Thermal, Mechanical, Swelling and Barrier Properties of Nanocellulose-Based Nanocomposites

Cellulosic nanoparticles generally known as nanocellulose, have got interest from the scientiﬁc community because of their biodegradability, strength, and other characteristics. Sustainability and green issues continue as top priorities for many businesses and individuals, stimulating the search for nonpetroleum-based structural materials like bionanocomposites that are biodegradable, high performing, and lightweight.

Cellulose Structure

So it can be said that because of its high biocompatibility, bio-degradability, low-cost and easy availability, cellulose finds application in disparate areas of research. Cellulose is the most abundant and renewable biopolymer in nature. It is the main constituent of plant cell walls in wood, cotton, hemp and other plant-based materials and plays an essential role in maintaining plant structural phase. Cellulose is also synthesized by marine animals such as tunicates, algae, fungi and several bacteria species. Cellulose is a carbohydrate homopolymer consisting of β-d-glucopyranose units joint together by β-1,4-glycosidic linkage. Cellulose fibrils are highly insoluble and inelastic but able to provide mechanical support to the tissues where they resides.

Crystalline cellulose has interesting mechanical properties for use in material applications. Its tensile strength is about 500MPa, similar to that of aluminium. Its stiffness is about 140–220 GPa. Films made from nanocellulose have high strength (over 200 MPa), high stiffness (around 20 GPa) and high strain(12%). Its strength/weight ratio is 8 times that of stainless steel. Fibers made from nanocellulose have high strength up to 1.57 GPa and stiffness up to 86 GPa.

Because of the positive properties given above, nanocellulose has found application in different research fields such as the biomedical, energy, environmental and water related fields.

Nanocellulose can be used in the area of paper and paperboard manufacture. Nanocelluloses are expected to enhance the fiber-fiber bond strength and, hence, have a strong reinforcement effect on paper materials.

As described above the properties of the nanocellulose makes an interesting material for reinforcing plastics. Nanocellulose improves the mechanical properties of, for example, thermosetting resins, starch-based matrixes, soy protein, rubber latex, poly(lactide). The composite applications may be for use as coatings and films, paints, foams, packaging.

Nanocellulose can be used as a low calorie replacement for today’s carbohydrate additives used as thickeners, flavour carriers and suspension stabilizers in a wide variety of food products and is useful for producing fillings, crushes, chips, wafers, soups, gravies, puddings etc. The food applications were early recognised as a highly interesting application field for nanocellulose due to the rheological behaviour of the nanocellulose gel.

Nanocellulose can be used as super water absorbent material.

Freeze-dried nanocellulose aerogels used in sanitary napkins, tampons, diapers or as wound dressing.

The use of nanocellulose as a composite coating agent in cosmetics e.g. for hair, eyelashes, eyebrows or nails.

You can get nanocellulose depending on your research needs from the link given below:

https://nanografi.com/

Titanium Carbide Powders and Applications

Titanium carbide which has the chemical formula of TiC attracted great interest for many structural applications due to its extremely high melting temperature, high hardness, high chemical resistance and good electrical conductivity. Therefore titanium carbide can be used in cutting tools, grinding wheels, wear-resistant coatings, high temperature heat exchangers, magnetic recording heads, turbine engine seals, and bullet-proof vests, etc. In addition, a promising field of application comprises plasma and flame spraying processes in air, where titanium carbide-based powders show high-phase stability. TiC(Titanium Carbide Powder) (325 mesh, 99,9+%) can also be used in biomedical implant devices. Materials used for biomedical implant devices must satisfy a variety of property demands, which are often mutually exclusive. Further, different parts of a device demand different material properties. These factors often make it difficult to manufacture a medical device using a...

Hydroxyapatite Nanopowders and Their Applications

Hydroxyapatite, is a naturally occurring mineral form of calcium apatite with the formula Ca 5 (PO 4 ) 3 (OH). Pure hydroxyapatite powder is white. Naturally occurring apatites can, however, also have brown, yellow, or green colorations, comparable to the discolorations of dental fluorosis. Hydroxyapatite Nanopowder/Nanoparticles (50 nm, 99.95+%) has been widely used as a biocompatible ceramic in many areas of medicine, but mainly for contact with bone tissue, due to its resemblance to mineral bone. In mammals, the skeleton presents a carbonated and partially substituted apatite, based on nanocrystal aggregates, and associated with collagen, building up 3-D structures present in various bone tissue conformations like trabecular or cancellous bone. There has been growing interest in developing bioactive synthetic ceramics that could closely mimic natural apatite characteristics. As mentioned before, Hydroxyapatite Nanopowder is the main inorganic constituent of bon...

New Way of Deaf-Mute Communication with 3D Graphene

Image retrieved from: http://blogs.rsc.org/cc/2016/09/01/3d-graphene-adds-dimension-to-deaf%E2%80%93mute-communication/ Chinese scientists have developed wearable electronic device with conductive 3D graphene structure to translate sign language into written text. This technology can be applied by injecting graphene ink from a syringe under printed electronic field. For medical field, such as adhesive patches which determine heart, brain signal and neural activity, wearable and bio-integrated medical devices are very important. Due to noticeable properties of cast graphene, for example a 2D honeycomb lattice, excellent mechanical and electrical behaviors, Graphene has an important material in warble technology. However, it is difficult to preserve advantages of Graphene material in a 3D material which has an information about forces from every angle. Yanlin Song and co-workers at the University of the Chinese Academy of Sciences, Beijing, and Shenyang Jianzhu University...

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