Yellowish to yellow opaque beads are placed in a glass tray.

100–1000 nm Porosity of Macroporous Adsorption Resins in The Dry State

Macroporous adsorption resins are prepared by polymerization reaction of additives such as backbone (polymeric monomer), crosslinker, porogenic agent and dispersant. It has a high internal porosity in the dry state and a large pore size between 100 and 1000 nm.

It is generally white beads and is a kind of macroporous polymer adsorption resin without exchange groups. It has a large specific surface area and can selectively adsorb organic matter in aqueous solutions. It is mainly used in the treatment of organic wastewater and the refinement and purification of active ingredients of traditional Chinese medicine.

  • Specification
  • Features
Specification

Macroporous adsorption resins can be divided into non-polar and polar types, depending on the size of the polarity and the structure of the monomer selected. Polarity is further divided into weak polarity, medium polarity and polarity.

The absorption process of non-polar macroporous adsorption resins

Non-polar macroporous adsorption resins

It has no functional groups and is made by polymerization of monomers with very small dipole moments. Its pore surface has strong hydrophobicity and adsorbs organic substances in solution through the interaction with the hydrophobic part within the small molecule. It is suitable for adsorption of non-polar substances from polar solvents, thus becoming an aromatic adsorbent, such as styrene and diethylenebenzene polymers.

The absorption process of polar macroporous adsorption resins

Polar macroporous adsorption resins

It is a kind of adsorption resin containing amide groups, cyano groups, phenolic hydroxyl groups and other polar functional groups containing nitrogen, oxygen and sulfur that adsorb polar substances through electrostatic interactions. In chemistry, polarity refers to the uneven distribution of charges in a covalent bond or a covalent molecule.

The larger the dipole moment, the greater the polarity of the molecule; the greater the difference in electronegativity, the greater the polarity of the covalent bond.

Features
  • Wide range of applications
  • Stable physical and chemical properties
  • Excellent separation performance
  • Easy to use
  • Low solvent consumption
  • Reusable, reducing cost
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