Hydrogen bonding mediated self‐assembled structures from block copolymer mixtures to mesoporous materials

Abstract

The self‐assembled structures formed through hydrogen bonding interaction of block copolymers in polymeric materials are interesting materials because of their potential applications in biomedicine, nanopatterning and photonics, taking advantage of their responsive and tunable properties. In this review, we discuss the self‐assembled nanostructures that can be obtained from hydrogen‐bonded diblock copolymer/homopolymer (A‐b‐B/C) and diblock copolymer (A‐b‐B/C‐b‐D) mixtures in the bulk and how these block copolymer mixtures can then be used to synthesize mesoporous silica, phenolic and carbon materials. © 2021 Society of Industrial Chemistry.

Double-Decker-Shaped Polyhedral Silsesquioxanes Reinforced Epoxy/Bismaleimide Hybrids Featuring High Thermal Stability

“…3450 cm −1 due to secondary OH stretching after thermal polymerization, indicating the ring-opening reaction of epoxy with the amine group from the BMI and DDSQ-BMI units [66]. Most importantly, these secondary OH groups could form the intermolecular hydrogen bonding interaction with the Si-O-Si groups of DDSQ from 1134 cm −1 for pure DDSQ-BMI, which was shifted to 1128 cm −1 , as blending with epoxy resin after thermal polymerization enhances the miscibility, thermal, and mechanical properties of polymer matrix, as widely discussed in our previous works [67,68]. TGA analyses of various amounts of epoxy/BMI or epoxy/DDSQ-BMI hybrids before and after the thermal polymerization procedure at 300 • C is shown in Figure 5a-d.…”

“…The DDSQ cage structure can reduce the organic material decomposition due to the covalent bond of DDSQ into BMI units; this restricts the thermal motion of epoxy and BMI units through the formation of a network structure with this inorganic DDSQ cage. The DDSQ may possess the ceramic inorganic layer during the combustion at the early stage because of its low surface free energy property [67], and this DDSQ layer could protect and limit the heat transfer from the O 2 diffusion in epoxy or BMI resin. Compared with epoxy/BMI and epoxy/DDSQ-BMI = 1/1 system, the T d value is increased from 350 to 397 • C and the char yield is significantly increased from 25.1 to 40.4 wt% after the incorporation DDSQ units into the BMI monomer.…”

Ultrastable Covalent Triazine Organic Framework Based on Anthracene Moiety as Platform for High-Performance Carbon Dioxide Adsorption and Supercapacitors

“…Various studies have been conducted to date in order to provide highly sustainable and efficient energy storage systems, which include metal oxides [ 19 , 20 ], metal–organic framework (MOFs) [ 21 , 22 ], activated carbon [ 23 , 24 , 25 ], porous carbon and graphene [ 26 , 27 , 28 , 29 ], porous organic polymer [ 30 , 31 , 32 , 33 , 34 ], and other carbon-based materials [ 35 , 36 ]. Because of their higher mechanical stability, low densities, higher surface area, and greater extent of porosity, newly developed porous organic polymers and covalent triazine frameworks (CTFs) have been widely discussed, making this type of material very unique in providing highly efficient energy storage devices and other potential applications [ 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. CTF precursors are materials containing nitrogen, which are easily formed by cyclotrimerization of aryl nitriles under ionothermal conditions [ 44 ].…”

Intra- and Intermolecular Hydrogen Bonding in Miscible Blends of CO2/Epoxy Cyclohexene Copolymer with Poly(Vinyl Phenol)

“…The Hbonding interaction in PPC/PVPh blends have been characterized using FTIR, X-ray photoelectron, electron spin resonance, and Raman spectroscopy [25,26], confirming that H-bonding between the PPC C=O units and PVPh OH units enhances the miscibility of this binary blend. Nevertheless, compared to the H-bonding in binary blends of PVPh with other carbonyl-functionalized polymers (e.g., polyvinylpyrrolidone, polycaprolactone, and even PMMA) [27][28][29][30][31][32][33], a relatively lower fraction of H-bonded C=O units appear in the PPC/PVPh binary blends. This phenomenon is similar to that in PLA/PVPh binary blends, where strong intramolecular [C-H•••O=C] H-bonding in PLA homopolymers inhibits the intermolecular H-bonding of the OH units of PVPh with the C=O units of PLA, where the interassociation equilibrium constant is quite low (K A < 10), indicative of a low ability to accept H-bonding [33][34][35].…”