INVESTIGATION ON FORMATION AND HARDENING PROCESS OF MICROCAPSULES UNDER EXCITATION

2012 ◽  
Vol 19 ◽  
pp. 262-269
Author(s):  
TIEN-CHU LIN
Keyword(s):  
Aqueous Solution ◽  
Calcium Chloride ◽  
Empirical Formula ◽  
High Speed ◽  
Diffusion Processes ◽  
Membrane Thickness ◽  
Formation Processes ◽  
Membrane Material ◽  
Hardening Process ◽  
Encapsulation Process

This research investigates the micro-encapsulation process with a pressure-type micro-atomizer. Alginate and CaCl 2 aqueous solution are used as the membrane material and hardening agent, respectively. The high speed images were taken to investigate the formation processes of the microcapsules. Results show that the geometric shape of the microcapsules was sensitive to the droplet flying distant and the concentration of alginate aqueous, however, insensitive to the concentration of CaCl 2 aqueous. Results also show that the membrane thickness of the microcapsules was controlled by the diffusion processes of calcium chloride. An empirical formula was derived to describe the rate change of the membrane thickness in the hardening processes.

PERFORMANCE OF A MICRO ATOMIZER UNDER SINGLE-FLUID AND TWIN-FLUID MICRO-ENCAPSULATION PROCESS

2012 ◽  
Vol 19 ◽  
pp. 219-226 ◽  
Author(s):  
TIEN-CHU LIN
Keyword(s):  
Aqueous Solution ◽  
High Speed ◽  
Formation Processes ◽  
Membrane Material ◽  
Atomization Process ◽  
Operational Conditions ◽  
At Resonance ◽  
Instability Modes ◽  
Encapsulation Process ◽  
Helical Mode

This research investigates the performance of an assembly micro-atomizer under single-fluid and twin-fluid operational conditions of micro-encapsulation process. Alginate and CaCl2 aqueous solution are used as the membrane material and hardening agent, respectively. The high speed images were taken to investigate the formation processes of the microcapsules. Results showed that the formation of the microcapsules depends on the instability modes of the liquid column including asymmetry mode, helical mode, sinusoidal mode and spray developing mode as Reynolds number was increased from 221 to 2210. Excitation at resonance frequency of 2.18 kHz of this system resulted in the production of uniform-sized microcapsules. Moreover, SMD equal to 20 μm can be achieved in low GLR under twin-fluid atomization process. It is not easy to achieve by commercial apparatus.

Impact of feed water pH and membrane material on nanofiltration of perfluorohexanoic acid in aqueous solution

Chemosphere ◽  
2017 ◽  
Vol 183 ◽  
pp. 599-604 ◽  
Author(s):  
Chenghui Zeng ◽  
Shuhei Tanaka ◽  
Yuji Suzuki ◽  
Shigeo Fujii
Keyword(s):  
Aqueous Solution ◽  
Feed Water ◽  
Membrane Material ◽  
Water Ph

Studying on Preperation and Emulsifying Properties of Silk Protein Calcium Salt Made from Waste Silk

2011 ◽  
Vol 197-198 ◽  
pp. 60-64 ◽  
Author(s):  
Jun Sheng Li ◽  
Hai Tao Cheng
Keyword(s):  
Aqueous Solution ◽  
Calcium Chloride ◽  
Salt Solution ◽  
Chloride Solution ◽  
Calcium Salt ◽  
Calcium Chloride Solution ◽  
Silk Protein ◽  
Emulsifying Properties ◽  
Emulsification Capacity ◽  
New Protein

One key step for silk protein further uses is to let them be dissolved in aqueous solution. However, the silk protein is usually not soluble in aqueous solution. Silk protein dissolved in calcium chloride solution is one of the few effective ways. Silk fibroin was well dissolved in 15-20min. in boiling calcium chloride solution [50% (w/v)] with the ratio of 15g dry waste silk per100mL calcium chloride solution. After dialysis, silk protein calcium salt unexpectedly showed excellent emulsification capacity and stability. Only 0.8-1.2% of silk protein calcium salt solution (50mL) could let 50mL soybean salad oil be mixed and emulsified well. Silk protein calcium salt may be used as a new protein-based surfactant.

CO2 Fixation Using MEA and CaCl2 Aqueous Solutions

2014 ◽  
Vol 541-542 ◽  
pp. 130-133
Author(s):  
Feng Liu ◽  
Zhi Xin Li ◽  
Dong Fu
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Calcium Chloride ◽  
Ionic Form ◽  
Temperature And Pressure

The saturated CO2 loadings in monoethanolamine (MEA) aqueous solutions at normal temperature and pressure were measured. The calcium chloride (CaCl2) aqueous solution was added into the CO2 loaded MEA aqueous solution to converse the ionic form of CO2 (CO32-) to CaCO3 precipitation. The influence of the addition of CaCl2 on the CO2 fixation was illustrated.

Self-assembly and gel formation processes in an aqueous solution of L-cysteine and silver nitrate

2012 ◽  
Vol 53 (5) ◽  
pp. 988-1005 ◽  
Author(s):  
P. V. Komarov ◽  
I. V. Mikhailov ◽  
V. G. Alekseev ◽  
S. D. Khizhnyak ◽  
P. M. Pakhomov
Keyword(s):  
Aqueous Solution ◽  
Silver Nitrate ◽  
Self Assembly ◽  
Formation Processes ◽  
Gel Formation

Membrane material in bovine skim-milk from udder quarters infused with endotoxin and pathogenic organisms

1975 ◽  
Vol 42 (3) ◽  
pp. 401-417 ◽  
Author(s):  
M. Anderson ◽  
B. E. Brooker ◽  
A. T. Andrews ◽  
E. Alichanidis
Keyword(s):  
Milk Fat ◽  
High Speed ◽  
Skim Milk ◽  
Protein Composition ◽  
Membrane Material ◽  
Cell Debris ◽  
Relative Contribution ◽  
Milk Fat Globule ◽  
Fat Globule ◽  
And Control

SummaryThe effects of infusing endotoxin and a pathogen into different quarters of the udder of the same cow on the appearance and composition of milk membrane material were studied. Milk membrane was prepared by high-speed centrifugation of skim-milk. In samples from the control quarters only, a very thin layer covering the casein pellet was observed, whereas after the infusions it appeared as an opaque diffuse fluffy layer. The fluffy layer persisted for a maximum of 3 d after endotoxin infusion. A similar layer appeared 14 d after infusion of the pathogen and persisted, in spite of antibiotic treatment, throughout the experiment. From comparisons of (a) milk acid phosphatase activities between infused and control quarters, (b) the protein composition of milk membrane, and (c) morphological observations on the distribution of membrane material in milk, it was concluded that milk membrane originates from leucocytes, cell debris from the mammary gland, and the surface of the milk-fat globule membrane. The relative contribution made by these sources to milk membrane from healthy and infected udders is discussed.

Evaluation of the Impact Formulae for Rigid Projectile Striking on Concrete Target

2011 ◽  
Vol 368-373 ◽  
pp. 894-900 ◽  
Author(s):  
Hao Wu ◽  
Qin Fang
Keyword(s):  
Penetration Depth ◽  
Empirical Formula ◽  
High Strength Concrete ◽  
High Speed ◽  
High Strength ◽  
Local Damage ◽  
High Speed Impact ◽  
Rigid Projectile ◽  
Semi Empirical ◽  
The Impact

Based on the large amounts of field impact tests with different projectile nosed shapes, the abilities of the existing classical empirical and semi-empirical impact formulae in predicting the local damage of normal and high strength concrete targets (NSCT & HSCT) under the strike of rigid projectile were evaluated. It finds that, firstly, for the penetration depth, the Forrestal and Chen & Li semi-empirical formulae, BRL and Whiffen empirical formulae are advised for the NSCT under the impact of ogive nosed projectile; and Chen & Li semi-empirical formula and ACE empirical formulae are advised for the NSCT under the impact of special nosed projectile; the dimensionless penetration depth of NSCT increases linearly with the non-dimensional impact factor. Secondly, for the penetration depth, Chen & Li semi-empirical formula is advised for the HSCT under the mid-to-high speed impact, and the existing formulae are not applicable while the speed of the projectile was relatively low. Thirdly, for the perforation mode of the target, the BRL and Chang empirical formulae are advised for the NSCT, and the Chen semi-empirical formula, ACE and BRL empirical formulae are advised for the HSCT.

High-speed gel filtration of proteins in sodium dodecyl sulphate aqueous solution on TSK-GEL SW type

1980 ◽  
Vol 193 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Yoshio Kato ◽  
Katsuo Komiya ◽  
Hiroo Sasaki ◽  
Tsutomu Hashimoto
Keyword(s):  
Aqueous Solution ◽  
Sodium Dodecyl Sulphate ◽  
High Speed ◽  
Sodium Dodecyl ◽  
Gel Filtration
Sign in / Sign up

Export Citation Format

Share Document