Thermo-sensitive type amphipathy polymer modified paper base filter membrane and preparation method thereof

Abstract

The invention discloses a thermo-sensitive type amphipathy polymer modified paper base filter membrane. The preparation method of the thermo-sensitive type amphipathy polymer modified paper base filter membrane comprises the following steps that: firstly, taking ethanediamine and methyl acrylate as raw materials to synthesize a dendritic macromolecule of which the end group contains four amidogens; then, utilizing the amidogens to react with filter paper fiber surface hydroxyl to obtain a filter paper base membrane which loads the dendritic macromolecule; then, taking 2-mercaptopropionic acid as chain transfer agent to participate in the polymerization reaction of N-isopropyl acrylamide so as to prepare N-isopropyl acrylamide carboxylic acid derivatives; enabling the end carboxylic group of the N-isopropyl acrylamide carboxylic acid derivatives to react with the amidogen of the dendritic macromolecule under the function of dehydrating agent; introducing thermo-sensitive type polymer onto the surface of the paper base to obtain the thermo-sensitive type filter membrane. The aqueous solution of the thermo-sensitive polymer N-isopropyl acrylamide on the surface of the filter membrane has hydrophilic / lyophobic transformation near a temperature of 31-33 DEG C; under the irradiation of external environment, the effective separation of protein, oil and water phases and the like can be realized.

Description

Technical field [0001] The invention relates to the technical field of membrane separation, in particular to a temperature-sensitive amphiphilic polymer modified paper-based filter membrane and a preparation method thereof. Background technique [0002] With the continuous development of membrane technology, membranes are no longer materials that cannot respond to environmental changes in the traditional sense, but have evolved from popularization to intelligence and functionality. This type of separation membrane will change with the changes of the external environment (such as: pH value, electric field / magnetic field, temperature, chemical substance, light and pressure, etc.). By autonomously adjusting its separation and permeability performance, it shows intelligence and can Adapt to the complex separation environment. Therefore, this type of separation membrane is often called a smart membrane. Its structure can be reversibly changed with changes in external stimuli, resulti...

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Problems solved by technology

[0003] Zhang Jing, Zhang Xiaoyun et al. in their article "Preparation of Cellulose-Based Hybrid Materials and Research on Temperature-Sensitivity Properties", obtained nano-cellulose suspension by concentrated sulfuric acid pretreatment method, and prepared high specific surface area by electrostatic adsorption method. The nanocellulose-silica core-shell hybrid material, and the use of atom transfer radical polymerization to prepare nanocellulose temperature-sensitive material with temperature-sensitive effect, but its sensitivity to external temperature is not high