Using 5-sulfoisophthalic acid as the ligand, tin porous coordination polymer (SnPCP) was synthesized on polydopamine-coated MnO2 (MnO2–PDA). The novel composite SnPCP@MnO2–PDA used for conversion of glucose into 5-hydroxymethylfurfural (HMF). tetrahedral-coordinated and sulfonic groups ligand catalyze isomerization to fructose dehydration HMF, respectively. Thus, is a bifunctional catalyst. structure SnPCP facilitates transport glucose, intermediate, HMF within In addition, MnO2–PDA found be...

A submerged floating tunnel (SFT) is considered an innovative alternative to conventional bridges and underground or immersed tunnels for passing through deep water. Assessment of hydrodynamic performance SFT under regular wave loading one the important factors in design structure. In this paper, a theoretical model developed describe coupled dynamic response mooring lines waves. model, wave-induced loads are estimated by Morison equation moving object, simplified governing differential with...

ABSTRACT Epoxidized castor oil‐based diglycidyl‐phthalate (ECODP) was synthesized and incorporated into poly(vinyl chloride) (PVC) for the first time. The chemical structure of ECODP confirmed. plasticizing effects as a replacement commercial plasticizer dioctyl phthalate (DOP) were investigated. thermal stability mechanical properties PVC films before after aging investigated using thermogravimetric analysis (TGA), TGA‐FTIR analysis, dynamic (DMA), tensile tests. results indicated that...

As the most favored high-quality biopolymer, silk fiber is widely used in textile and medical industries owing to its impressive mechanical properties, wear comfort biocompatibility. However, photoinstability, chemical instability, thermal instability seriously hinder utilization luxurious fashionable apparels. Therefore, we herein report preparation of an ultrathin uniform TiO2-Al2O3 cloth with a thickness just six thousand on silkworm via atomic layer deposition. In this composite cloth,...

ABSTRACT Brine shrimp are an ideal bait for zebrafish with high protein content. In laboratory settings, brine eggs (BSEs) commonly used to hatch acquiring shrimp. However, not all BSEs able successfully into Actually, some unhatched (UBSEs) retain and collected along the as bait. The digestibility of UBSEs their potential impact on digestive system have been demonstrated. this study, high‐resolution synchrotron radiation phase‐contrast CT (PCCT) was show internal structures UBSEs....

Using tung oil as raw material, DOPO and carboxylate bonds were introduced to obtain a chemically degradable epoxy resin with excellent performance.

This study investigated the impact of ice temperature storage on quality and bacterial composition processed fish paste products (PFP). Freezing curve revealed was -1 °C. Electric nose (e-nose) showed significant changes in volatile components within 8 days. Results total basic nitrogen (TVB-N) that PFP stored at 4 °C reached its limit after 2 days, whereas remained stable for 6 Thiobarbituric acid reactive substances (TBARS) demonstrated delayed oxidation compared to TCA-soluble peptides...

ABSTRACT Six kinds of polyimide (PI) fibers with different molecular rigidity and hydrogen bond interactions were designed prepared in order to investigate the relationship between structure mechanical properties. The rigidity, aggregation structure, fracture morphology, bond, charge transfer (CT) investigated detail. Conformational six PI simulated measured by D ‐values energy barrier bottom potential curves units. Rigid rod‐like macromolecules tend pack show better However, increase...

ABSTRACT The copolymerization modified poly(p‐phenylene terephthalamide) containing 2‐(4‐aminophenyl)−5‐aminobenzimidazole (PABZ) units in the main chain was synthesized and corresponding poly‐p‐phenylene‐benzimidazole‐terephthalamide (PBIA) fibers were prepared by wet spinning. HCl, by‐product released during polymerization, can complex with PABZ to prevent formation of hydrogen bonding between units, resulting amorphous PBIA a lower glass transition temperature ( T g ). Therefore, for...

ABSTRACT Novel high‐performance copolyimide (co‐PI) fibers containing benzimidazole and benzoxazole ring in the main chain were prepared by a two‐step spinning via poly(amic acid)s. Effects of incorporated units on micro‐structure properties co‐PI investigated. Fourier transform infrared (FTIR) results indicated that hydrogen bonding is formed fibers. The exhibited discernible crystallization peaks at 14°∼15° 23°∼26° (2θ), showing crystalline‐like structure. Moreover, packing type...

In this study, KMnO4 was applied as an etchant to partially decompose the silica microspheres into mesoporous structures. 1H,1H,2H,2H-perfluorodecyltriethoxysilane grafted onto surface of hollow silica. A fluorinated silica/polyimide hybrid material prepared. Meanwhile, influence on dielectric property and moisture absorption discussed. It is found that can lower constant hygroscopicity film. The characterized by strong hydrophobicity, good dispersibility, thermal stability. Even at a very...

Abstract Background Accurate noise power spectra (NPS) measurement in clinical X‐ray CT exams is challenging due to the need for repeated scans, which expose patients high radiation risks. A reliable method single acquisition NPS estimation thus highly desirable. Purpose To develop a estimating local from photon counting detector‐CT (PCD‐CT) acquisition. Methods novel nearly statistical bias‐free estimator was constructed raw counts data of PCD‐CT scan estimate variance sinogram projection...

Abstract A low dielectric polyimide/polyimide microsphere (PI/PM) composite film was constructed by thermal imidization of polyamic acid from pyromellitic dianhydride (PMDA) and 4,4′‐oxydianiline (ODA) in the presence porous PM. The PM particles with particle size about 2 μm were prepared via solvothermal method using 3,3′,4,4′‐benzophenonetetracarboxylic (BTDA) ODA as monomers through imidization. Due to favorable compatibility between PI matrix, mechanical properties, stability, properties...