a tio 2 /Preparation method of cellulose nanocomposite membrane and its composite membrane and application

A nano-composite and cellulose technology, applied in the field of functional materials, can solve the problems of poor adsorption capacity and achieve the effect of maintaining activity, uniform distribution of two phases, and excellent adsorption performance

Active Publication Date: 2020-05-01
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the technical problem that the modified cellulose is used as the raw material of the composite membrane in the prior art, and the agglomeration of nano-ions results in poor adsorption capacity, the present invention provides a TiO 2 / The preparation method of cellulose nanocomposite membrane and its composite membrane and application, its purpose is to prepare TiO with excellent adsorption performance 2 / Cellulose nanocomposite membrane material, in the state of liquid co-solution, the two phases are more evenly distributed, and the preparation method is simple, the operating temperature is not high, it is not easy to cause the degradation of organic components, and it is easy to maintain its activity

Method used

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  • a tio <sub>2</sub> /Preparation method of cellulose nanocomposite membrane and its composite membrane and application
  • a tio <sub>2</sub> /Preparation method of cellulose nanocomposite membrane and its composite membrane and application
  • a tio <sub>2</sub> /Preparation method of cellulose nanocomposite membrane and its composite membrane and application

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Embodiment 1

[0022] Embodiment one: a kind of TiO provided by the present invention 2 / The preparation method of cellulose nanocomposite membrane comprises the following steps, (1) adopting sol-gel method to prepare TiO 2 Sol: Prepare TiO with dimethylacetamide DMAC solvent system and glacial acetic acid as chelating agent 2 Sol;

[0023] (2) Select pineapple leaf cellulose as the cellulose matrix, soak the pineapple leaf cellulose in pure water and stir, then add methanol to soak and stir, then use dimethylacetamide DMAC to exchange methanol to activate the pineapple leaf cellulose; Good cellulose is dissolved in the LiCl / dimethylacetamide DMAC system solution to obtain a homogeneous cellulose solution;

[0024] (3) The composite membrane was prepared by liquid homogeneous forming method.

[0025] Its performance of the composite membrane that the present invention obtains is as Figure 1-3 as shown, figure 1 It is the SEM map of the composite film. It can be seen from the figure tha...

Embodiment 2

[0026] Embodiment two: a kind of TiO provided by the present invention 2 / The preparation method of cellulose nanocomposite membrane comprises the following steps, (1) adopting sol-gel method to prepare TiO 2 Sol: Prepare TiO with dimethylacetamide DMAC solvent system and glacial acetic acid as chelating agent 2 Sol;

[0027] (2) Select pineapple leaf cellulose as the cellulose matrix, soak the pineapple leaf cellulose in pure water and stir, then add methanol to soak and stir, then use dimethylacetamide DMAC to exchange methanol to activate the pineapple leaf cellulose; Good cellulose is dissolved in the LiCl / dimethylacetamide DMAC system solution to obtain a homogeneous cellulose solution;

[0028] (3) The composite membrane was prepared by liquid homogeneous forming method.

[0029] Further, TiO is prepared in the step (1) 2 The specific method of the sol includes: mixing tetrabutyl titanate and dimethylacetamide DMAC at a molar ratio of 1:1, adding glacial acetic acid ...

Embodiment 3

[0035] Embodiment three: a kind of TiO provided by the present invention 2 / The preparation method of cellulose nanocomposite membrane comprises the following steps, (1) adopting sol-gel method to prepare TiO 2 Sol: Prepare TiO with dimethylacetamide DMAC solvent system and glacial acetic acid as chelating agent 2 Sol;

[0036](2) Select pineapple leaf cellulose as the cellulose matrix, soak the pineapple leaf cellulose in pure water and stir, then add methanol to soak and stir, then use dimethylacetamide DMAC to exchange methanol to activate the pineapple leaf cellulose; Good cellulose is dissolved in the LiCl / dimethylacetamide DMAC system solution to obtain a homogeneous cellulose solution;

[0037] (3) The composite membrane was prepared by liquid homogeneous forming method.

[0038] Further, TiO is prepared in the step (1) 2 The specific method of the sol includes: mixing tetrabutyl titanate and dimethylacetamide DMAC at a molar ratio of 1:1, adding glacial acetic acid...

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Abstract

The invention discloses a preparation method of a TiO2 / cellulose nano-composite film. The preparation method comprises the following steps: (1) preparing a TiO2 sol through a sol-gel method; (2) choosing cellulose of a pineapple leaf as a cellulose matrix to prepare a cellulose homogeneous solution; (3) preparing the composite film through a liquid homogeneous phase forming method. The invention also discloses an application of the composite film, and the composite is used as a ceramic surface coating. The preparation method has the advantages that the liquid homogeneous phase forming method is used to prepare a TiO2 / cellulose nano-composite film material with excellent adsorption performances, and the distribution of two phases is evener under the liquid consolute state. The method is simple in process, the requirement on the operation temperature is not high, the degradation of an organic ingredient is not caused easily, and the activity of the TiO2 / cellulose nano-composite film is easy to keep.

Description

technical field [0001] The invention belongs to the technical field of functional materials, specifically a TiO 2 Preparation method of / cellulose nanocomposite membrane and its composite membrane and application. Background technique [0002] The composite membrane is a separation membrane composed of a microporous membrane or an ultrafiltration membrane as a supporting layer, and a dense homogeneous membrane with a thickness of only 0.1 to 0.25 μm as a barrier layer on its surface, so that the amount of material permeated is greatly improved. Big increase, TiO 2 / Cellulose nanocomposite membrane is a kind of composite membrane with the function of adsorbing heavy metal ions. It is because of this adsorption that TiO 2 / Cellulose nanocomposite membrane can treat wastewater very well and has a good market prospect. The existing cellulose-based composite membrane technology can be divided into in-situ composite method, self-assembly method (SA), direct dispersion method an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08K3/22C08L1/02
CPCC08J5/18C08K3/22C08K2003/2241C08L2201/06C08L2203/16C08L1/02
Inventor 王飞李积华魏晓奕常刚夏文李特
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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