China
Africa
Explore chapters and articles related to this topic
Materials for 3D Printing in Medicine
Published in Harish Kumar Banga, Rajesh Kumar, Parveen Kalra, Rajendra M. Belokar, Additive Manufacturing with Medical Applications, 2023
Sümeyra Ayan, Fatih Ciftci, Mustafa Sengor, Muhammet Emin Cam, Nazmi Ekren, Oguzhan Gündüz, Cem Bülent Üstündag
The monomers of artificial polymers have a long hydrocarbon chain, consisting of carbon and hydrogen. The simplest artificial monomers are ‘ethylene’, and by polymerisation reaction, PE is formed. When polymers consist of other atoms (i.e. nitrogen, silicon or phosphorus) they are called ‘inorganic polymers’ (Katti, 2004; Wheeler, 1994). PMMA is a linear, hydrophobic chain polymer with a glassy structure at ambient temperature. Trade names are Lucite and Plexiglas. Their structure is rigid and has good light transmittance and stability. For this reason, they are used in the production of intraocular lenses and hard contact lenses. Soft contact lenses are synthesised by adding the methylol (−CH2OH) group to hydroxyethyl methacrylate (HEMA) methyl methacrylate.
Pharmaceutical Applications of Water-Soluble Polymers in Nanomedicine and Drug Delivery
Published in Shaker A. Mousa, Raj Bawa, Gerald F. Audette, The Road from Nanomedicine to Precision Medicine, 2020
Schuyler A Pruyn, Mehdi Rajabi, Mary Adeyeye, Shaker A. Mousa
There are two main classes of synthetic polymers: inorganic and organic. Examples of synthetic inorganic polymers are polysiloxane, polyphosphazene, polysilanes, silicones, polygermanes, and polystannanes. Examples of synthetic organic polymers are low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene, polyvinyl chloride (PVC), polystyrene, nylon, nylon 6, nylon 6.6, TeflonTM (poly(tetrafluoroethylene)), and thermoplastic polyurethanes (Fig. 7.2).
Pharmaceutical Applications of Water-Soluble Polymers in Nanomedicine and Drug Delivery
Published in Shaker A. Mousa, Raj Bawa, Gerald F. Audette, The Road from Nanomedicine to Precision Medicine, 2019
Schuyler A Pruyn, Mehdi Rajabi, Mary Adeyeye, Shaker A. Mousa
There are two main classes of synthetic polymers: inorganic and organic. Examples of synthetic inorganic polymers are polysiloxane, polyphosphazene, polysilanes, silicones, polygermanes, and polystannanes. Examples of synthetic organic polymers are low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene, polyvinyl chloride (PVC), polystyrene, nylon, nylon 6, nylon 6.6, TeflonTM (poly(tetrafluoroethylene)), and thermoplastic polyurethanes (Fig. 7.2).
Design of geopolymer grouts: the effects of water content and mineral precursor
Published in European Journal of Environmental and Civil Engineering, 2018
Anass Cherki El Idrissi, Emmanuel Roziere, Ahmed Loukili, Sabine Darson
Construction materials are mainly cement-based. Nevertheless, the environmental context in the world nowadays holds their production responsible for an important part of the CO2 emissions (Gartner, 2004). This led to an enquiry into alternative construction materials using byproducts such as blast furnace slag and fly ash (Hardjito, Asia, & Asia, 2010). Alkali-activated materials came out in the 1950s (Glukhovskii, Pashkov, Starchevskaya, & Rostovskaya, 1967) as a possible substitute for hydraulic cement for some applications, mainly because of their improved durability and resistance to environmental actions. Geopolymers (also known as inorganic polymers) are part of this family. They were defined by Davidovits and Quentin (1991) as amorphous aluminosilicate materials that are often synthetised by mixing an alkaline solution with a solid aluminosilicate source.
Green, lipophilic and recyclable catalysts for the aerobic oxidation of alcohols
Published in Inorganic and Nano-Metal Chemistry, 2020
Zahra Mousavi, Bahram Pourgholam, Asghar Zamani, Seyyed Meysam Abtahi Froushani
A number of these supported solid catalysts are based on synthesized amorphous alumina and silica.[17–19] These inorganic polymers show many benefits such as outstanding chemical and thermal stability, improved textural properties, good availability, and organic functions can be immobilized to the surface to afford catalytic centers. However, silica materials have also some disadvantages such as low hydrothermal stability and high cost of preparation and toxicity especially in form of nanoparticles.