Carboxymethyl cellulose-grafted graphene oxide for efficient antitumor drug delivery

193

AbstractIn recent years, with the higher requirements for the performance of cement-based materials and the call for energy conservation and environmental protection, a wave of research on new materials has set off, and various high-performance concrete and more environmentally friendly geopolymers have appeared in the public. With a view to solving the defects of energy consumption, environmental protection and low toughness of traditional cement-based materials. At the same time, nanomaterials have become a focus of current research. Therefore, the research on the properties of cement-based materials and geopolymers modified by graphene and its derivatives has aroused extensive interest of researchers. Graphene-based nanomaterials are one of them. Because of their large specific surface area, excellent physical properties have been favored by many researchers. This paper reviews the research progress of graphene-based nanomaterials in improving the properties of cement-based materials and geopolymer materials, and points out the main challenges and development prospects of such materials in the construction field in the future.

Section: Introductionmentioning

confidence: 99%

Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide

Liu

Huang

et al. 2020

193

“…Graphene, a single layer of carbon atoms with sp 2 chemical bonds, is the base for all nanoscale carbon materials such as fluorine bucky balls and carbon nanotubes (CNTs) [13][14][15][16][17][18][19][20]. Simple production procedures in comparison with other carbon nanomaterials and several properties, including zero band gap, high conductivity, flexibility, exceptional chemical stability, extremely wide porous structure, high specific surface area, high mobility of charge carriers and cost efficiency, make the graphene a promising nanomaterial for the next era [21].…”

Section: Introductionmentioning

confidence: 99%

A highly sensitive biosensor based on methacrylated graphene oxide-grafted polyaniline for ascorbic acid determination

Naghib

Behzad

Rahmanian

et al. 2020

Functionalized graphene-based nanocomposites have opened new windows to address some challenges for increasing the sensitivity, accuracy and functionality of biosensors. Polyaniline (PANI) is one of the most potentially promising and technologically important conducting polymers, which brings together the electrical features of metals with intriguing properties of plastics including facile processing and controllable chemical and physical properties. PANI/graphene nanocomposites have attracted intense interest in various fields due to unique physicochemical properties including high conductivity, facile preparation and intriguing redox behavior. In this article, a functionalized graphene-grafted nanostructured PANI nanocomposite was applied for determining the ascorbic acid (AA) level. A significant current response was observed after treating the electrode surface with methacrylated graphene oxide (MeGO)/PANI nanocomposite. The amperometric responses showed a robust linear range of 8–5,000 µM and detection limit of 2 µM (N = 5). Excellent sensor selectivity was demonstrated in the presence of electroactive components interfering species, commonly found in real serum samples. This sensor is a promising candidate for rapid and selective determination of AA.

“…GO has been widely used in medicine field owning to its large plain surface area which provides advantages for drug and protein delivery [4]. Jiao et al [5] loaded different amounts of drugs on carboxy-methyl cellulose-grafted graphene oxide, and high drug-loading efficiency and encapsulation efficiency were achieved, which could reach 39.33% and 29.50%. Innovative nano-drug (Ori@GE11-GO) was prepared to recognize the specific tumour cells, and improve anticancer efficiency [6].…”

Section: Introductionmentioning

confidence: 99%

The multiscale enhancement of mechanical properties of 3D MWK composites via poly(oxypropylene) diamines and GO nanoparticles

Zuo

Hui

et al. 2019

Interfacial bonding between the fibers and matrix plays a large role in mechanical properties of composites. In this paper, poly(oxypropylene) diamines (D400) and graphene oxide (GO) nanoparticles were grafted on the desized 3D multi axial warp knitted (MWK) glass fiber (GF) fabrics. The surface morphology and functional groups of modified glass fibers were characterized by scanning electron microscopy (SEM) and fourier transform infrared spectra (FT-IR). Out-of-plane compression properties and the failure mechanisms of composites at different temperature were tested and analyzed. The results revealed that GO nanoparticles were successfully grafted on fibers under the synergistic effect of D400. In addition, D400-GO-grafted composite possessed the highest mechanical properties than desized composite and GO-grafted composite. Their strength and modulus were improved by 10.16%, 10.06%, 8.92%, 8.75%, 7.76% and 40.38%, 32.74%, 29.85%, 26.98%, 25.16% compared to those of desized composites at 30∘C, 60∘C, 90∘C, 120∘C, 150∘C, respectively. The damage to D400-GO-grafted composite was yarns fracture accompanied with fibers breakage, matrix cracking, interface debonding. At higher temperature, interlayer slipping with matrix plasticization was the main failure mode.