Foods
·
2021
·Vol. 10
·期 10
·2339
·
IF 4.35
Zhichao Yang,Chaoyi Shen,Yucheng Zou,Di Wu,Hui Zhang,Kunsong Chen
Gelatin (GA) is a natural protein widely used in food packaging, but its fabricated fibrous film has the defects of a high tendency to swell and inferior mechanical properties. In this work, a novel spinning technique, solution blow spinning (SBS), was used for the rapid fabrication of nanofiber materials; meanwhile, nylon 66 (PA66) was used to improve the mechanical properties and the ability to resist dissolution of gelatin films. Morphology observations show that GA/PA66 composite films had nano-diameter from 172.3 to 322.1 nm. Fourier transform infrared spectroscopy and X-ray indicate that GA and PA66 had strong interaction by hydrogen bonding. Mechanical tests show the elongation at break of the composite film increased substantially from 7.98% to 30.36%, and the tensile strength of the composite film increased from 0.03 MPa up to 1.42 MPa, which indicate that the composite films had the highest mechanical strength. Water vapor permeability analysis shows lower water vapor permeability of 9.93 g mm/m2h kPa, indicates that GA/PA66 film’s water vapor barrier performance was improved. Solvent resistance analysis indicates that PA66 could effectively improve the ability of GA to resist dissolution. This work indicates that SBS has great promise for rapid preparation of nanofibrous film for food packaging, and PA66 can be applied to the modification of gelatin film.Keywords:solution blow spinning;gelatin;nylon 66;modification;rapid fabrication
研究领域:
材料科学
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纳米技术
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食品包装
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2020
·
IF 8.352
Tao Zhang,Zhiguang Xu,Xiaomin Li,Guohong Gao,Yan Zhao
While phase change material (PCM)-encapsulated polyHIPE monoliths are advantageous for latent heat storage, brittleness and time-consuming preparation hinder their wide application. Herein, we report the rapid fabrication of closed-cell, flexible monoliths through emulsion templating in seconds through ammonia-catalyzed interfacial thiol-Michael addition. Using an organic PCM (octodecane, OD) as the dispersed phase, OD-encapsulated monoliths with flexibility were fabricated for the first time. The monoliths exhibited high flexibility at temperature over 30 °C and robust compressive property. The OD-encapsulated monoliths possessed extremely high heat capacity (up to 213 J/g, ~90% pure OD), and high reusability/stability (without obvious deterioration in heat capacity after 100 heating/cooling cycles). The feature that combines the rapid synthesis, high flexibility, mechanical robustness, high heat capacity and good reusability/stability enabled the OD-encapsulated monoliths to be excellent candidates for latent heat storage.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Gels
·
2023
·Vol. 9
·期 5
·380
·
IF 4.6
Ying Qin,Hao Li,Hai-Xia Shen,Cai-Feng Wang,Su Chen
Hydrogels have received increasing interest owing to their excellent physicochemical properties and wide applications. In this paper, we report the rapid fabrication of new hydrogels possessing a super water swelling capacity and self-healing ability using a fast, energy-efficient, and convenient method of frontal polymerization (FP). Self-sustained copolymerization of acrylamide (AM), 3-[Dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azaniumyl]propane-1-sulfonate (SBMA), and acrylic acid (AA) within 10 min via FP yielded highly transparent and stretchable poly(AM-co-SBMA-co-AA) hydrogels. Thermogravimetric analysis and Fourier transform infrared spectroscopy confirmed the successful fabrication of poly(AM-co-SBMA-co-AA) hydrogels with a single copolymer composition without branched polymers. The effect of monomer ratio on FP features as well as porous morphology, swelling behavior, and self-healing performance of the hydrogels were systematically investigated, showing that the properties of the hydrogels could be tuned by adjusting the chemical composition. The resulting hydrogels were superabsorbent and sensitive to pH, exhibiting a high swelling ratio of up to 11,802% in water and 13,588% in an alkaline environment. The rheological data revealed a stable gel network. These hydrogels also had a favorable self-healing ability with a healing efficiency of up to 95%. This work contributes a simple and efficient method for the rapid preparation of superabsorbent and self-healing hydrogels.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Haoyue Zhao,Xinyu Li,Fangqin Su,Ning Qi,Jian Fang
High-temperature heat treatment is a crucial thermochemical process for pyrolysis/carbonization of carbon nanofibers (CNFs). However, the inefficient heat transfer process of traditional heating methods often results in inhomogeneous heating, low porosity, long preparation times, and high energy consumption. Here, we first use electrospinning and microwave heating techniques to rapidly fabricate porous CNFs with the help of microwave absorbers. To deeply understand the microwave heating mechanism and differences with traditional heating, we systematically investigate and analyze the effects of the type and concentration of the microwave absorbers, microwave heating parameters, and two heating mechanisms (microwave and traditional heating) on the fabrication of CNFs by experimental investigation and COMSOL simulations. Such microwave heating technique can enable an ultrafast heating rate (up to 250 °C min −1 on average). Due to the rapid internal and volumetric heating, CNFs prepared using microwave heating exhibit a larger carbon content (92.86 %) and a larger BET specific surface area (687 m 2 /g) than their counterparts prepared using traditional heating methods (88.49 % and 460.7 m 2 /g). Moreover, the possible mechanisms of microwave heating have been explained. This work paves the way for the fabrication of porous CNFs and other advanced carbon nanomaterials using microwave heating techniques.
研究领域:
材料科学
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能源工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Shuai Sun,Xiao-Lei Shi,Meng Li,Ting Wu,Liangcao Yin,Dezhuang Wang,Qingfeng Liu,Zhi-Gang Chen
Due to their cost-effectiveness and industry-scale feasibility, carbon-based composites have been considered to be promising thermoelectric materials for low-grade power generation. However, current fabrications for carbon-based composites are time-consuming, and their thermoelectric properties are still low. Herein, we develop an ultrafast and cost-effective hot-pressing method to fabricate a novel carbon-based hybrid film, which consists of ionic liquid/phenolic resin/carbon fiber/expanded graphite. This method only costs no more than 15 min. We found that the expanded graphite as the major component enables high flexibility and the introduction of phenolic resin and carbon fiber enhances the shear resistance and toughness of the film, while the ion-induced carrier migration contributes to a high power factor of 38.7 μW m–1 K–2 at 500 K in the carbon-based hybrid film. After the comparison based on the ratios between the power factor with fabrication time and cost among the current conventional carbon-based thermoelectric composites, our hybrid films show the best cost-effective property. Besides, a flexible thermoelectric device, assembled by the as-designed hybrid films, shows a maximum output power density of 79.3 nW cm–2 at a temperature difference of 20 K. This work paves a new way to fabricate cost-effective and high-performance carbon-based thermoelectric hybrids with promising application potential.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Changmeng Xu,Qing Wei,Mai Li,Jie You,Wenming Song,Xiaojun Wang,Guoxin Zhang,Huifang Li,Yan He,Zhiming Liu
Rational construction of film electrodes remains challenge for the development of flexible energy storage devices. With excellent mechanical and electrical properties, graphene is the most promising flexible matrix material that can give full play to synergistic effects among components. However, typical methods for preparation of graphene-based films usually require complex production process. Herein, we propose a general strategy that can integrate the ultrafast construction of reduced graphene oxide (rGO)-based flexible composite films within 1–5 min by facile reduction and crosslinking. Using such approach, the obtained rGO-based films have extensively tunable architectures, compositions, and loadings simply by modulating components, ratio, concentration, and amount of the blended slurry. Meanwhile, these porous conductive films have excellent structural stability and volume buffering effect. The Fe 3 O 4 @rGO flexible film as an example for LIBs anode was evaluated and showed favorable cycling stability and rate capability. Even the mass loading was 6.0 mg cm −2 , it was able to maintain a high specific capacity of 396 mA h g −1 at 1.0 A g −1 after 100 cycles. Compared with previous graphene-based film preparation processes, this work provides a rather novel and speedy fabrication strategy for functional and flexible graphene-based composites.
研究领域:
材料科学
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能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Min Sang,Guanghui Liu,Shuai Liu,Yuxuan Wu,Shouhu Xuan,Sheng Wang,Shanyong Xuan,Wanquan Jiang,Xinglong Gong
In recent years, soft electrothermal actuators (ETAs) have attracted great concern because of their potential applications in biomimetic intelligent devices, soft robotics and aerospace engineering. However, achieving the simultaneous optimization of low-voltage actuation, ultrafast preparation and highly integrated functionality are main challenges to the development of ETAs. Herein, a flexible, hydrophobic, mechanically robust and electromagnetic-interference (EMI) shielding PTFE/MXene/PI soft ETA is constructed through a very simple and fast “cutting and sticking” method by taping PTFE and PI tapes onto the surface of MXene film. The commercially available PTFE and PI tapes endow PTFE/MXene/PI sandwich structure with ideal mechanically robustness and hydrophobic self-cleaning function, thus it can work in different environments. Remarkably, PTFE/MXene/PI sandwich structure shows an outstanding EMI shielding ability with the maximum SE T value of 44 dB owing to the high electrical conductivity of MXene film. More importantly, the PTFE/MXene/PI sandwich actuator can bend from PTFE side toward PI side under the electrical stimulus, because the excellent electrothermal MXene layer is sandwiched between the two tapes with large difference in thermal expansion coefficients. Under a 6 V low voltage, the actuator can generate heat energy with the maximum saturation temperature of 110 °C and large bending deformation with the maximum bending angle of 122° within 40 s. Interestingly, the PTFE/MXene/PI structure can be designed and manufactured in different shapes and configurations upon actuation, such as the “S” shape and four-finger gripper. At last, a smart shielding curtain with the combination of actuation properties and EMI shielding performance is finally developed as a principle of concept, which further indicates the multifunctional PTFE/MXene/PI ETA can be widely applied in smart EMI shielding system and soft robotic devices.
研究领域:
材料科学
·
智能设备
·
软体机器人
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiayu Lu,Yan Zhang,Zongchun Gao,Yihao Yu,Dongming Qi
Carbonized materials are extensively utilized in various fields such as energy storage, catalysis, refractories and electronic devices due to their excellent conductivity, chemical stability and lightweight properties. However, conventional preparation methods are characterized by high energy consumption, time-consuming procedures and the necessity of complex atmospheres, which do not align with sustainable development goals. In this study, waste cotton fabrics and bamboo powder were employed as biomass carbon sources for the fabrication of carbon composites at 900 °C for 15 min under an air atmosphere with intumescent flame retardant (IFR) serving as a catalyst. The carbon composites exhibited a fully interconnected woven network structure, with the internal fibers possessing a hollow-skeleton architecture, while the outer layer consists of a continuous porous carbon. These hollow-skeleton and porous-skin carbon composites exhibits remarkable electrical conductivity and multiple reflective surfaces, which confer excellent electromagnetic interference (EMI) shielding performance. Consequently, their EMI SE T value could achieve an average EMI shielding performance of 36.98 dB. Moreover, the carbon composites could effectively transport electrons and absorbs photons, facilitating both electrical and luminous energy conversion processes. Specifically, IFR-C-B 20 could reaching 115 °C within 60 s under a low voltage of 2 V, and the water evaporation rate could reach 1.27 kg·m −2 ·h −1 . This work introduced a novel approach for the preparation of multifunctional carbon composites, significantly expanding their practical applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 19
·2208177
·
IF 13.3
Shuo Li,Yu-Jie Sun,Zhao-Xu Wang,Cheng-Gang Jin,Ming-Jie Yin,Quan-Fu An
Mixed matrix membranes (MMMs), conjugating the advantages of flexible processing-ability of polymers and high-speed mass transfer of porous fillers, are recognized as the next-generation high-performance CO 2 capture membranes for solving the current global climate challenge. However, controlling the crystallization of porous metal-organic frameworks (MOFs) and thus the close stacking of MOF nanocrystals in the confined polymer matrix is still undoable, which thus cannot fully utilize the superior transport attribute of MOF channels. In this study, the “confined swelling coupled solvent-controlled crystallization” strategy is employed for well-tailoring the in-situ crystallization of MOF nanocrystals, realizing rapid (<5 min) construction of defect-free freeway channels for CO 2 transportation in MMMs due to the close stacking of MOF nanocrystals. Consequently, the fabricated MMMs exhibit approximately fourfold enhancement in CO 2 permeability, i.e., 2490 Barrer with a CO 2 /N 2 selectivity of 37, distinctive antiplasticization merit, as well as long-term running stability, which is at top-tier level, enabling the large-scale manufacture of high-performance MMMs for gas separation.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Liu He,Jiangyu Su,Teng You,Shuang Xiao,Ping Huang,Daiping He,Ping Jiang
Layered double hydroxides have been widely used for electrochemical glucose detection due to their layered structure with more active sites, but they suffer from lower electrical conductivity and long-time hydrothermal preparation. In this paper, NiFe-layered double hydroxide nanosheets supported on nickel foam (NiFe-LDH NSs/NF) was prepared using an ultrafast and facile method via in-situ corroding foam nickel in FeCl 3 solution under room temperature, and the whole synthetic process can be accomplished within several minutes. The as-fabricated NiFe-LDH NSs/NF shows significant catalytic activity in the glucose oxidation, showing its great promise in glucose detection. As a self-supported electrode, NiFe-LDH NSs/NF is favorable for glucose detection, with a sensitivity of 9.79 and 3.29 mA mM −1 cm −2 within the linear range of 0.001 to 1.16 mM and 1.16 to 4.67 mM, respectively. Moreover, NiFe-LDH NSs/NF is also selective and reliable towards glucose detection in drink sample.
研究领域:
电化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Qidong Yu,Wende Ma,Wenmin Zhang,Hui Chen,Qingqing Ding,Yuheng Guo,Jiangfan Yang,Lan Zhang
A facile and rapid strategy for preparation of covalent organic framework (COF) coated fibers at ambient temperature is urgently needed for solid-phase microextraction (SPME) technology . In this work, an in situ room-temperature rapid growth strategy was developed to high-efficiently fabricate imine-linked COF (TPB-DVA) coated fibers in as little as 30 min at room temperature , and the thickness of the coating reached 9 μm. The prepared TPB-DVA coated fiber offer high thermal and chemical stability, and outstanding service lifetime. Moreover, we generalize this strategy to other two imine-linked COF (TPB-DMTP and TFPB-TAPB) coated fibers and the fibers were fabricated at room temperature for 3 h and 12 h, respectively, which demonstrate the applicability of this strategy. Subsequently, a SPME-GC-MS/MS analytical method was developed for trace pyrethroids (PYs) detection, which exhibited high enhancement factors (EFs, 2700–13195), wide linear range (0.08–800 ng L −1 ), low limits of detection (LODs, 0.02–0.20 ng L −1 ), and good repeatability (RSD ≤ 8.5%, n = 6). Furthermore, the developed analytical method was applied to tea samples and trace PYs (1.31–4.32 ng L −1 ) were found with satisfactory recovery (80.2–119.8%). The above results demonstrated that the feasibility of the developed strategy for the facile and rapid fabrication of imine-linked COF coated fibers.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Zhinan Fu,Li Li,Fen Li,Rizwan Ahmed,Xiaofeng Niu,Dianhua Liu,Xuhong Guo
Nanosized organosilica particles with tunable morphology are of great interest for versatile applications because of their enhanced properties. However, it is still a great challenge to control the morphology during fabrication of organosilica nanoparticles (NPs). In this study, a facile approach based on flash nanoprecipitation (FNP) technique is presented, which achieves an efficient fabrication of organosilica NPs with controllable morphology by utilizing an amphiphilic block copolymer poly(2-(dimethylamino)ethylmethylacrylate-b-poly(ε-caprolactone) (PDMAEMA-b-PCL) as the stabilizer. Such a preparation process is performed in a multi-inlet vortex mixer that enables an intense mixing of the silicon precursor with the aqueous solution of a catalyst at an ultrashort time scale, leading to the formation of numerous tiny reaction droplets stabilized by PDMAEMA-b-PCL, followed by the basic-catalyzed hydrolytic condensation. Interestingly, by controlling the composition and mixing parameter of feeding streams involved in the FNP process, golf ball-like, cubic, bowl-like, and hollow organosilica NPs can be easily obtained. The resultant NPs show a narrow size distribution and are expected to find potential applications in various fields, such as nanomedicine, nanocatalysts, and adsorption separation.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）