In this work, the one-pot preparation of quasi-alternating PEAs was achieved by introducing water to inhibit the esterification reaction during the amidation reaction stage and subsequently promoting the esterification reaction by removing water under vacuum. The synthesized PEAs are comparable to the PEAs synthesized by traditional method.
We prepared CPM films with excellent thermal stability and high porosity by electrospinning and cross-linking in sequence. Then CPM films were activated by immersing in electrolyte to prepare CGPEs with enhanced electrolyte uptake and high ionic conductivity.
In this manuscript, a series of new organoboron conjugated homopolymers based on double B←N bridged bipyridine (BNBP) unit are designed and synthesized. All these polymers exhibit deep-red emission (λmax 650 nm) with high fluorescence efficiency (ΦF > ca. 0.6) in solution. The polymers can be used as the emitters in solution processed OLEDs with decent device performance.
A novel polyimide-Cu complex material predicated on side-chain-type pyridine-Cu coordination achieves superior dielectric performance, which endows an elevated degree of freedom with suppressed relaxation activation energy and long-range electron delocalization, enhancing molecular dipole moment with more flexibility.
A novel polyimide-Cu complex material predicated on side-chain-type pyridine-Cu coordination achieves superior dielectric performance, which endows an elevated degree of freedom with suppressed relaxation activation energy and long-range electron delocalization, enhancing molecular dipole moment with more flexibility.
We develop a novel polyfullerene electron transporter called PFBCP, which achieves both efficient electron transport and hole blocking in a single layer. Our blade-coated perovskite solar cells utilizing PFBCP achieve a high power conversion efficiency exceeding 22% and retain 91% of initial efficiency after 1,200 hours of light soaking.
Glucose-sensitive membrane was prepared by grafting PBA-based contraction-type glucose-sensitive linear polymer on the membrane surface. When glucose concentration increases, the polymer chain shrinks and insulin release increases. Conversely, insulin release is reduced. The membrane has potential application in self-regulating insulin release.
With the rac-Et(Ind)2ZrCl2 catalyst, the efficient copolymerization of ethylene and 11-iodo-undecene was achieved, and the obtained copolymers were used as intermediates to prepare a series of polyethylene ionomers with different counterions. The resultant ionomers could be adjusted in terms of the stress-at-break (7.8−25.6 MPa) and the elongation-at-break (445−847%). Significantly, excellent antibacterial activities (> 99%) was demonstrated.
Concerted steric and electronic strategy in neutral Ni(II) catalysts enables the enhancement of thermostability in ethylene (co)polymerization, thus producing semicrystalline PE, PE wax, PE oil, and functional PE.
A bio-based thermotropic liquid crystal epoxy resin (THMT-EP) was used to modify petroleum-based epoxy resin (E51), which significantly improved the impact strength of the blended system, as well as the thermal stability, mechanical strength, and flame retardant properties. It addressed the dilemma of sacrificing other properties for toughened epoxy resin.
A series of quinolinyl-urea catalysts were synthesized and evaluated to be highly active in the ring-opening polymerization of δ-VL in combination with MTBD. Linear PVLs with narrow molecular weight distribution were obtained and the “living”/controllable characteristic of ROP was verified by the kinetic and chain extension experiments.
New polydiacetylene materials with specific melting behavior and thermochromic properties can be customized by precisely regulating the structure of diacetylene monomers.
Six poly(ester imide)s with varying molecular chain rigidity were synthesized by altering the arrangement of the ester bond on the aromatic ring while maintaining similar polarizations, with a focus on the correlation between chain morphology and dielectric properties.
A series of polyimide films with different flexible and rigid structures were prepared by low-temperature imidization method using the catalyst of imidazole, and the effect of chemical catalysis on film properties and aggregation structures was investigated. The chemically catalyzed imidization method promotes the degree of imidization reaction and induces the orientation of molecular chains, and the tensile strength and elongation at break of films are significantly improved.
A kind of injectable shear-thinning hydrogel for endoscopic submucosal dissection was developed, which has excellent shear-thinning and self-healing properties. And it can maintain more durable submucosal cushion height than normal saline. Integrated with good antibacterial activity, hemocompatibility and cytocompatibility, the hydrogel demonstrates a superiority in accelerating wound healing after operation.
A source of cold plasma, at atmospheric pressure, in helium, is used for the direct or indirect exposure of organic matter for subsequent interaction with living cells, which are studied using fluorescence or hyperspectral microscopy in order to investigate the after-plasma exposure biocompatibility of materials.
In this paper, PPTA nanoparticles were directly synthesized in HIPS matrix by in-situ polycondensation method, which not only solved the problems of easy agglomeration and difficult dispersion of nano PPTA in polymer matrix, but also significantly improved the mechanical properties of HIPS.
In this work, long chain branching (LCB) PGA was prepared by two-step functional group reaction method and the structure of LCB was fully characterized by rheology. It is clear that the melt strength of the modified PGA has been greatly improved.
In this study, composite particles (A-N) with both slow-release and reinforcing functions were obtained by loading the antioxidant into the pores of silica aerogel powders. Thermo-oxidative aging of vulcanized rubber was inhibited by continuous release of antioxidant from A-N.
A fluorine-functionalized 3D COF (3D-An-COF-F) with entangled 2D sql nets was designed and synthesized. Based on continuous rotation electron diffraction technique and structure modelling, 3D-An-COF-F was isostructural to our reported 3D-An-COF. Interestingly, compared to 3D-An-COF without F atoms, 3D-An-COF-F showed an improved CO2 sorption ability and higher CO2/N2 selectivity.
PVA/GO/h-BN Janus films are fabricated by a simple density deposition self-assembly method without assistance of interface or auxiliary equipment, which just utilize the density difference between GO and h-BN during water evaporation. The acquired Janus films show diverse applications, such as sensing & actuating, electronic skins, soft actuators, flexible sensors.
The reserved shish crystals can induce the formation and structural evolution of shish-kebab crystals for UHMWPE low-entangled films during the hot stretching. High-temperature stretching is more favorable for structural evolution of UHMWPE films with reserved shish crystals compared to low-temperature stretching.
The optimal heat-setting temperature for PP/HDPE bilayer separator is 130 ℃. At this temperature, the bilayer achieves maximum puncture strength, lowest Gueley value and ionic conductivity of 9.7 N, 369 s/100 ml and 2.35×10−3 S/cm, respectively. Heat setting at 130 °C enables the achievement of a high-safety composite separator with excellent performance.