scholarly journals Preparation and Investigation of Intelligent Polymeric Nanocapsule for Enhanced Oil Recovery

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1093 ◽  
Author(s):  
Fang Shi ◽  
Jingchun Wu ◽  
Bo Zhao
Keyword(s):  
Particle Size ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Colloidal Particles ◽  
Critical Concentration ◽  
Average Particle Size ◽  
Average Particle ◽  
Assembly Method ◽  
Recovery Capacity ◽  
Wide Range

Micro-/nanomotors colloidal particles have attracted increasing interest as composite surfactants, owing to the combined advantages of both Janus solid surfactants and micro-/nanomotors. Here we put micro-/nanomotors colloidal particles into hollow polymeric micro-encapsulates. An intelligent polymeric nanocapsule was prepared for enhanced oil recovery by the self-assembly method. The particle size range of the polymeric capsule can be controlled between 20 to 1000 nm by adjusting the cross-linking thickness of the capsule’s outer membrane. The average particle size of polymeric capsules prepared in the study was 300 nm. The structure and properties of the Intelligent polymeric nanocapsule was characterized by a wide range of technics such as Fourier transform infrared spectroscopy, scanning electron microscopy by laser diffraction, fluorescence microscopy, pendant drop tensiometer, laser particle size instrument, and interface tension analyzer. It was found that the intelligent polymeric nanocapsule exhibited significant interfacial activity at the oil-water interface. When the Janus particles’ concentration reached saturation concentration, the adsorption of the amphiphilic nanoparticles at the interface was saturated, and the equilibrium surface tension dropped to around 31 mN/m. When the particles’ concentration reached a critical concentration of aggregation, the Gibbs stability criterion was fulfilled. The intelligent polymeric nanocapsule system has a better plugging and enhanced oil recovery capacity. The results obtained provide fundamental insights into the understanding of the assembly behavior and emulsifying properties of the intelligent polymeric nanocapsule, and further demonstrate the future potential of the intelligent polymeric nanocapsule used as colloid surfactants for enhanced oil recovery applications.

Abstract 399: High Throughput Comprehensive Volumetric Approach for Determination of Particle Number and Composition of Lipoproteins in Normolipidemic and Dyslipidemic Populations

2017 ◽  
Vol 37 (suppl_1) ◽  
Author(s):  
Zsuzsanna Kuklenyik ◽  
John R Barr ◽  
James L Pirkle ◽  
Keyword(s):  
Particle Size ◽  
High Throughput ◽  
Size Range ◽  
Average Particle Size ◽  
Protein Composition ◽  
Average Particle ◽  
Surface Lipid ◽  
Molar Ratios ◽  
Ldl Particles ◽  
Wide Range

Lipoproteins (Lps) are large molecular assembles formed by lipid and apolipoprotein constituents. The physical metric of Lps as metabolically functional entities is particle concentration in serum or plasma (Lp-P). However, the metabolic functions of Lp particles is determined by their lipid/protein composition and structure. To be able to determine both Lp composition and Lp-P, a volumetric approach is required, as demonstrated by Segrest et al and other groups. In this work the volumetric approach was implemented but with applicability to population studies. The workflow included size based separation of Lps by asymmetric flow field-flow fractionation while collecting fractions with 1-1.5 nm increments in the range of 7-15 nm (HDL), 20-30 nm (LDL) and >30 nm Lps (40 fractions in total from 0.1 mL serum aliquots). The average particle size in each fraction was measured by dynamic light scattering. Three high throughput, parallel LC-MS/MS based methods were developed to quantify main non-polar lipids (FC, CE and TG), phospholipids (PC, SM, PE, PI and LPC), and apolipoproteins (apos A-I, A-II, A-IV, B, C-I, C-II, C-III and E). Quantification of particle size and all major Lp components was achieved with 4-15% CVs. Overall accuracy of the methods was demonstrated by ApoB-100/LDL-P molar ratios of 0.7-1.3 (vs. 1 expected) in the 22-26 nm maximum LDL size range. In the 7.5-13 nm size range, ApoA-I/HDL-P was 0.7-3.5 and ApoA-II/HDL-P of 0.5-2.5. Using the calculated Lp-P values, average individual analyte/Lp-P molar ratios were calculated in each fraction. The workflow was applied to 120 patient samples with wide range of Total-C and Total-TG levels. Multivariate response surface modeling was used to show significant correlations among individual lipid/Lp-P and apolipoprotein/Lp-P molar ratios. For example, with correction for particle size, the correlations of apoC-III/Lp-P and FC/Lp-P with SM/Lp-P, PC/Lp-P, TG/Lp-P and CE/Lp-P were determined, showing the effect of surface lipid and core lipid composition on apoC-III and FC binding to HDL and LDL particles, while also revealing significant cross effects among Lp components. By using <0.1 mL serum or plasma, the workflow is applicable to archived samples collected in large cohort studies.

scholarly journals Polysubstituted High-Entropy [LaNd](Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 Perovskites: Correlation of the Electrical and Magnetic Properties

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1014
Author(s):  
Vladimir E. Zhivulin ◽  
Evgeniy A. Trofimov ◽  
Svetlana A. Gudkova ◽  
Igor Yu. Pashkeev ◽  
Alexander Yu. Punda ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Chemical Composition ◽  
Average Particle Size ◽  
Maximum Size ◽  
Average Particle ◽  
Ferromagnetic Cluster ◽  
High Entropy ◽  
Wide Range ◽  
Field Cooling

La-, Nd- and La/Nd-based polysubstituted high-entropy oxides (HEOs) were produced by solid-state reactions. Composition of the B-site was fixed for all samples (Cr0.2Mn0.2Fe0.2Co0.2Ni0.2) with varying of A-site cation (La, Nd and La0.5Nd0.5). Nominal chemical composition of the HEOs correlates well with initial calculated stoichiometry. All produced samples are single phase with perovskite-like structure. Average particle size is critically dependent on chemical composition. Minimal average particle size (~400 nm) was observed for the La-based sample and maximal average particle size (5.8 μm) was observed for the Nd-based sample. The values of the configurational entropy of mixing for each sample were calculated. Electrical properties were investigated in the wide range of temperatures (150–450 K) and frequencies (10−1–107 Hz). Results are discussed in terms of the variable range hopping and the small polaron hopping mechanisms. Magnetic properties were analyzed from the temperature and field dependences of the specific magnetization. The frustrated state of the spin subsystem was observed, and it can be a result of the increasing entropy state. From the Zero-Field-Cooling and Field-Cooling regimes (ZFC-FC) curves, we determine the <S> average and Smax maximum size of a ferromagnetic nanocluster in a paramagnetic matrix. The <S> average size of a ferromagnetic cluster is ~100 nm (La-CMFCNO) and ~60 nm (LN-CMFCNO). The Smax maximum size is ~210 nm (La-CMFCNO) and ~205 nm (LN-CMFCNO). For Nd-CMFCNO, spin glass state (ferromagnetic cluster lower than 30 nm) was observed due to f-d exchange at low temperatures.

scholarly journals Silver and Copper nano-colloid generation via Pulsed Laser Ablation in Liquid: Recirculation nanoparticle production mode

2021 ◽  
Author(s):  
Sithara Sreenilayam Pavithran ◽  
Ronan McCann ◽  
Éanna McCarthy ◽  
Brian Freeland ◽  
Karsten Fleischer ◽  
...  
Keyword(s):  
Particle Size ◽  
Laser Ablation ◽  
Average Particle Size ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Average Particle ◽  
Laser Ablation In Liquid ◽  
Wide Range ◽  
Ligand Free ◽  
Unique Chemical

Metal nanoparticles have unique chemical, physical, electrical, and optical properties that make them attractive for a wide range of applications in sensing, anti-fouling surfaces, medicine, and conductive inks. Pulsed Laser Ablation in Liquid (PLAL) is a green method of nanoparticle colloid production, capable of producing ligand-free nanoparticles in solution without the need for hazardous, environmentally unfriendly chemicals. Control of the process parameters can give control over the resulting colloid properties such as particle size distribution. In this work, silver (Ag) nanoparticles (NPs) with average particle size from 2.04 to 19.3 nm and copper (Cu) NPs with average particle size from 40 to 85.9 nm were produced by PLAL) technique.

Synthesis of Crosslinkable Core-Shell Emulsion and Rheology of the Core-Shell/Amine Crosslinking Process

2009 ◽  
Vol 79-82 ◽  
pp. 2203-2206
Author(s):  
Jia Lu ◽  
Allan J. Easteal ◽  
Debes Bhattacharyya ◽  
Clive J. Bolt ◽  
Neil R. Edmonds
Keyword(s):  
Particle Size ◽  
Average Particle Size ◽  
Complex Viscosity ◽  
Shell Morphology ◽  
Core Shell ◽  
Average Particle ◽  
Crosslinking Reaction ◽  
Shear Moduli ◽  
The Core ◽  
Wide Range

Starve feed and semi-continuous seed emulsion polymerization were used to control the morphology of core shell latex particles with a vinyl acetate (VAc)/vinyl ester of versatic acid 10(VeoVa10) copolymer core surrounded by a poly(glycidyl methacrylate) (PGMA) shell. Pure core and core-shell structures were confirmed by TEM. The results suggest that core-shell morphology of the two stage emulsion was favoured by higher concentration of emulsifier in the seed latex: the particle size distribution of core-shell latex was broader than that of the core latex, and the average particle size of core-shell latex was larger than that of the core latex. The core-shell structure was not produced using seed emulsion with emulsifier concentration at or below the critical micelle concentration. The core shell emulsion containing epoxy functional group with added ethylene diamine showed an abrupt increase in dynamic shear moduli, G' and G'' and complex viscosity η* (several orders of magnitude) at about 35oC, during temperature ramps, over a wide range of angular frequencies. The time ramps showed that the crosslinking reaction did not occur at 15oC for the core-shell emulsion/amine system. The time for gel formation decreased with increase in temperature.

scholarly journals Effect of the Sintering Temperature on the Compressive Strengths of Reticulated Porous Zirconia

2021 ◽  
Vol 11 (12) ◽  
pp. 5672
Author(s):  
Chae-Young Lee ◽  
Sujin Lee ◽  
Jang-Hoon Ha ◽  
Jongman Lee ◽  
In-Hyuck Song ◽  
...  
Keyword(s):  
Particle Size ◽  
Compressive Strength ◽  
Sintering Temperature ◽  
Porous Ceramic ◽  
Average Particle Size ◽  
Porous Ceramics ◽  
Average Particle ◽  
High Porosity ◽  
Wide Range ◽  
Porous Zirconia

Porous ceramics have separation/collection (open pore) and heat-shielding/sound-absorbing (closed pore) characteristics not found in conventional dense ceramics, increasing their industrial importance along with dense ceramics. Reticulated porous ceramics, a type of porous ceramic material, are characterized by a three-dimensional network structure having high porosity and permeability. Although there have been numerous studies of porous zirconia, which is already widely used, there are insufficient reports on reticulated porous zirconia, and it is still challenging to improve the compressive strength of reticulated porous ceramics thus far, especially considering that too few studies have been published on this topic. Therefore, we prepared reticulated porous zirconia specimens using the replica template method. In this study, the compressive strength outcomes of reticulated porous zirconia were analyzed by controlling the PPI value (25, 45, 60, and 80 PPI) of the sacrificial polymer template, the average zirconia particle size (as-received, coarse, intermediate, and fine), and the sintering temperature (1400, 1500, and 1600 °C). Consequently, we confirm that it is possible to prepare reticulated porous zirconia with a wide range of strengths (0.16~1.26 MPa) as needed with an average particle size and while properly controlling the sintering temperature.

Investigation on the preparation of nanoparticles by inverse micro-emulsion polymerization for enhanced oil recovery

2019 ◽  
Vol 9 (9) ◽  
pp. 1062-1066
Author(s):  
Dong Zhang ◽  
Runnan Zhou ◽  
Xinren Fang ◽  
Yue Qiu
Keyword(s):  
Particle Size ◽  
Emulsion Polymerization ◽  
Oil Recovery ◽  
Average Particle Size ◽  
Low Permeability ◽  
Average Particle ◽  
Profile Control ◽  
Micro Emulsion ◽  
Pass Through ◽  
Enhance Oil Recovery

Polyacrylamide nanoparticles attracted increasing interest as profile control agents in oilfield development owing to the characteristics of deformation and continuous expansion in core pore. In this article, the structure and morphology of polyacrylamide nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). And the fluorescence microscopy and core displacement equipment were used to evaluate the properties of the expansion and plugging properties. Results showed that the nanoparticles prepared by inverse emulsion polymerization can be able to pass through the pores in the rocks due to the uniform particle size which is less than 500 nm. When the nanoparticles were in contact with water for 72 hours, the average particle size increased to 12.2 μm. The water-swelled nanoparticles can effectively block the high-permeability layer and improve the oil recovery in the low-permeability layer. The results obtained in this paper reveal the mechanism of elastic deformation and expansion characteristics of polyacrylamide nanoparticles, and further prove the great potential of nanoparticles to enhance oil recovery in the development of low permeability oilfields.

Synthesis and Characterization of Titanium Dioxide Nanoparticles for Application in Enhanced Oil Recovery

2019 ◽  
Vol 391 ◽  
pp. 74-81 ◽  
Author(s):  
Hasnah Mohd Zaid ◽  
Hanan Fakhruldi ◽  
Foo Yoong Yow ◽  
Norzafirah Razali ◽  
Yaleeni Kanan Dasan
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Titanium Dioxide ◽  
Surface Area ◽  
Calcination Temperature ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Titanium Dioxide Nanoparticles ◽  
Average Particle ◽  
Bet Analysis

In this study, titanium dioxide nanoparticles were synthesized for possible application in enhanced oil recovery. Sol-gel method was employed with titanium (IV) isopropoxide as the precursor. The prepared materials were characterized using Powder X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), High-Resolution Transmission electron microscopy (HRTEM) and Brunauer–Emmet–Teller (BET) techniques. Reaction parameter such as calcination temperature was varied during the preparation to obtain the uniform TiO2 nanoparticles with the smallest particle size and high surface area. The results of study revealed that 400 °C is the optimum calcination temperature in preparing TiO2 nanoparticles producing the smallest crystallite and particle sizes. XRD results indicated that the nanoparticles have formed anatase phase at 400 °C and achieved low crystallite size of 7.27 nm with the smallest average particle size of 19.53 nm through FESEM and HRTEM observations. BET analysis had achieved the highest surface area 103.64 m2/g.

The Effects of Synthesis Conditions on PUF Microcapsule Morphology

2012 ◽  
Vol 217-219 ◽  
pp. 661-665
Author(s):  
Ning Ning Hu ◽  
Hao Han Huang ◽  
Hong Zhi Cui
Keyword(s):  
Particle Size ◽  
In Situ Polymerization ◽  
Average Particle Size ◽  
Wall Material ◽  
Average Particle ◽  
Self Healing ◽  
Test Results ◽  
Synthesis Conditions ◽  
Wide Range

In this paper, self-healing PUF microcapsules were prepared by in situ polymerization. The test results show that: 1) the ratio of core/wall material can had a significant effect on the average particle size of microcapsules. The ratio happens to be 1.0 to 1.0, best coating, relatively dense surface can be achieved. When the ratio reaches 1.4 to 1.0, the microcapsules have worst coating, particle size, distribution of wide range, and comparatively rough surface. When the ratio is 0.8 to 1.0 or 1.2 to 1.0, preferable coating, uniform particle size and its distribution, as well as smooth and dense surface can be obtained. 2) The faster the stirring speed, the smaller the particle size of microcapsule will be. And the size becomes bigger and varied with the stirring speed decreasing.

scholarly journals Supercritical Carbon Dioxide Extraction of Hevea Brasiliensis Seeds: Influence of Particle Size on to Oil Seed Recovery and its Kinetic

2021 ◽  
Vol 17 (3) ◽  
pp. 253-261
Author(s):  
Lee Nian Yian ◽  
Nicky Rahmana Putra ◽  
Zuhaili Idham ◽  
Nor Faadila Mohd Idrus ◽  
Ahmad Hazim Abdul Aziz ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Particle Size ◽  
Supercritical Carbon Dioxide ◽  
Oil Recovery ◽  
Average Particle Size ◽  
Morphological Characterization ◽  
Extraction Rate ◽  
Average Particle ◽  
Diffusivity Coefficient ◽  
Supercritical Carbon

The aim of this study is to investigate the effect of particle sizes on yield, diffusivity, mass transfer and morphological characterization on extraction rate of rubber seed oil recovery by supercritical carbon dioxide (ScCO2). Pressure 30 MPa, temperature 60 oC and average particle size 500 µm gives the maximum oil recovery (34.71%), diffusivity coefficient (5.13 E-12 m2/s) and extraction rate (0.6 mg/sec). The morphological characterization of extracted rubber seeds was done on the basis of scanning electron microscopy which was parallel with the results of the effect of particle size. The results obtained from gas chromatography-mass spectrometry showed that the rubber seeds oil contained significant essential fatty acids and certain chemical constituents which are very valuable.

TOXICITY UNDER A SINGLE INTRAGASTRIC ADMINISTRATION OF THE ACTIVE CLATHRATE COMPLEX OF β-CYCLODEXTRIN WITH 3-(2-PHENYLETHYL)-2-THIOXO-1,3- THIAZOLIDIN-4-ONE

2021 ◽  
pp. 59-62
Author(s):  
K. T. Erimbetov ◽  
R. A. Zemlyanoy ◽  
E. K. Bondarenko ◽  
A. Ya. Goncharova
Keyword(s):  
Particle Size ◽  
Average Particle Size ◽  
Intragastric Administration ◽  
Average Particle ◽  
Pharmacological Properties ◽  
Wide Range ◽  
First Time

The clathrate complex of 3-(2-phenylethyl)-2-thioxo-1,3-thiazolidin-4-one with β-cyclodextrin in the form of a nanopowder with an average particle size of 40.5 nm, with a wide range of pharmacological properties, was developed for the first time. It belongs to class VI of relatively harmless drugs according to Hodge and to class 5 in accordance with GOST 32644-2014.

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