With the rapid development of photopolymerization, search for new near-UV/visible light sensitive photoinitiating system (PIS) is one most interesting topics in polymerization area. In this work, a PIS (chalcone dye/amine/iodonium salt) could efficiently and simultaneously initiate free radical photopolymerization polyethylene glycol diacrylate (PEGDA) cationic (CP) 3,4-epoxycyclohexylmethyl-3,...

In this work, we present a class of hydrogels that leverage the favorable properties of the photo-cross-linkable hyaluronic acid (HA) and semi-interpenetrating collagen components. The mechanical properties of the semi-interpenetrating-network (semi-IPN) hydrogels far surpass those achievable with collagen gels or collagen gel-based semi-IPNs. Furthermore, the inclusion of the semi-interpenetra...

Highly-regulated signals surrounding stem cells, such as growth factors at specific concentrations and matrix mechanical stiffness, have been implicated in modulating stem cell proliferation and maturation. However, tight control of proliferation and lineage commitment signals is rarely achieved during growth outside the body, since the spectrum of biochemical and mechanical signals that govern...

Cross-linking of poly(vinyl alcohol) (PVA) creates a three-dimensional network by bonding adjacent polymer chains. The cross-linked structure, upon immersion in water, turns into hydrogel, which exhibits unique absorption properties due to the presence hydrophilic groups within PVA chains and, simultaneously, ceases be soluble water. can adjusted chemical modification or blending with other sub...

A reversible switchable on-demand UV-triggered drug delivery system (DDS) based on interpenetrating polymer networks (IPNs) with silicone as the host and spiropyran (SP)-functionalized guest is designed demonstrated. The photo-responsive IPNs provide a new triggered concept they exploit change in intermolecular interactions (work of adhesion) among drug, matrix, solvent when incorporated hydrop...

Polymers have always been valuable excipients in conventional dosage forms, also have shown excellent performance into the parenteral arena, and are now capable of offering advanced and sophisticated functions such as controlled drug release and drug targeting. Advances in polymer science have led to the development of several novel drug delivery systems. Interpenetrating polymer networks (IPNs...

Polymer nanocomposites with exceptionally high mechanical properties owing to strong interfacial attraction have garnered tremendous interest in the research community. In general, tough and robust polymer are usually obtained via dispersing a nano-flaky filler matrix, although strategy is only sometimes practically viable. To this end, work, facile has been adopted achieve nanocomposite. A nov...