Solvent-casting process

Growth Into the Secondary Particle. Figure 2 shows a schematic representation of the mechanism of pore forming in the solvent casting process. Depending on the Initial polymer concentration,... 

The slow rate of transition from stage (h) to stage (d) in Figure 2 is an indispensable condition in the solvent-cast process of ultrafiltration membrane technology. Stage (d) is a kind of micro-phase separation, which is apparently metastahle. The transitions (h) to (c) and (c) to (d) are governed hy the mobility and the surface free energy of the particle. 

Fig. 5.12 Schematic of the surface-ordering process in a diblock copolymer. The top diagram shows the dibiock copolymer in a phase mixed state. This is not accessible for PS/PMMA co-polymers via solvent-casting processes. The center diagram corresponds to a microphase-separated morphology where the periodic lamellar microdomains are randomly oriented in the specimen. After annealing for 24 h at 170 °C, the copolymer exhibits a lamellae morphology oriented parallel to the surface as shown in the bottom picture. Reprinted with permission from ref. [96]...

Solvent casting process is the simplest method for laboratory-scale preparation of PLA/nanocellulose biocomposites. Organic solvents for PLA dissolution such as N,N-dimethylacetamide (DMAc), 26,27,29,32,43,50,51,53,60-63... 

Thin films of SMPU/CB/Ni nanocomposites were prepared via solvent cast process using DMF as a common solvent. The concentration of CB was varied from 4 to 10 vol.%, while the concentration of Ni particles was kept constant (0.5 vol%). The Ni particles aligned one after another in one line, got organized instantly upon applying a weak magnetic field in solution before drying the samples. After solidification. 

CO-3-hydroxy valerate) (PHBV) and cellulose by extrusion blending, using a co-rotating twin screw extruder with a temperature profile ranging from 160 to 145 °C. PHBV pellets were dried, dry mixed with a cellulose nanowhisker powder and extruded. The extrudate was cooled in a water bath and the final pellets were dried. This material did not have the same mechanical properties and the same cellulose dispersion as the analogous composite prepared with solvent casting process. It was necessary to add a compatibilizer to improve the dispersion. 

Several researchers have focused their attention on the preparation of polylactide (PLA) nanocomposites. PLA is one type of hydrophobic aliphatic polyester, and as such, it is not water soluble. Therefore, solvent casting processes are carried out in nonpolar solvents such as chloroform or dichloromethane. In order to achieve intercalated stiuctures, the use of modified clays is mandatory (McLauchlin and Thomas 2009 Jaffar A 1-Mu I la 2011 Rhim et al. 2009 Chang and An 2002 Krikorian and Pochan 2003). Best results, i.e., partial or complete exfoliation, are... 

Du, Fischer, and Winey (2003) and Zeng et al. (2010) used both methods in attempts to produce the PMMA/carbon nanotube (CNT) nanocomposites. They found ASP resulted in better CNTs dispersion. Unlike the solvent casting process where nanoparticles may agglomerate during solvent evaporation, in ASP, the rapid precipitation of PMMA-CNTs very effectively lock down the well-dispersed structure. 

Processing method Inflation process Solvent casting process... 

In general, due to the strong immiscibility of macromolecular blends, polymer mixtures demix during the rapid solvent-casting process thus leading to different surface structures [14,15,76,77]. The final surface structure depends on the spin-casting solvent [34], the blend [29,37,48,41,78-83] and polymer chemical composition [80], the polymer-polymer [6,14,30,35,80] and polymer-substrate [34,35,37,82,84,85] interactions in the formation of the domain structures [15,86], the thickness of the film [34,87-90], (e) tanperature [91] and (f) the evolution of the spin-cast structures toward... 

For making of a FET device, the NWs S5mthesized by any of the above methods have to be immobilized within a prefabricated source-drain electrode because of the incompatibility of the CP NWs with the chemicals and conditions used for lithography process. The easiest method of immobilization of NWs is solvent-casting process where a drop of NWs containing solution is dispensed over the... 

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