Safe preparation, energetic performance and reaction mechanism of corrosion-resistant Al/PVDF nanocomposite films

2018 ◽  
Vol 6 (36) ◽  
pp. 17713-17723 ◽  
Author(s):  
Xiang Ke ◽  
Shuangfeng Guo ◽  
Gensheng Zhang ◽  
Xiang Zhou ◽  
Lei Xiao ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Freeze Drying ◽  
Nanocomposite Films ◽  
Corrosion Resistant ◽  
Energetic Performance

Flexible Al/PVDF nanoenergetic film prepared by vacuum freeze-drying, possesses hydrophobicity, corrosion-resistant properties as well as outstanding energetic performances.

Synthesis and characterization of corrosion-resistant and biocompatible Al2O3–TiB2 nanocomposite films on pure titanium

2020 ◽  
Vol 46 (4) ◽  
pp. 4215-4221 ◽  
Author(s):  
Fatemeh Sajedi Alvar ◽  
Mojgan Heydari ◽  
Asghar Kazemzadeh ◽  
Mohammad Reza Vaezi ◽  
Leila Nikzad
Keyword(s):  
Pure Titanium ◽  
Nanocomposite Films ◽  
Synthesis And Characterization ◽  
Corrosion Resistant

Electrospinning preparation, energetic characteristics and reaction mechanism of corrosion-resistant Si@PVDF nanostructured energetic films

2022 ◽  
Vol 237 ◽  
pp. 111887
Author(s):  
Chun Zhang ◽  
Huiqing Mao ◽  
Rui Cui ◽  
Xiandie Zhang ◽  
Jing Yang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Corrosion Resistant

scholarly journals Fabricating high thermal conductivity rGO/polyimide nanocomposite films via a freeze-drying approach

RSC Advances ◽  
2018 ◽  
Vol 8 (39) ◽  
pp. 22169-22176 ◽  
Author(s):  
Shiyang Wei ◽  
Qiaoxi Yu ◽  
Zhenguo Fan ◽  
Siwei Liu ◽  
Zhenguo Chi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Freeze Drying ◽  
Composite Films ◽  
High Thermal Conductivity ◽  
Nanocomposite Films ◽  
Polyimide Nanocomposite

PI composite films with excellent thermal conductivity (as high as 2.78 W m−1 K−1) have been fabricated by a freeze drying approach.

scholarly journals Green and low-cost synthesis of PANI–TiO2 nanocomposite mesoporous films for photoelectrochemical water splitting

RSC Advances ◽  
2015 ◽  
Vol 5 (61) ◽  
pp. 49429-49438 ◽  
Author(s):  
D. Hidalgo ◽  
S. Bocchini ◽  
M. Fontana ◽  
G. Saracco ◽  
S. Hernández
Keyword(s):  
Reaction Mechanism ◽  
Water Splitting ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
Low Cost ◽  
Photoelectrochemical Water Splitting ◽  
Light Irradiation ◽  
Nanocomposite Films ◽  
Uv Light Irradiation ◽  
Synthesis Procedure

Green and low-cost synthesis procedure for preparation of PANI/TiO2 mesoporous nanocomposite films with enhanced photocatalytic performance, thanks to a synergic reaction mechanism between PANI and TiO2 under UV light irradiation.

Ca-Histochemistry in slime mold plasmodia

1978 ◽  
Vol 36 (2) ◽  
pp. 130-131
Author(s):  
Ulrich Dierkes
Keyword(s):  
Physarum Polycephalum ◽  
Carbon Coating ◽  
Freeze Drying ◽  
Freeze Fracture ◽  
Freeze Substitution ◽  
Uranyl Acetate ◽  
Slime Mold ◽  
Staining Procedure ◽  
Protoplasmic Streaming ◽  
Intracellular Ca

Calcium is supposed to play an important role in the control of protoplasmic streaming in slime mold plasmodia. The motive force for protoplasmic streaming is generated by the interaction of actin and myosin. This contraction is supposed to be controlled by intracellular Ca-fluxes similar to the triggering system in skeleton muscle. The histochemical localisation of calcium however is problematic because of the possible diffusion artifacts especially in aquous media.To evaluate this problem calcium localisation was studied in small pieces of shock frozen (liquid propane at -189°C) plasmodial strands of Physarum polycephalum, which were further processed with 3 different methods: 1) freeze substitution in ethanol at -75°C, staining in 100% ethanol with 1% uranyl acetate, and embedding in styrene-methacrylate. For comparison the staining procedure was omitted in some preparations. 2)Freeze drying at about -95°C, followed by immersion with 100% ethanol containing 1% uranyl acetate, and embedding. 3) Freeze fracture, carbon coating and SEM investigation at temperatures below -100° C.

The Critical Point Drying Method Applied to Scanning Electron Microscopy of L-929 Cells

1970 ◽  
Vol 28 ◽  
pp. 278-279
Author(s):  
Charles TurnbiLL ◽  
Delbert E. Philpott
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
Surface Tension ◽  
Critical Point ◽  
Freeze Drying ◽  
Attractive Alternative ◽  
Crystal Formation ◽  
Critical Point Drying ◽  
Time Required ◽  
Scanning Electron

The advent of the scanning electron microscope (SCEM) has renewed interest in preparing specimens by avoiding the forces of surface tension. The present method of freeze drying by Boyde and Barger (1969) and Small and Marszalek (1969) does prevent surface tension but ice crystal formation and time required for pumping out the specimen to dryness has discouraged us. We believe an attractive alternative to freeze drying is the critical point method originated by Anderson (1951; for electron microscopy. He avoided surface tension effects during drying by first exchanging the specimen water with alcohol, amy L acetate and then with carbon dioxide. He then selected a specific temperature (36.5°C) and pressure (72 Atm.) at which carbon dioxide would pass from the liquid to the gaseous phase without the effect of surface tension This combination of temperature and, pressure is known as the "critical point" of the Liquid.

Preservation of Plant Cell Surfaces For Scanning Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 472-473
Author(s):  
Linda M. Sicko ◽  
Thomas E. Jensen
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Critical Point ◽  
Filter Paper ◽  
Freeze Drying ◽  
Cell Surfaces ◽  
Air Drying ◽  
Popular Method ◽  
Critical Point Drying ◽  
Scanning Electron

The use of critical point drying is rapidly becoming a popular method of preparing biological samples for scanning electron microscopy. The procedure is rapid, and produces consistent results with a variety of samples. The preservation of surface details is much greater than that of air drying, and the procedure is less complicated than that of freeze drying. This paper will present results comparing conventional air-drying of plant specimens to critical point drying, both of fixed and unfixed material. The preservation of delicate structures which are easily damaged in processing and the use of filter paper as a vehicle for drying will be discussed.

Scanning Electron Microscopy-cuticular Lesions on the Roundworm Ascaris Suum

1970 ◽  
Vol 28 ◽  
pp. 114-115
Author(s):  
P. A. Madden ◽  
W. R. Anderson
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Freeze Drying ◽  
Room Temperature ◽  
Secondary Electron ◽  
Distilled Water ◽  
Freeze Dried ◽  
Silver Paint ◽  
To Come ◽  
Scanning Electron

The intestinal roundworm of swine is pinkish in color and about the diameter of a lead pencil. Adult worms, taken from parasitized swine, frequently were observed with macroscopic lesions on their cuticule. Those possessing such lesions were rinsed in distilled water, and cylindrical segments of the affected areas were removed. Some of the segments were fixed in buffered formalin before freeze-drying; others were freeze-dried immediately. Initially, specimens were quenched in liquid freon followed by immersion in liquid nitrogen. They were then placed in ampuoles in a freezer at −45C and sublimated by vacuum until dry. After the specimens appeared dry, the freezer was allowed to come to room temperature slowly while the vacuum was maintained. The dried specimens were attached to metal pegs with conductive silver paint and placed in a vacuum evaporator on a rotating tilting stage. They were then coated by evaporating an alloy of 20% palladium and 80% gold to a thickness of approximately 300 A°. The specimens were examined by secondary electron emmission in a scanning electron microscope.

Video real-time imaging of artificial membranes during freeze-drying by cryo-electron microscopy

1988 ◽  
Vol 46 ◽  
pp. 16-17
Author(s):  
Alan S. Rudolph ◽  
Ronald R. Price
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Freeze Drying ◽  
Video Capture ◽  
Drying Process ◽  
Artificial Membranes ◽  
The Past ◽  
Cryo Electron Microscopy ◽  
Spherical Structures ◽  
Capture Techniques

We have employed cryoelectron microscopy to visualize events that occur during the freeze-drying of artificial membranes by employing real time video capture techniques. Artificial membranes or liposomes which are spherical structures within internal aqueous space are stabilized by water which provides the driving force for spontaneous self-assembly of these structures. Previous assays of damage to these structures which are induced by freeze drying reveal that the two principal deleterious events that occur are 1) fusion of liposomes and 2) leakage of contents trapped within the liposome [1]. In the past the only way to access these events was to examine the liposomes following the dehydration event. This technique allows the event to be monitored in real time as the liposomes destabilize and as water is sublimed at cryo temperatures in the vacuum of the microscope. The method by which liposomes are compromised by freeze-drying are largely unknown. This technique has shown that cryo-protectants such as glycerol and carbohydrates are able to maintain liposomal structure throughout the drying process.

Sign in / Sign up

Export Citation Format

Share Document