Preparation method for mesoporous carbon nanotube-cellulose composite temperature-sensitive adsorption material

Abstract

The invention discloses a preparation method for a mesoporous carbon nanotube-cellulose composite temperature-sensitive adsorption material. The preparation method comprises the following steps: subjecting carbon nanotubes to oxidation with sodium bromide and then to treatment and modification with cetyltrimethylammonium bromide; then soaking cellulose with a starch solution and adding alkylphenol ethoxylate for surface activation and modification; then successively carrying out grafting and ultrasonic dispersion so as to prepare a solution; adding a nanometer silica and preparing a cellulose-silica hybrid material by using an electrostatic adsorption method; and then calcining the carbon nanotubes and adding glutaraldehyde for cross-linking so as to prepare the mesoporous carbon nanotube-cellulose composite temperature-sensitive adsorption material. The preparation method provided by the invention is simple in process and low in cost, and can prevent raw materials from agglomeration; and the prepared mesoporous carbon nanotube-cellulose composite temperature-sensitive adsorption material has adsorptivity and excellent mechanical properties.

Description

technical field [0001] The invention relates to the technical field of temperature-sensitive materials, in particular to a method for preparing a mesoporous carbon nanotube composite cellulose temperature-sensitive adsorption material. Background technique [0002] In the past ten years, the development of porous nanomaterials in pharmaceutical formulations has aroused the interest of many researchers. Due to the biocompatibility and easy degradation of cellulose, the application of nanocellulose in pharmaceutics, nanomedicine, and biotechnology has gradually become a hot topic. Due to the different preparation methods, surface modifications and sources of nanocellulose, many different types of nanocellulose are produced, and the rod-shaped nanocellulose particles are called cellulose nanofibrils or nanocrystals. Nanocellulose mainly exists in the form of hydrogel or suspension with high water content, and solid porous nanocellulose airgel can be obtained by freeze-drying o...

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Problems solved by technology

[0003] In Zhang Jing's "Preparation of Cellulose-Based Hybrid Materials and Research on Their Temperature-Sensitive Properties", nanocellulose suspensions were obtained by concentrated sulfuric acid pretreatment, and nanocellulose-dioxide with high specific surface area was prepared by electrostatic adsorption. Silicon hybrid materials, and the use of atom transfer radical reaction to prepare nano-cellulose temperature-sensitive materials with temperature-sensitive effects. The sustained-release properties of the samples were investigated, and it was confirmed that the nano-cellulose temperature-sensitive materials have good sustained-release properties. , but in some mechanical properties such as poor toughness, which greatly limits the application of these temperature-sensitive materials