A well-designed intracellular RNase A and DOX co-delivery system based on dynamic covalent bond was prepared with good stability and satisfied LC/EE under physiological conditions. This nanoplatform showed a synergistic and enhanced antic-cancer effect and may promote the development of anticancer combination therapy.
Light-responsive polyesters (PLTDs) based on bio-based L-glutamic acid were synthesized by Passerini Three-Component Polymerization with molar masses up to 8500 g/mol and yields exceeding 90%. Doxorubicin-loaded nanoparticles (size = 193 nm, PDI = 0.018) were successfully prepared and the light-controlled drug release kinetic was thoroughly characterized.
Fluorescent and multi-responsive polysiloxane (FRPS) is synthesized. FRPS is not only highly sensitive to temperature, pH and CO2 in water, but also showed an enhanced and stimuli-adjustable fluorescence emission. FRPS is used as physiological indicator for cell imaging, and for controlled release and trace detection of doxorubicin (DOX).
Hydrogen bonding-induced phase separation strategy to construct poly(vinylpyrrolidone)/poly(acrylamide) semi-IPN hydrogels. SAXS and CLSM to study the phase separation. The unique phase-separated structure endowed the semi-IPN hydrogels with excellent mechanical properties and impact damping performance.
In the Tb3+ complexes with the vinylamide copolymers of pmethacrylamidobenzoic acid, water molecules located in the vicinity of carbonyl groups C=O and strongly bound by hydrogen bonds are partially included in the coordination sphere of Tb3+. As a result, OH vibrations of the coordinated water molecules, which are the main process of luminescence quenching, are difficult. This leads to a significant increase in luminescence in compared with other copolymers.
By employing electron donor compounds as an innovative approach, the synthesis of low melting point syndiotactic 1,2-polybutadiene was successfully achieved utilizing an iron-based catalyst. This catalytic system exhibits remarkable advantages in terms of high activity and thermal stability, while simultaneously demonstrating the characteristics of a controlled/living polymerization process.
In this study, symmetrical α-diimine nickel precatalysts displayed high activity (typically 106 - 107 g mol-1 h−1) and robust thermal stability for synthesizing highly branched polyethylene. Mechanical analysis demonstrated excellent tensile strength and strain recovery, highlighting the superior material properties of the prepared thermoplastic polyethylene elastomers.
The ordered bicontinuous phase is rarely obtained in block copolymers because of the competition between the minimization of interfacial energy and packing frustration. Orientational interaction is regulated to compensate packing frustration for stabilizing ordered bicontinuous network structures.
A high-temperature resistant, thermally conductive glass fiber cloth reinforced polymer composite based on β-hydroxyester bonds crosslinked cycloaliphatic epoxy is developed. As a result of the topological network reshuffling and the accompanying physical recontact of BN fillers, restorations of mechanical, thermally conductive and electrical insulation properties are enabled after interlaminar damage.
The study introduces a method combining density functional theory and finite field method to estimate dielectric properties of polymers. It accurately predicts constants for polyethylene and polytetrafluoroethylene, and investigates the impact of conformation variations in polyvinylidene fluoride on its dielectric constant, providing insights for material design and advancing materials science.
This work demonstrates that octamethylenedicarboxylic dibenzoylhydrazide (OMBH) is an excellent nucleating agent of poly(butylene adipate-co-terephthalate) (PBAT). The nucleation efficiency of PBAT by the OMBH could reach 59.6%. PBAT crystallized in the transcrystalline form on fine OMBH fiber. Dipole-dipole interactions between OMBH and PBAT promoted PBAT crystallization.
Brief summary: This paper describes the effect of infrared lamp power on PEBA parts from the point of view of microstructure and mechanical properties. It proves the applicability of high-speed sintering process to PEBA materials. The forming parameters and performance parameters in this paper can provide guidance for its application.
This work leverages scattering theory of perfect crystals to accurately identify the symmetry of simulation results for unit cell studies of block copolymers. Its unique advantages involve low computational requirements, high scalability and online modifiability, thereby facilitating the development of automated research workflows for ordered phases in block copolymers.