https://imechanica.org/files/Qiu_environmental_sensitive_hydrogel.pdf

Environment-sensitive hydrogels for drug delivery

On the importance and mechanisms of burst release in matrix-controlled drug delivery systems

A system and method for communicating information among members of a distributed discussion group having peripheral communication devices involves communication between the peripheral communication devices and a central agent. The central agent receives and stores messages intended for at least one other group member. It creates a notice informing the at least one other group member that such a message exists and containing a channel (e.g., a hyperlink) directly to the memory location of the message. The at least one other group member may then elect to retrieve the message and may also elect to reply to the message. Such replies are transmitted from the peripheral device of the at least one other group member to the central agent, where it is stored and associated with the original message. Messages are retained in memory, thereby causing discussions to be maintained.

Centrifugal communication and collaboration method

Photopolymerization kinetics of multifunctional monomers

Over the past century, hydrogels have emerged as effective materials for an immense variety of applications. The unique network structure of hydrogels enables very high levels of hydrophilicity and biocompatibility, while at the same time exhibiting the soft physical properties associated with living tissue, making them ideal biomaterials. Stimulus-responsive hydrogels have been especially impactful, allowing for unprecedented levels of control over material properties in response to external cues. This enhanced control has enabled groundbreaking advances in healthcare, allowing for more effective treatment of a vast array of diseases and improved approaches for tissue engineering and wound healing. In this extensive review, we identify and discuss the multitude of response modalities that have been developed, including temperature, pH, chemical, light, electro, and shear-sensitive hydrogels. We discuss the theoretical analysis of hydrogel properties and the mechanisms used to create these responses, highlighting both the pioneering and most recent work in all of these fields. Finally, we review the many current and proposed applications of these hydrogels in medicine and industry.

/pdf/stimulus-responsive-hydrogels-theory-modern-advances-and-20f2g2ofnl.pdf

Stimulus-responsive hydrogels: Theory, modern advances, and applications

Controlled release by using poly(methacrylic acid-g-ethylene glycol) hydrogels

Preparation par copolymerisation radicalaire en suspension; apres gonflement dans l'eau, les particules ont un diametre compris entre 10 et 60 μm et sont stables entre pH 4,75 et 7,4. L'augmentation de la concentration en agent de surface (PDMS-CO-PEO) entraine une distribution plus etroite des dimensions

Preparation of poly(methacrylic acid-g-ethylene oxide) microspheres

Polymerization reaction dynamics of ethylene glycol methacrylates and dimethacrylates by calorimetry

Polymers comprising reversible hydrophobic functionalities are disclosed. The preferred embodiment polymers comprise Lewis acid segments and Lewis base segments. The polymer segments are, by themselves, hydrophilic and will either swell or dissolve in water. When the segments are incorporated into a polymer according to the present invention, the segments form water-insoluble or hydrophobic complexes. Upon changes in pH, temperature or solvent type, these complexes may dissociate, giving large transitions in polymer viscosity, emulsification ability, mechanical strength or transport properties. These polymers are useful as reversible emulsifiers which form stable emulsions at acidic pH and unstable emulsions at basic pH, as water-borne thickeners having low viscosity at low pH and high viscosity at high pH, as superabsorbing resins, or as coatings for pharmaceutical or agricultural agents.

John Klier

Papers

Controlled release by using poly(methacrylic acid-g-ethylene glycol) hydrogels

Preparation of poly(methacrylic acid-g-ethylene oxide) microspheres

Polymerization reaction dynamics of ethylene glycol methacrylates and dimethacrylates by calorimetry

Polymers comprising reversible hydrophobic functionalities

Solute and penetrant diffusion in swellable polymers. VIII: Influence of the swelling interface number on solute concentration profiles and release