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Porous cellulose acetate composite micro/nano fiber membrane, centrifugal spinning preparation method and application of membrane in adsorbing heavy metal ions

A technology of cellulose acetate and nanofiber membranes, which is applied to artificial filaments made of cellulose derivatives, fiber treatment, chemical instruments and methods, etc., can solve the problems of low production efficiency and large amount of consumables, and achieve the preparation method Simple, high porosity, large specific surface area effect

Inactive Publication Date: 2019-10-01
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the nano-acetate fibers are prepared by electrospinning, and its disadvantages are low preparation efficiency and large amount of consumables

Method used

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  • Porous cellulose acetate composite micro/nano fiber membrane, centrifugal spinning preparation method and application of membrane in adsorbing heavy metal ions
  • Porous cellulose acetate composite micro/nano fiber membrane, centrifugal spinning preparation method and application of membrane in adsorbing heavy metal ions
  • Porous cellulose acetate composite micro/nano fiber membrane, centrifugal spinning preparation method and application of membrane in adsorbing heavy metal ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Construction of Porous Cellulose Acetate Micro / Nanofibrous Membranes by Centrifugal Spinning

[0045] (1) Accurately weigh four parts of 1.3g cellulose acetate (CA) (wherein the molar mass M=100000g / mol of CA) with an analytical balance and place them in four 20ml sample bottles respectively, then pipette into the four sample bottles respectively. Take 5.22g DCM and 3.48g DMSO (mass ratio is 6:4), 6.09g DCM and 2.61g DMSO (mass ratio is 7:3), 6.96g DCM and 1.74gDMSO (mass ratio 8:2), 7.83g DCM and 0.87g DMSO (mass ratio: 9:1), seal the sample bottle with plastic wrap, raw tape and parafilm, heat to 35°C and stir for more than 12 hours to finally obtain a centrifugal spinning solution with evenly dispersed CA.

[0046] (2) adopt figure 1 The centrifugal spinning device shown is used for centrifugal spinning, the set speed is 8000rpm / min, the distance between the collecting rods is 10cm, and the diameter of the spinneret holes is 0.4mm. Take 5ml of the spinning solution ...

Embodiment 2

[0048] A kind of centrifugal spinning preparation method of porous cellulose acetate composite micro / nano fiber membrane, the specific steps of the method are as follows:

[0049] (1) Accurately weigh 1.3g CA, 0.05g (0.5%) MMT (placed in a 20ml sample bottle, pipette 6.92g DCM and 1.73g DMSO (mass ratio 8:2) into the sample bottle with an analytical balance. The sample bottle was sealed with plastic wrap, raw material tape and parafilm, heated to 35°C and stirred for more than 12 hours to finally obtain a centrifugal spinning solution with evenly dispersed CA.

[0050] (2) adopt figure 1 The centrifugal spinning device shown is used for centrifugal spinning, the set speed is 8000rpm / min, the distance between the collecting rods is 10cm, and the diameter of the spinneret holes is 0.4mm. Take 5ml of the spinning solution sample in the spinning head, turn on the motor, and pass through the collecting rods. A porous CA composite micro / nanofibrous membrane was obtained.

Embodiment 3

[0052] A kind of centrifugal spinning preparation method of porous cellulose acetate composite micro / nano fiber membrane, the specific steps of the method are as follows:

[0053] (1) Accurately weigh 1.3g CA and 0.1g (1%) MMT with an analytical balance and place it in a 20ml sample bottle, pipette 6.88g DCM and 1.72g DMSO (mass ratio 8:2) into the sample bottle, and the sample The bottle is sealed with a plastic wrap, a raw material tape and a sealing film, heated to 35° C. and stirred for more than 12 hours to obtain a centrifugal spinning solution.

[0054] (2) adopt figure 1 The centrifugal spinning device shown is used for centrifugal spinning, the set speed is 8000rpm / min, the distance between the collecting rods is 10cm, and the diameter of the spinneret holes is 0.4mm. Take 5ml of the spinning solution sample in the spinning head, turn on the motor, and pass through the collecting rods. A porous CA composite micro / nanofibrous membrane was obtained.

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Abstract

The invention relates to a micro / nano fiber membrane, in particular to a porous cellulose acetate composite micro / nano fiber membrane, a centrifugal spinning preparation method and application of themembrane in adsorbing heavy metal ions, and belongs to the technical field of preparation of functional nano fibers. The method of the invention comprises the steps of (1) preparing a centrifugal spinning solution, to be specific, dissolving the raw materials of CA (cellulose acetate) and MMT (montmorillonite) in a mixed solvent of DCM (dichloromethane) and DMSO (dimethyl sulfoxide), and stirringto obtain the centrifugal spinning solution evenly dispersed, wherein CA has a mass concentration of 12-16% by weight, and MMT has a mass fraction of 0.1-3%; (2) performing centrifugal spinning, to bespecific, performing centrifugal spinning with the centrifugal spinning solution prepared in the step (1) to obtain the porous cellulose acetate composite micro / nano fiber membrane. The preparation method of the invention is simple and is suitable for preparing quickly and efficiently porous cellulose acetate composite micro / nano fiber membranes capable of adsorbing heavy metal ions.

Description

technical field [0001] The invention relates to a micro / nano fiber membrane, in particular to a porous cellulose acetate composite micro / nano fiber membrane, a centrifugal spinning preparation method and its application in heavy metal ion adsorption, belonging to the technical field of functional nanofiber preparation. Background technique [0002] In recent years, especially in developing countries, with the rapid development of modern industries such as electroplating, mining, chemical fertilizers, leather, batteries, papermaking and pesticides, a large amount of wastewater containing heavy metals has been discharged directly or indirectly into the environment. The pollution of water resources by ions has become a prominent and severe environmental problem. Common heavy metal ions include copper Cu(II), lead Pb(II), nickel Ni(II), mercury Hg(II), etc. Since these ions cannot be degraded and decomposed naturally in nature, they are found in soil, rivers and lakes and other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D13/00D01D5/18D04H3/013D04H3/033D01F2/28D01F1/10C02F1/28B01J20/24B01J20/30C02F101/20
CPCB01J20/12B01J20/24C02F1/28C02F2101/20D01D5/18D01D13/00D01F1/10D01F2/28D04H3/013D04H3/033
Inventor 李永强母情源张贤王娟任琳琳黄超
Owner ZHEJIANG SCI-TECH UNIV
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