Micro/nano materials, products obtained by covalently modifying surface of micro/nano materials with hydrophilic materials, and method for making same
US10385013B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2018 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Nov 14, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J7/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Micro-nano materials, products obtained by covalently modifying the surfaces of micro/nano materials with hydrophilic materials, and methods for making the same. The micro/nano materials on the surfaces have carboxyl groups or/and pro-carboxyl groups which are converted into their active esters. The products are covalently modified by forming amide bonds between the active esters on the surfaces and the modification agents; where the modification agents are hydrophilic compounds and/or hydrophilic polymers bearing primary and/or secondary aliphatic amines. Monomers bearing carboxyl groups and/or pro-carboxyl groups are used to produce an adequate number of carboxyl groups and/or pro-carboxyl groups on the surface of a polymer material to be modified. The carboxyl groups and/or pro-carboxyl groups are converted into active esters. A reasonably-sized modification agent bearing primary and/or secondary amines, zwitterions and hydrophilic linear spacer arms is used to form amide bonds and obtain a covalently modified surface layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.