Cross linked Core-shell Silica Nanoparticles Mechanical, Structural & Viscoelastic Behavior

Shell cross-linked core-shell nanoparticles (SCCSNs) were prepared via miniemulsion polymerization of styrene in the presence of silane modified inorganic silica. The polystyrene (PS) shell of 69.8% in weight fraction was cross-linked using divinylbenzene. SCCSNs were spherical with a diameter distribution from 37 to 96 nm determined by dynamic light scattering. Dynamic rheology of SCCSNs suspended in PS/toluene solution was compared with that of suspensions of naked silica. The critical strain for onset of rheological nonlinearity was independent of SCCSN concentration above a concentration threshold, which differs from the silica suspensions. Linear dynamic rheological investigation revealed that SCCSN suspensions with a PS volume fraction of 25% were fluid-like at low particle concentrations while suspensions containing 4.5 vol% SCCSNs formed a gel-like structure. On the contrary, the silica suspensions with 20.0 vol% PS underwent a fluid-to-solid-like transition with increasing silica concentration. Reasons for the different rheological behaviors of the naked silica and SCCSN suspensions are discussed

Effective Processing Time & Cost Management of Dyes, Chemicals & Utilities Used in the Combed & Compact Knit Fabric Colouration in the Dyeing Textile Industries

Industrialization is an inevitable feature of economic intensification in a developing country. The textile dyeing industries uses huge amount of water, steam electricity and substantial quantities of complex chemicals. Textile dyeing house operating in this sector are facing significant challenges to reduce their natural resources and energy consumption. The main purposes of this investigation is to reduce the process time, cost of chemicals, cost of utilities and cost of effluent treatment. In the very beginning of this research, properties of compact and combed yarn were investigated. Then wet processing and process time required for both the compact and combed fabric are compared. Later on different costs associated with the wet processing of both compact and combed yarn fabric are also analyzed. Through this work it is tried to focus on the use of compact yarn fabric instead of combed yarn could be the best possible way to meet the challenges faced by the textile dyeing as well as textile industrie