The low molecular weight polyacrylate sodium (PAA Na) detergent builder was synthesized with K 2S 2O 8 as initiator in a neutral aqueous medium. The influences of reaction conditions on the viscosity average molec...The low molecular weight polyacrylate sodium (PAA Na) detergent builder was synthesized with K 2S 2O 8 as initiator in a neutral aqueous medium. The influences of reaction conditions on the viscosity average molecular weight were studied. The critical value of synthetic PAA Na inhibiting the precipitation of CaCO 3 was determined and compared with that of other common builders. It is confirmed from SEM graphs that PAA Na can make CaCO 3 crystal defective. Washing tests show synthetic PAA Na can partially replace sodium tripolyphosphate (STPP) and is a potential polymeric detergent builder in low phosphate powder detergents.展开更多
An modified laminar crystal sodium silicate （A1-SKS-6） was synthesized by spray drying and high temperature crystallization using sodium silicate as silicon source, A1 atom as inorganic source and hexadecyltrimethy ...An modified laminar crystal sodium silicate （A1-SKS-6） was synthesized by spray drying and high temperature crystallization using sodium silicate as silicon source, A1 atom as inorganic source and hexadecyltrimethy ammonium bromide （CTMAB） as the structure template. The hydrothermal stability of product was at least 1 h. The synthesized material was characterized by XRD and SEM. The results indicated that shape and intensity of XRD diffraction peak at 20 took changes, but raw material 8 phase crystal form kept unchanged, and assured high Ca^2＋ and Mg^2＋ binding capacity of the products. The Ca^2＋ and Mg^2＋ binding capacity of product is up to 380 mg Ca/g and 410mg Mg/g respectively. It was found that the hole of product became smaller and appeared rod structure based on SEM. The hydrothermal stability was increased due to the pillaring of AI atom.展开更多
文摘The low molecular weight polyacrylate sodium (PAA Na) detergent builder was synthesized with K 2S 2O 8 as initiator in a neutral aqueous medium. The influences of reaction conditions on the viscosity average molecular weight were studied. The critical value of synthetic PAA Na inhibiting the precipitation of CaCO 3 was determined and compared with that of other common builders. It is confirmed from SEM graphs that PAA Na can make CaCO 3 crystal defective. Washing tests show synthetic PAA Na can partially replace sodium tripolyphosphate (STPP) and is a potential polymeric detergent builder in low phosphate powder detergents.
文摘An modified laminar crystal sodium silicate （A1-SKS-6） was synthesized by spray drying and high temperature crystallization using sodium silicate as silicon source, A1 atom as inorganic source and hexadecyltrimethy ammonium bromide （CTMAB） as the structure template. The hydrothermal stability of product was at least 1 h. The synthesized material was characterized by XRD and SEM. The results indicated that shape and intensity of XRD diffraction peak at 20 took changes, but raw material 8 phase crystal form kept unchanged, and assured high Ca^2＋ and Mg^2＋ binding capacity of the products. The Ca^2＋ and Mg^2＋ binding capacity of product is up to 380 mg Ca/g and 410mg Mg/g respectively. It was found that the hole of product became smaller and appeared rod structure based on SEM. The hydrothermal stability was increased due to the pillaring of AI atom.
