RHEOLOGICAL AND ELECTRICAL PROPERTIES OF GELS WITH CARBON NANOTUBES AND OXYETHYLATED ALKYLPHENOL
Journal: HERALD OF TECHNOLOGICAL UNIVERSITY
Rubrics: 1. CHEMISTRY
Authors:
1.
KNITU
2.
KNITU
3.
Kazan National Research Technological University
4.
KNITU
Type:
Article
Pages:
from 10
to 15
Status:
Language:
Russian
Keywords:
CARBON NANOTUBES, NANOPARTICLE DISPERSIONS, GEL COMPOSITIONS, NONIONIC SURFACTANTS, GEL VISCOSITY, GEL ELECTRICAL CONDUCTIVITY
Abstract:
Gel systems are widely used in medicine and cosmeceutics as effective means for delivery of therapeutic agents and biologically active substances (BAS) to the human body through the skin. The electrical and rheological properties of gels can be improved by the introduction and uniform distribution of carbon nanotubes (CNTs) in the volume of gel systems. In this regard, the aim of this work was to obtain polymer gels with the addition of CNTs and to study their electric and rheologic properties. The introduction of carbon nanotubes into the volume of gel systems was carried out in the form of aqueous dispersions. Nanoparticle dispersions were obtained by ultrasonic treatment of nanotubes in water and aqueous solutions of ethoxylated alkylphenol. The rheological characteristics of the gel compositions were studied by rotational viscometry. It was found that the addition of oxyethylated alkylphenol and carbon nanotubes in the gel composition leads to a decrease in viscosity and a decrease in the yield strength of the system by 1.1-3.7 times, as well as a decrease in the area of the hysteresis loop by 1.9-4.8 times with an increase in the content of carbon nanotubes and nonionic surfactants compared to the base composition. The specific electrical conductivity of the gel systems was determined by means of a conductometer. It has been established that with increasing CNT content, the specific electrical conductivity of gel systems increases by 1.7-1.9 times compared to the base composition. The results of the work indicate that gels with the highest content of CNTs, obtained in the presence of nonionic surfactant, can be used as a basis for creating transdermal systems for drugs and biologically active substances.
Gel systems are widely used in medicine and cosmeceutics as effective means for delivery of therapeutic agents and biologically active substances (BAS) to the human body through the skin. The electrical and rheological properties of gels can be improved by the introduction and uniform distribution of carbon nanotubes (CNTs) in the volume of gel systems. In this regard, the aim of this work was to obtain polymer gels with the addition of CNTs and to study their electric and rheologic properties. The introduction of carbon nanotubes into the volume of gel systems was carried out in the form of aqueous dispersions. Nanoparticle dispersions were obtained by ultrasonic treatment of nanotubes in water and aqueous solutions of ethoxylated alkylphenol. The rheological characteristics of the gel compositions were studied by rotational viscometry. It was found that the addition of oxyethylated alkylphenol and carbon nanotubes in the gel composition leads to a decrease in viscosity and a decrease in the yield strength of the system by 1.1-3.7 times, as well as a decrease in the area of the hysteresis loop by 1.9-4.8 times with an increase in the content of carbon nanotubes and nonionic surfactants compared to the base composition. The specific electrical conductivity of the gel systems was determined by means of a conductometer. It has been established that with increasing CNT content, the specific electrical conductivity of gel systems increases by 1.7-1.9 times compared to the base composition. The results of the work indicate that gels with the highest content of CNTs, obtained in the presence of nonionic surfactant, can be used as a basis for creating transdermal systems for drugs and biologically active substances.
Keywords:
CARBON NANOTUBES, NANOPARTICLE DISPERSIONS, GEL COMPOSITIONS, NONIONIC SURFACTANTS, GEL VISCOSITY, GEL ELECTRICAL CONDUCTIVITY
CARBON NANOTUBES, NANOPARTICLE DISPERSIONS, GEL COMPOSITIONS, NONIONIC SURFACTANTS, GEL VISCOSITY, GEL ELECTRICAL CONDUCTIVITY
