Effect of Spray Drying Parameters on Polyvinyl Chloride Resin Particle Size Distribution and Plastisol Rheology

1981 ◽  
pp. 209-224 ◽  
Author(s):  
D. J. HOFFMANN ◽  
P. M. SAFFRON
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Spray Drying ◽  
Polyvinyl Chloride ◽  
Resin Particle

Process Factors Using Centrifugal Spray Drying to Prepare Bauxite Microspheres

2011 ◽  
Vol 399-401 ◽  
pp. 828-833
Author(s):  
Xiao Su Cheng ◽  
Meng Qi Peng ◽  
Yu Fa Zhong
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Spray Drying ◽  
Average Diameter ◽  
Optimal Operation ◽  
Solid Content ◽  
Diameter Distribution ◽  
Drying Process ◽  
Process Factors

The centrifugal spray drying process of bauxite slurry was studied to investigate the influence of slurry solid content on the particle size distribution and the sphericity of the microspheres, and so was operation technology on average diameter and the sphericity of the microspheres. The optimal operation parameters are obtained to prepare high spherical microspheres bauxite with the diameter distribution of 100 μm and whose particle size distribution is narrow: the slurry solid content is 70 wt%, the dry air temperature is 250 °C, the rotation rate of spray head is 6000 rpm and the feed flow rate is 1 L/h in the experiments.

scholarly journals The effects of rheological properties of wall materials on morphology and particle size distribution of microcapsule

2010 ◽  
Vol 28 (No. 5) ◽  
pp. 433-439 ◽  
Author(s):  
Y. Xie ◽  
A. Wang ◽  
Q. Lu ◽  
M. Hui
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Rheological Properties ◽  
Size Distribution ◽  
Spray Drying ◽  
Average Diameter ◽  
Core Material ◽  
Viscous Modulus ◽  
Wall Materials ◽  
Paste Viscosity

The effects of rheological properties of the wall materials on the morphology and particle size distribution of microcapsules prepared by spray-drying were evaluated. Gelatin-sucrose (Gel-Suc), gelatin-peach-gum-sucrose (Gel-PG-Suc), and HI-CAP 100 were used as wall materials with vitamin A as a model core material. Scanning electron microscopy (SEM) showed that microcapsules produced with Gel-Suc exhibited cracks while Gel-PG-Suc produced a smooth surface with few pores, and HI-CAP100 a rounded surface containing characteristic concavities. The volume average diameter (D<sub>4,3</sub>) showed significant variations from 73.9 &plusmn; 1.02 &micro;m and 68.7 &plusmn; 0.85 &micro;m to 29.9 &plusmn; 0.94 &micro;m (P &lt; 0.05). Rheometry indicated that the wall paste viscosity was inversely proportional to the shear rate. Viscosity ranking was Gel-Suc &gt; Gel-PG-Suc &gt; HI-CAP 100. Gel-Suc showed the highest elastic modulus (G') and viscous modulus (G'' values), followed by Gel-PG-Suc and HI-CAP 100. Gel-Suc was associated with moderate quantities of broken microcapsules while HI-CAP 100 generated numerous microcapsules with characteristic dents generated during spray-drying.

scholarly journals Sintesis Nanoenkapsulasi Ekstrak Kulit Durian dengan Metode Spray Drying dan Aplikasinya sebagai Biopestisida: Review

2018 ◽  
Vol 2 (2) ◽  
pp. 89
Author(s):  
Nina Hartini ◽  
Syarifatur Richana ◽  
Bayu Triwibowo ◽  
Nur Qudus ◽  
Ratna Dewi Kusumaningtyas
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Spray Drying ◽  
Encapsulation Efficiency ◽  
Pesticide Poisoning ◽  
Drying Method ◽  
Encapsulation Process ◽  
Synthetic Pesticides ◽  
Encapsulation Methods

Indonesia sebagai negara agraris, sebagian penduduk Indonesia bermata pencaharian di bidang pertanian. Pada umumnya, masyarakat menggunakan pestisida untuk membasmi hama. Karena tingginya penggunaan pestisida maka WHO (2016) menyatakan kasus keracunan pestisida mencapai 193.000 jiwa selama tahun 2012. Untuk mengatasi permasalahan tersebut, biopestisida menjadi bahan alternatif pengganti pestisida karena lebih aman dan ramah lingkungan. Salah satu bahan alam yang berpotensi sebagai biopestisida adalah kulit durian. Rata-rata produksi durian setiap tahunnya 780.032,8 ton/tahun. Limbah kulit durian memiliki berat 60-75% dengan kandungan senyawa metabolit sekunder relatif tinggi belum termanfaatkan secara maksimal. Senyawa tersebut dimanfaatkan sebagai antioksidan dan antimikroba dalam proses pembasmi hama. Biopestisida yang dikembangkan dengan metode sokletasi menghasilkan ekstrak berbentuk cair. Namun, hasil tersebut kurang efektif dan mudah teroksidasi sehingga menurunkan keefektifitasan kadar bahan aktif. Mengatasi masalah tersebut maka perlu dikembangkan inovasi dengan proses enkapsulasi. Artikel ini me-review pengembangan metode enkapsulasi. Metode yang dapat digunakan untuk enkapsulasi biopestisida yaitu ekstrusi, spray chilling dan spray drying. Metode spray drying lebih berpotensi mengenkapsulasi biopestisida dari kulit durian karena memiliki efisiensi enkapsulan lebih tinggi dan hampir mendekati 100%. Distribusi ukuran partikel yang dihasilkan tergolong nanoenkapsulan.Indonesia as an agrarian country, most of Indonesia's people work in agriculture. In general, people use pesticides to eradicate pests. Due to the high use of pesticides, WHO (2016) stated the case of pesticide poisoning reach 193,000 in 2012. To solve the problem, Biopesticide as an alternative of synthetic pesticides because it’s more safe and environmentally friendly. One of the natural ingredients that potentially as biopesticide is durian peel. The average durian production per year is 780,032.8 tons/year. Durian peels waste weighs 60-75% with a relatively high contains  of secondary metabolite  not yet fully utilized. It’s  used as antioxidants and antimicrobials in pesticides. Biopesticide is developed by socletation method. However, the results are less effective because it’s easily oxidized, so reduce the flavonoid efectiveness. To solve this problem, to be developed innovation with encapsulation process. This article reviews the development of encapsulation methods. Methods that can be used for biopesticide encapsulation are extrusion, spray chilling and spray drying. Spray drying method is more likely to encapsulate biopesticides because it has higher encapsulation efficiency and is close to 100%. The resulting particle size distribution is classified as nanocapsul.

scholarly journals Tailoring hydroxyapatite microspheres by spray-drying for powder bed fusion feedstock

2021 ◽  
Author(s):  
Pedro Navarrete-Segado ◽  
Christine Frances ◽  
David Grossin ◽  
Mallorie Tourbin
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Spray Drying ◽  
Laser Processing ◽  
Operating Conditions ◽  
Air Pressure ◽  
Final Particle ◽  
Powder Bed ◽  
Powder Feedstock

The present work deals with a study on the physical characteristics of hydroxyapatite microspheres produced by spray-drying process through different operating conditions. Obtained hydroxyapatite microspheres will be used as powder feedstock in powder bed selective laser processing additive manufacturing technologies where the flowability and the particle size distribution of the powder feedstock is of special importance. Spray air pressure and solid content of the slurries were the most influent parameters to control the final particle size distribution, while higher air pressure and temperatures gave the higher process recovery rate. The use of polyvinyl alcohol as organic binder increased the granules strength. The produced hydroxyapatite microspheres were found to fulfil the powder bed selective laser processing feedstock requirements, keeping the physico-chemical properties of the material. These promising results confirm the use of a spray dryer as an efficient method for the production of hydroxyapatite microspheres for powder bed selective laser processing.

Effects of Particle Size Distribution on Corrosion Rate of Carbon Steel in Soil

2020 ◽  
Vol 69 (4) ◽  
pp. 102-106
Author(s):  
Shota Ohki ◽  
Shingo Mineta ◽  
Mamoru Mizunuma ◽  
Soichi Oka ◽  
Masayuki Tsuda
Keyword(s):  
Particle Size ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Particle Size Distribution ◽  
Size Distribution

DENSE SPRAY CORRECTIONS FOR DIFFRACTION-BASED PARTICLE SIZE DISTRIBUTION MEASUREMENTS

1995 ◽  
Vol 5 (1) ◽  
pp. 75-87 ◽  
Author(s):  
Christine M. Woodall ◽  
James E. Peters ◽  
Richard O. Buckius
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution
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