In this mini-review, we have discussed recent research on photostimulus-responsive non-covalent interactions in polymers. Photo-responsive polymers are a new type of material that is being developed for various applications, such as drug delivery, information storage, sensors, self-healing, anti-bacterial, and environmental applications.
Two narrow-bandgap polymers, PBDF and PBDFCl, were synthesized, exhibiting red-shifted absorption, lower the highest occupied molecular orbital level and stronger aggregation than thiophene analogues. The power conversion efficiency of PBDFCl:Ph(PDI)3-based organic solar cells was 8.84%, much higher than PCE10-based ones (6.09%), among the top performing ones that utilize PDI-based acceptors.
Amphiphilic pH-responsive copolyprodrug (P(ADH-DOX-Fc)-PEG) with doxorubicin and ferrocene as structural units in the main chain via acid-labile conjugations was designed as drug self-delivery system for combination of ferroptosis and chemotherapy in cancer treatment, exhibiting a combination index of 0.88.
The emulsion copolymerization of chlorotrifluoroethylene (CTFE) and vinyl ethers using an environmentally friendly emulsification system to produce waterborne FEVE was investigated. An optimized emulsifier system for FEVE is proposed, and the prepared FEVE latexes exhibit excellent storage stability and film formation ability.
By incorporating cis-trans isomers of dicarboxylic acids—citraconic acid and mesaconic acid—into the polymer network of poly(N-isopropylacrylamide), pH-temperature dual-responsive core-shell microgels were successfully synthesized. Molecular structure and crosslinking position of the dicarboxylic acids significantly affected the interfacial behavior and bulk viscoelasticity of the core-shell microgels.
Six bis-β-ketoimine binuclear titanium complexes were synthesized and showed good performance for ethylene (co)polymerization. The intermetallic distances of isomers 4a, 4d, 4e and 4f influenced significantly the catalytic performance. Complex 4a with the shortest bimetallic distance exhibited the best performance because of more appropriate bimetallic distance and stronger synergistic effect.
PVDF films of controlled β/γ ratio were facilely fabricated by spin-coating and using KBr as nucleating agent. It is the ion-dipole interaction between dissolved K and Br ions and PVDF chains, rather than surface epitaxy, plays an important role in polymorphic behavior.
Reserving high-content of long-chain shish crystals in UHMWPE gel films can induce the formation and orientation of more shish-kebab crystals. By introducing ultra-long chains into the UHMWPE gel system, adjusting the plasticization temperature, and optimizing the hot-stretching process, a high-content and highly ordered shish-kebab crystal structure is ultimately constructed.
SC crystallite fibers, as nucleating agent and reinforcing agent, will not sacrifice the transparency and degradation of PLLA, which provides a strategy for obtaining transparent PLLA-based composite films with synchronous enhancement of crystallization and mechanical properties.
In this work, PTFE aerogels with excellent sound absorption and thermal insulation properties were successfully prepared. In addition, the PTFE aerogels had good temperature and corrosion resistance, which exhibit great potential for application in harsh environments.
We use interfacial polymerization method to prepare thin-film composite membranes consisting of polyamide skin layer and electrospun nanofibrous substrate with tunable water permeability and IL selectivity for osmotic enrichment of ILs through FO process. Imidazolium ILs are ultimately enriched with a 100-fold increase in concentration from their dilute aqueous solutions.
A novel CS@SA@ZIF-67 core-shell nano-hybrid was synthesized and incorporated into epoxy resin (EP) to prepare flame retardant nanocomposites (EP/CS@SA@ZIF-67). The hybrid and char residue analysis results demonstrated that CS@SA@ZIF-67 hybrid was a promising candidate in the field of multifunctional fabrics with simultaneously improved flame retardancy and smoke suppression behaviors.
The sliding dynamics of charged ring relies strongly on the electrostatic interaction strengths A, the salt concentratics on and valence of cation. And the dependence of the sliding diffusion coefficient D of ring on A in the divalent salt solution is different from that in the monovalent salt solution.
To enhance the quality of silicone printed specimens and reduce production costs, an improved KELM machine learning model combined with a genetic algorithm was developed. Experiments show this algorithm's prediction accuracy surpasses others, with printed samples' performance improving post-optimization.
This work synthesized a novel monomer containing crosslinkable group- tetrafluorostyrene, prepared a series of polyimide films further, and improved the heat resistance of PI through thermal crosslinking. The Td5% and Tg of the crosslinked PI films increased by about 40 °C compared to before crosslinking.