scholarly journals Effect of Chemically Treated Kenaf Fibre on Mechanical and Thermal Properties of PLA Composites Prepared through Fused Deposition Modeling (FDM)

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3299
Author(s):  
Aida Haryati ◽  
Nadlene Razali ◽  
Michal Petrů ◽  
Mastura Taha ◽  
Noryani Muhammad ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Polymer Matrix ◽  
Chemical Treatment ◽  
Natural Fibre ◽  
Silane Treatment ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Kenaf Fibre ◽  
Reinforcing Agent ◽  
Scanning Electron

Natural fibre as a reinforcing agent has been widely used in many industries in this era. However, the reinforcing agent devotes a better strength when embedded with a polymer matrix. Nevertheless, the characteristic of natural fibre and polymer matrix are in contrast, as natural fibre is hydrophilic, while polymer is hydrophobic in nature. Natural fibre is highly hydrophilic due to the presence of a hydroxyl group (-OH), while polymer matrix has an inherent hydrophobic characteristic which repels water. This issue has been fixed by modifying the natural fibre’s surface using a chemical treatment combining an alkaline treatment and a silane coupling agent. This modifying process of natural fibre might reduce the attraction of water and moisture content and increase natural fibre surface roughness, which improves the interfacial bonding between these two phases. In this paper, the effect of alkaline and silane treatment has been proven by performing the mechanical test, Scanning Electron Micrograph (SEM), and Fourier Transform Infrared spectrometry (FTIR) to observe the surface structure. The chemical compositions and thermal properties of the composites have been obtained by performing Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) tests. 1.0% silane treatment displayed better strength performance as compared to other composites, which was proven by performing Scanning Electron Micrograph (SEM). The assumption is that by enduring chemical treatment, kenaf fibre composites could develop high performance in industry applications.

Analytical and High-Resolution EM Study of Crystalline Phases formed at Metal-Ceramic Interface

1990 ◽  
Vol 48 (2) ◽  
pp. 426-427
Author(s):  
N. Merk ◽  
A. P. Tomsia ◽  
G. Thomas
Keyword(s):  
Cross Section ◽  
Dissimilar Materials ◽  
Ceramic Materials ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Structural Applications ◽  
Metal Ceramic ◽  
The Subject ◽  
Ceramic Compounds ◽  
Scanning Electron

A recent development of new ceramic materials for structural applications involves the joining of ceramic compounds to metals. Due to the wetting problem, an interlayer material (brazing alloy) is generally used to achieve the bonding. The nature of the interfaces between such dissimilar materials is the subject of intensive studies and is of utmost importance to obtain a controlled microstructure at the discontinuities to satisfy the demanding properties for engineering applications . The brazing alloy is generally ductile and hence, does not readily fracture. It must also wett the ceramic with similar thermal expansion coefficient to avoid large stresses at joints. In the present work we study mullite-molybdenum composites using a brazing alloy for the weldment.A scanning electron micrograph from the cross section of the joining sequence studied here is presented in Fig. 1.

Bacterial biofilm adherence to middle-ear ventilation tubes: scanning electron micrograph images and literature review

2007 ◽  
Vol 121 (10) ◽  
pp. 993-997 ◽  
Author(s):  
M Barakate ◽  
E Beckenham ◽  
J Curotta ◽  
M da Cruz
Keyword(s):  
Middle Ear ◽  
Bacterial Biofilm ◽  
Electron Micrograph ◽  
Ventilation Tube ◽  
Scanning Electron Micrograph ◽  
Chronic Infections ◽  
Middle Ear Ventilation ◽  
Conventional Antibiotics ◽  
Scanning Electron

Introduction: The organisms that cause many device-related and other chronic infections actually grow in biofilms in or on these devices. We sought to examine the role of biofilm formation in chronic middle-ear ventilation tube infection.Case report: Scanning electron micrograph images are presented which demonstrate biofilm on a middle-ear ventilation tube removed from a five-year-old child's chronically discharging ear. A review of the relevant international literature explores the role of biofilms in chronic infection and discusses potential intervention strategies.Conclusion: Biofilms may be responsible for chronic middle-ear ventilation tube infection that resists treatment with conventional antibiotics.

scholarly journals A new species, Stemonitis sichuanensis, and a newly recorded species, Stemonitis marjana (Myxogastria) from China

Phytotaxa ◽  
2016 ◽  
Vol 258 (2) ◽  
pp. 195 ◽  
Author(s):  
ZHANG BO ◽  
LI YU
Keyword(s):  
New Species ◽  
New Record ◽  
Sichuan Province ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Natural Reserve ◽  
A New Species ◽  
Scanning Electron

A new species, Stemonitis sichuanensis, collected in Gexigou National Natural Reserve, Sichuan province, China, is described herein. This new species has a columella that usually ends in an ovoid to triangular expansion at the apex of the sporotheca and small spores (about 6–7 μm in diam.). We present a scanning electron micrograph study of S. sichuanensis and a key to the species in the genus Stemonitis. Holotype specimens of S. sichuanensis are deposited in the Herbarium of the Mycological Institute of Jilin Agricultural University (HMJAU), Changchun, China. We also report a new record of another species of Stemonitis, S. marjana Y. Yamam., in this paper, specimens of which are also deposited in the HMJAU.

scholarly journals Fabrication of raw and oxidized saw dust reinforced low density polyethylene (LDPE) composites and investigation of their physico-mechanical properties

2013 ◽  
Vol 47 (4) ◽  
pp. 365-372 ◽  
Author(s):  
S Sultana ◽  
HP Nur ◽  
T Saha ◽  
M Saha
Keyword(s):  
Mechanical Properties ◽  
Mangifera Indica ◽  
Flexural Modulus ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Saw Dust ◽  
Ldpe Composites ◽  
Scanning Electron

In this research work, cellulosic waste mango (Mangifera indica) saw dust used as the reinforcing material with low density polyethylene (LDPE). A number of samples of saw dust reinforced low density polyethylene (LDPE) composites were prepared by compression moulding technique. In order to improve the mechanical properties of saw dust-LDPE composites, unbleached raw saw dust fibers were modified by oxidation using sodium hypochlorite. FT-IR spectroscopic and scanning electron micrograph (SEM) analyses were done and the results showed the evidence of positive oxidation reaction. The effects of oxidized saw dust on the performance of oxidized saw dust reinforced LDPE composites were studied comparing with the raw saw dust-LDPE composites. The effects of fiber content on the physico-mechanical properties of composites were also studied by preparing the composites with different percentage of fiber loading (from 7.5 wt% to 30 wt%) for each type of composite. Mechanical properties such as tensile strength, tensile modulus, elongation at break, flexural strength, flexural modulus of the resulting composite were measured. Better results were obtained from oxidized saw dust-LDPE composites. Scanning electron micrograph and water absorption tests were carried out for all composites and improved results were found for oxidized saw dust-LDPE composites. Bangladesh J. Sci. Ind. Res. 47(4), 365-372, 2012 DOI: http://dx.doi.org/10.3329/bjsir.v47i4.14065

Scanning Electron Micrograph and Surface Hardness of Mineral Trioxide Aggregate in the Presence of Alkaline pH

2009 ◽  
Vol 35 (5) ◽  
pp. 706-710 ◽  
Author(s):  
Mohammad Ali Saghiri ◽  
Mehrdad Lotfi ◽  
Ali Mohammad Saghiri ◽  
Sepideh Vosoughhosseini ◽  
Mohammad Aeinehchi ◽  
...  
Keyword(s):  
Surface Hardness ◽  
Mineral Trioxide Aggregate ◽  
Alkaline Ph ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Scanning Electron

Vestured Scalariform Perforation Plate Openings in Neomyrtus pedunculata

1974 ◽  
Vol 22 (2) ◽  
pp. 425 ◽  
Author(s):  
BG Butterfield ◽  
BA Meylan
Keyword(s):  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Perforation Plate ◽  
Perforation Plates ◽  
Scanning Electron

The occurrence of vestures in the corners of the last few openings at each end of the scalariform perforation plates in Neomyrtus pedunculata is recorded and illustrated with a scanning electron micrograph.

CO2 Laser Effects on Dentin Root Canals: Studies with the Scanning Electron Micrograph

1995 ◽  
Vol 13 (6) ◽  
pp. 383-386
Author(s):  
SONIA L. FERREYRA ◽  
MARTA E. CROSA ◽  
HUGO JURI ◽  
ALEJANDRO FERREYRA
Keyword(s):  
Co2 Laser ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Root Canals ◽  
Scanning Electron
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