Hermetically Coated Nanosilver: No Ag+ Ion Leaching

2012 ◽  
Vol 1386 ◽  
Author(s):  
G. Sotiriou ◽  
S. Gass ◽  
S.E. Pratsinis
Keyword(s):  
Quantitative Evaluation ◽  
Flow Rate ◽  
Parametric Study ◽  
Silver Ions ◽  
Promising Material ◽  
Composite Particles ◽  
Coating Process ◽  
Ion Release ◽  
Dry Coating ◽  
Direct Cell

ABSTRACTDry-coated nanosilver is a promising material for bio-applications. Its inert and non-porous nanothin SiO2 coating preserves the plasmonic properties of the nanosilver and cures its toxicity by (1) preventing direct cell to silver contact and (2) blocking the release of toxic silver ions. However, fully hermetic coatings have, to date, not been produced. During the coating process, a certain number of core particles are either coated only partially, or escape the coating process entirely. Here, a systematic parametric study was undertaken in order to optimize an aerosol reactor for the synthesis and dry-coating of nanosilver. The reactor was optimized with respect to coating injection height, jet number, mixing flow rate. By synthesizing xAg/SiO2 composite particles, small silver sizes (9-11 nm) with relatively high Ag ion release were obtained. This enabled the quantitative evaluation of the coatings by Ag ion release measurements.

Preparation of Conductive Composite Particles by Impact Coating Process

2007 ◽  
Vol 336-338 ◽  
pp. 2044-2046 ◽  
Author(s):  
Xiang Yang Hao ◽  
Guo Sheng Gai ◽  
Yu Fen Yang ◽  
Yi He Zhang ◽  
Ce Wen Nan
Keyword(s):  
Polymer Composites ◽  
Composite System ◽  
Conductive Polymer ◽  
Composite Particles ◽  
Coating Process ◽  
Molding Process ◽  
Dry Coating ◽  
Particle Composite ◽  
Conductive Polymer Composites ◽  
Polyethylene Particles

PCS (particle composite system) is a kind of dry coating equipment. The PCS process involves encapsulating UHMWPE (ultra-high molecular polyethylene) particles with a layer of SCB (super conductive carbon black) or ACB (acetylene black), and subsequently compacting these CB-encapsulated UHMWPE powders by compression molding to manufacture conductive polymer composites respectively. Morphologies of these composite particles were investigated by SEM. By SEM, we can see the conductive networks of CB in polymer composites. Coating-molding process with PCS can be used to form network structure in ceramics and metal as well.

scholarly journals Production of composite particles using an innovative continuous dry coating process derived from extrusion

2017 ◽  
Vol 28 (11) ◽  
pp. 2875-2885 ◽  
Author(s):  
Fanny Cavaillès ◽  
Romain Sescousse ◽  
Alain Chamayou ◽  
Laurence Galet
Keyword(s):  
Composite Particles ◽  
Coating Process ◽  
Dry Coating

scholarly journals Fractal diffusion of silver ions in hollow cylinders with unsmooth inner surface

2019 ◽  
Vol 14 ◽  
pp. 155892501989564
Author(s):  
Ling Lin ◽  
Shao-Wen Yao
Keyword(s):  
Fractal Dimension ◽  
Hollow Fiber ◽  
Theoretical Basis ◽  
Silver Ions ◽  
Present Theory ◽  
Ion Release ◽  
Practical Applications ◽  
Fractal Derivative ◽  
Inner Surface ◽  
Hollow Cylinders

This article studies the ion release from an unsmooth inner surface of a hollow fiber. A fractal diffusion model is established using the fractal derivative, and the effect of the fractal dimension on the ion release is elucidated. The present theory provides a theoretical basis for the optimization of a hollow fiber contained silver ions for practical applications.

scholarly journals Thermo-Mechanical Dry Coating as Dry Coating Process is for Pharmaceuticals

2021 ◽  
Vol 11 (6) ◽  
pp. 176-187
Author(s):  
Mahammed Athar Alli Saikh ◽  
Prithwiraj Mohapatra
Keyword(s):  
Fine Particle ◽  
Coating Process ◽  
High Shear ◽  
Particle Engineering ◽  
Dry Coating ◽  
Ultra Fine Particle ◽  
Working Principle ◽  
Substrate Particle ◽  
Pharmaceutical Processes ◽  
Magnetically Assisted

The manuscript aims to provide glimpse on updated information relating thermo-mechanical dry coating processes (TMDCP) suiting in modifying surface attributes of fine and ultra-fine particle (FiUlFiP). FiUlFiPs are the integral component of pharmaceutical processes. They exhibit complex and queer properties, are conferred mostly from their surface attributes colligated with their higher surface area. Particle engineering technocrats extensively working for modifying surface & surface attributes of FiUlFiPs. These efforts are to find their worthy applications & new functionalities. Among available diverse particle engineering technologies/ process, TMDCP, a dry coating process (DCP), advocated being worthy and efficient. The TMDCP finds multidisciplinary applications, mostly in drug development & drug delivery. Said DCP involves fixing and/or attaching coating material (CoM) as particles herein synonym guest particle (GP) onto core/substrate particle (CSP) herein synonym host particle (HP). Attaching/ fixing the GPs onto HPs, in TMDCP, involve their mechanical and/or thermal interactions. Scientific literatures are evidencing diverse techniques and/or process, basing on discussed interactions. Amongst them novel techniques/ processes are Hybridization, Magnetically assisted impaction coating process (MAICP), Mechanofusion, Theta-composer, and high shear compaction. In this area diverse devices/ equipments are prevailing in market. Important are Hybridizer, Magnetically assisted impaction coater (MAIC), Theta-composer, Mechanofusion, Quadro Comil®, Cyclomix®, and many others. Attempt of this article is to discuss and present their method of working, working principle, applicability, limitations, and benefits. Contained information might be beneficial for professionals of pharmaceutical and allied field. Keywords: dry coating, equipment, particles, processes, thermo-mechanical.

Parametric study and flow rate optimization of all-vanadium redox flow batteries

2018 ◽  
Vol 228 ◽  
pp. 891-901 ◽  
Author(s):  
Dong Kyu Kim ◽  
Sang Jun Yoon ◽  
Jaeho Lee ◽  
Sangwon Kim
Keyword(s):  
Flow Rate ◽  
Parametric Study ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Rate Optimization ◽  
Vanadium Redox

scholarly journals Silver ion release from Ag/PET hollow fibers: Mathematical model and its application to food packing

2020 ◽  
Vol 15 ◽  
pp. 155892502093544
Author(s):  
Ling Lin ◽  
Shao-Wen Yao ◽  
Huigai Li
Keyword(s):  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Bright Light ◽  
Silver Ions ◽  
Release Time ◽  
Fiber Membrane ◽  
Ion Release ◽  
Release Process ◽  
Predator Prey ◽  
Predator Prey Model

A food packing system requires an antimicrobial environment with high air permeability to guarantee absolutely both food safety and long and reliable durability. A hollow fiber membrane containing silver ions is the best candidate for this purpose. However, a safe and controllable release process has become a pressing issue in the practical application. Here, we use the predator–prey model to predict the antimicrobial activity of silver ions released from a hollow fiber, and Staphylococcus aureus was applied to the antibacterial experiment. Both theoretical and experimental results show that there are an optimal concentration of the silver ions and an optimal release time. This article sheds a bright light on the design of a new kind of food packing systems using the hollow fiber membrane.

Parametric study on the distribution of flow rate and heat sink utilization in cooling channels of advanced aero-engines

Energy ◽  
2017 ◽  
Vol 138 ◽  
pp. 1056-1068 ◽  
Author(s):  
Yuguang Jiang ◽  
Yaxing Xu ◽  
Silong Zhang ◽  
Khaled Chetehouna ◽  
Nicolas Gascoin ◽  
...  
Keyword(s):  
Flow Rate ◽  
Heat Sink ◽  
Parametric Study ◽  
Cooling Channels ◽  
Aero Engines ◽  
Distribution Of Flow
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