Developments and new applications of UV-induced surface graft polymerizations

Surface Photografting of Novel Sulfobetaine Copolymers on Silica

“…The copolymer I is highly polar. In the end, the partial double bond in maleimide ring proposed by the DFT computations might be assigned to the 128 ppm peak in C 13 NMR spectra as shown in Figure 5. Table 2 shows the solubility of polymers in various solvents.…”

“…Physical deposition by and large results in noncovalently bound coatings. Developments in UV-induced surface graft polymerization was reviewed by Deng et al and concluded that surface graft polymerizations induced by UV irradiation exhibit some advantages over other modification methods, e.g., fast reaction rate, low cost of processing, simple equipment, easy industrialization, and may be the most important, the distribution of grafted chains is limited to a shallow region near the surface [13]. Surface photografting polymerization was also found to offer the unique ability to alter and maneuver surface properties with no damage to bulk properties.…”

Surface modification of polyurethane via covalent immobilization of sugar-based trisiloxane surfactants

“…[11][12][13][14][15][16] Among these methods, photochemical treatment induced by UV irradiation is the most promising approach for its fast reaction rate, low cost of processing, simple equipment, and easy industrialization. [17] What's more, it is an effective way to directly immobilize various biocompatible moieties, such as poly(ethylene glycol), [18,19] poly(N-vinyl pyrrolidone), [20] heparin, [21,22] phospholipid polymer, [23][24][25] chitosan, [26][27][28] glycopolymers, [29] and hyaluronic acid [15] onto the surface of a substrate to obtain a target performance.…”

Advanced microgel-functionalized polyester textiles adaptive to ambient conditions

“…In the first case of UV irradiation, any type of polyester (aminated or not) can be used, as well as all microgel types studied in Chapter 1, regardless of whether or not they contain chitosan. The reason is that, upon UV irradiation, excited photo-initiator molecules generate free radicals by abstracting hydrogen atoms from any macromolecule they interact with (Deng et al 2009), whether it is of PET, PNIAA or CS origin. These radicals are capable of initiating surface graft (anchoring) reactions between PET, aminated or not, and any microgel component if it can provide hydrogen atoms.…”

“…In general, benzophenone is a widely used photo-initiator of the Norrish II type * (He et al 2009); upon UV irradiation its molecules shift from an excited singlet to a triplet state by intersystem crossing (ISC) (Deng et al 2009). Being in that state, they initiate hydrogen-abstraction reactions from substrates, consequently providing surface radicals (Ranby 1998).…”