摘要:
A cationic bis-urea compound is disclosed of formula (1): wherein: each m is independently an integer of 0 to 4, each k is independently 0 or 1, each Z′ is a monovalent radical independently selected from the group consisting of hydroxyl (*—OH), carboxyl (*—COOH), cyano (*—CN), nitro (*—NO2), sulfonate (*—SO3−), trifluoromethyl (*—CF3), halides, amine groups, ketone groups, alkyl groups comprising 1 to 6 carbons, alkoxy groups comprising 1 to 6 carbons, thioether groups comprising 1 to 6 carbons, and combinations thereof, each L′ is independently a divalent alkylene group comprising 1 to 6 carbons, wherein a *-[-L′-]k- is a single bond when k is 0, each Y′ is independently a monovalent non-polymeric radical comprising a positive charged amine, and each X′ is independently a negative charged counterion.
摘要:
A cationic bis-urea compound is disclosed of formula (1): wherein: each m is independently an integer of 0 to 4, each k is independently 0 or 1, each Z′ is a monovalent radical independently selected from the group consisting of hydroxyl (*—OH), carboxyl (*—COOH), cyano (*—CN), nitro (*—NO2), sulfonate (*—SO3−), trifluoromethyl (*—CF3), halides, amine groups, ketone groups, alkyl groups comprising 1 to 6 carbons, alkoxy groups comprising 1 to 6 carbons, thioether groups comprising 1 to 6 carbons, and combinations thereof, each L′ is independently a divalent alkylene group comprising 1 to 6 carbons, wherein a *-[-L′-]k- is a single bond when k is 0, each Y′ is independently a monovalent non-polymeric radical comprising a positive charged amine, and each X′ is independently a negative charged counterion.
摘要:
A covalently crosslinked hydrogel comprises a) three or more divalent poly(alkylene oxide) chains P′ covalently linked at respective first end units to a branched first core group C′, b) three or more divalent poly(alkylene oxide) chains P″ covalently linked at respective first end units to a branched second core group C″, the chains P″ comprising respective second end units which are covalently linked to between 0% and 100% of respective second end units of chains P′ by divalent linking groups L″, and c) at least one pendant cationic block copolymer chain A′-B′. A′-B′ comprises i) a divalent block A′ comprising a poly(alkylene oxide) backbone chain having an end unit covalently linked to a second end unit of one of the chains P′ by a divalent linking group L′, and ii) a monovalent block B′ comprising a first repeat unit, the first repeat unit comprising a backbone carbonate group and a cationic side chain group.
摘要:
A covalently crosslinked hydrogel comprises a) three or more divalent poly(alkylene oxide) chains P′ covalently linked at respective first end units to a branched first core group C′, b) three or more divalent poly(alkylene oxide) chains P″ covalently linked at respective first end units to a branched second core group C″, the chains P″ comprising respective second end units which are covalently linked to between 0% and 100% of respective second end units of chains P′ by divalent linking groups L″, and c) at least one pendant cationic block copolymer chain A′-B′. A′-B′ comprises i) a divalent block A′ comprising a poly(alkylene oxide) backbone chain having an end unit covalently linked to a second end unit of one of the chains P′ by a divalent linking group L′, and ii) a monovalent block B′ comprising a first repeat unit, the first repeat unit comprising a backbone carbonate group and a cationic side chain group.