scholarly journals In Situ Synthesis of Au Nanoparticles on Viscose Cellulose Sponges for Antibacterial Activities

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1281 ◽  
Author(s):  
Mingjing Shan ◽  
Chang Liu ◽  
Lei Shi ◽  
Lei Zhang ◽  
Yuan Lin ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Mechanical Properties ◽  
Thermal Stability ◽  
Au Nanoparticles ◽  
Mechanical Performance ◽  
Antibacterial Activities ◽  
In Situ Synthesis ◽  
Zone Of Inhibition ◽  
Industrial Level

Antibacterial viscose cellulose sponges (VCSs) were fabricated by heating cellulose xanthogenate (viscose) containing HAuCl4·nH2O. Viscose was used as the reducing agent and stabilizer for the in situ synthesis of Au nanoparticles (AuNPs) onto the VCSs. The morphology, structures, thermal properties, mechanical performance, and antibacterial activities of the sponges were investigated. Results indicate that AuNPs were uniformly immobilized in the VCSs, and the resulting complexes (AuNPs@VCSs) showed enhanced thermal stability and mechanical properties. Additionally, the AuNPs@VCSs exhibited remarkable antibacterial activities, with zone of inhibition diameter of 35.7 and 37.1 mm for Staphylococcus aureus and Escherichia coli, respectively. The process is simple and applicable at the industrial level and can be applied to the fields of cleaning and sanitation.

scholarly journals In situ synthesis of MWCNT-graft-polyimides: thermal stability, mechanical property and thermal conductivity

RSC Advances ◽  
2020 ◽  
Vol 10 (23) ◽  
pp. 13517-13524
Author(s):  
Chunbo Wang ◽  
Bing Cong ◽  
Junyu Zhao ◽  
Xiaogang Zhao ◽  
Daming Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Mechanical Property ◽  
Thermal Stability ◽  
In Situ Synthesis ◽  
Enhanced Thermal Conductivity

In situ synthesis of MWCNT-graft-polyimides enhanced thermal conductivity at a relatively low loading.

scholarly journals Antibacterial Activities ofGinkgo bilobaL. Leaf Extracts

2011 ◽  
Vol 11 ◽  
pp. 2237-2242 ◽  
Author(s):  
S. C. Sati ◽  
Savita Joshi
Keyword(s):  
Escherichia Coli ◽  
Inhibitory Concentration ◽  
Methanol Extract ◽  
Antibacterial Activities ◽  
Erwinia Chrysanthemi ◽  
Disc Diffusion ◽  
Zone Of Inhibition ◽  
Leaf Extracts ◽  
Hexane Extracts ◽  
Broth Dilution

The antibacterial activity of methanol, ethanol, chloroform, and hexane extracts of the leaves of Himalayan gymnospermous plantGinkgo bilobaL. was assessed against five animal and plant pathogenic strains (Agrobacterium tumefaciens, Bacillus subtilis, Escherichia coli, Erwinia chrysanthemi, and Xanthomonas phaseoli) employing disc-diffusion and broth-dilution assays. The methanol extract showed the highest activity (zone of inhibition of 15–21 mm) followed by ethanol (14–19 mm), chloroform (15–20 mm), and hexane (14–19 mm) extracts at 250 μg/mL. A minimum inhibitory concentration (MIC) of 7.8 μg/mL was found for the methanol extract against most of the pathogens tested.

scholarly journals Mechanical Properties of In-Situ Synthesis of Ti-Ti3Al Metal Composite Prepared by Selective Laser Melting

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1121 ◽  
Author(s):  
Li ◽  
Liang ◽  
Tian ◽  
Yang ◽  
Xie ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Selective Laser Melting ◽  
Melting Process ◽  
In Situ Synthesis ◽  
Metal Composite ◽  
Dispersion Strengthening ◽  
Laser Melting ◽  
Compression Properties

Titanium composite strengthened by Ti3Al precipitations is considered to be one of the excellent materials that is widely used in engineering. In this work, we prepared a kind of Ti-Ti3Al metallic composite by in-situ synthesis technology during the SLM (selective laser melting) process, and analyzed its microstructure, wear resistance, microhardness, and compression properties. The results showed that the Ti-Ti3Al composite, prepared by in-situ synthesis technology based on SLM, had more homogeneous Ti3Al-enhanced phase dispersion strengthening structure. The grain size of the workpiece was about 1 μm, and that of the Ti3Al particle was about 200 nm. Granular Ti3Al was precipitated after the aluminum-containing workpiece formed, with a relatively uniform distribution. Regarding the mechanical properties, the hardness (539 HV) and the wear resistance were significantly improved when compared with the Cp-Ti workpiece. The compressive strength of the workpiece increased from 886.32 MPa to 1568 MPa, and the tensile strength of the workpiece increased from 531 MPa to 567 MPa after adding aluminum. In the future, the combination of in-situ synthesis technology and SLM technology can be used to flexibly adjust the properties of Ti-based materials.

In situ synthesis of ternary BaTiO3/MWNT/PBO electromagnetic microwave absorption composites with excellent mechanical properties and thermostabilities

2015 ◽  
Vol 3 (15) ◽  
pp. 8205-8214 ◽  
Author(s):  
Jia Wei ◽  
Shuo Zhang ◽  
Xiaoyun Liu ◽  
Jun Qian ◽  
Jiasong Hua ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microwave Absorption ◽  
In Situ Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties

BaTiO3/MWNT/PBO ternary composites with excellent microwave absorption properties, mechanical properties and thermostabilities.

Effect of Dehydration Methods on Mechanical Strength of Nanohydroxyapatite/Collagen Composites

2007 ◽  
Vol 330-332 ◽  
pp. 349-352
Author(s):  
Xiao Yan Lin ◽  
Xu Dong Li ◽  
Xing Dong Zhang
Keyword(s):  
Mechanical Properties ◽  
Binding Energy ◽  
Freeze Drying ◽  
Bending Strength ◽  
Bond Formation ◽  
In Situ Synthesis ◽  
Drying Methods ◽  
Key Factors ◽  
Air Drying

Hydroxyapatite/collagen composites were prepared in-situ synthesis. The composites were finally achieved by dehydration including air-drying and freeze-drying methods. FTIR, XPS and DSC were employed to investigate the composites dehydrated by two methods. The air-dried composites had better mechanical properties than those of the composites dried by freeze drying. Air-drying of the composite induced more bond formation and crosslink between collagen fibers and HA crystals compared with freeze-drying of the composite, as indicated by the shifting of amide A and I bands to the lower wavenumber and by the changes in the binding energy of O1s, Ca2p, and P2p, leading to the increase of the peak temperature of the composites. Collagen crosslink and bond formation in the air-dried composites were key factors to increase the bending strength of the composites. The results of this study confirm that in situ synthesis and air-dry method are effective ways to obtain nanoHA/COL composites with high mechanical properties.

In situ synthesis of easily separable Au nanoparticles catalysts based on cellulose hydrogels

2018 ◽  
Vol 50 (7) ◽  
pp. 495-501 ◽  
Author(s):  
Xiaobo Lin ◽  
Xing Han ◽  
Jiahao Wang
Keyword(s):  
Au Nanoparticles ◽  
In Situ Synthesis
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