Low-temperature processed carbon-based perovskite solar cells have received great attention due to low-cost, high stability, and simple preparation processes that can be employed in large-scale manufacturing. Carbon paste is deposited by techniques such as doctor blading or screen printing. However, solvents from this damage the underlying layers resulting poor performance of cells. Furthermore...

The micronization of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) from organic solutions using supercritical antisolvent (SAS) technique has been successfully achieved. SAS experiments were carried out at different operational conditions and microspheres with mean diameters ranging from 3 to 9 microm were obtained. The effect of CO(2) and liquid flow, temperature and pressure on particle...

Supercritical antisolvent micronization (SAS) is a versatile technique that allows the obtainment of different morphologies and dimensions of precipitates, but only in some cases nanoparticles were produced. This work is focused on the selection of the SAS operating conditions to obtain this morphology. A series of experiments on several compounds and different solvents at 40 °C and selected pr...

Anti-solvent crystallization can be used as an alternative to cooling or evaporation for the separation and purification of solid product in the pharmaceutical industry. Addition of antisolvent reduces the solubility of a solute in solution thereby facilitating the generation of supersaturation, the driving force for nucleation and growth. Some of the problems associated with anti-solvent cryst...

This thesis discusses particle production by supercritical antisolvent processing (SAS) techniques by looking the fundamentals and applications of the method with some case studies. The final aim of this work is however to consider the SAS particle production process feasibility. In the process studied the solid is dissolved in a conventional solvent and the solution is sprayed continuously thr...

Allopurinol is a relatively water-insoluble drug and, consequently, its efficacy was frequently limited by the dissolution or solubility phenomena. The purpose of this study to improve solid-state properties and behavior allopurinol via supercritical antisolvent (SAS) process using CO2 as an antisolvent. effects operating parameters: temperature (35–55 °C), pressure (80–100 bar), solution conce...

Inverse vulcanised sulfur polymer nanoparticles prepared by antisolvent precipitation–demonstrated as mercury ion absorbent in solution, showing high selectivity and capacity, membrane filters.

In an era where sustainability is becoming the main driving force for research and development, supercritical fluids-based techniques are presented as a very efficient alternative technology to conventional extraction, purification, recrystallization processes. Supercritical antisolvent (SAS) precipitation novel technique that can replace liquid techniques. Additionally, through optimization of...

The crystal morphology of glucosamine hydrochloride (GAH) during antisolvent crystallization was investigated in this work. Particles different shapes, such as plate-like crystals, leaflike clusters, fan-like dendrites, flower-like aggregates, and spherulites, were produced by tuning the type antisolvents operating conditions. hierarchical structures GAH crystals tended to be formed a water + i...

Deep eutectic solvents (DESs) have always been attractive to scientists due to their wide range of applications, a great interest in diverse fields including nanotechnology due to their unique properties as new green solvents. It used large-scale for chemical and electrochemical synthesis nanomaterial. DESs have had also active role in improving the size and morphology of nanomaterial during sy...