A kind of aminated glass fiber and its preparation method and application

A glass fiber and amination technology, which is applied in the field of aminated glass fiber and its preparation, can solve the problem of poor copper ion adsorption and regeneration effect, low silicon hydroxyl content on the surface of glass fiber, affecting the stability of the graft layer and Effect and other problems, to achieve the effect of connecting more adsorption sites, short adsorption and elution time, and overcoming poor wear resistance

Active Publication Date: 2021-11-02
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of embedding mainly depends on physical force, and the stability of the embedding layer is not good, which affects the regeneration effect. It can be expected that this kind of modified glass fiber is difficult to be used for water purification.
Iwai studied the embedding of polyethyleneimine and humic acid on glass fiber and used it to adsorb and remove copper ions in water. Since this is also physical embedding, the adsorption capacity and regeneration effect of copper ions are not good, so physical embedding cannot be used Technical route Manufacture of modified glass fiber for water treatment
The silanol group on the surface of glass fiber is the main group for grafting, but the content of silanol on the surface of the original glass fiber is very low, which affects the stability and effect of the grafted layer

Method used

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  • A kind of aminated glass fiber and its preparation method and application
  • A kind of aminated glass fiber and its preparation method and application
  • A kind of aminated glass fiber and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 glass fiber grafting polyethylenimine

[0038] (1) Alkali treatment

[0039] Considering the diameter of the fluid adsorption fixed bed, the original alkali-free glass fiber is cut into fiber segments whose length is not greater than the diameter of the fluid adsorption fixed bed, submerged in deionized water, and washed in a constant temperature oscillating stirrer at a shaking speed of 80r / min at room temperature Twice, 30min each time, dry the washed glass fiber at 80°C to a constant weight. Then immerse 0.2kg of glass fibers in 5L of 3mol / L sodium hydroxide solution, and heat in a water bath at 80°C for 2 hours in the air where carbon dioxide is removed to obtain alkali-treated glass fibers. Then take out the glass fiber and filter it dry until it does not drip, wash the residual alkali on the surface of the glass fiber with deionized water, and the alkali solution can be reused.

[0040] (2) Glass fiber grafted glycidyl ether oxypropyl trimethoxysila...

Embodiment 2

[0046] The preparation of embodiment 2 glass fiber graft polyethyleneimine

[0047] (1) Alkali treatment

[0048] Considering the diameter of the fluid adsorption fixed bed, cut the original alkali-free glass fiber into a fiber segment whose length is not greater than the diameter of the fluid adsorption fixed bed, immerse it in deionized water, and stir it at room temperature in a constant temperature oscillating stirrer with a shaking speed of 80r / min Wash twice, 30min each time. The washed glass fibers were dried at 80 °C to constant weight. Soak 0.1kg of glass fibers in 2.5L of 3mol / L sodium hydroxide solution, heat in a water bath at 80°C and stir for 2 hours with air that removes carbon dioxide to obtain alkali-treated glass fibers. Then take out the glass fiber and filter it dry until it does not drip, wash the residual alkali on the surface of the glass fiber with deionized water, and the alkali solution can be reused.

[0049] (2) Glass fiber grafted glycidyl ether...

Embodiment 3

[0053] Embodiment 3 Preparation of cross-linked product of glass fiber grafted polyethyleneimine and polyvinyl chloride

[0054] Present embodiment step (1) and step (2) are with embodiment 1

[0055] (3) Preparation of cross-linked products of polyethyleneimine and polyvinyl chloride

[0056] Take 120g of PVC and dissolve it into 0.75L N,N-dimethylacetamide several times in small amounts, then add it to a 2.5L three-neck flask, blow in nitrogen gas for 5min, and heat to 80°C in a water bath. In addition, dissolve 0.36kg PEI into 0.75L N,N-dimethylacetamide, and then place it in a separatory funnel; slowly add PEI solution to PVC solution within 5 minutes, and react for 1 hour until the state of the cross-linked product becomes viscous shape. The crosslinked mixture was transferred to 0.5L deionized water / absolute ethanol (1:1) mixed solvent to precipitate the crosslinked product of polyethyleneimine and polyvinyl chloride. Mix in a shaker for 5 minutes, centrifuge, and dec...

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Abstract

The invention belongs to the technical field of polymer materials, and specifically discloses an aminated glass fiber and a preparation method and application thereof. The specific preparation steps are: (1) after mixing glycidyl ether oxypropyl trimethoxysilane and hydrochloric acid solution, adding alkali-treated glass fiber, then heating reaction under protective atmosphere, and obtaining grafted glycidol after the reaction is completed The glass fiber of etheroxypropyl trimethoxysilane; (2) the cross-linked product of polyethyleneimine or polyethyleneimine and polyvinyl chloride in solvent N,N-dimethylacetamide with step (1) The obtained glass fiber grafted with glycidyl ether oxypropyl trimethoxysilane is mixed and reacted, and after the reaction is completed, it is dried to obtain aminated glass fiber. The grafted polyethyleneimine-modified glass fiber adsorbent obtained by the invention is covalently connected to the graft layer and the glass fiber, and the graft layer is stable. Secondly, because the adsorption sites are all on the surface of the adsorbent, the adsorption and elution time are short, the adsorption capacity is strong, and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an aminated glass fiber and its preparation method and application. Background technique [0002] Glass fiber is an inorganic non-metallic material with excellent performance. It has good insulation, strong heat resistance, oxidation resistance, high mechanical strength, and good water filtration, but poor wear resistance. The diameter of glass fiber monofilament is several microns to more than 20 microns, equivalent to 1 / 20-1 / 5 of a hair, and has a large specific surface area. The advantage of powder adsorbent is that it has a large specific surface area, but it is difficult to recover and cannot be used in a fixed adsorption bed with convenient operation, while granular adsorbent can be used in a fixed adsorption bed, but it has a large diffusion resistance, low concentration in the inner layer of particles, and small adsorption capacity. Glass fiber is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C25/40C03C25/28B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/22C02F1/285C02F2101/20C03C25/28C03C25/40
Inventor 叶林顺王雅妮梁泽雄
Owner JINAN UNIVERSITY
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