Studies on Syntheses, Spectral, Thermal and Hydrophobic Behavior of Cardanol Based Tetra Functional Benzoxazines

2021 ◽  
Vol 63 (6) ◽  
pp. 679-689
Author(s):  
Midhina TJ ◽  
Arumugam Hariharan ◽  
Krishnasamy Balaji ◽  
Muthukaruppan Alagar
Keyword(s):  
Hydrophobic Behavior

Hydrophobic Behavior of Selected Bacillus Spores

1988 ◽  
Vol 21 (4) ◽  
pp. 367
Author(s):  
D. Melnyk ◽  
G. Blank ◽  
M.A.H. Ismond
Keyword(s):  
Hydrophobic Behavior ◽  
Bacillus Spores

scholarly journals PROPERTIES IMPROVEMENT ON POLYESTER FABRIC USING POLYVINYL ALCOHOL

2021 ◽  
Vol 8 (8) ◽  
pp. 27-41
Author(s):  
JEYAKODI MOSES ◽  
Sathish P. ◽  
Keerthivasan M. ◽  
Pragadeesh R.J. ◽  
Pranesh A.
Keyword(s):  
Polyvinyl Alcohol ◽  
Polyethylene Terephthalate ◽  
Textile Industry ◽  
Fibrous Material ◽  
Polyester Fabric ◽  
Synthetic Ester ◽  
Hydrophobic Behavior ◽  
Hydrophilic Character ◽  
Textile Industries ◽  
The Aesthetic

Polyethylene terephthalate is one of the important synthetic ester polymeric material used in widespread areas.  In textile industry, this fibrous material finds use in most of the garment and apparel applications due to its ease of handling, maintenance, and drying and competes with cotton materials.  However, due to the maximum hydrophobic behavior, this textile material gives number of issues like accumulation of statics, negligible moisture content, poor comfort and aesthetic characters.  Hence, in order to use this polyester material in the general textile industries particularly for garment and apparel productions, it is necessary to increase to some extent of its hydrophilic character by the application of some suitable chemicals like polyvinyl alcohol.  In these context, in this work an attempt is made to treat the polyethylene terephthalate fabric with sodium hydroxide followed by polyvinyl alcohol so as to increase the aesthetic properties.  The output received after the polyvinyl alcohol treatment on this fabric gives the good results expected for the garment applications.  

Effect of benzoyl treatment on the performance of sugar palm/kenaf fiber-reinforced polypropylene hybrid composites

2021 ◽  
pp. 004051752110432
Author(s):  
S Mohd Izwan ◽  
SM Sapuan ◽  
MYM Zuhri ◽  
AR Muhamed
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characteristics ◽  
Hybrid Composites ◽  
Physical And Mechanical Properties ◽  
Morphological Properties ◽  
Fiber Reinforced ◽  
Kenaf Fiber ◽  
A Value ◽  
Hydrophobic Behavior ◽  
Sugar Palm Fiber

The main purpose of this work is to investigate the effect of benzoyl treatment on the performance of sugar palm/kenaf fiber-reinforced polypropylene hybrid composites. Water absorption tests were carried out to confirm the effect of benzoylation treatment toward fabricating a more hydrophobic behavior of the hybrid composites. Both treated and untreated composites that have 10 wt.% of fiber loading with three different fiber ratios between sugar palm and kenaf (7:3, 5:5, 3:7) were analyzed. Physical and mechanical properties such as tensile, flexural, and impact strength were determined from this study. Morphological properties were obtained using scanning electron microscopy (SEM). It was found that the tensile strength of sugar palm/kenaf-reinforced polypropylene hybrid composites was improved with the treatment of benzoyl with a value of 19.41 MPa. In addition, hybrid composite with treated sugar palm and kenaf fiber T-SP3K7 recorded the highest impact and flexural strength of 19.4 MPa and 18.4 MPa, respectively. In addition, SEM demonstrated that surface treatment enhanced the mechanical properties of the hybrid composites. Overall, it can be suggested that benzoyl-treated composites with a higher volume of kenaf fiber than sugar palm fiber will improve the mechanical characteristics of the hybrid composites.

Novel production techniques for solid solution Nb–Y–N films with improved tribological properties and hydrophobic behavior

Vacuum ◽  
2021 ◽  
Vol 194 ◽  
pp. 110621
Author(s):  
Ping Ren ◽  
Yanxin Si ◽  
Ganggang Wang ◽  
Xiaoyang Yang ◽  
Suxuan Du ◽  
...  
Keyword(s):  
Solid Solution ◽  
Tribological Properties ◽  
Hydrophobic Behavior ◽  
Production Techniques

scholarly journals AACVD Synthesis and Characterization of Iron and Copper Oxides Modified ZnO Structured Films

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 471 ◽  
Author(s):  
Martha Claros ◽  
Milena Setka ◽  
Yecid P. Jimenez ◽  
Stella Vallejos
Keyword(s):  
Contact Angle ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Contact Angles ◽  
Copper Oxides ◽  
Water Contact ◽  
X Ray ◽  
Hydrophobic Behavior

Non-modified (ZnO) and modified (Fe2O3@ZnO and CuO@ZnO) structured films are deposited via aerosol assisted chemical vapor deposition. The surface modification of ZnO with iron or copper oxides is achieved in a second aerosol assisted chemical vapor deposition step and the characterization of morphology, structure, and surface of these new structured films is discussed. X-ray photoelectron spectrometry and X-ray diffraction corroborate the formation of ZnO, Fe2O3, and CuO and the electron microscopy images show the morphological and crystalline characteristics of these structured films. Static water contact angle measurements for these structured films indicate hydrophobic behavior with the modified structures showing higher contact angles compared to the non-modified films. Overall, results show that the modification of ZnO with iron or copper oxides enhances the hydrophobic behavior of the surface, increasing the contact angle of the water drops at the non-modified ZnO structures from 122° to 135° and 145° for Fe2O3@ZnO and CuO@ZnO, respectively. This is attributed to the different surface properties of the films including the morphology and chemical composition.

Dynamic hydrophobic behavior of water droplets impact on the cotton fabrics coated with POSS block copolymer

Cellulose ◽  
2019 ◽  
Vol 27 (3) ◽  
pp. 1705-1716
Author(s):  
Que Kong ◽  
Zuoliang Zhang ◽  
Zhiguang Li ◽  
Xuehong Ren
Keyword(s):  
Block Copolymer ◽  
Cotton Fabrics ◽  
Water Droplets ◽  
Hydrophobic Behavior

scholarly journals Effect of Eugenol on Cell Surface Hydrophobicity, Adhesion, and Biofilm ofCandida tropicalisandCandida dubliniensisIsolated from Oral Cavity of HIV-Infected Patients

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Suelen Balero de Paula ◽  
Thais Fernanda Bartelli ◽  
Vanessa Di Raimo ◽  
Jussevania Pereira Santos ◽  
Alexandre Tadachi Morey ◽  
...  
Keyword(s):  
Cell Surface ◽  
Oral Cavity ◽  
Biofilm Formation ◽  
Cell Surface Hydrophobicity ◽  
Surface Hydrophobicity ◽  
Planktonic Cells ◽  
Hydrophobic Behavior ◽  
Significant Difference ◽  
Substrate Surfaces ◽  
Sessile Cells

MostCandidaspp. infections are associated with biofilm formation on host surfaces. Cells within these communities display a phenotype resistant to antimicrobials and host defenses, so biofilm-associated infections are difficult to treat, representing a source of reinfections. The present study evaluated the effect of eugenol on the adherence properties and biofilm formation capacity ofCandida dubliniensisandCandida tropicalisisolated from the oral cavity of HIV-infected patients. All isolates were able to form biofilms on different substrate surfaces. Eugenol showed inhibitory activity against planktonic and sessile cells ofCandidaspp. No metabolic activity in biofilm was detected after 24 h of treatment. Scanning electron microscopy demonstrated that eugenol drastically reduced the number of sessile cells on denture material surfaces. MostCandidaspecies showed hydrophobic behavior and a significant difference in cell surface hydrophobicity was observed after exposure of planktonic cells to eugenol for 1 h. Eugenol also caused a significant reduction in adhesion of mostCandidaspp. to HEp-2 cells and to polystyrene. These findings corroborate the effectiveness of eugenol againstCandidaspecies other thanC. albicans, reinforcing its potential as an antifungal applied to limit both the growth of planktonic cells and biofilm formation on different surfaces.

Vertically aligned CNT arrays: structural integrity and surface properties

2016 ◽  
Vol 7 (6) ◽  
pp. 703-711 ◽  
Author(s):  
Dimitris K. Perivoliotis ◽  
Malamatenia A. Koklioti ◽  
Elias P. Koumoulos ◽  
Yiannis S. Raptis ◽  
Costas A. Charitidis
Keyword(s):  
Contact Angle ◽  
Structural Integrity ◽  
Mechanical Performance ◽  
Content Type ◽  
Cvd Method ◽  
Angle Measurements ◽  
Hydrophobic Behavior ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
Cnt Arrays

Purpose Carbon nanotube-based architectures have increased the scientific interest owning to their exceptional performance rendering them promising candidates for advanced industrial applications in the nanotechnology field. Despite individual CNTs being considered as one of the most known strong materials, much less is known about other CNT forms, such as CNT arrays, in terms of their mechanical performance. The paper aims to discuss these issues. Design/methodology/approach In this work, thermal CVD method is employed to produce VA-MWCNT carpets. Their structural properties were studied by means of SEM, XRD and Raman spectroscopy, while their hydrophobic behavior was investigated via contact angle measurements. The resistance to indentation deformation of VA-MWCNT carpets was investigated through nanoindentation technique. Findings The synthesized VA-MWCNTs carpets consisted of well-aligned MWCNTs. Static contact angle measurements were performed with water and glycerol, revealing a rather super-hydrophobic behavior. Originality/value The structural analysis, hydrophobic behavior and indentation response of VA-MWCNTs carpets synthesized via CVD method are clearly demonstrated.

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