![](images/graphics/blank.gif)
Pore size
-
This work aimed to introduce nanosized SiO2 into the CS matrix to produce three-dimensional (3D) scaffolds by solvent casting combined with salt leaching using NaCl as a porogen agent. The amount of the porogen to polymer was varied to produce 3D CS/SiO2 scaffolds with suitable pore sizes and porosity.
7p
dianmotminh02
03-05-2024
2
1
Download
-
Ebook "Studies on “perfect” hyperbranched chains free in solution and confined in a cylindrical pore" also reveals how the chain structure of amphiphilic hyperbranched block and graft copolymers affect their solution properties, including the establishments of several classic scaling laws that relate the chain size and the intrinsic viscosity to the overall molar mass and the subchain length, respectively. This work has led to numerous publications in high-impact peer-reviewed journals.
134p
tudohanhtau1006
29-03-2024
3
1
Download
-
In this study, two sulfur-based carriers (C1 and C2) which have different mass ratios with the same core components as elemental sulfur and calcium carbonate but varying adhesive volumes were prepared to evaluate the sulfur-driven denitrification performance.
7p
vijeff
30-11-2023
5
2
Download
-
Metaleorganic frameworks (MOFs) are a versatile category of porous coordination polymers which can be differentiated from other porous nanomaterials due to their fascinating properties such as adaptable surface chemistry, tuneable functionalities, and exceedingly large surface area and uniform/controllable pore size.
20p
viberbers
09-08-2023
8
3
Download
-
Diagenesis in the Permo-Triassic New Red Sandstone, Isle of Arran is characterized by early cementation of hematite, clay, and calcite minerals, followed by burial compaction, quartz, feldspar, and pyrite cementation. Cataclasis post-dated the quartz and feldspar cementation and reduced the grain and pore aperture size in deformed samples.
12p
vilucius
03-03-2023
3
3
Download
-
This study aims to characterize and investigate steel slag for the removal of its persistent organic pollutants (measured as COD) from pulp mill wastewater. Steel slag and its NaOH-modified states were characterized by Fourier-transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) surface area analysis, Barrett-Joyner-Halenda (BJH) pore size, and volume analysis.
16p
vidudley
20-02-2023
5
2
Download
-
Positron annihilation is of great interest for applications in evaluating material structures in range from a few angstroms to hundreds of nanometers. Here, we report on a new model for calculating the free volume size in porous materials from the experimental ortho-Positronium (o-Ps) lifetimes reported and updated over than past four decades by the combination of the quantum and semi-classical physics models.
8p
vicedric
08-02-2023
3
3
Download
-
In this study, we develop a model for permeability for porous media using an upscaling technique. For this, we conceptualize a porous medium as a bundle of capillary tubes with the similarly skewed pore size distribution. The proposed model is related to microstructural properties such as maximum radius, porosity, tortuosity and a characteristic constant of porous media.
7p
vimalfoy
08-02-2023
3
2
Download
-
Herein, environmentally benign chitin nanofiber (ChNF) membranes were fabricated by regulating suspension behavior. The introduction of zeolitic imidazole frameworks (ZIF-8) into the composite membranes led to the domain formation of ChNF derived by coordinative interaction, resulting in pore size-tunable membranes.
9p
viginny
30-12-2022
14
2
Download
-
A combined experimental and theoretical study was performed to understand how the pore size of packing materials with pores 60–300 A˚ in size affects the separation of 5–50-mer oligonucleotides. For this purpose, we developed a model in which the solutes were described as thin rods to estimate the accessible surface area of the solute as a function of the pore size and solute size.
10p
viginny
23-12-2022
6
3
Download
-
In clay-rich sedimentary rocks, the pore network is considered to play a key role in controlling transport properties. The pore size distribution (PSD) of clay-rich rocks, the geometrical features of the pore network, and the clay content are parameters governing the diffusion process through clay formations.
13p
vironald
15-12-2022
7
2
Download
-
Comprehensive ex-situ and in-situ investigations of thermal curing processes in spin-on ultra-low-k thin films conducted by positron annihilation spectroscopy and Fourier transform infrared spectroscopies are presented. Positron annihilation lifetime spectroscopy of ex-situ cured samples reveals an onset of the curing process at about 200 ◦C, which advances with increasing curing temperature.
10p
vironald
15-12-2022
4
2
Download
-
The recent pharmaceutical interest toward confinement effects on the physical state, solubility and release of drugs has paved the way to new material designs for drug delivery. Deeper understanding on how the pore size or the additional functionalities of the nanocarriers can influence the bioavailability of the cargo is nonetheless needed to explore further the potential of nanocarriers in this area.
8p
vironald
15-12-2022
11
2
Download
-
Anthropogenic greenhouse gas emission poses as serious threat to our environment and it is therefore of utmost importance that efficient systems are developed to mitigate these issues. SF6, in particular, has attracted more attention in recent years due to its global warming potential which severely exceeds that of CO2.
9p
vironald
15-12-2022
6
2
Download
-
Lecture Drilling engineering: Kick tolerance. By the end of this lecture you should be able to define kick tolerance; describe gas behaviour in various scenarios; be familiar with kick tolerance calculation as the main concept of the casing design process; list kick tolerance volumes versus hole sizes; calculate the optimum casing setting depths when lithological column, predicted pore pressures and fracture gradients;...
22p
hanthienngao
15-04-2022
10
2
Download
-
The sponge pores decorated with Au nanoparticles could effectively capture and concentrate microplastics in the pores from aquaes sample. Interestingly, the adjustable size of the sponge could allow the distance between the “hot spots” on the substrate surface to be controlled, hence controlling the SERS signal intensity.
8p
thebadguys
15-01-2022
5
0
Download
-
CeO2–ZrO2-composed NiO and Co3O4 catalysts were prepared by 3 different methods. Both CO methanation and selective CO methanation were carried out. All catalysts were prepared by (1) co-precipitation, (2) surfactantassisted co-precipitation, and (3) surfactant-assisted co-precipitation with ultrasound mixing methods. Catalysts were characterized by using N2 physisorption, XRD, SEM, TEM, and TPR-H2 techniques. The highest surface area value, uniform pore size distribution, and pores having small diameters were observed for the catalysts prepared by using the surfactant and ultrasound.
13p
langthannam
29-12-2021
10
0
Download
-
Celecoxib is a poorly water-soluble nonsteroidal anti-inflammatory drug. Here we report four ordered mesoporous silica MCM-41 supports with different particle size, pore volume, and surface properties to investigate their loading capacity with celecoxib and their release abilities. Spherical MCM-41 mesoporous supports less than 50 nm in diameter were prepared and to compare the effect of the template removal process on morphology of samples, acid extraction and calcination methods were used.
17p
langthannam
29-12-2021
9
0
Download
-
NiO–Al2O3–ZrO2 and Co3O4–Al2O3–ZrO2 catalysts were prepared by three different co-precipitation methods, namely co-precipitation, surfactant-assisted co-precipitation, and surfactant-assisted co-precipitation with ultrasound mixing methods, and their activities were tested in selective CO methanation. Catalysts were characterized using N2 physisorption, XRD, SEM, TEM, XPS, and TPR-H2 techniques. CO methanation and selective CO methanation reactions were carried out.
13p
langthannam
29-12-2021
2
0
Download
-
The reduction in flexural strength and compressive strength at 28 days is 14% and 25%, respectively at 7% SRA dosage. In addition, SRA significantly reduces the drying shrinkage and water absorption of mortar. At 7% SRA dosage, the drying shrinkage at 53 days is reduced by 60% while the water absorption rate at 24 hours is reduced by 54%. However, SRA has a minor effect on the pore size distribution, effective porosity, and cumulative intrusion volume of mortar.
13p
inception36
30-11-2021
14
1
Download
CHỦ ĐỀ BẠN MUỐN TÌM
![](images/graphics/blank.gif)