High-Molecular-Weight PLA-b-PEO-b-PLA Triblock Copolymer Templated Large Mesoporous Carbons for Supercapacitors and CO2 Capture

Abstract

High-molecular-weight PLA440-b-PEO454-b-PLA440 (LEL) triblock copolymer was synthesized through simple ring-opening polymerization (ROP) by using the commercial homopolymer HO-PEO454-OH as the macro-initiator. The material acted as a single template to prepare the large mesoporous carbons by using resol-type phenolic resin as a carbon source. Self-assembled structures of phenolic/LEL blends mediated by hydrogen bonding interaction were determined by FTIR and SAXS analyses. Through thermal curing and carbonization procedures, large mesoporous carbons (>50 nm) with a cylindrical structure and high surface area (>600 m2/g) were obtained because the OH units of phenolics prefer to interact with PEO block rather than PLA block, as determined by FTIR spectroscopy. Furthermore, higher CO2 capture and good energy storage performance were observed for this large mesoporous carbon, confirming that the proposed approach provides an easy method for the preparation of large mesoporous materials.

Multifunctional Polyhedral Oligomeric Silsesquioxane (POSS) Based Hybrid Porous Materials for CO2 Uptake and Iodine Adsorption

“…The preparation of porous organic polymers (POPs) has become a hot topic in the academic and industry fields due to their interesting features, such as high physicochemical stability, porous character, low density, facile preparation, low regeneration energy, and good thermal and chemical stabilities [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. Porous organic polymers have been applied in different applications such as light harvesting, chemical sensors, catalysis, iodine uptake, H 2 production from water, water treatment, optoelectronic devices, carbon dioxide reduction, nanofiltration, enantioseparation, energy storage, gas separation, and adsorption [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. The synthesis of POPs was successfully achieved using various synthetic methods, including Friedel–Crafts arylation, Schiff base reactions, Suzuki reactions, Yamamoto reactions, Heck reactions, and Sonogashira reactions [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ].…”

Multifunctional Hypercrosslinked Porous Organic Polymers Based on Tetraphenylethene and Triphenylamine Derivatives for High-Performance Dye Adsorption and Supercapacitor

“…The BET surface area, total pore volume, and pore size diameter of the TPE-HPP were 922 m 2 g −1 , 0.86 cm 3 g −1 and 1.10 – 1.98 nm, respectively ( Figure 5 C ), while the DPT-HPP revealed a BET surface area, total pore volume and pore size diameter of 1230 m 2 g −1 , 1.03 cm 3 g −1 and 1.21–2.15 nm, respectively ( Figure 5 D ). Comparing with the reported HCPs, the specific surface area of our DPT-HPP (1230 m 2 g −1 ) was among the highest values of the other hypercrosslinked microporous polymers; for example, this includes the tetraphenylanthraquinone-based HCP (1980 m 2 g −1 ), binaphthol-based HCP (1015 m 2 g −1 ), and a porous organic polymer containing triazine and carbazole moieties (913 m 2 g −1 ) [ 20 , 58 , 59 , 60 ]. Furthermore, the SEM and TEM measurements were performed to confirm the porous properties of the TPE-HPP and DPT-HPP, as displayed in Figure 6 .…”

“…At 298 K and 1 bar pressure ( Figure 7 A ), the CO 2 adsorption capacity reached 1.65 and 1.85 mmol g −1 for the TPE-HPP and DPT-HPP, respectively, while the CO 2 capture was 1.91 and 2.06 mmol g −1 for the TPE-HPP and DPT-HPP, respectively, at 273 K ( Figure 7 B ). Both TPE-HPP and DPT-HPP exhibited higher values of CO 2 uptake than that of the tetraphenylanthraquinone-based HCPs such as An-CPOP-1 (1.30 mmol at 298 K and 1.40 mmol g −1 at 273 K) and An-CPOP-2 (1.40 mmol g −1 at 298 K and 1.52 mmol g −1 at 273 K) [ 20 ]. In addition, our materials showed higher CO 2 capture than silole-based HCPs (PDMTPAS, 1.02 mmol g −1 at 298 K), COF-102 (1.56 mmol g −1 at 273 K) and C2M1-Al (1.44 mmol g −1 at 273 K) [ 61 , 62 , 63 ].…”

“…MOPs have been used in many potential applications, such as water treatment, drug delivery, chemical sensing, heterogeneous catalysis, energy storage, hydrogen evolution, nanofiltration, oil scavenging, carbon dioxide reduction, gas separation and gas storage [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. There are different kinds of MOPs, such as conjugated microporous polymers (CMPs) [ 15 , 16 , 17 , 18 ], covalent organic frameworks (COFs) [ 16 , 17 , 18 , 19 , 20 ], polymers of intrinsic microporosity (PIMs) [ 21 , 22 , 23 ], covalent triazine-based frameworks (CTFs) [ 24 , 25 , 26 , 27 , 28 ], and hypercrosslinked polymers (HCPs) [ 29 , 30 , 31 , 32 ].…”

Highly Thermal Stable Phenolic Resin Based on Double-Decker-Shaped POSS Nanocomposites for Supercapacitors

“…Most importantly, the signals at 1090 cm −1 for the Si–O–Si units and at 1265 cm −1 for the Si–CH 3 units were still present after thermal heating at 900 °C, suggesting that the DDSQ units remained dispersed within the carbon matrix in the carbon/DDSQ hybrids. Raman spectroscopy (HORIBA Jobin–yvon, T6400, Edison, NJ, USA) revealed the local graphitic structure of this carbon/DDSQ hybrid ( Figure 7 b), with two major carbonized structures identified by G- and D-bands representing sp 2 - and sp 3 -hybridized carbon atoms at 1592 and 1340 cm −1 , respectively [ 40 , 41 ]. The G- and D-bands correspond to first- and second-order Raman scattering, respectively; this G-band had undergone a major shift from the wavenumber of a typical G-band (ca.…”