scholarly journals Enhanced oil removal from a real polymer production plant by cellulose nanocrystals-serine incorporated polyethersulfone ultrafiltration membrane

2022 ◽  
Author(s):  
Azar Asadi ◽  
Foad Gholami ◽  
Ali Akbar Zinatizadeh
Keyword(s):  
Cellulose Nanocrystals ◽  
Ultrafiltration Membrane ◽  
Production Plant ◽  
Oil Removal

scholarly journals Enhanced oil removal from a real polymer production plant by cellulose nanocrystals - Serine incorporated polyethersulfone ultrafiltration membrane

2021 ◽  
Author(s):  
Azar Asadi ◽  
Foad Gholami ◽  
Ali Akbar Zinatizadeh
Keyword(s):  
Cellulose Nanocrystals ◽  
Water Flux ◽  
Cross Flow ◽  
Ultrafiltration Membrane ◽  
Production Plant ◽  
Oil Removal ◽  
Potential Threat ◽  
Water Contact ◽  
Negative Surface ◽  
Term Performance

Abstract As discharging oily wastewater from industries to the environment is a potential threat for the aquatic ecosystem, in this research oil removal from a real case of Kermanshah polymer production plant wastewater was investigated. The focus of this study was on improving the oil rejection performance of polyethersulfone (PES) ultrafiltration membrane due to adding cellulose nanocrystals (CNC) and modified CNC with Serine amino acid (CNC-Ser) in PES mix matrix. From the results, the membranes embedded with CNC-Ser showed better performance in terms of water flux, flux recovery ratio and oil rejection (higher than 97%) compared to the modified membranes with CNC. The lowest water contact angle (41.370), the smoother surface and higher negative surface potential (-24 mv) was achieved for the optimum loading of CNC-Ser. Besides, long-term performance of the membranes with optimum loading of CNC and CNC-Ser were compared in both dead-end and cross-flow set-ups.

scholarly journals Enhanced oil removal from a real polymer production plant by cellulose nanocrystals - Serine incorporated polyethersulfone ultrafiltration membrane

2021 ◽  
Author(s):  
Azar Asadi ◽  
Foad Gholami ◽  
Ali Akbar Zinatizadeh
Keyword(s):  
Cellulose Nanocrystals ◽  
Water Flux ◽  
Cross Flow ◽  
Ultrafiltration Membrane ◽  
Production Plant ◽  
Oil Removal ◽  
Potential Threat ◽  
Water Contact ◽  
Negative Surface ◽  
Term Performance

Abstract As discharging oily wastewater from industries to the environment is a potential threat for the aquatic ecosystem, in this research oil removal from a real case of Kermanshah polymer production plant wastewater was investigated. The focus of this study was on improving the oil rejection performance of polyethersulfone (PES) ultrafiltration membrane due to adding cellulose nanocrystals (CNC) and modified CNC with Serine amino acid (CNC-Ser) in PES mix matrix. From the results, the membranes embedded with CNC-Ser showed better performance in terms of water flux, flux recovery ratio and oil rejection (higher than 97%) compared to the modified membranes with CNC. The lowest water contact angle (41.370), the smoother surface and higher negative surface potential (-24 mv) was achieved for the optimum loading of CNC-Ser. Besides, long-term performance of the membranes with optimum loading of CNC and CNC-Ser were compared in both dead-end and cross-flow set-ups.

Use of digital microscopy in process control during the manufacture of rubber-modified thermoplastics

1996 ◽  
Vol 54 ◽  
pp. 616-617
Author(s):  
M. T. Dineen
Keyword(s):  
Ccd Camera ◽  
Operating Costs ◽  
Hard Copy ◽  
Production Plant ◽  
Digital Microscopy ◽  
Nih Image ◽  
Transmission Electron ◽  
Conventional Film ◽  
Product Loss ◽  
Image Collection

The production of rubber modified thermoplastics can exceed rates of 30,000 pounds per hour. If a production plant needs to equilibrate or has an upset, that means operating costs and lost revenue. Results of transmission electron microscopy (TEM) can be used for process adjustments to minimize product loss. Conventional TEM, however, is not a rapid turnaround technique. The TEM process was examined, and it was determined that 50% of the time it took to complete a polymer sample was related to film processing, even when using automated equipment. By replacing the conventional film portion of the process with a commercially available system to digitally acquire the TEM image, a production plant can have the same TEM image in the control room within 1.5 hours of sampling.A Hitachi H-600 TEM Operated at 100 kV with a tungsten filament was retrofitted with a SEMICAPS™ image collection and processing workstation and a KODAK MEGAPLUS™ charged coupled device (CCD) camera (Fig. 1). Media Cybernetics Image-Pro Plus software was included, and connections to a Phaser II SDX printer and the network were made. Network printers and other PC and Mac software (e.g. NIH Image) were available. By using digital acquisition and processing, the time it takes to produce a hard copy of a digital image is greatly reduced compared to the time it takes to process film.

Preparation of La-doped TiO$lt;inf$gt;2$lt;/inf$gt; Ultrafiltration Membrane by Templating of Block Copolymer

2015 ◽  
Vol 30 (2) ◽  
pp. 171 ◽  
Author(s):  
CHEN Tao-Tao ◽  
LI Dan ◽  
JING Wen-Heng ◽  
FAN Yi-Qun ◽  
XING Wei-Hong
Keyword(s):  
Block Copolymer ◽  
Ultrafiltration Membrane ◽  
La Doped

Silicone oil removal options after cataract phacoemulsification

2020 ◽  
pp. 98-99
Author(s):  
A.M. Danilov ◽  
◽  
A.G. Grinev ◽  
M.B. Sviridova ◽  
◽  
...  
Keyword(s):  
Silicone Oil ◽  
Oil Removal ◽  
Silicone Oil Removal

Актуальность. Тампонада витреальной полости силиконовым маслом (СМ) или наличие остатков СМ при авитрии являются показаниями к их удалению, которое может быть выполнено различными методиками, нередко после факоэмульсификации катаракты. Цель. Изучить результаты удаления СМ через задний капсулорексис (ЗК) различными методами. 1. Изучить возможность удаления остатков СМ через задний капсулорексис при авитрии. 2. Провести апробацию удаления СМ через ЗК методом эффузии. 3. Провести апробацию удаления СМ через ЗК методом аспирации. Материал и методы. Под наблюдением находилось 18 пациентов, проходивших лечение в СОКБ №1. Результаты. Операции выполнены без осложнений в ближайшем и отдаленном послеоперационном периоде с улучшением зрительных функций. Выводы. 1. Изучены результаты удаления СМ через задний капсулорексис. 2. Удаление остатков СМ через ЗК при авитрии после факоэмульсификации позволяет повысить степень удовлетворенности пациентов результатами хирургического лечения. 3. Проведена апробация удаления СМ через ЗК методом эффузии, что позволяет качественнее удалять СМ, в том числе эмульгированные фрагменты. 4. Проведена апробация удаления СМ через ЗК методом аспирации, что сокращает время операции, позволяет в большем объеме удалять остатки эмульгированного СМ.

Tuning the Magnetic Alignment of Cellulose Nanocrystals from Perpendicular to Parallel Using Lepidocrocite Nanoparticles

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Sugam Kumar ◽  
Yulia Trushkina ◽  
Gergely Nagy ◽  
Christina Schütz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Cellulose Nanocrystals ◽  
Small Angle Neutron Scattering ◽  
Lower Amount ◽  
Magnetic Alignment ◽  
Polarized Optical Microscopy ◽  
Parallel Orientation ◽  
Weak Magnetic Fields

The magnetic alignment of cellulose nanocrystals (CNC) and lepidocrocite nanorods (LpN), pristine and in hybrid suspensions has been investigated using contrast-matched small-angle neutron scattering (SANS) under in situ magnetic fields (0 – 6.8 T) and polarized optical microscopy. The pristine CNC (diamagnetic) and pristine LpN (paramagnetic) align perpendicular and parallel to the direction of field, respectively. The alignment of both the nanoparticles in their hybrid suspensions depends on the relative amount of the two components (CNC and LpN) and strength of the applied magnetic field. In the presence of 10 wt% LpN and fields < 1.0 T, the CNC align parallel to the field. In the hybrid containing lower amount of LpN (1 wt%), the ordering of CNC is partially frustrated in all range of magnetic field. At the same time, the LpN shows both perpendicular and parallel orientation, in the presence of CNC. This study highlights that the natural perpendicular ordering of CNC can be switched to parallel by weak magnetic fields and the incorporation of paramagnetic nanoparticle as LpN, as well it gives a method to influence the orientation of LpN.<br>

Applications of Cellulose Nanocrystals: A Review

2018 ◽  
Author(s):  
Shaoqu Xie ◽  
◽  
Xiao Zhang ◽  
Michael P. Walcott ◽  
Hongfei Lin ◽  
...  
Keyword(s):  
Cellulose Nanocrystals
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