Journal of Materials Chemistry C
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2023
·Vol. 11
·期 20
·6741-6749
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IF 6.4
Changhao Qian,Yueqin Li,Lingke Liu,Chen Chen,Lin Han
Integration of mechanical and actuation properties with sensory feedback function in soft actuators remains a challenge. Herein, a highly stretchable and electrically conductive hydrogel with fast stimuli-responsive actuating performance is prepared by in situ growth of polyaniline (PANI) nanoparticles in the Pluronic F127 diacrylate (F127DA) cross-linked poly(N-isopropyl acrylamide) (PNIPAM) hydrogel matrix. The obtained PNIPAM/PANI hydrogel exhibits high stretchability (730%) and fast deswelling properties upon heating. Taking advantage of highly efficient photothermal conversion of the embedding PANI, this hydrogel shows a significant temperature rise of ∼50 °C within 150 s and large volume shrinkage of 65% upon near-infrared (NIR) light irradiation. Accordingly, the hydrogel is explored as an underwater actuator, which has achieved programmable deformations to simulate hand-like gestures and Venus flytrap-type locomotion under local NIR irradiation. In addition, the hydrogel is able to translate the local strain into electrical signals. The light-triggered actuation, including bending, weight lifting and moving objects can be monitored by real-time resistance change. These results confirm that actuating and real-time sensory feedback could be integrated in a single homogeneous material, which make it an outstanding candidate in soft actuators and even intelligent biomimetic devices.
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APPLIED SURFACE SCIENCE
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2023
·
IF 6.7
Yihan Wang,Xiang Chu,Hongrui Zhang,Cheng Yan,Guo Tian,Weiqing Yang,Xiangrong Chen,Haitao Zhang
Conjugated polymers promise extremely-high theoretical supercapacitance to develop large capacitive storage devices. Existing conjugated polymers commonly realize their < 20% supercapacitance due to inferior electronic and electrochemical activities. Here we report hyper-conjugated effect to minimize energy level difference and carrier migration barrier in copolymerized polyaniline (PANI), a typical supercapacitive material. The hyper-conjugated effect efficiently promotes the elongation of conjugation system and the delocalization of π electrons. The largely increased number of free carriers in combination with the expanded range of carrier mobility guarantee 800% increments in electrical conductivity. Tests of symmetric supercapacitors with hyper-conjugated PANI show a high specific capacitance of 512 F g −1 , excellent rate-capability and long-term cyclability. This work paves the way for designing conjugated polymers with remarkable electronic and electrochemical properties.
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Materials Today Communications
·
2023
·
IF 3.8
Yang Chen,Rui Zhou,Dan Wu,Zhuoyue Liu,Yunfa Si,Dan Liu,Renxin Xu
Poor interfacial adhesion of composites deriving from the surface smoothness and inertness of poly (p-phenylene benzobisoxazole) (PBO) fibers severely constrains the extensive application of the fillers. Constructing the functional coating is generally considered a non-destructive and scalable strategy to simultaneously improve the asperity and activity of PBO fiber surfaces. Herein, we report a facile method to boost the interfacial adhesion in PBO fiber/epoxy composite by employing finely granular-structured polyaniline (PANI) as an interfacial intensifier. Via a mild and efficient in situ polymerization technique, the positively charged micron-scale PANI particles are uniformly anchored onto the negatively charged PBO fibers to form delicate leather-like surface layer containing substantial amino groups. Meanwhile, the resulting PBO fibers maintain excellent mechanical properties . Therefore, the PANI-coated PBO fiber/epoxy composite (PBO@PANI/EP) shows the significant increase in interfacial shear strength (41.0 MPa) and interlaminar shear strength (44.9 MPa), soaring by 60.16 % and 54.83 %, respectively. The debonding behavior and fracture surfaces confirm that the interfacial failure mechanism of PBO@PANI/EP converts from adhesive failure to both cohesive and substrate failure. The strategy in this work to modify PBO fiber surfaces for increasing the interfacial combination of composite is cost-effective and feasible to scale up.
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BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Pinpin Yang,Yaqian Gao,Lefei Xue,Yu Han,Jingkun An,Weihua He,Yujie Feng
Natural biomass is a promising candidate for manufacturing an efficient anode in the microbial electrochemical system (MES) for its abundance and low cost. However, the structure and performance of the electrode highly depend on the biomass species. A simple and sustainable method for creating a self-supporting electrode is proposed by freeze-drying and carbonizing a blend of cellulose, lignin, and hemicellulose. This strategy leads to a cork-like structure and improved mechanical strength of the lignocellulose carbon. A power density of 4780 ± 260 mW m −2 (CLX-800) was achieved, which was the highest record for unmodified lignocellulose-based anodes in the microbial fuel cells. The morphological as lamellar multilayer and rich in hydrophilic functional groups could facilitate the formation of thick electroactive biofilms and enrich Geobacter with the highest abundance of 92.3%. The CLX material is expected to be the ideal electrode for high performance and functionally controllability.
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JOURNAL OF SUPERCRITICAL FLUIDS
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2023
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IF 3.9
Wei Guo,Ben Li,Haijun Chi,Zhongliang Jiang,Liu Qing Wei,Edward D. Ramsey
Two flow selection interfaces have been developed for connecting single or linked reactors with on-line SFC equipped with UV/Vis diode-array (DAD) and mass spectrometer detectors coupled in series (SFC-DAD-MS). This process analytical technology system, enabled the study of reactions performed in supercritical fluid carbon dioxide (SF-CO 2 ). Each interface is designed to obtain on-line samples at different reaction progress points. Three single stage electrophilic annulation reactions performed in SF-CO 2 using aniline, indole and pyrrole as amine reactants to synthesize N-heterocyclic products within a stirred continuous flow reaction vessel containing montmorillonite K-10 catalyst were monitored. Also, both stages of a two step synthetic procedure conducted within two connected continuous flow reaction coil systems were monitored using on-line SFC-DAD-MS. The first step involved a Knoevenagel reaction in SF-CO 2 that provided a continuous feed to perform a second stage acetylation reaction. Use of on-line SFC-DAD-MS enabled early detection and characterization of unexpected by-products.
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Nanomaterials
·
2023
·Vol. 13
·期 12
·1827
·
IF 5.3
Huaide Jiang,Xiaoli He,Ming Yang,Chengzhi Hu
Light-driven electrophoretic micromotors have gained significant attention recently for applications in drug delivery, targeted therapy, biosensing, and environmental remediation. Micromotors that possess good biocompatibility and the ability to adapt to complex external environments are particularly attractive. In this study, we have fabricated visible light-driven micromotors that could swim in an environment with relatively high salinity. To achieve this, we first tuned the energy bandgap of rutile TiO2that was hydrothermally synthesized, enabling it to generate photogenerated electron-hole pairs under visible light rather than solely under UV. Next, platinum nanoparticles and polyaniline were decorated onto the surface of TiO2microspheres to facilitate the micromotors swimming in ion-rich environments. Our micromotors exhibited electrophoretic swimming in NaCl solutions with concentrations as high as 0.1 M, achieving a velocity of 0.47 μm/s without the need for additional chemical fuels. The micromotors’ propulsion was generated solely by splitting water under visible light illumination, therefore offering several advantages over traditional micromotors, such as biocompatibility and the ability to operate in environments with high ionic strength. These results demonstrated high biocompatibility of photophoretic micromotors and high potential for practical applications in various fields.Keywords:micromotors;visible light;ion-tolerant;biocompatibility
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ORGANIC PROCESS RESEARCH & DEVELOPMENT
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2023
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IF 3.4
Shichun Weng,Wei Feng,Wenqian Wu,Zichao Guo,Liping Chen,Wanghua Chen
Nitrophenols and corresponding sodium nitrophenolates are the main side products in the production of mononitrobenzene (MNB). These side products are hazardous due to their thermal instability nature. In this article, the thermal decomposition behaviors of nitrophenols and sodium nitrophenolates were first characterized by differential scanning calorimeter and accelerating rate calorimetry techniques. Then, the influence of phenol and sodium phenolate on the thermal decomposition of MNB was studied to clarify the effect of phenolic hydroxyl groups on the thermal stability of nitrophenols. It was found that compared to nitrophenols, the exothermic peaks of sodium nitrophenolates were more intense and presented strongly autocatalytic features. Sodium phenolate could significantly decrease the decomposition temperature of MNB. Aniline was detected as the unique product in the decomposition processes of pure MNB and MNB/sodium phenolate mixtures, and the nitrosobenzene was verified as the intermediate product. It was experimentally proven that sodium phenolate could catalyze the decomposition of nitrosobenzene (the decomposition intermediate of MNB). The violent decomposition of sodium nitrophenols was caused by the intermolecular catalysis effect of phenoxy groups.
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MACROMOLECULAR RAPID COMMUNICATIONS
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2023
·Vol. 44
·期 15
·2300141
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IF 4.6
Tianqi Liang,Qiwen Huang,Zhaoyang Wei,Weiwei Lei,Jun You,Jie Liu,Xiaoming Ren,Qunchao Zhang,Guohua Hu,Dean Shi
In order to get stable co-continuous morphology in immiscible polymer blends, besides reducing the interfacial tension, the compatibilizer should not only promote the formation of flat interface between different phases, but also not hinder the coalescence of the dispersed phase. Herein, the relationship between the morphology of the compatibilized polystyrene/nylon 6/styrene-maleic anhydride (PS/PA6/SMA) immiscible polymer blends and the structures of the in-situ formed SMA-g-PA6 graft copolymers as well as the processing conditions are studied. Two kinds of SMA are used: SMA28 (28 wt.% MAH) and SMA11 (11 wt.% MAH). After melt blending with PA6, the in-situ formed copolymer SMA28-g-PA6 has on average of four PA6 side chains, while that of SMA11-g-PA6 has only one. Dissipative particle dynamics simulation results indicate that both SMA28-g-PA6 copolymer and PS/PA6/SMA28 blends tend to form co-continuous structure, while those related to SMA11 intend to form sea-island morphologies. These results are correct only at relatively low rotor speed (60 rpm). When the rotor speed is higher (105 rpm), sea-island morphologies are obtained in SMA28 systems, while that for SMA11 ones are co-continuous. This indicates that higher shear stress can elongate the minor phase domains to form flat interfaces, while the SMA28-g-PA6 copolymers can be pulled out from the interface.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Weijie Lin,Shuai Wu,Shibo Han,Jie Xie,Hongshen He,Qiuxia Zou,Dezhong Xu,Dengwen Ning,Ajoy Kanti Mondal,Fang Huang
The highly conductive and elastic three-dimensional mesh porous material is an ideal platform for the fabrication of high electrical conductivity conductive aerogels. Herein, a multifunctional aerogel that is lightweight, highly conductive and stable sensing properties is reported. Tunicate nanocellulose (TCNCs) with a high aspect ratio, high Young's modulus , high crystallinity, good biocompatibility and biodegradability was used as the basic skeleton to prepare aerogel by freeze-drying technique. Alkali lignin (AL) was used as the raw material, polyethylene glycol diglycidyl ether (PEGDGE) was used as the cross-linking agent, and polyaniline (PANI) was used as the conductive polymer. Preparation of aerogels by freeze-drying technique, in situ synthesis of PANI, and construction of highly conductive aerogel from lignin/TCNCs. The structure, morphology and crystallinity of the aerogel were characterized by FT-IR, SEM, and XRD. The results show that the aerogel has good conductivity (as high as 5.41 S/m) and excellent sensing performance. When the aerogel was assembled as a supercapacitor, the maximum specific capacitance can reach 772 mF/cm 2 at 1 mA/cm 2 current density, and maximum power and energy density can reach 59.4 μWh/cm 2 and 3600 μW/cm 2 , respectively. It is expected the aerogel can be applied in the field of wearable devices and electronic skin.
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BIOSENSORS & BIOELECTRONICS
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2023
·
IF 12.6
Gang Xiao,Jun Ju,Min Li,Huajun Wu,Yihao Jian,Wei Sun,Wei Wang,Chang Ming Li,Yan Qiao,Zhisong Lu
The yarn-based sweat-activated battery (SAB) is a promising energy source for textile electronics due to its excellent skin compatibility, great weavability, and stable electric output. However, its power density is too low to support real-time monitoring and wireless data transmission. Here, we developed a scalable, high-performance sweat-based yarn biosupercapacitor (SYBSC) with two symmetrically aligned electrodes made by wrapping hydrophilic cotton fibers on polypyrrole/poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate)-modified stainless steel yarns. Once activated with artificial sweat, the SYBSC could offer a high areal capacitance of 343.1 mF cm −2 at 0.5 mA cm −2 . After 10,000 times of bending under continuous charge-discharge cycles and 25 cycles of machine washing , the device could retain the capacitance at rates of 68% and 73%, respectively. The SYBSCs were integrated with yarn-shaped SABs to produce hybrid self-charging power units. The hybrid units, pH sensing fibers, and a mini-analyzer were woven into a sweat-activated all-in-one sensing textile, in which the hybrid, self-charging units could power the analyzer for real-time data collection and wireless transmission. The all-in-one electronic textile could be successfully employed to real-time monitor the pH values of the volunteers’ sweat during exercise. This work can promote the development of self-charging electronic textiles for monitoring human healthcare and exercise intensity.
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MOLECULES
·
2023
·Vol. 28
·期 9
·3752
·
IF 4.6
Mingzhu Yang,Wenhua Ji
To efficiently eliminate highly polar organic pollutants from water has always been a difficult issue, especially in the case of ultralow concentrations. Herein, we present the facile synthesis of quinolinecarboxylic acid-linked COF (QCA–COF) via the Doebner multicomponent reaction, possessing multifunction, high specific surface area, robust physicochemical stability, and excellent crystallinity. The marked feature lies in the quinolinyl and carboxyl functions incorporated simultaneously to QCA–COF in one step. The majorcis–orientation of carboxyl arms in QCA–COF was speculated by powder X–ray diffraction and total energy analysis. QCA–COF demonstrates excellent adsorption capacity for water–soluble organic pollutants such as rhodamine B (255.7 mg/g), methylene blue (306.1 mg/g), gentamycin (338.1 mg/g), and 2,4–dichlorophenoxyacetic acid (294.1 mg/g) in water. The kinetic adsorptions fit the pseudo–second order model and their adsorption isotherms are Langmuir model. Remarkably, QCA–COF can capture the above four water–soluble organic pollutants from real water samples atppblevel with higher than 95% removal efficiencies and excellent recycling performance.
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PHYTOCHEMICAL ANALYSIS
·
2023
·Vol. 34
·期 5
·540-547
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IF 3.3
Ningning Zhao,Junpeng Xing,Zhong Zheng,Fengrui Song,Zhiqiang Liu,Shu Liu
Introduction Relieving toxicity and enhancing a calming effect after processing Polygalae Radix (PR) are widely known. Aromatic carboxylic acids (ACAs) may be crucial processed products. However, due to the limited detection methods for ACAs, the whole metabolic profiles via intestinal bacteria are still not very clear. Objective Designing a novel strategy for the detection of ACAs and tracking the whole metabolic profiles before and after processing PR. Materials and Methods The stable-isotope labelling derivatisation (SILD) method based on multidimensional ultra-high performance liquid chromatography coupled with a mass spectrometer (UHPLC-MS) technology and UNIFI-pathway mode was firstly designed to systematically study the metabolisms of all the drug-derived ingredients ranging from m/z 100 to 2000 in processing PR via intestinal bacteria. Firstly, the SILD with UHPLC coupled with a triple-quadrupole MS technology was designed to trace eight ACA metabolites of the processed PR with intestinal bacteria. Additionally, the UHPLC coupled with a quadrupole time-of-flight MS with UNIFI-pathway mode was adopted to monitor relatively big metabolites. Results The metabolism mechanism of ACAs (eight kinds) and the relatively big molecular metabolites (98 kinds) were deeply traced in PR, PR with refined honey (HP), and PR with licorice (LP) via the intestinal bacteria. Totally 106 intact metabolic profiles of drug-derived ingredients were presented. Importantly, the influence of LP on the metabolism of compounds after incubation of intestinal bacteria was greater than that of HP. Conclusion This research provides a comprehensive and systematic guidance for further study on in vivo metabolisms of the processed PR.
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