Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract A novel phosphorus‐containing poly (ethylene terephthalate) (PET) copolyester/nano‐SiO 2 composite (PET‐ co ‐DDP/SiO 2 ) was synthesized by in situ polycondensation of terephthalic acid (TPA), ethylene glycol (EG), [(6‐oxide‐6H‐dibenz[c,e] [1,2]oxaphosphorin‐6‐yl)‐methyl]‐butanedioic acid (DDP), and nano‐SiO…
Abstract Hydrogen degradation represents a problem of major technological concern in the structural integrity of prestressed concrete structures in which cold-drawn wires are the main structural component and can suffer the deleterious effect of hydrogen, with the subsequent risk of catastrophic failure. This paper pr…
Abstract Ricinus communis (RC) oil‐based materials are currently receiving increasing attention because of economic and environmental concerns. In the present work, RC oil—a natural triol has been utilized for the development of an advanced polymeric material—poly(urethane‐ricinoleamide) (PUR) through very simple synt…
We present a method to determine the effective parameters of a periodic structure with small spacing. This technique is analogous to the averaged boundary condition method applied to planar periodic structures. The effective permittivity of a structure from parallel wires with dielectric and magnetic coating was obtai…
A flexibly cross-linked shape memory polyurethane (SMPU) was converted to a magnetic polymer by making a composite with a ferromagnetic particle (Fe 3 O 4 ). The flexibly cross-linked SMPU has already displayed excellent mechanical and shape memory properties; the design of a magnetically responsive material allowed f…
On-line control and optimization can improve the efficiency of fuel cell systems, whilst simultaneously ensuring that the operation remains within a safe region. Also, fuel cells are subject to frequent variations in their power demand. This paper investigates the real-time optimization (RTO) of a solid oxide fuel cel…
By modeling β-Zn4Sb3 material as a Zn36Sb30 crystal with defects, the crystal structure and thermal properties of β-Zn4Sb3 are studied by ab initio method to explain its extremely low thermal conductivity at moderate temperature. The formation and migration energies of defects are calculated and used to explain the pa…
Transient absorption of gold nanoparticle (NP) arrays covered by a 60 nm thick film of VO2 was measured using a mechanically shuttered 785 nm pump laser and a 1550 nm cw probe. Even though the Au NPs constitute only 4% by volume of the nanocomposite, they increase the effective absorption coefficient by a factor of 1.…
The discovery of the giant magnetocaloric effect with isothermal field-induced entropy change beyond the spin-multiplicity limit gave rise to some indistinctness in the literature regarding the applicability of fundamental thermodynamics in data analysis. Those misleading interpretations concerning, for instance, the…
The photocontrollable J-aggregation of a diarylethene-phthalocyanine hybrid (T-ZnPc) and its aggregation-stabilized photochromic behavior were investigated by various techniques. T-ZnPc initially exhibited slight J-aggregation tendency in solvents such as chloroform and toluene through conformational planarization eff…
Abstract Scaffolds of a biodegradable poly(ester amide) constituted of L ‐alanine, sebacic acid, and 1,12‐dodecanediol units (abbreviated as PADAS) were prepared by the compression‐molding/particulate‐leaching method. The influence of the type, size, and percentage of salt on the scaffold porosity and morphology was e…
Static dielectric permittivity measurements on a binary system of 4-cyanophenyl [4' (4''- n -heptylphenyl)] benzoate (referred to as 7CPB) + 4-cyanophenyl 4-nonylbenzoate (referred to as 9.CN) showing both induced smectic A d and re-entrant nematic phases in a certain concentration range (0.4< x 9.CN <0.87) are being…
A solid oxide fuel cell (SOFC) unit is constructed with Ni-YSZ as the anode, YSZ as the electrolyte, and La(0.6)Sr(0.4)CoO(3)-Ce(0.9)Gd(0.1)O(1.95) as the cathode. The SOFC operation is performed at 600 °C with a cathode gas simulating the lean-burn engine exhaust and at various fixed voltage, at open-circuit voltage,…
Polyethylene (PE) nanocomposite samples were prepared with Cloisite 25 A, 30B, and 93 A and Nanofil 5 and 3000 nanofillers. The amount of modified Na + montmorillonite (MMT Na + ) was fixed to 5 wt%. For the compounding of PE matrix and nanofillers, two different compounding equipments were used, KO Kneader Buss and A…
Deformation twinning of B2 austenitic phase in NiTi has not been understood despite its significance. A number of experimental observations have been made, but these alone cannot explain the complex shears and shuffles that produce the twin. We propose that twinning can occur via (2¯11)[1¯1¯1¯] shear and the proposed…
Centimeter size crystals of the second-order nonlinear optical and polar oxide Na 2 TeW 2 O 9 (NTW) have been grown by the top-seeded solution growth method. The specific heat, anisotropic thermal expansion, and thermal diffusivity have been measured. In addition, the average principal thermal expansion coefficients h…
A mesoporous silica film (MSF, 20 × 20 mm in size) with 3D accessible mesopores ( Fmmm symmetry) was synthesized on a current collector substrate, and then the entire pore surface was coated with an extremely thin carbon layer. The resulting carbon-coated mesoporous silica film (C/MSF), which well retains the continuo…
Abstract The crack behavior and spherulitic morphology in melt‐crystallized poly( L ‐lactic acid) (PLLA) were found to be molecular weight (MW) and crystallinity dependent, along with other key factors. With increasing MW in PLLA, the size of spherulites, band spacing of ring‐banded spherulites, and degree of crystall…
A metastable polymorph of vanadium sesquioxide was prepared by the reaction of vanadium trifluoride with a water-saturated gaseous mixture of 10 vol % hydrogen in argon. The new polymorph crystallizes in the bixbyite-type structure. At temperatures around 823 K a transformation to the well-known corundum-type phase is…
Normal alkanes display multiple ordered phases, including an orthorhombic crystal (X) and two partially ordered rotator phases (RI and RII). The rotator phase transitions X-RI and RI-RII are of interest because they are weakly first-order, and because experiments suggest that crystalline polyethylene may nucleate via…