Photocatalytic Concrete Blocks Nanomodified with Zinc Oxide for Paving: Mechanical Performance and Microstructural Characteristics

2020 ◽  
Vol 50 (1) ◽  
pp. 20200326
Author(s):  
Bruno Oliveira Bica ◽  
João Victor Staub De Melo ◽  
Philippe Jean Paul Gleize
Keyword(s):  
Zinc Oxide ◽  
Mechanical Performance ◽  
Microstructural Characteristics ◽  
Concrete Blocks ◽  
Photocatalytic Concrete

Graphene oxide and zinc oxide decorated chitosan nanocomposite biofilms for packaging applications

2020 ◽  
Vol 40 (2) ◽  
pp. 152-157 ◽  
Author(s):  
Pınar Terzioglu ◽  
Yasin Altin ◽  
Ayse Kalemtas ◽  
Ayse Celik Bedeloglu
Keyword(s):  
Tensile Strength ◽  
Zinc Oxide ◽  
Graphene Oxide ◽  
Composite Film ◽  
Young’S Modulus ◽  
Mechanical Performance ◽  
Young's Modulus ◽  
Chitosan Film ◽  
Oxide Composite ◽  
Wide Range

AbstractRecently, due to sustainable development and environmental protection policies, there is increasing interest in the development of new biodegradable polymer-based multifunctional composites. Chitosan is one of the most remarkable and preferred biopolymers, which is environmentally friendly as well as renewable, biocompatible, and inexpensive. Though it has a wide range of potential applications, the major limitation of chitosan – the problem of poor mechanical performance – needs to be solved. In this work, graphene oxide was first produced and then used to manufacture a chitosan/graphene oxide/zinc oxide composite film through a casting method. The properties of the chitosan film and the chitosan/graphene oxide/zinc oxide composite film were investigated using Fourier transform infrared spectroscopy, mechanical, thermal gravimetric, and ultraviolet (UV)-visible spectroscopy analyses. The results showed that the incorporation of graphene oxide and zinc oxide into the chitosan matrix resulted in enhanced mechanical properties and thermal stability of chitosan biocomposite films. The graphene oxide- and zinc oxide-reinforced chitosan film showed 2527 MPa and 55.72 MPa of Young’s modulus and tensile strength, respectively, while neat chitosan showed only 1549 MPa and 37.91 MPa of Young’s modulus and tensile strength, respectively. Conversely, the addition of graphene oxide decreased the transmittance, notably in the UV region.

Characterization of a Limestone Powder Residue for Recycling as a Concrete Block Incorporation

2014 ◽  
Vol 798-799 ◽  
pp. 3-8 ◽  
Author(s):  
Jonas Alexandre ◽  
Afonso Rangel Garcez de Azevedo ◽  
Gustavo de Castro Xavier ◽  
Leonardo Gonçalves Pedroti ◽  
Carlos Maurício Fontes Vieira ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Physical Properties ◽  
Construction Material ◽  
Concrete Block ◽  
Limestone Powder ◽  
Small Particles ◽  
Microstructural Characteristics ◽  
Physical Chemical ◽  
Concrete Blocks

The mining and processing of limestone in the state of Rio de Janeiro, southeast of Brazil, generates a considerable amount of small particles, like a powder ,which is commercialized as a by product. In principle, this inert limestone powder could be recycled as part of another civil construction material. Thus, the objective of this work was to characterize a limestone powder by its physical properties, chemical analysis and microstructural aspects. The results were compared with the characteristics of a common cement and a conventional sand to be possibly applied in the fabrication of limestone incorporated concrete blocks. It was found that the limestone powder has physical, chemical and microstructural characteristics satisfactory for concrete blocks incorporation.

Mechanical performance of indium zinc oxide films deposited on coating-treated PMMA substrates

2019 ◽  
Vol 358 ◽  
pp. 604-610 ◽  
Author(s):  
Xuan Zhang ◽  
Yanli Zhong ◽  
Yue Yan ◽  
Zhongqi Huo ◽  
Changshan Hao ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Mechanical Performance ◽  
Oxide Films ◽  
Zinc Oxide Films ◽  
Indium Zinc Oxide

scholarly journals Dataset on microstructural characteristics and mechanical performance of homogeneous and functionally graded fibrous scaffolds

Data in Brief ◽  
2019 ◽  
Vol 27 ◽  
pp. 104718
Author(s):  
Weily Khoo ◽  
She Man Chung ◽  
Shing Chee Lim ◽  
Cheng Yee Low ◽  
Jenna M. Shapiro ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Functionally Graded ◽  
Microstructural Characteristics ◽  
Fibrous Scaffolds
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