| Abstract [eng] |
The forming methods of nano- and microfibers, the equipment of microfibers web developing and the usage of these microfibers webs were discussed in this master’s project. The microfibers webs were manufactured using an electrospinning method of PVA solution. Mineral additives and additives of some plants can be added to the polymeric solution seeking to change the features and application of the microfibers webs. There were used several kinds of plant additives: juice of Taraxacum leaves and stems; powder of dried Taraxacum roots and blossoms. These additives were added to PVA polymeric solution. The 38 microfibers webs with different concentration of Taraxacum additives were made changing the speed of ground material, the distance between electrodes and shape of the electrodes. In this study the influence of the parameters of the electrospinning process to the structure of microfibers webs and the influence of viscosity of the polymeric solutions was estimated; the influence increases with the increasing of concentration of Taraxacum powder in the solution. Particles of grinded and dried Taraxacum blossoms or roots, which are shrouded with polymeric solution, are located on microfiber web. In other case, they are distributed between microfibers and some other microfibers are going through the bigger plant particles. It was determined that increasing of the speed of ground material effects the structure of webs. The structure of microfiber webs with Taraxacum additives becomes rarer. It was found that concentration of Taraxacum blossoms powder up to 1% does not influence on the diameter of microfibers. If the concentration of additives in the solution is increased, the diameter of microfibers decreases. |
