Lanzhou Institute of Materials Development has developed a new method for surface modification of repeatable grafted polymer brushes

Lanzhou Institute of Materials Development has developed a new method for surface modification of repeatable grafted polymer brushes

Surface chemical modification plays an important role in modern chemistry, biology, materials science, applied science engineering and technology. Polymer brush is widely used as a surface modification method. Due to its wide range of applicable monomers, controllable structure, and the ability to be modified on a variety of substrates, it has become a research hotspot in various fields in recent years. Preparation of polymer brushes using surface-initiated atom transfer radical polymerization (SI-ATRP) often involves anchoring an initiator on the modified substrate, and the modified substrate is difficult to modify many times, resulting in waste.

Recently, the team led by Zhou Feng, a researcher at the Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, proposed a new method of surface modification that can be repeated multiple times. Researchers have drawn inspiration from the “spring breeze” of the prairie and “buried” the initiator as a seed in a polystyrene plastic base. After simple grinding, the initiator is re-exposed to the polystyrene surface so that the substrate can be modified many times. In combination with mechanical micromachining, hot embossing and other techniques, it is possible to modify different metal patterns on the plastic surface multiple times. In addition, due to the uniform distribution of the initiator in the bulk phase, a three-dimensional modification that is difficult to achieve with the conventional method is achieved by three-dimensional processing.

This new surface modification method is expected to be widely applied in bio-lubrication, surface metal plating, and microfluidic devices. The research results are published in "German Applied Chemistry" (Angew. Chem. Int. Ed. 2016, DOI: 10.1002/anie.201600080).

The research work was funded by the National Natural Science Foundation of China.

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