The swelling mechanism on a molecular scale can be better understood thanks to the PALS study of XAD7 wetted with binary mixtures. Dry XAD7 has a developed structure of free spaces of various sizes, which results in a quite complex pore size distribution (PSD) (Fig. 2).There is a wide peak in the range of mesopores and several …
Five organic solvents, N-methyl-2-pyrrolidone (NMP), cyclohexanone (CYC), N,N-dimethylformamide (DMF), acetonitrile (ACN), and toluene (TOL) were used to treat Shenhua direct coal liquefaction residue (DCLR) by swelling processes.The treated residues were characterized by swelling degree (Q), SEM, FTIR, TG-DTG, and Py …
Hemicellulose-based composite hydrogels were successfully prepared by adding polydopamine (PDA) microspheres as reinforcing agents. The effects of PDA microsphere size, dosage, and nitrogen content in hydrogel on the mechanical and rheological properties was studied. The compressive strength of hydrogel was increased …
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The resulting microspherical particles are easily removed by filtration or centrifugation from the continuous organic phase. Upon drying, these particles or beads will directly provide a free flowing powder. ... Depending on the manufacturing process and …
In this work, a new super adsorbent N-isopropylacrylamide (NIPAAm)/itaconic acid (IA)/Pumice composite hydrogels were prepared by γ-radiation copolymerization of NIPAAm and itaconic acid (IA) in an aqueous solution with Pumice as a crosslinker.The stimuli responsiveness, swelling properties and mechanical properties …
2.2 Preparation of AL-based gels and reference gels 2.2.1 Purification of AL. AL was produced by Guangzhou Yinnovator Biotech Co. (Guangzhou, ... These results demonstrate the significant potential of the AL-P22 gel swollen in organic solvents containing lithium salts for application in energy storage devices. The properties of gel electrolytes ...
Abstract A series of ammonium-succinic salts (ASS) was prepared from succinic acid and amines as small molecule shale swelling inhibitor. It was evaluated by bentonite linear expansion test, anti-swelling experiments. And then the best one, ASS-8 (synthesize with succinic acid and tetraethylenepentamine with the ratio of acid group to …
Of note, the swollen hydrogels prepared with a monomer concentration of 5.0 mol% and a cross-linker content of 0.005 mol% cannot be cut with a knife despite their …
Swelling percentage of these modified organogels in divers organic solvents becomes more than 100 times greater their dried weights and become up to 1600 times their dry dimension in CHCl 3. By the expansion of polymer networks, even in low-dielectric mediums (3 < ε < 10), ion separation occurs well and increases the ability of organogels …
In this paper, mixed metal hydroxide (MMH) was prepared via MgCl2 and AlCl3 by the co-precipitation method and characterized by XRD, TGA laser and particle size analysis. The inhibitory effect of MMH on the swelling of clay was evaluated by linear expansion, mud ball, laser particle size analysis, X-ray diffraction analysis and TGA. The …
Thawing is exactly the contrary process of freezing and carried out in mild temperature conditions without any aid of organic solvents. The freeze-thawing process …
Liquid electrolytes are expensive and harmful to human beings due to their organic nature. Therefore, hydrogel electrolytes have been introduced into these devices. ... non-toxicity, good biocompatibility and biodegradability, ease of modification and preparation, low cost, and renewable physico-chemical ... Swelling kinetics studies …
where W 2 is the weight of the dry gel (in g) while W 1 is the weight (in g) of the gel after water absorption.. 2.3.2 FTIR analysis of the hydrogel. The hydrogel was dried and ground to a powder form. A sample was prepared using a KBr tablet and was analyzed by using a TENSOR27 FTIR spectrometer (Bruker, Karlsruhe, German).
Preparation of chitosan/different organomodified clay polymer nanocomposites: studies on morphological, swelling, thermal stability and anti-bacterial properties August 2016 DOI: 10.17586/2220 ...
DOI: 10.1016/J.SSI.2013.12.043 Corpus ID: 97371211; Multiwalled carbon nanotube–polyelectrolyte gels: Preparation and swelling behavior for organic solvents @article{Pourjavadi2014MultiwalledCN, title={Multiwalled carbon nanotube–polyelectrolyte gels: Preparation and swelling behavior for organic solvents}, author={Ali Pourjavadi …
The use of this non‐swelling hydrogel for the adsorption of ferrous ions holds promise for efficient, simple and fast operation in the field of wastewater treatment in the future. Discover the ...
The polymer was found to have excellent swelling capacity in various oils and organic solvents and showed good selective absorption capacity. The reusability of the synthesized polymer was studied and it was found that it could be reused for more than 30 absorption desorption cycles without undergoing much change in its absorption capacity ...
Clay tablet preparation. Compacted bentonite tablets of 20 mm diameter and 3.8 mm thickness were prepared by applying a uniaxial pressure of 63 MPa, ... The swelling rate vs solvent property correlations were only applied for the bulk properties of the organic solvents, since swelling in water did not show linear behaviour.
Preparation of dextran hydrogels was then carried out by UV irradiation of MA-dextrans [6]. ... Swelling power, ... these well-known macromolecular reactions of functional polymers with reactive organic compounds there can be proposed the following general scheme of the crosslinking reactions in the Dx/POC1 3 systems in the chosen …
The swelling reaches an equilibrium within 24 h and hence the corresponding aerogels from 24 and 48 h of swelling have the highest pore volume and lowest relative density, achievable by the ...
Instead, mix the ginger oil with vaseline to make a salve. Start with a one to 10 ratio of ginger oil to vaseline, Dr. Madan advises — that's about seven or so drops of oil per teaspoon of ...
In this work, a comparative study of the swelling behavior of poly((1,7,7-trimethyl-2-bicyclo[2.2.1]heptanyl) prop-2-enoate) (poly(IBOA)) and its copolymer …
2.1 Design and Preparation of Shell-Structured DN Hydrogels. ... The swelling ratio of CS/PACG-Na + and CS/PACG-Ca 2+ hydrogels increased by ≈5110% …
In this work, a comparative study of the swelling behavior of poly((1,7,7-trimethyl-2-bicyclo[2.2.1]heptanyl) prop-2-enoate) (poly(IBOA)) and its copolymer (poly(IBOA)-co-2-EHA)), prepared by radical polymerization with the addition of a low concentration of crosslinking agent and photoinitiator, was performed. The obtained …
The swelling reaches an equilibrium within 24 h and hence the corresponding aerogels from 24 and 48 h of swelling have the highest pore volume and …
The SAP maintaining high swelling capacity in the pH range of 5–9 indicated its wide application values in the acidic or alkaline environment at high temperature. In addition, the SAP exhibited good reusability which could still retain about 73% of its initial water absorbency after reswelling six times at 150 °C.
The SAP maintaining high swelling capacity in the pH range of 5–9 indicated its wide application values in the acidic or alkaline environment at high temperature. In …
Liquid electrolytes are expensive and harmful to human beings due to their organic nature. Therefore, hydrogel electrolytes have been introduced into these …
Preparation of lignin-containing cellulose nanofibers Melon vine (MV) was cut into small pieces and dried in an oven under 60 ℃ for 24 h, and crushed with a small pulverizer. The MV powder was placed in a flask with DMSO/KOH pseudosolvent (solid to liquid=1:10, 1:20, 1:50, 1:80, and 1:100) and the mixture was stirred at 30 ℃, 60 ℃, and …
