Polypropylene fiber reinforced lipophilic modification method

A technology of polypropylene fiber and microporous polypropylene, which is applied in fiber treatment, fiber type, textile and papermaking, etc. It can solve the problems of poor stability and inapplicability of high-efficiency lipophilic modification of polypropylene fiber, so as to reduce interfacial energy, Enhanced lipophilic performance is stable and reliable, and the effect of low material cost

Active Publication Date: 2022-03-15
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor stability of the polypropylene fiber modification process in this method, and the modified polypropylene fiber has hydrophilic and oleophobic properties, it is not suitable for the high-efficiency lipophilic modification of polypropylene fiber.

Method used

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  • Polypropylene fiber reinforced lipophilic modification method
  • Polypropylene fiber reinforced lipophilic modification method
  • Polypropylene fiber reinforced lipophilic modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: Weigh 200g of polypropylene fiber raw material (100μm in diameter), and first perform the following pre-cleaning treatment to remove the original oily substances and other impurities on the fiber surface:

[0033] 1> Soak in 50% (volume fraction) acetone solution and 30% (volume fraction) ethanol solution successively for 1 hour;

[0034] 2>Transfer to deionized water for ultrasonic cleaning for 20 minutes, drain and set aside.

[0035]Transfer the pre-cleaned polypropylene fibers to 30% (mass fraction) sulfuric acid solution and soak for 1 hour. After sulfuric acid solution treatment, the polypropylene fibers were taken out, rinsed three times with 30% (volume fraction) ethanol solution and deionized water successively, and dried at 60° C. for 8 hours in a thermostat.

[0036] Step 2: using gradient hydrogen peroxide solution to carry out hydroxylation modification on the microporous polypropylene fiber. The specific operation process is to place the micropor...

Embodiment 2

[0041] After the polypropylene fiber raw material was pre-cleaned as described in Example 1, it was soaked in 50% (mass fraction) sulfuric acid solution for 2 hours. After being treated with sulfuric acid solution, the polypropylene fibers were taken out, rinsed three times with 30% (volume fraction) ethanol solution and deionized water successively, and dried in a thermostat at 60°C for 8 hours.

[0042] The microporous polypropylene fibers were modified by hydroxylation as described in Example 1 to obtain hydroxyl-modified polypropylene fibers.

[0043] As described in Example 1, the hydroxyl-modified polypropylene fibers were placed in 1000 mL of Tri-HCl buffer solution, 50 g of dopamine hydrochloride was added thereto, and the reaction was fully stirred (200 rpm) for 8 hours to obtain amino-modified polypropylene fibers. After the reaction, the amino-modified polypropylene fiber was washed 3 times with excess deionized water, and dried in a thermostat at 40° C. for 4 hours...

Embodiment 3

[0047] According to Example 2, the amino-modified polypropylene fiber obtained in Step 3 was added to an acetone solution containing 15% (mass fraction) of silane coupling agent KH-550 for silanization modification. The modification process was carried out under the condition of constant temperature stirring (80°C, 150rpm) for 6 hours, and a saturated glutaraldehyde n-octanol solution accounting for 1% (mass fraction) of the acetone solution was used as a crosslinking agent to realize the amination of the surface of the polypropylene fiber. Silyl graft copolymerization. Finally, the silanized modified polypropylene fiber was washed twice with 10% (volume fraction) ethanol solution and deionized water, and dried at 30°C for 12 hours in an incubator to obtain a reinforced lipophilic modified polypropylene fiber. fiber.

[0048] A large number of micropores appeared on the surface of the reinforced lipophilic modified polypropylene fiber obtained under this condition, the specif...

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Abstract

The invention belongs to the technical field of material modification, and specifically relates to a method for reinforcing lipophilic modification of polypropylene fibers, which uses molecular self-assembly technology and chemical graft copolymerization technology to strengthen the lipophilic performance of polypropylene fibers. The method comprises the following steps: 1) performing sulfuric acid immersion treatment on raw material polypropylene fibers to obtain microporous polypropylene fibers; 2) performing gradient hydrogen peroxide solution immersion treatment on microporous polypropylene fibers to obtain hydroxyl-modified polypropylene fibers; Assembled to obtain amino-modified polypropylene fibers; 4) based on chemical graft copolymerization technology, combined with silane coupling agent, to obtain reinforced lipophilic modified polypropylene fibers. The invention improves the affinity performance and storage function of the interface to the organic phase by reserving microporous structure and grafting hydrophobic hyperbranched polymer on the surface of the polypropylene fiber, and obviously improves the lipophilic property of the polypropylene fiber.

Description

technical field [0001] The invention relates to a polypropylene fiber reinforcement, in particular to a modification method for enhancing the lipophilic performance of polypropylene fibers by using molecular self-assembly technology and chemical graft copolymerization technology. The invention belongs to the technical field of material modification. Background technique [0002] In recent years, with the rapid development of the processing and manufacturing industry, large volume, highly toxic and refractory industrial wastewater has caused a continuous and serious impact on my country's ecological environment. As a typical refractory industrial wastewater, oily emulsified wastewater mainly comes from refractory organic pollutants formed by decomposed emulsified oil and emulsifiers. These organic pollutants are in the form of emulsified oil droplets in the water body and The water molecules are combined with each other, which is extremely stable and extremely difficult to h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/50D06M11/55D06M15/61D06M15/643D06M101/20
CPCD06M11/55D06M11/50D06M15/61D06M15/6436D06M2101/20
Inventor 王炳捷白志山田涛杨晓勇赵生豪古文全
Owner EAST CHINA UNIV OF SCI & TECH
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