จำนวน Repository ( 127 )
การพัฒนาสารข้นจากแป้งกลอย
Thickening agent is a substance when it was using to increase viscosity of an aqueous solution but other properties were not substantially modifying. it had major roles in textile printing process via adjust the print paste viscosity. transfer dye and auxiliaries into fabric. Thickening agent type starch had used in textile printing but it was a troublesome production also high cost. In this research had and feasible study to placement of dry Dioscorea hispida Dennst for textile printing processes such as direct dye and reactive dye printing on cotton woven fabric acid dye printing on nylon woven fabric and disperse dye on polyester woven fabric. The results found dry Dioscorea hispida Dennst successfully applied used as thickening agent stable time to collected as 3 days. The textile printing quality and viscosity propertied equivalent as the industrial thickener at 10% of weight print paste (owp). The steam fixation applied for direct dye and reactive dye printing at 100c for 10 minutes and gor flue fixation foracid dye and disperses dye and disperses dye printing at 150c for 5 minutes. The printed quality was good at rubbing fastness true color appearance. Theresidual paste was removed completely in washing off process.
Phosphonic Acid Functionalization of Hyperbranched Polyamidoamine Grafted Ultrafine Silica to Prepare the Flame Retardant for Cotton Fabric
Grafting of hyperbranched polyamidoamine (PAMAM) dendrimer onto ultrafine silica followed by the introduction of phosphonic acid groups onto branch ends was carried out. First an initiating site was incorporated into silica surface by reacting the silica silanol group with 3-aminopropyltriethoxysilane producing amino-functionalized silica. The free amine group content was controlled by varying ratios of methanol to water in the hydrolysis step of sol-gel reaction. Then grafting of PAMAM was performed by repetitive reactions between Michael addition of silica amino groups to methyl acrylate and amidation of the resulting terminal methyl ester groups with ethylenediamine. Amino group content in each generation was determined. This was found to be significantly lower than theoretical value due to unavoidable side reactions. After the G3.0 hyperbranched PAMAM grafted onto silica was synthesized phosphonic acids functionalization of the terminal amino groups by the Mannich type reaction was carried out. The phosphorylated hyperbranched PAMAM grafted silica was achieved and its application on cotton fabric to produce phosphonated cellulose was studied.