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The pillared derivatives from δ-layered sodium disilicate were investigated by intercalation of bisoctyl dimethyl ammonium chloride and dioctadecyl dimethyl ammonium chloride. The influence of various parameters such as water content, pH of the mixture, and time were examined. The resultant samples were characterized by X-ray powder diffraction, Fourier transform infrared, and thermal gravimetric observation. The experimental results showed that δ-layered sodium disilicate was first transformed to kanemite (NaHSi2O4(OH)2 · 2H2O), and subsequently kanemite was pillared with bisoctyl dimethyl ammonium chloride or dioctadecyl dimethyl ammonium chloride. The tribological properties of typical samples then were investigated by point contact test. The results show that the pillared derivatives have good load-carrying capacity and friction-reducing property.

This paper investigated the interaction of α-Na2Si2O5 and β-μNa2Si2O5 with surfactants sodium dodecylbenzene sulfonate (LAS), sodium lauryl sulfate (K12), alkyl polyglycol ether-9 (AEO-9) and α-olefin hydrocarbon sulfonate (AOS) under condition approximating the detergent spray drying process. The interaction samples were characterized by XRD and TG. The experimental results showed that α-Na2Si2O5 and β-Na2Si2O5 sustained their phases after interacted with surfactants. The relative crystallinity of α-Na2Si2O5 had little change after interacting with surfactants exception of AOS because it had better adsorbable effect on the surface of α-Na2Si2O5 than LAS, K12 and AEO-9. At the same conditions, the amount of H2O and surfactants were both important factors on the relative crystallinity of β-μNa2Si2O5. It also was proved that the temperature had little influence on the relative crystallinity of both α-Na2Si2O5 and β-Na2Si2O5. Compared with Al-δ-Na2Si2O5, α-Na2Si2O5 and β-μNa2Si2O5 were more stable than Al-δ-Na2Si2O5 after interacted with surfactants.