Thermomechanical analysis of material behaviour
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Materials Literature
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A Composite Material
David Estrada knows firsthand how a good mentoring experience can change a student’s life. Estrada, the first in his family to attend college, initially foundered, so he left school and joined the Navy, where he developed an interest in engineering. After his service, Estrada went back to school, this time at Boise St…
Correlation-driven topological Fermi surface transition in FeSe
The electronic structure and phase stability of paramagnetic FeSe is computed by using a combination of ab initio methods for calculating band structure and dynamical mean-field theory. Our results reveal a topological change (Lifshitz transition) of the Fermi surface upon a moderate expansion of the lattice. The Lifs…
Dynamics of the Nematic-Isotropic sharp interface for the liquid crystal
In this paper, we derive the sharp interface model of the nematic-isotropic phase transition from the Landau-de Gennes theory by using the matched asymptotic expansion method. The model includes the evolution equation of the velocity and director field of the liquid crystal, the sharp interface and Young-Laplace jump…
Revestimento de isoladores elétricos utilizando borracha de silicone/alumina trihidratada/nanosílica.
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PENGARUH KONSENTRASI NAOH PADA PROSES ALKALISASITERHADAP SIFAT MEKANIK KOMPOSIT POLYPROPILEN SERATPANDAN SAMAK (PANDANUS ODORASSITISMUS)(Studi Kasus Konsentrasi NaOH Untreated, 2.5%, dan 5%)
Pada saat ini kebutuhan akan material sangat banyak, khususnya material \nyang memiliki sifat mekanik yang tinggi. Logam merupakan salah satu material \nyang sering digunakan, namun akhir–akhir ini bahan baku logam sudah mulai \nberkurang. Salah satu alternatif yang digunakan untuk mengganti material logam \nyaitu kom…
Bioinspired microvascular self-healing in polymers and composites
Inspired by fluid transport in biological systems, engineered vasculature in synthetic materials provides an effective pathway to self-healing and ultimately mechanical stasis. In polymers, autonomous release of reactive chemistries from ruptured vasculature offers distinct advantages over prior self-healing approache…
Synthesis of carolacton precursors
The Polyketide Carolacton is one of the secondary metabolites of the myxobacterium Sorangium cellulosum. It has been proven by Wagner-Döbler et al. that carolacton have high activity against biofilms of Streptococcus mutans the main cause of dental plaque. Therefore the total synthesis and hypothesis driven chemical m…
Dispersion d’une argile organo-modifiée dans une matrice polypropylène : rôle des paramètres d’extrusion
National audience
Production of Low-cost Polyesters by Microwaving Heating of Carboxylic Acids and Polyol Blends
Numerous issues such as price uncertainty, manufacturing costs, environmental disposal, and geo-political issues affect the petroleum-based polymer industry. As an alternative, interest in the development of bio-degradable non-petroleum-based polymers has risen steadily since the 1980s. However, the price of tradition…
Chemical Synthesis of Carbonates, Esters, and Acetals from Soybean Oil
Vegetable oil is a convenient material for the production of agricultural products. Unfortunately, it does have drawbacks for some applications, an example being insufficient oxidative stability. Using chemistry, these problems can be solved. For example the epoxidized product formed from methyl oleate, oxidizes at a…
Towards the Development of a Universal Expression for the Configurational Entropy of Mixing
Several decades ago, the development of analytical expressions for the configurational entropy of mixing was an active field of research. Empirical or theoretical expressions and methods were deduced in each field of the condensed matter. Several examples can be found in the literature, as: i) the expressions of Flory…
Lubricity Characteristics of Seed Oils Modified by Acylation
Seed oils chemically modified via acylation of their epoxidized and polyhydroxylated derivatives, were investigated for their potential as candidates for lubrication. The native oil was preliminarily epoxidized and ring opened in a one-pot reaction using formic acid/H2O2 followed by aqueous HCl treatment to give the p…
Cell-Fiber Interactions: A New Route to Mechano-Biological Investigations in Developmental and Disease Biology
Cells in the body interact with a predominantly fibrous microenvironment and constantly adapt to changes in their neighboring physiochemical environment, which has implications in developmental and disease biology. A myriad of in vitro platforms including 2D flat and 3D gel substrates with and without anisotropy have…
磁性纳米Zn x Co 1- x Fe 2 O 4 空心微球的制备*
用超声溶剂热法制备了磁性纳米ZnxCo1-xFe2O4空心微球,采用X射线衍射仪(XRD)和透射电子显微镜(TEM)对其结构和形貌进行了表征。结果表明,所制备的ZnxCo1-xFe2O4空心微球均为标准的立方结构,说明锌的掺杂并不影响产物的晶型,但对产物的粒径影响较大。所制备的CoFe2O4空心微球的平均粒径为50 nm左右,但Zn0.5Co0.5Fe2O4空心微球的平均粒径为200 nm左右;用振动样品磁强计(VSM)以及网络矢量分析仪测试了微球的磁性能和吸波性能,结果显示,微球的饱和磁化强度随锌含量的增加先略微增大后减小,而矫顽力随锌含量的增加单调递减。当x=0.3时微球的磁性和吸波性能都为最佳。
LiODFB基电解液与高电压正极材料LiNi 0.5 Mn 1.5 O 4 的相容性
研究了草酸二氟硼酸锂(LiODFB)基电解液与锂离子电池高电压正极材料锰酸镍锂(LiNi0.5Mn1.5O4)的相容性,结果表明:在25℃和60℃,以LiODFB和六氟磷酸锂(LiPF6)为电解液的LiNi0.5Mn1.5O4/Li电池的CV曲线都具有单一的氧化还原峰,电池的可逆性优良,且LiODFB电池的循环性能优于LiPF6电池。在25℃,LiODFB电池和LiPF6电池以0.5C倍率首次充放电比容量分别为126.3 mAh·g-1、131.6 mAh·g-1,经100次循环后容量保持率分别为97.1%、94.7%;在60℃,LiODFB电池和LiPF6电池以0.5C倍率首次充放电比容量分别为132.6 mAh·g-1、129…
H-Bonded Polymerisation of Alternate Δ and Λ Metallohelicates
The neutral cadmium(II) complex Cd(HL)2 (H2L = 2-[(1H-imidazol-2-yl)methyleneamino]phenol) is chiral and it can be considered as a simple metallohelicate, with its corresponding Δ and Λ enantiomers. In the solid state, its helixes are hierarchically assembled as a linear polymer, via mutual N-H···O interactions betwee…
Green Synthesis of BaCrO4 Nanoparticles Using Glycyrrhiza Glabra Extract
The 'greener' environmentally friendly processes in chemistry and chemical technology are becoming increasingly popular and are much needed as a result of worldwide problems associated with environmental contamination. The biosynthesis of nanoparticles has been proposed as a cost effective and environmental friendly a…
Comparison of Minimal Inhibitory Concentration of Porphyrin Compounds Against Bacillus Subtilis Under Irradiation With Visible Light
In this study, the effect of meso-tetrakis (N-methyl-3-pyridyl)porphyrin (TMPyP(3)), meso-tetrakis (4-N, N, N-trimethylanilinium) porphyrin (TAPP) and their zinc compounds irradiated with visible light, on a Gram positive bacterium, Bacillus subtilis, was investigated and compared. MIC, MBC and inhibition zones produc…
Front Matter: Volume 9252
This PDF file contains the front matter associated with SPIE Proceedings Volume 9252, including the Title Page, Copyright information, Table of Contents, Invited Panel Discussion, and Conference Committee listing.