MATERIALS LETTERS
·
2024
·
IF 2.7
Yihan Cui,Huijie Feng,Xiaoqiao Xie
A new family of versatile water-enhanced adhesives based on hydrophobic polymers and amphiphilic alkanoic acids has been developed. These polymer gels form responsive surface bonding upon water exposure through softening effect and/or autonomous rearrangement of alkanoic acid molecules at the interface, thereby enhancing adhesion on both hydrophilic and hydrophobic, smooth and rough surfaces under wet conditions.
研究领域:
材料科学
·
化学工程
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
Smart Materials and Structures
·
2022
·Vol. 31
·期 11
·115012
·
IF 4.131
Qingyu Meng,Wenjing Jin,Zhuo Zhang,Minghao Zhang,Xiaoping Shen,Zhu Zhou,Qingfeng Sun
Because of their good flexibility and capacity to capture the dynamic mechanical energy by converting it into electrical signals, polymeric piezoelectric nanogenerators (PENGs) have broad application prospects in mechanical vibration detection and acquisition as sensors and self-powered systems. Here, a flexible PENG film based on hydroxypropyl cellulose (HPC) as the matrix, polyvinylidene fluoride (PVDF) as an auxiliary electrospinning reagent and BaTiO3 nanoparticles (NPs) as a piezoelectric nanofiller is constructed by electrospinning and post-treatments for macromolecule rearrangement and thus piezoelectricity enhancement. This PENG demonstrates a superior sensitivity (23.33 mV kPa−1) which is over 3.9 times those of the commercial PVDF and polyvinylidene fluoride-trifluoroethylene films. This performance enhancement is ascribed to the HPC dissolution and regeneration during post-treatments, resulting in the formation of outer wrappers around fibrils and thus an interconnected fibrous network with junction nodes between adjacent fibers for stress transfer efficiency. The partial crystal phase transformation of PVDF during film densification may also play a role in the increase of piezoelectricity. A series of practical application scenarios are established to demonstrate the highly promising potential of this fibril-based composite membrane for multifunctional force sensing and energy collection.
研究领域:
材料科学
·
物理学
·
纳米技术
✓ 已验证
DOI
高影响因子
TETRAHEDRON
·
2013
·
IF 2.803
Run-Lin Li,Gong-Qing Liu,Wei Li,Yu-Mei Wang,Lin Li,Lili Duan,Yue-Ming Li
3-Chloropiperidine compounds were obtained via Cu(II)-promoted one-pot intramolecular chloroamination of N -benzyl-4-penten-1-amines and subsequent rearrangement. The reaction conditions leading to this skeleton were studied, and the structure of the product was confirmed by NMR as well as X-ray diffraction experiments.
研究领域:
有机化学
·
药物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Binbin Zhou,Jing Zhong,Xinxue Tang,Jia-hua Liu,Junda Shen,Chong Wang,Weihui Ou,Hao Wang,Lu Liu,Jie Pan,Jian Lu,Yang Yang Li
Understanding the molecular orientation is crucial for revealing the mechanism of chemical reactions. However, how to accurately monitor the molecular orientation remains a great challenge because of the motion of the molecules during the chemical reaction. Here, surface-enhanced Raman spectroscopy (SERS) was used to monitor the molecular reorientation from the plasmon-catalyzed conversion of p-aminothiophenol (PATP) to p,p'-dimercaptoazobenzene (DMAB). Spectral change due to molecular reorientation, which is often overlooked, is clearly extracted through the protonation of the PATP molecules to suppress the conversion of PATP to DMAB. Meanwhile, by monitoring the Raman features, the reaction process and molecular reorientation are simultaneously recorded, offering fresh insights on the long-standing puzzle that why the conversion to DMAB is suppressed with concentrated PATP: this is because the over-crowded PATP adsorbed on the substrate hampered its own space-taking reorientation (similar to the space-steric effect) which is a prerequisite for producing DMAB.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Shiyi Wang,Yingzi Zhang,Yuxin Yan,Xuehua Dong,Liling Cao,Ling Huang,Guohong Zou
Birefringent crystals are essential in laser modulation, optical communication, and imaging systems. This paper reports two tellurium-based hybrid birefringent crystals─(C12H9N2)2TeBr6·2H2O and (C12H9N2)2TeBr6─composed of Te4+-centered octahedral units and [C12H9N2]+ π-conjugated organic cations. The hydrate converts to the anhydrate via thermal dehydration, a process in which water removal eliminates steric hindrance, promoting a more ordered molecular arrangement. Optical measurements show significantly enhanced birefringence after dehydration. The value at 546 nm increases from 0.17 to 0.31, nearly doubling. These findings highlight the potential of such materials for advanced optical applications that require high birefringence.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
·
2019
·
IF 5.839
Lechuan Wang,Lisha Li,Nuo Xu,Weiqing Sun,Baomiao Ding,Wei Xu,Zhenshun Li
Lysozyme (Ly), as an important natural preservative, easily interacts with anionic polysaccharides in food , which results in low and unstable bacteriostatic activity. The interaction of carboxymethylcellulose (CMC) with Ly was used to investigate the mechanism of the bioactivity changes caused by Ly binding polysaccharides. The affinity of Ly or Ly-CMC complexes for a mixed monolayer liposome (Lip) as an in vitro biomembrane model was characterized by using dynamic light scattering, Fourier transform infrared spectroscopy , circular dichroism spectroscopy , fluorescence analysis and interface activity measurements. The results showed that the affinity between Ly and Lip mainly depended on hydrophobic and electrostatic forces. The electrostatic interaction in Ly-CMC weakened the Ly-Lip affinity and altered the spatial conformation of Ly molecules. Furthermore, CMC screened the active sites of Ly and neutralized the charge of Ly, which may reduce its bioactivity. The presence of CMC decreased the increase in surface pressure in the Lip-Ly interface, which means that Ly-CMC has a lower insertion capacity and ability to induce lipid molecule rearrangement than Ly alone, indicating an inferior bacteriostatic ability. Our work explains how the bacteriostatic mechanism of Ly is affected by food biopolymers.
研究领域:
食品科学
·
生物化学
·
生物物理学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）