The properties of nanoparticles, however, are not only dependent on their size and shape, but also are determined by surface modification. As a novel in-depth profile control agent, nanoscale water-soluble cross-linked polyacrylamide microsphere has better compatibility, sealing and oil property. To improve the salt tolerances and shearing resistance, hydrophobic monomer is introduced to invers...

The electrophoretic separation of DNA molecules is usually performed in thin slabs of agarose or polyacrylamide gel. However, DNA separations can be achieved more rapidly and efficiently within a microbore fused silica capillary filled with an uncrosslinked polymer solution. An early assumption was that the mechanism of DNA separation in polymer solution-capillary electrophoresis (PS-CE) is the...

Pressure-driven flows of high molecular weight polyacrylamide solutions are examined in nanoslits using fluorescence photobleaching. The effective viscosity of polymer solutions decreases when the channel height decreases below the micron scale. In addition, the apparent slippage of the solutions is characterized macroscopically on similar surfaces. Though slippage can explain qualitatively the...

Large amounts of wastewater containing hydroxypropyl guar gum (HPGG), polyacrylamide (PAM) and carboxymethyl cellulose (CMC) are produced in the process fracturing. In work, a Fentonlike system presence H2O2 was employed to degrade wastewater. The effects oxidant concentration, catalyst dosage, temperature pH on degradation efficiency polymer were studied detail. Results showed that prepared co...

Drought conditions after sowing threaten the seedling establishment of all seeds, including cover crops. Cover crops are commonly broadcast and, thus, often susceptible to drought stress sowing. Our hypothesis was that seed coating with superabsorbent polymers (SAPs) would enhance germination in lab and stand field by increasing water availability single seeds. Red clover (Trifolium pratense L....

Structural pre-organization of the multivalent ligands is important for successful interaction with multimeric proteins. Polymer-based heterobifunctional ligands that contain pendant groups prearranged into heterodimers can be used to probe the active site and surrounding area of the receptor. Here we describe the synthesis and activities of a series of galactose conjugates on polyacrylamide an...

Injectability of the polymer solution is a very important factor that determines effectiveness flooding for enhanced oil recovery. Here, medium and low permeability reservoir was taken as research object, effects relative molecular weight, concentration core on flow injection performance partially hydrolyzed polyacrylamide (HPAM) with without anionic-nonionic surfactant (ANS) were studied by in...

Si anode is of paramount importance for advanced energy-dense lithium-ion batteries (LIBs). However, the large volume change as well stress generates during its lithiation-delithiation process poses a great challenge to long-term cycling and hindering application. Herein this work, composite binder prepared with soft component, guar gum (GG), rigid linear polymer, anionic polyacrylamide (APAM)....

The effects of inorganic anions such as chloride, sulfate, and phosphate on the adsorption of non ionic polyacrylamide on hematite are studied. Adsorption of the polymer is reduced in all cases, with complete depression by phosphate. The relative eff«tiveness of these anions in reducing polymer adsorption in~ in the order chloride < sulfate < phosphate. a trend which corresponds to the relative...