Enhanced Droplet Nucleation in Styrene Miniemulsion Polymerization. 3. Effect of Shear in Miniemulsions That Use Cetyl Alcohol as the Cosurfactant

1999 ◽  
Vol 32 (13) ◽  
pp. 4225-4231 ◽  
Author(s):  
P. J. Blythe ◽  
A. Klein ◽  
E. D. Sudol ◽  
M. S. El-Aasser
Keyword(s):  
Miniemulsion Polymerization ◽  
Cetyl Alcohol ◽  
Droplet Nucleation

Enhanced Droplet Nucleation in Styrene Miniemulsion Polymerization. 1. Effect of Polymer Type in Sodium Lauryl Sulfate/Cetyl Alcohol Miniemulsions

1999 ◽  
Vol 32 (21) ◽  
pp. 6944-6951 ◽  
Author(s):  
P. J. Blythe ◽  
B. R. Morrison ◽  
K. A. Mathauer ◽  
E. D. Sudol ◽  
M. S. El-Aasser
Keyword(s):  
Sodium Lauryl Sulfate ◽  
Miniemulsion Polymerization ◽  
Cetyl Alcohol ◽  
Lauryl Sulfate ◽  
Droplet Nucleation ◽  
Polymer Type

(Cryo)-TEM Assessment of Droplet Nucleation Efficiency in Hybrid Acrylic/CeO2Semibatch Miniemulsion Polymerization

2014 ◽  
Vol 47 (23) ◽  
pp. 8404-8410 ◽  
Author(s):  
M. Aguirre ◽  
M. Barrado ◽  
M. Paulis ◽  
J. R. Leiza
Keyword(s):  
Miniemulsion Polymerization ◽  
Droplet Nucleation

scholarly journals Nucleation of Ga droplets self-assembly on GaAs(111)A substrates

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Artur Tuktamyshev ◽  
Alexey Fedorov ◽  
Sergio Bietti ◽  
Stefano Vichi ◽  
Riccardo Tambone ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Size Distribution ◽  
Self Assembly ◽  
Cluster Size ◽  
Droplet Size Distribution ◽  
Local Environment ◽  
The Self ◽  
Critical Cluster ◽  
Droplet Nucleation ◽  
High Degree

AbstractWe investigated the nucleation of Ga droplets on singular GaAs(111)A substrates in the view of their use as the seeds for the self-assembled droplet epitaxial quantum dots. A small critical cluster size of 1–2 atoms characterizes the droplet nucleation. Low values of the Hopkins-Skellam index (as low as 0.35) demonstrate a high degree of a spatial order of the droplet ensemble. Around $$350\,^{\circ }\hbox {C}$$ 350 ∘ C the droplet size distribution becomes bimodal. We attribute this observation to the interplay between the local environment and the limitation to the adatom surface diffusion introduced by the Ehrlich–Schwöbel barrier at the terrace edges.

scholarly journals OPTIMASI KONSENTRASI SETIL ALKOHOL SEBAGAI AGEN PENGENTAL PADA FORMULA KRIM EKSTRAK RIMPANG KUNYIT (Curcuma domestica)

2018 ◽  
pp. 40
Author(s):  
I Gusti Ayu Nadia Prasta Unique
Keyword(s):  
Wound Healing ◽  
Cetyl Alcohol ◽  
Organoleptic Evaluation ◽  
Power Test ◽  
Brownish Yellow ◽  
Turmeric Extract ◽  
Yellow Color ◽  
Oil In Water ◽  
Dispersing Ability ◽  
Good Homogeneity

ABSTRAK Penelitian ini betujuan untuk memformulasikan krim dari ekstrak rimpang kunyit (Curcuma domestica Val.) untuk memperoleh sediaan yang stabil sebagai krim obat luka dengan variasi konsentrasi setil alkohol sebagai agen pengental. Dalam penelitian ini krim diformulasikan dengan variasi konsentrasi setil alkohol F I (4%), F II (7%), dan F III (10%). Evaluasi fisik sediaan krim yang dilakukan meliputi evaluasi organoleptis, homogenitas, daya lekat, daya sebar, pH, tipe krim, dan viskositas. Hasil uji menunjukkan ketiga formula menghasilkan krim berwarna warna kuning jingga kecoklatan, bau khas kunyit, dan sediaan dengan tekstur krim semisolid, memiliki homogenitas yang baik, kemampuan menyebar yang baik, pH sediaan yaitu 5,86; 5,66; 4,68 dan tipe emulsi M/A (Minyak dalam Air). Hasil uji viskositas menunjukkan FII dan FIII memiliki viskositas yang sesuai dengan persyaratan. Uji daya lekat menunjukkan bahwa ketiga formulasi krim belum memenuhi persyaratan daya lekat sediaan topikal yang baik. ABSTRACT This study aims to formulation creams from turmeric extract (Curcuma domestica Val.) to obtain stable preparations as a wound healing cream in the variations concentration of cetyl alcohol as a stiffening agent. In this study, the cream was formulated with variations concentration of cetyl alcohol F 1 (4%), F II (7%), and F III (10%). The formulation were evaluated basen on several parameter, that are organoleptic evaluation, homogeneity, adhesion, dispersion, pH, cream type, and viscosity. The evaluation showed that the three formulas produced cream with a brownish-yellow color, a distinctive smell of turmeric, and preparations with a semisolid cream texture, had good homogeneity, good dispersing ability, pH of the preparation namely 5.86; 5.66; 4,68 and type M / A emulsions (Oil in Water). The results of the viscosity test showed that FII and FIII has viscosity that is suitable with the requirements. The sticky power test showed that all cream formulations does not suitable with the requirements of good topical preparations.

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