Progress on RE2O3-Mo/W matrix secondary emitter materials

Wang, Jin-shu; Dong, Liran; Liu, Wei; Yang, Fan; Chen, Shuqun

doi:10.1007/s11431-017-9040-7

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…To balance the optical transmittance and thermal dimensional stability, a certain proportion of rigid structural units should be added as well 17 . To achieve a low CTE, much research has been done to increase the rigidity of the main chain or strengthen the inter‐chain interactions, such as adding inorganic nanoparticles filler with low CTE, in situ polymerization to build hydrogen‐bond network, and designing of more rigid/liner molecular structure 18–21 . In various rigid structures, the amide and benzanilide linkage and cyclobutane‐1,2,3,4‐tetracarboxylic dianhydride(CBDA) are commonly used 22–24 …”

Section: Introductionmentioning

confidence: 99%

Synthesis of colorless polyimides derived from benzimidazole diamines with bis‐amide structures

Zhang,

Guo,

et al. 2024

Journal of Polymer Science

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To make the colorless polyimides (CPIs) suitable for the application of flexible display technology, the polyimide (PI) films need to have both good optical properties and thermal properties. To get the wanted properties, 2‐(2‐methyl‐4‐(2‐methyl‐4‐aminobenzamido)phenyl)‐5‐(2‐methyl‐4‐aminobenzamido)‐N‐phenylbenzimidazol (5a) and 2‐(2‐methyl‐4‐(2‐trifluoromethyl‐4‐aminobenzamido)phenyl)‐5‐(2‐trifluoromethyl‐4‐aminobenzamido)‐N‐phenylbenzimidazol (5b) were synthesized, which both contained benzimidazole and bis‐amide structures. Two kinds of PI films were polymerized with cyclobutane‐1,2,3,4‐tetracarboxylic dianhydride (CBDA). With the contribution of side groups (CH3 or CF3), the resulting PI films presented relatively superior optical properties (transmittance at 400 nm was 59% and 68% respectively) and low coefficient of thermal expansion (CTE = 22 and 25 ppm K−1). These good properties suggest that these PI films have the potential for flexible display usage.

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Section: Introductionmentioning

confidence: 99%

Synthesis of colorless polyimides derived from benzimidazole diamines with bis‐amide structures

Zhang,

Guo,

et al. 2024

Journal of Polymer Science

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“…[24][25][26][27] Actually, making high strength hydrogels is not a tough work in nowadays' technologies. In recent 10 years, many high strength hydrogels with novel network microstructures have been developed, including nanocomposite hydrogels, [28][29][30][31] hydrophobically associated hydrogels, [32][33][34] ionically crosslinked hydrogels, 35,36 hydrogen bonding or dipole-dipole enhanced hydrogels, [37][38][39] macromolecular microparticle composite hydrogels, 40 tetra-PEG gels, 41 and double network hydrogels (DN gels). [42][43][44][45] Among them, double network hydrogels, consisting of two strong asymmetric polymer networks, demonstrate extremely high strength and toughness.…”

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confidence: 99%

Double network hydrogels with controlled shape deformation: A mini review

Yang

Zhu

et al. 2018

J Polym Sci B Polym Phys

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Double network hydrogels (DN gels), consisting of two networks with strongly asymmetric network structures and properties, are one of most investigated high strength hydrogels. In most cases, the first network of DN gels is rigid, brittle and tightly crosslinked, while the second network is soft, ductile and loosely crosslinked. Because of the tunable and diverse network structures, DN gels with controlled shape deformation have attracted great attention in recent years. The shape deformation of DN gels can be controlled by first network, second network, or both networks. In this mini review, the shape deformation of DN gels via different networks will be summarized, and the application and future perspectives also are discussed. REVIEW usually soft, ductile, and loosely crosslinked which acts as "hidden length" to protect the integrity of DN gel after the first network fractured. Generally, the molar concentration of second network is 20-30 times higher than that of first network, and the two networks are strongly entangled with each other. The first network is also stiffer and more brittle than second network. "Stiffer" means the first network has higher elastic modulus than second network, while "more brittle" means the first network is often fracture earlier than second network. In this way, the first network bears stress firstly and is fractured to dissipate energy. Gong and co-workers 42 developed a two-step sequential free-radical polymerization method to synthesize the first fully chemically crosslinked poly(2-acrylamido-2methylpropanesulfonic acid)/polyacrylamide (PAMPS/PAAm) DN hydrogels (named as chemical DN gels, i.e., both first and second network were crosslinked by covalent bonds), which can achieve fracture toughness of 10 2 -10 3 J m −2 , fracture tensile stress of 1-10 MPa, and fracture tensile strain of 1000-2000%. Since then, various chemical DN gels have been prepared, including microgel-reinforced gels, 48 "molecular stent" DN gels, 49 void-DN gels, 50 inverse DN gels, 51 and nanocomposite DN (NC-DN) gels. 52-56 However, chemical DN gels often suffer from severe softening phenomenon and are lack of fatigue resistance. If one of the networks is crosslinked by physical interactions (such as ionic interactions, hydrogen bonds, hydrophobic associations, coordination interactions, etc.), while the other network is covalently crosslinked, the DN gels are named hybrid DN gels. If both the networks are crosslinked by physical interactions, the DN gels are called fully physical DN gels (i.e., physical DN gels). In recent years, hybrid DN gels and physical DN gels have been successfully developed. Representatively, Suo et al. 57 reported Ca 2+ -alginate/polyacrylamide (Caalginate/PAAm) hybrid gels, which exhibited extremely high toughness of 10 4 J/m 2 . Our group also developed a robust

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Yttrium Doped Single-Crystalline Orthorhombic Molybdenum Oxide Micro-Belts: Synthesis, Structural, Optical and Photocatalytic Properties

Al–Otaibi

2021

J Inorg Organomet Polym

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Progress on RE2O3-Mo/W matrix secondary emitter materials

Cited by 5 publications

References 25 publications

Synthesis of colorless polyimides derived from benzimidazole diamines with bis‐amide structures

Synthesis of colorless polyimides derived from benzimidazole diamines with bis‐amide structures

Double network hydrogels with controlled shape deformation: A mini review

Yttrium Doped Single-Crystalline Orthorhombic Molybdenum Oxide Micro-Belts: Synthesis, Structural, Optical and Photocatalytic Properties

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