Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi University, Mühendislik Fakültesi, Kimya Mühendisliği, Turkey
Approval Date: 2022
Thesis Language: Turkish
Student: Tuğba Arda
Supervisor: Fatih Akkurt
Abstract:
Our country has the world's largest boron mineral reserves. For this reason, it takes its place among the research topics whose importance is increasing day by day. With the developing technology, the need for end products that are environmentally friendly, low in cost, high in applicability and wide usage area is increasing. In this context, boron end products with high commercialization and economic contribution potential and wide application areas are important. Fluoroborates are also among these products; It is used in different fields as a fire retardant material in fabrics, catalyst in some reactions, and pest control. Various methods are available for the synthesis of these products. In this study, the synthesis of sodium fluoroborate, a type of fluoroborate, was carried out by two different methods. In the synthesis by the mechanochemical method, which is one of these two methods; sodium fluoride and elemental boron were used as reactants. Optimum conditions were determined for sodium fluoroborate obtained by mechanical grinding in a ball mill at different mole ratios and synthesis times. Purification was carried out by removing unwanted by-products from the synthesized product. Based on the results of the studies, the best data were obtained with the mechanochemical reaction that lasted for 5000 minutes in a ball mill with a mole ratio (nB/nNaF) of 2.02:1. Sodium fluoroborate was produced with a purity of 19.75% and a yield of 45.7%. In the wet method, which is the second method for comparison purposes, sodium carbonate and fluoroboric acid were used as reactants. FT-IR, XRD and particle size measuring device were used to examine the material structure. Sodium fluoroborate in different concentrations was found to be a very good flame retardant when the fire retardant property on fabrics was studied with the LOI test.
Keywords : Sodium fluoroborate, mechanochemical method, flame retardant,
particle size distribution, XRD