Surface modification method of polypropylene non-woven fabric

A polypropylene non-woven fabric and surface modification technology, which is applied in textiles, papermaking, fiber treatment, etc., can solve problems such as instability of self-assembled films, and achieve good application prospects, easy operation, and simple modification process.

Inactive Publication Date: 2015-04-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, self-assembled films are not stable in polar so

Method used

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  • Surface modification method of polypropylene non-woven fabric
  • Surface modification method of polypropylene non-woven fabric
  • Surface modification method of polypropylene non-woven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: the surface modification method of this polypropylene nonwoven fabric, specific content is as follows:

[0048] (1) Introduction of carboxyl groups on the surface of PP nonwoven fabric under UV irradiation

[0049] Refer to the method in the Chinese patent application (application number 201010559722.2) "A high carboxyl content ion-exchange non-woven fabric and its preparation method", the specific operation steps are as follows:

[0050] (A) Cut a batch of circular PP non-woven fabrics with a diameter of 8cm (area density 12.5g / m 2 , thickness 73.8μm, water absorption rate 52.1%), soak in acetone for 12h, remove surface oil and additives and other impurities, take it out and dry it for later use; (B) Mix acetone with 50% (volume percentage) and distilled water to make a mixed solvent , add acrylic acid, benzophenone and azobisisobutyronitrile to make a monomer solution for later use. 0.5g / L; (C) Soak the clean and dry PP non-woven fabric in the above mo...

Embodiment 2

[0063] Embodiment 2: the surface modification method of this polypropylene nonwoven fabric, specific content is as follows:

[0064] (1) Introduction of carboxyl groups on the surface of PP nonwoven fabric under UV irradiation

[0065] Carried out with reference to the method of Example 1, and the measurement results are shown in Table 2.

[0066] (2) Electrostatic self-assembly of carboxyl groups on the surface of PP non-woven fabrics and p-phenylenediamine monodiazonium salt cations

[0067]Weigh 3 parts of p-phenylenediamine and dissolve them in 2mol / L hydrochloric acid to prepare p-phenylenediamine solutions respectively. Dissolve sodium nitrite in distilled water to make a 1mol / L solution. Slowly add sodium nitrite solution in an equimolar amount to p-phenylenediamine in the diamine solution, and stir in the dark for 3 hours to obtain p-phenylenediamine monodiazonium salt cation solution, the concentration of which is 0.33 mmol / L.

[0068] Soak 3 parts of the PP non-w...

Embodiment 3

[0077] Embodiment 3: the surface modification method of this polypropylene nonwoven fabric, specific content is as follows:

[0078] (1) Introduction of sulfate groups on the surface of PP non-woven fabrics under UV irradiation

[0079] The mass concentration of preparing respectively is 15%, 20%, 25%, 30% and 35% ammonium persulfate aqueous solution;

[0080] Cut the PP non-woven fabric into a square and spread it on a piece of glass, then inject the ammonium persulfate solution into the PP non-woven fabric with a micro syringe to make it wet, and then put the polyethylene film (thickness 23 microns) on the PP non-woven fabric. Press it tightly on the cloth to form a sandwich structure, and then place it under a 500W ultraviolet lamp and irradiate it at a distance of 25 cm for 10 minutes; after the reaction, take out the PP non-woven fabric and soak it in 1mol / L hydrochloric acid for 0.5 hours, and then rinse it with distilled water three times , soaked in distilled water fo...

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Abstract

The invention discloses a surface modification method of a polypropylene non-woven fabric. The surface modification method is an ultraviolet radiation-diazonium salt electrostatic self-assembly two-step method polypropylene non-woven fabric surface modification method which comprises the following steps: performing grafting polymerization on the surface of a PP non-woven fabric by using crylic acid under ultraviolet radiation or oxidation on the surface of the PP non-woven fabric by using ammonium persulfate ultraviolet radiation, thereby respectively obtaining surface containing carboxyl or sulfate anion; soaking the PP non-woven fabric surface modified material with the anion into a p-phenylenediamine diazonium salt solution for electrostatic self-assembly, and performing ultraviolet radiation treatment so as to convert ionic bonds of the electrostatic self-assembly product into covalent bonds, thereby obtaining a PP non-woven fabric surface modified material. By adopting the method, high-efficiency introduction of two polar groups on the surface of the PP non-woven fabric can be achieved, the water absorption rate of the PP non-woven fabric is increased, and the water contact angle of the PP non-woven fabric is reduced; due to introduction of aromatic amine, multiple chemical ways are developed for the PP non-woven fabric to couple and fix other functional molecules later, so that the PP non-woven fabric surface modified material can be used as a universal carrier material with active chemical property.

Description

technical field [0001] The invention relates to a surface modification method of polypropylene (PP) non-woven fabric, in particular to a two-step surface modification method of polypropylene non-woven fabric through ultraviolet (UV) irradiation and diazonium salt electrostatic self-assembly. Background technique [0002] Polypropylene (PP) non-woven fabric has random fiber interweaving network, multiple through-holes, high heat resistance, chemical resistance, microbial erosion resistance, good physical and mechanical properties, and is cheap and easy to process. characteristics, so that it has maintained a relatively high growth rate in recent years. Mainly used in filter media, geotechnical materials and medical and sanitary products [①Kenichl Suzuki, et al. Polypropylene nonwoven fabric and use thereof[P].US7674732B2.②Jozef Rahel et al Hydrophilization of polypropylene nonwoven fabric using surface barrier discharge[J].Surface and coating technology,2003(169-170):604-608...

Claims

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Application Information

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IPC IPC(8): D06M14/28
Inventor 唐辉张晓春
Owner KUNMING UNIV OF SCI & TECH
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