1g of KH-560 in 31g of ethanol, stir for 0.5 hours, add 6g of the PLA nanoparticles prepared above, and stir at a constant speed at 60°C. The PLA nonwoven material was cut into a size of 3cm×3cm (mass 3g), immersed in it, and dried in an oven at 80°C to obtain a superhydrophobic PLA nonwoven material.

[0048] The diameter of PLA nanoparticles is 80-100nm; the static water contact angle of the superhydrophobic PLA nonwoven material is about 152.0°; the oil absorption rate for castor oil is 550.5%.

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Abstract

The present invention discloses a preparation method of a super-hydrophobic polylactic acid non-woven material. The method comprises the steps that in an adhesive coating solution, polylactic acid nanoparticles are used as a modification material for modifying the polylactic acid non-woven material to obtain the super-hydrophobic polylactic acid non-woven material. The invention simultaneously discloses the super-hydrophobic polylactic acid non-woven material prepared with the method. The super-hydrophobic PLA non-woven material prepared with the method has the selective oil absorption performance, the relatively good oil-water separation effect and the relatively strong mechanical property.

Description

technical field [0001] The invention relates to the field of preparation of superhydrophobic textiles, in particular to a preparation method and product of a superhydrophobic polylactic acid nonwoven material. Background technique [0002] Polylactic acid (PLA) is a biodegradable material that can be completely degraded into carbon dioxide and water under natural conditions, and its waste will not pollute the environment. It has received more and more attention in the fields of medicine, packaging, and textiles. Nonwoven materials prepared from PLA, combined with its advantages of high porosity and low production cost, have shown great promise in the fields of water-oil separation and water / oil absorption materials. However, water-oil separation and water-oil selective adsorption materials put forward higher requirements on the wettability of the material surface. Only when the hydrophobic angle ≥ 150° or the hydrophilic angle = 0° can high water-oil selectivity be achieved....

Claims

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Application Information

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IPC IPC(8): D06M15/507D06M15/55D06M13/513D06M101/32
CPCD06M15/507D06M15/55D06M13/513D06M2101/32D06M2200/12
Inventor 苏娟娟韩建虞启浩崔超凡
Owner ZHEJIANG SCI-TECH UNIV
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