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A kind of preparation method of nanocellulose airgel microsphere coated filter paper

A technology of nano-cellulose and airgel, which is applied in the direction of surface coating liquid devices, separation methods, chemical instruments and methods, etc., can solve the problems of complicated preparation process and expensive modified filter paper materials, and achieve simple preparation steps, The effect of easy operation of the preparation steps

Inactive Publication Date: 2018-02-02
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these traditional oil-water separation filter papers are relatively cheap and easy to obtain, the materials required to modify the filter paper are expensive, and the equipment and equipment and preparation process are complicated; Oleophobic and superhydrophobic under oil and superhydrophobic in air report of multifunctional materials

Method used

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  • A kind of preparation method of nanocellulose airgel microsphere coated filter paper
  • A kind of preparation method of nanocellulose airgel microsphere coated filter paper
  • A kind of preparation method of nanocellulose airgel microsphere coated filter paper

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Embodiment 1

[0034] A preparation method for nanocellulose airgel microsphere coated filter paper, comprising the following steps: (the schematic diagram of the preparation process is shown in figure 1 )

[0035] (1) Smear the nanocellulose ice crystal microsphere containing PAE resin on the industrial filter paper under low-temperature liquid nitrogen, wherein the content of PAE resin is 1.5% of the nanocellulose ice crystal microsphere weight, then place-50 ℃ and freeze Dry for 12 hours;

[0036] (2) Place the gel-linked coated filter paper obtained by freeze-drying in step (1) in a vacuum environment, and react at 120° C. for 3 hours to obtain nanocellulose airgel microsphere-coated filter paper.

[0037] Silanization modification treatment: the nanocellulose airgel microsphere coating filter paper of step (2) gained and methyldimethoxysilane are placed in the airtight container together, and wherein, the volume of methyldimethoxysilane is 10% of the volume of the filter paper coated ...

Embodiment 2

[0039] A preparation method for nanocellulose airgel microsphere coated filter paper, comprising the following steps:

[0040] (1) Smear the nanocellulose ice crystal microsphere containing PAE resin on the industrial filter paper under low-temperature liquid nitrogen, wherein the content of PAE resin is 1.3% of the nanocellulose ice crystal microsphere weight, then place-55 ℃ and freeze Dry for 12.5 hours;

[0041] (2) Place the gel-linked coated filter paper obtained by freeze-drying in step (1) in a vacuum environment, and react at 118° C. for 3 hours to obtain nanocellulose airgel microsphere-coated filter paper.

[0042] Silanization modification treatment: the nanocellulose airgel microsphere coating filter paper of step (2) gained and methyldimethoxysilane are placed in the airtight container together, and wherein, the volume of methyldimethoxysilane is 8% of the volume of the filter paper coated with nanocellulose airgel microspheres was reacted at 68° C. for 2.8 hour...

Embodiment 3

[0044] A preparation method for nanocellulose airgel microsphere coated filter paper, comprising the following steps:

[0045] (1) Smear the nanocellulose ice crystal microsphere containing PAE resin on the industrial filter paper under low temperature liquid nitrogen, wherein the content of PAE resin is 1.8% of the nanocellulose ice crystal microsphere weight, then place-50 ℃ and freeze Dry for 12 hours;

[0046] (2) Place the gel-linked coated filter paper obtained by freeze-drying in step (1) in a vacuum environment, and react at 125° C. for 3.2 hours to obtain nanocellulose airgel microsphere-coated filter paper.

[0047] Silanization modification treatment: the nanocellulose airgel microsphere coating filter paper of step (2) gained and methyldimethoxysilane are placed in the airtight container together, and wherein, the volume of methyldimethoxysilane is 12% of the volume of the filter paper coated with nanocellulose airgel microspheres was reacted at 73° C. for 3.4 hou...

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Abstract

The invention discloses a preparation method of nano-cellulose aerogel microsphere coated filter paper. The preparation method comprises the following steps that a nano-cellulose ice crystal microsphere containing a cross-linking agent is smeared on industrial filter paper under low temperature liquid nitrogen, frozen and dried, then placed in the vacuum environment and reacted at the temperature of 118-125 DEG C for 3-3.2 h, and the nano-cellulose aerogel microsphere coated filter paper is obtained. The coated filter paper is subjected to silanization modified treatment, and the modified nano-cellulose aerogel microsphere coated filter paper can be obtained. According to the preparation method of the oil-water separation coated filter paper, the micron-level porous nano-cellulose aerogel microsphere is adopted to serve as coating, is a natural holocellulos base, is a novel high performance natural material and has the advantage of a porous structure. The preparation steps are simple and easy to operate, the obtained nano-cellulose aerogel microsphere coated filter paper has the rough surface of a micron / nanometer double layer structure, directly owns underwater super-oleophobic performance and is used for separating water. After simple silicane deposition modification, the nano-cellulose aerogel microsphere coated filter paper can be changed to have the under-oil super-hydrophobic or in-air super-hydrophobic oleophilic characteristics and be used for separating oil.

Description

technical field [0001] The invention belongs to oil-water separation technology, in particular to a preparation method of nanocellulose airgel microsphere coated filter paper for oil-water separation. Background technique [0002] Due to the increasing amount of oily wastewater, frequent oil spill accidents and the continuous development of petroleum and related industries, oily pollutants, especially small oily pollutants, are more difficult to deal with, causing people to pay close attention to aquatic ecosystems and human health. Many techniques, such as filtration, air flotation, oil-absorbing materials, coagulation and flocculation techniques have been developed to remove oily contamination from water. Among them, filtration has become one of the most effective and popular methods for removing oily pollutants from wastewater due to its high efficiency and good economy. At present, there are many methods to prepare materials for oil-water separation, such as chemical et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/24B05D7/00B05D3/10B01D17/02B01D39/14
CPCB01D17/02B01D17/0202B01D39/14B01D2239/0258B01D2239/0471B01D2239/10B05D3/107B05D7/00B05D7/24B05D2203/22
Inventor 张放张辉窦靖邓渝林
Owner NANJING FORESTRY UNIV
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