Исследование электроформования ультратонких волокон из полидифениленфталида

Polymer-solvent system for producing electrospun polydiphenylenephthalide nanofibrous materials is developed. Uniform fibers with diameters up to 0.3 mkm are received. Thermostable filter materials can be produced using developed system.Разработана система полимер-растворитель для получения электроформованных нановолокнистых материалов из полидифениленфталида. Получены однородные волокна диаметром до 0.3 мкм, пригодные для создания на их основе термостойких фильтрующих материалов

Влияние молекулярной массы на процесс электроформования волокнистых материалов, полученных из растворов полиакрилонитрила

In the article influence of the molecular weight of polyacrylonitrile on electrospinning process and also on the diameter and mechanical properties of the obtained fibers and fiber materials are considered. Polymers with molecular weight from 280 000 to 700 000 were investigated. Fibers with a diameter from 200 to 1100 nm were obtained.В статье рассматривается влияние молекулярной массы полиакрилонитрила на диаметр и механические свойства полученных волокон и волокнистых материалов. Исследованы полимеры с молекулярной массой от 280 000 до 700 000. Получены волокна с диаметром от 200-1100 нм

Исследование процесса растяжения жидкой полимерной струи в электрическом поле из растворов полиакрилонитрила

The article considers stretching of liquid polyacrylonitrile jet in electrostatic field. Polymers with molecular weight from 130 000 to 700 000 were investigated. Regularities of stretching of the jet based on polyacrylonitrile solutions were determined.В статье рассматривается процесс растяжения жидкой полимерной струи растворов полиакрилонитрила (ПАН) находящейся в электрическом поле. Исследованы полимеры с молекулярной массой от 130 000 до 700 000. Установлены основные закономерности процесса растяжения струи на основе растворов ПАН

Investigation of polydiphenylenephthalide nanofibers electrospining

Polymer-solvent system for producing electrospun polydiphenylenephthalide nanofibrous materials is developed. Uniform fibers with diameters up to 0.3 mkm are received. Thermostable filter materials can be produced using developed system

Influence of molecular weight on electrospinning of fiber materials obtained from solutions of polyacrylonitrile

In the article influence of the molecular weight of polyacrylonitrile on electrospinning process and also on the diameter and mechanical properties of the obtained fibers and fiber materials are considered. Polymers with molecular weight from 280 000 to 700 000 were investigated. Fibers with a diameter from 200 to 1100 nm were obtained

Experimental-Morphological Study of Several Types of Fibrillar Structured Drainages for Glaucoma Surgery

Purpose: based on the results of an experimental study in vivo, to determine the optimal type of fibrillar structured drainages for glaucoma surgery.Material and methods. An experimental morphological study was performed on 32 rabbits of the chinchilla breed, which were divided into 4 groups of 8 animals each. The rabbits were implanted with fibrillar structured drains from polyurethane, polyethylene terephthalate, polyamide, polylactide. In the postoperative period, a postoperative inflammatory reaction was assessed. After removing the animals from the experiment, the eyes were subjected to morphological examination.Results. In rabbits with drainage from polyurethane, a mild congested hyperemia was noted in visual evaluation compared with the pair eye during the entire follow-up period. The eye reaction to the operation was regarded as a 1st degree. In more distant terms, there was a proliferation of subconjunctival tissue in the projection of the operation zone. In histological examination, the implant was represented by thin fibrous structures throughout the volume of drainage, a uniform distribution of macrophages, lymphocytes, among the fibers. In rabbits with drainage from polyethylene terephthalate, the reaction of the eyeball to the implantation of the polymeric material corresponded to the 0 degree. When a histological study was carried out along the periphery of the drainage, a thin capsule was formed. In rabbits with drainage from polyamide, the reaction of the eyeball corresponded to 1 degree. Histological examination showed that the fibrous structure of drainage was practically not determined, an abundance of cellular elements was observed throughout the drainage: macrophages and multinucleate giants predominated, fibroblasts, fibroblasts, lymphocytes, and newly formed connective tissue fibers between the drainage fibers were present. When analyzing the results obtained during the implantation of the matrix from the polylactide, the reaction of the eyeball corresponded to the 0 degree. Histological examination showed the preservation of fibrous structure of drainage, a moderate accumulation of macrophages was determined between the fibers, single giants, single lymphocytes were present.The conclusion. Fibrillar structured drains based on polylactide due to a stable highly porous structure, high biocompatibility and biodegradability create favorable conditions for transport of aqueous humor and formation of outflow pathways

Investigation of stretching process of liquid jet being in electrostatic field from polyacrylonitrile solutions

The article considers stretching of liquid polyacrylonitrile jet in electrostatic field. Polymers with molecular weight from 130 000 to 700 000 were investigated. Regularities of stretching of the jet based on polyacrylonitrile solutions were determined