What are the properties and characteristics of smart polymers?
Smart polymers tend to have an all-or-nothing response, and are completely predictable, with the change being uniform throughout the material. They might alter their conformation, adhesiveness or water retention properties, and can return to their initial state when the stimulus ends.
What is an example of a smart polymer?
Examples of smart polymers are those that undergo rapid, reversible phase changes in response to small changes in environmental conditions. Ista and Lopez employed poly(N-isopropylacryl-amide) (PNIPAAM), a polymer that is soluble in water below, but insoluble above, 32°C.
How are Nanogels formed?
Nanogels are three-dimensional hydrogel materials in the nanoscale size range formed by crosslinked swellable polymer networks with a high capacity to hold water, without actually dissolving into the aqueous medium.
What are the downsides of using smart polymers?
In spite of these advantages several drawbacks associated with these systems include high-burst drug release, low mechanical strength of the gel leading to potential dose-dumping, lack of biocompatibility of the polymeric system and gradual lowering of pH of the system due to acidic degradation14,15.
How the properties of smart polymers are used for various biological applications?
They are used for sensors and actuators such as artificial muscles , the production of hydrogels, biodegradable packaging, and to a great extent in biomedical engineering . One example is a polymer that undergoes conformational change in response to pH change, which can be used in drug delivery.
What are nanogels used for?
Nanogels are established with great efficacy in the treatment of autoimmune disease, neurodegenerative disorders, diabetes, inflammatory disorders, and so many other disorders. They are effective for intracellular delivery also. Some of their applications are listed in Table 12.6.
What are the differences between hydrogels and nanogels?
In this article, we look at these innovative drug delivery systems in more detail. Nanogels, in essence, are a nanosized hydrogel. A hydrogel is a polymer-based gel that is constructed by crosslinking polymer chains together to form a macromolecular network.
What is the most common smart material?
The most commonly available Shape Memory Alloy is Nitinol, which was originally developed by the Naval Ordinance Laboratory. SMA’s have the ability to change phase as a function of temperature, and in that process generate a force or motion. They are capable of relatively high energy but move slowly.
What are Nanogels used for?
What are the uses of smart materials?
They are used to monitor the civil engineering structures to evaluate their durability. Not only the smart materials or structures are restricted to sensing but also they adapt to their surrounding environment such as the ability to move, vibrate and demonstrate various other responses.
What are the main components of smart materials?
Types of Smart Materials
- Piezoelectrics: Piezoelectric materials convert electrical energy to mechanical energy, and vice versa.
- Shape Memory Alloys:
- Magnetostrictive:
- Shape Memory Polymers:
- Hydrogels:
- Electroactive Polymers:
- Bi-Component Fibers:
Why are dendrimers important?
Due to their size, dendrimers are used in nanomedicine research. They are found to be useful as delivery or carrier systems for drugs and genes, but studies have shown that some dendrimers have medicinal uses of their own, mostly due to their antifungal, antibacterial and cytotoxic properties [5,6].