Lei Xiao,Xinfei Wang,Tianfu Zhang,Xiaojun Feng,Kun Zhang,Junqing Yang,Xiaoming Jin,Gazi Hao,Wei Jiang
In order to achieve new energetic materials with high energy, low sensitivity, and moisture-proof properties, dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate (TKX-50)/ammonium perchlorate (AP) cocrystal (molar ratio 1:1) was successfully prepared through a spray-assisted solvent–nonsolvent method. SEM shows that the morphology of the cocrystal is different from those of the two raw materials. XRD and FT-IR spectra indicate the formation of the cocrystal. The apparent activation energy of the cocrystal is lower than that of raw TKX-50. The characteristic drop height (H50) is higher than that of TKX-50, while the friction sensitivity (P) of the cocrystal is lower. In addition, the moisture-proof property of the cocrystal is improved, showing good application potential.
A facile two-dimensional Pb-based metal-organic framework in hexagon sheet structure is developed, and an oriented haloing effect of framework is further demonstrated when it is composited with organic Spiro-OMeTAD layer based on experimental and model analysis. With the haloing effect, the composited layer shows the smoother surface, higher hydrophobicity and upshifted energy levels and electrical interfaces, in comparison to a pure Spiro-OMeTAD layer. When the composite layer is used as hole transfer layer in perovskite solar cells , the cell reveals the higher power conversion efficiency and moisture-resistance feather. The average efficiency of cell with the composite layer is 13.17%, which is 25% larger than that with pure Spiro-OMeTAD layer, and the cell can remain 54% efficiency of initial value even after 9 days in an environment of 30% relative humidity , in contrast, the efficiency of cell with pure Spiro-OMeTAD layer decays to 28% of initial value just after 7 days.
Ruojun Mu,Nitong Bu,Yi Yuan,Jie Pang,Chen Ma,Lin Wang
Constructing biodegradable food packaging with good mechanics, gas barrier and antibacterial properties to maintain food quality is still challenge. In this work, mussel-inspired bio-interface emerged as a tool for constructing functional multilayer films. Konjac glucomannan (KGM) and tragacanth gum (TG) with physical entangled network are introduced in the core layer. Cationic polypeptide ε-polylysine (ε-PLL) and chitosan (CS) producing cationic-π interaction with adjacent aromatic residues in tannic acid (TA) are introduced in the two-sided outer layer. The triple-layer film mimics the mussel adhesive bio-interface, where cationic residues in outer layers interact with negatively charged TG in the core layer. Furthermore, a series of physical tests showed excellent performance of triple-layer film with great mechanical properties (tensile strength (TS): 21.4 MPa, elongation at break (EAB): 7.9 %), UV-shielding (almost 0 % UV transmittance), thermal stability , water, and oxygen barrier (oxygen permeability (OP): 1.14 × 10 −3 g/m s Pa and water vapor permeability (WVP): 2.15 g mm/m 2 day kPa). In addition, the triple-layer film demonstrated advanced degradability, antimicrobial functions, and presented good moisture-proof performance for crackers, which can be potentially applied as dry food packaging.
危险品化学品经营许可证（带存储）