Solvent effects of siloxanes on donor–acceptor interactions
Researchers at Kanazawa University report in Chemical Communications how solvents influence the strength of donor–acceptor interactions. They found that silicone solvents, providing low compatibility, intensify donor–acceptor interactions between aromatic molecules compared to hydrocarbon solvents.
Factors affecting the flocculation effect of microbial flocculants
The degree of treatment of water supply, sewage, and wastewater mainly depends on the flocculation characteristics of the microbial flocculant. Therefore, a better flocculation effect can be achieved through certain treatment conditions.
Researchers have made new progress in the research of smart multicolor fluorescent polymer hydrogels
This research work preliminarily proves the feasibility of using the biomimetic multilayer core-shell structure to prepare smart multicolor fluorescent polymer hydrogels, which is expected to play an important role in the application of seafood freshness detection, information security and encryption, and flexible discoloration skin.
Precautions for the use of polyacrylamide
1. The size of the flocs, 2. The characteristics of the sludge, 3. The ionicity of polyacrylamide, 4. The dissolution of polyacrylamide, 5. When using a composite flocculant, you must pay attention to the order of addition and the time interval of dosing .
AIE-active Fluorescent Polymeric Hydrogel Emerged as Research Hotspot
Based on previous findings on AIE-active FPHs, Prof. CHEN Tao and colleagues at the Ningbo Institute of Materials Technology and Engineering (NIMTE) of the Chinese Academy of Sciences (CAS), systematically summarized the recent progress in this young but flourishing research area, with particular focus on the design and preparation of AIE-active FPHs. The study was published in Aggregate.
What are the application fields of polyacrylamide？
Polyacrylamide applications include: water treatment, sewage treatment and industrial water treatment; oil field chemical treatment agents, widely used as retention aids, filter aids, and leveling agents in the papermaking field; and used in medical materials; food industry, etc.
Factors affecting the viscosity of polyacrylamide
The viscosity of polyacrylamide solution mainly reflects the internal frictional resistance between liquid molecules due to flow or relative movement. The internal friction resistance is related to the structure of the polymer, the nature of the solvent, the concentration of the solution, temperature and pressure and other factors.
Characteristics and applications of polyacrylamide
Polyacrylamide (PAM) is a linear polymer with the chemical formula (C3H5NO)n. Polyacrylamide has a wide range of applications in industries such as petroleum exploration, water treatment, textiles, papermaking, mineral processing, medicine, and agriculture.
Fixing mechanism of fixing agent
The cationic group in the colour-fixing agent molecule and the anionic group in the dyestuff molecule are used to form an ionic bond to form a deposit on the fiber, thus reducing the water-solubility of the dyestuff and improving the color fastness of the dyed fabric.
Common types and choices of reactive dye fixing agents
The fixing agent can improve the washing fastness of the dye and resist the bad influence of the atmosphere on the dye. Common types of fixing agent: metal salt fixing agent, cationic fixing agent, reactive fixing agent.
Polyacrylamide, a widely used flocculant in water treatment
Flocculants are widely used in water treatment. They are synthetic polyacrylamide series products, mainly divided into anionic, cationic, nonionic and zwitterionic. Polyacrylamide (polyacrylamide), often abbreviated as PAM.
Main Types of organic polymer flocculants
Main Types of organic polymer flocculants: 1. It is made based on natural polymer organic matter and chemical treatment to increase its active group content. 2. Polyacrylamide series products synthesized by modern organic chemical methods. 3. It is made by grafting (or copolymerizing) natural raw materials and polyacrylamide.
Main categories and characteristics of inorganic flocculants
Mainly divided into two categories: iron preparation series and aluminum preparation series, of course, also includes its cluster of high polymer series.
Brief introduction and main classification of flocculants
According to its chemical composition, flocculants can be divided into inorganic flocculants and organic flocculants. Among them, inorganic flocculant includes inorganic coagulant and inorganic polymer flocculant; organic flocculant includes synthetic organic polymer flocculant, natural organic polymer flocculant and microbial flocculant.
Hefei Institutes of Physical Science realizes rapid detection of multiple toxic organic pollutants
Researchers have made new progress in the construction of three-dimensional flexible surface-enhanced Raman scattering (SERS) substrate and its rapid and sensitive response to organic pollutants.
Decolorization performance of PDMDAAC series flocculant
PDMDAAC series flocculants are excellent decolorizing agents, which are suitable for wastewater containing disperse dyes, and also have good decolorizing effects for wastewater containing reactive dyes that are difficult to treat.
Institute of Urban Environment has made progress in controlling the use of antibiotics in aquaculture
Related research results are published on "Environmental Pollution" under the title "Antibiotics control in aquaculture requires more than antibiotic-free feeds: A tilapia farming case".
Application of nitrogen in the pharmaceutical industry
Like the food packaging and chemical industries, the pharmaceutical industry also relies on nitrogen for various applications. In fact, pharmaceutical companies need reliable sources of high-purity nitrogen and can benefit from generating their own nitrogen internally to reduce costs while controlling quality and improving efficiency.