The octaanion, [OSiO1.5]88− (OA) is a low cost, discrete nano silica particle that can be made directly from high surface area, amorphous silica reacted with Me4NOH in water alcohol mixtures. It would be ideal if Me4NOH could be formed in situ from, for example, Me4NCl and NaOH, as long known in the literature. This process would reduce costs and enable recycling of Me4NCl produced in the funct...

The purpose of this study was to evaluate the dynamic viscoelastic properties of experimental silicone soft lining materials, Silastic MDX 4-4210 reinforced with silica fillers. Storage modulus (E'), loss modulus (E") and damping factor (tan delta) were determined using a dynamic mechanical analyzer under a deformation strain level of 0.27% at test frequency and a temperature range of 1 Hz and ...

Thermochemical energy storage (TCES) in salt hydrates is a promising method for seasonal thermal storage. However, suffer from agglomeration and deliquescence drastically degrading their performance after just few cycles. Here, modified dry water-style preparation methods are developed leakage-free microencapsulation of CaCl2 with hydrophobic fumed silica nanoparticles. Using novel phase invers...

A brief review of the stabilisation of emulsions of two immiscible oils is given. We then describe the use of fumed silica particles coated with either hydrocarbon or fluorocarbon groups in acting as sole stabilisers of emulsions of various vegetable oils with linear silicone oils (PDMS) of different viscosity. Transitional phase inversion of emulsions, containing equal volumes of the two oils,...

Cement hydration within particle bed concrete 3D printing processes can be benefited by storing water in the otherwise dry aggregate bulk material. Additional also has advantage of acting as a source passive cooling. However, even small amounts liquid lead to detrimental effects on properties, such flowability. For that reason, this study proposes implementing (DW) order store large material no...

The formation of reactive oxygen species resulting from the interaction of silica dust particles with red blood cell membranes was investigated; particularly, the effect of surface hydroxyl (silanol) group concentration on the rate of formation of such reactive oxygen species was investigated. The rate of formation was measured indirectly through the effect of catalase, a hemoprotein peroxidase...

A "hydrophobic layer in silica" structure was designed to integrate a compact quantum dot (QD) layer with high quantum yield into scalable silica hosts containing desired functionality. This was based on metal affinity driven assembly of hydrophobic QDs with versatile silica substrates and homogeneous encapsulation of organosilica/silica layers.

UNLABELLED The remarkable physicochemical properties of particles in the nanometer range have been proven to address many challenges in the field of science. However, the possible toxic effects of these particles have raised some concerns. The aim of this article is to evaluate the effects of poly(lactide-co-glycolide) (PLGA) nanoparticles in vitro and in vivo compared to industrial nanoparticl...