Synthetic method of polyaniline nanofiber with helical structure

Abstract

The invention provides a synthetic method of polyaniline nanofiber with a helical structure. The method comprises the following steps: firstly synthesizing N, N'-2(4-phenylene diamine)-1 and 4-phenylene diamine; secondly taking N, N'-2(4-phenylene diamine)-1 and 4-phenylene diamine as a polymerization reaction catalyst, chiral camphor sulfonic acid as an inducer and a doping agent, and ammonium persulfate as an oxidizing agent; finally synthesizing the polyaniline nanofiber with the helical structure through adopting the chemical oxidative polymerization. According to the synthetic method, the chiral camphor sulfonic acid is adopted as the doping agent to be interacted with the polyaniline main chain and to induce the polyaniline main chain to form the helical structure, and meanwhile, N, N'-2(4- phenylene diamine)-1 and 4-phenylene diamine with the oxidation potential lower than that of monomer aniline is further added to serve as a 'seed' and catalyze the polymerization reaction, so that the polymerization rate is greatly increased with the addition of phenylene diamine, and besides, heterogeneous nucleation is under restriction in the polymerization process, giving rise to the predominance of homogeneous nucleation, so that secondary growth is inhibited, the formation of the polyaniline helical structure is facilitated, and the optical activity of polyaniline is greatly improved.

Description

technical field

[0001] The invention relates to a method for synthesizing a polymer, in particular to a method for synthesizing polyaniline nanofibers with a helical structure. Background technique

[0002] The helical structure ubiquitous in important biopolymers (such as proteins, nucleotides, and DNA) plays a pivotal role in the metabolic processes of animals and plants, in which the active sites of enzymes are almost exclusively bound to an opposite Enantiomeric chiral substrate binding. Chiral control is often a critical factor in the design of effective drugs and pesticides. Therefore, people have been interested in the design and synthesis of chiral polymers for decades, and a large number of organic polymers have been synthesized and applied in many different fields, such as chiral sensors, chiral catalysts, and enantio Chromatographic separation of body drugs.

[0003] In 1985, Baughman et al. proposed that pure substituents with a single optical activity or chir...

Images