What are environment responsive polymers?

Stimuli-responsive polymers are polymers that respond with noticeable physical or chemical changes in their behaviors with a small change of environmental stimuli variations.

Are hydrogels smart polymers?

Smart hydrogels, or stimuli-responsive hydrogels, are three-dimensional networks composed of crosslinked hydrophilic polymer chains that are able to dramatically change their volume and other properties in response to environmental stimuli such as temperature, pH and certain chemicals.

How do pH sensitive hydrogels work?

pH-sensitive hydrogels consist of a backbone polymer either containing weak acidic groups or basic groups which become more ionized in higher or lower pH environments, respectively. Mechanical stability is attributed to the backbone polymer while the ionizable component provides the pH sensitivity.

What is a Bioactuator?

bioactuator (plural bioactuators) A biological actuator, typically powered by a muscle.

What are stimuli-responsive polymers?

Stimuli-responsive polymers or so-called “smart polymers” are macromolecules that are sensitive to certain triggers from the external environment, including temperature, light, electrical or magnetic fields, and chemicals.

What are responsive materials?

Responsive polymer-based materials are capable of altering their chemical and/or physical properties upon exposure to external stimuli.

What are the three classes of hydrogels?

Hydrogels can be classified into three categories based on their origin, including synthetic polymers, natural polymers, and hybrid polymers.

Which is pH sensitive polymer?

pH-sensitive polymers can be defined as polyelectrolytes that include in their structure weak acidic or basic groups that either accept or release protons in response to a change in the environmental pH.

Which is bio responsive implant?

The term bioresponsive means to generate a biological response upon stimulation by the surrounding environment. The bioresponsive hydrogels are designed to have a conversation with surrounding biological environment and respond according to its stimulus.

What are self healing polymers used for?

These self-healing polymers are special class of smart materials, which can heal the internal defects/cracks or damage generated in any matrix and can rebuild the mechanical properties (e.g., tensile strength) of the cracked part through an autonomic healing process, as similar to the human skin when it is wounded.

What are temperature responsive polymers used for?

Temperature-responsive polymers or thermoresponsive polymers are polymers that exhibit a drastic and discontinuous change of their physical properties with temperature. The term is commonly used when the property concerned is solubility in a given solvent, but it may also be used when other properties are affected.

What are polymer hydrogels?

Hydrogels are cross-linked polymeric networks, which have the ability to hold water within the spaces available among the polymeric chains. The hydrogels have been used extensively in various biomedical applications, e.g., drug delivery, cell carriers and/or entrapment, wound management and tissue engineering.

What’s the difference between hydrogel and polymer?

Hydrogels are a class of polymer materials that can absorb large amounts of water without dissolving. The latter is due to physical or chemical crosslinkage of the hydrophilic polymer chains. Hydrogels can be prepared starting from monomers (A), prepolymers (B) or existing hydrophilic polymers (C).

What is pH responsiveness?

pH-Responsive polymers are systems whose solubility, volume, and chain conformation can be manipulated by changes in pH, co-solvent, and electrolytes. This review summarizes recent developments covering synthesis, physicochemical properties, and applications in various disciplines.

What is Gastroretentive drug delivery system?

Gastro retentive delivery systems are designed to be retained in the stomach for a prolonged time and release their active ingredients and thereby enable sustained and prolonged input of the drug to the upper part of the gastrointestinal (GI) tract.

What is novel drug delivery system?

Novel drug delivery system is a novel approach to drug delivery that addresses the limitations of the traditional drug delivery systems. Modern medicine cures a particular disease by targeting exactly the affected zone inside a patient’s body and transporting the drug to that area.

What are stimuli-responsive hydrogels?

With natural cytocompatibility and biocompatibility, hydrogels nowadays are more and more involved in various bio-applications including shape morphing, artificial muscles, soft robotics, regenerative medicine, and so on. As an important subclass, stimuli-responsive hydrogels have been attracting interest within decades.

What makes polymers responsive to multiple stimuli?

Here, we focus on the design, assembly, and applications of polymer particles, films, and hydrogels that are responsive to multiple stimuli, including biological and physical triggers (e.g., pH, reduction, enzyme, temperature, diol moieties, reactive oxygen species, ionic strength, shear stress, and light).

What are the properties of thermo-responsive hydrogels?

The hydrogels based on polysaccharides incorporated with thermo-responsive polymers have shown unique properties such as biocompatibility, biodegradability, and biological functions in addition to the stimuli-responsive characters.

What is a smart hydrogel?

These “smart” hydrogels exhibit single or multiple stimuli-responsive characters which could be used in biomedical applications, including controlled drug delivery, bioengineering or tissue engineering.