Direct Melt Intercalation of Polylactide Chains into Nano-Galleries: Interlayer Expansion and Nano-Composite Structure

2006 ◽  
Vol 27 (10) ◽  
pp. 751-757 ◽  
Author(s):  
Osamu Yoshida ◽  
Masami Okamoto
Keyword(s):  
Composite Structure ◽  
Nano Composite ◽  
Melt Intercalation

scholarly journals The Analysis of Resistance to Brittle Cracking of Tungsten Doped TiB2 Coatings Obtained by Magnetron Sputtering

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 807
Author(s):  
Jerzy Smolik ◽  
Joanna Kacprzyńska-Gołacka ◽  
Sylwia Sowa ◽  
Artur Piasek
Keyword(s):  
Fracture Toughness ◽  
Magnetron Sputtering ◽  
Composite Structure ◽  
Columnar Structure ◽  
Mode I ◽  
Nano Composite ◽  
Tungsten Concentration ◽  
Tib2 Coating ◽  
Crack Length Measurement

In this work, the authors present the possibility of characterization of the fracture toughness in mode I (KIC) for TiB2 and TiB2 coatings doped with different concentration of W (3%, 6% and 10%). The Young’s modulus, hardness and fracture toughness of this coatings are extracted from nanoindentation experiments. The fracture toughness was evaluated using calculation of crack length measurement. An important observation is that increasing tungsten concentration in the range 0–10% changes the microstructure of the investigated coatings: from columnar structure for TiB2 coating to nano-composite structure for Ti-B-W (10%) coating. It can be concluded that doping with concentration 10 at.% W causes an increase of the fracture toughness for the tested coatings.

Preparation and Electroluminescence Properties of CsPbI3/ZnO/GaN Nano-composite Structure

2021 ◽  
Vol 42 (11) ◽  
pp. 1748-1755
Author(s):  
Xiao-yu ZHOU ◽  
◽  
Jing ZHANG ◽  
Feng-zhou ZHAO ◽  
Xin-bo CHU ◽  
...  
Keyword(s):  
Composite Structure ◽  
Nano Composite

scholarly journals Synthesize Cellulosic Nano-Composite Structure from Trash Papers and its use for heavy metal removal from Aqueous Media

2021 ◽  
Vol 7 (3) ◽  
pp. 138-145
Author(s):  
Parvin Asadifard ◽  
Abbasali Zamani ◽  
Farideh Piri ◽  
Somayyeh Piri ◽  
◽  
...  
Keyword(s):  
Heavy Metal ◽  
Composite Structure ◽  
Metal Removal ◽  
Aqueous Media ◽  
Heavy Metal Removal ◽  
Nano Composite

scholarly journals Facile Construction of Superhydrophobic Surfaces by Coating Fluoroalkylsilane/Silica Composite on a Modified Hierarchical Structure of Wood

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 813 ◽  
Author(s):  
Jiajie Wang ◽  
Yingzhuo Lu ◽  
Qindan Chu ◽  
Chaoliang Ma ◽  
Lianrun Cai ◽  
...  
Keyword(s):  
Hierarchical Structure ◽  
Composite Structure ◽  
Superhydrophobic Surface ◽  
Superhydrophobic Surfaces ◽  
Commercial Application ◽  
Self Healing ◽  
Nano Composite ◽  
Mildew Resistance ◽  
Silica Composite ◽  
Inorganic Matter

Constructing superhydrophobic surfaces by simple and low-cost methods remains a challenge in achieving the large-scale commercial application of superhydrophobic materials. Herein, a facile two-step process is presented to produce a self-healing superhydrophobic surface on wood to improve water and mildew resistance. In this process, the natural hierarchical structure of wood is firstly modified by sanding with sandpaper to obtain an appropriate micro/nano composite structure on the surface, then a fluoroalkylsilane/silica composite suspension is cast and dried on the wood surface to produce the superhydrophobic surface. Due to the full use of the natural hierarchical structure of wood, the whole process does not need complicated equipment or complex procedures to construct the micro/nano composite structure. Moreover, only a very low content of inorganic matter is needed to achieve superhydrophobicity. Encouragingly, the as-obtained superhydrophobic surface exhibits good resistance to abrasion. The superhydrophobicity can still be maintained after 45 abrasion cycles under the pressure of 3.5 KPa and this surface can spontaneously recover its superhydrophobicity at room temperature by self-healing upon damage. Moreover, its self-healing ability can be restored by spraying or casting the fluoroalkylsilane/silica composite suspension onto this surface to replenish the depleted healing agents. When used for wood protection, this superhydrophobic surface greatly improves the water and mildew resistance of wood, thereby prolonging the service life of wood-based materials.

scholarly journals Defect Filling Method of Sensor Encapsulation Based on Micro-Nano Composite Structure with Parylene Coating

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1107
Author(s):  
Jialin Yao ◽  
Wenjiang Qiang ◽  
Xingqi Guo ◽  
Hanshui Fan ◽  
Yushuang Zheng ◽  
...  
Keyword(s):  
Composite Structure ◽  
Diffusion Mechanism ◽  
Atomic Layer ◽  
Organic Polymer ◽  
Water Molecules ◽  
Al2o3 Nanoparticles ◽  
Sensors And Actuators ◽  
Nano Composite ◽  
Filling Method ◽  
Defect Filling

The demand for waterproofing of polymer (parylene) coating encapsulation has increased in a wide variety of applications, especially in the waterproof protection of electronic devices. However, parylene coatings often produce pinholes and cracks, which will reduce the waterproof effect as a protective barrier. This characteristic has a more significant influence on sensors and actuators with movable parts. Thus, a defect filling method of micro-nano composite structure is proposed to improve the waterproof ability of parylene coatings. The defect filling method is composed of a nano layer of Al2O3 molecules and a micro layer of parylene polymer. Based on the diffusion mechanism of water molecules in the polymer membrane, defects on the surface of polymer encapsulation will be filled and decomposed into smaller areas by Al2O3 nanoparticles to delay or hinder the penetration of water molecules. Accordingly, the dense Al2O3 nanoparticles are utilized to fill and repair the surface of the organic polymer by low-rate atomic layer deposition. This paper takes the pressure sensor as an example to carry out the corresponding research. Experimental results show that the proposed method is very effective and the encapsulated sensors work properly in a saline solution after a period of time equivalent to 153.9 days in body temperature, maintaining their accuracy and precision of 2 mmHg. Moreover, the sensors could improve accuracy by about 43% after the proposed encapsulation. Therefore, the water molecule anti-permeability encapsulation would have broad application prospects in micro/nano-device protection.

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