FOOD CHEMISTRY
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2025
·
IF 9.8
Lingling Bai,Chen Yang,Xiaomin Feng,Xianteng Meng,Hui Yi,Yiting Lu,Wenge Yang,Yonghong Hu
In this study, the inclusion complexes were prepared using an ultrasound-mediated technique using hydroxypropyl-β-cyclodextrin (HP-β-CD) as the main body and erythritol (Ery) as a functional component. Nanofiber films with antimicrobial and antioxidant activities were prepared by blending metal-organic frameworks (ZIF-8), inclusion complexes with polylactic acid (PLA)/gelatin (Gel)/glycerol (GI), and electrostatic spinning method for active packaging. The infrared spectroscopy and crystallographic analysis results indicate that the HPβCD/Ery inclusion complex was successfully prepared. With the addition of ZIF-8 and inclusion, the diameter of the nanofibers increased from 337.36 nm to 2184.20 nm, which improved the thermal stability, and hydrophilicity, and decreased the crystallinity of the fiber membrane and exhibited a sustained and controllable release of Ery for 240 h, thus delaying the degradation of grapes. This new antimicrobial packaging material with excellent biocompatibility and good slow-release performance will have a broad application prospect in food preservation.
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PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2026
·
IF 6.6
Ya-Nan Li,Bo-Han Zeng,Yu-Lin Yuan,Huan Xiong,Ye Tan,Jin Hu,Lin-Ping Yu,Ju-Lan Zeng
Silica-based functionalized composite aerogels possess the merits of high porosity and versatile properties, and can be utilized as a matrix for lots of applications including shape-stable phase change materials (SSPCMs). In-situ functionalization of silica-based aerogel, which can avoid challenges related to the dispersion of functional filler, presents a valuable but less-explored strategy. Herein, metallic copper-functionalized silica (Cu–SiO 2 ) aerogels were synthesized by co-condensing tetraethyl orthosilicate (TEOS) and 3-aminopropyltriethoxysilane (APTES) in the presence of copper acetate via an ambient pressure drying procedure followed by thermal reduction. The Cu 2+ was initially coordinated to the amino groups in APTES and in-situ anchored on the aerogel skeleton, which was then thermally reduced to metallic copper to fulfill the in-situ functionalization. Erythritol (ET) was then vacuum impregnated into the Cu–SiO 2 aerogels to obtain SSPCMs. The prepared SSPCMs exhibited a high ET loading of 86.9%, corresponding to a high latent heat of 307.5 J g −1 , and reduced supercooling. When the aerogel framework contained 3.46 wt% copper, the thermal conductivity of the SSPCM increased by 83.03% compared with that of pure ET. The SSPCM also showed a photothermal conversion efficiency of 71.82% due to the local surface plasmon resonance effect of metallic copper and the multidirectional light-scattering paths provided by the aerogel. In addition, the SSPCMs exhibited excellent thermal reliability over 100 melting/solidification cycles. Overall, this work presents a novel strategy for the preparation of functionalized silica-based composite aerogels and obtained a novel SSPCM for latent heat storage and solar thermal applications.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Ni Tan,Ting Xie,Yang Feng,Ping Hu,Qi Li,Liu-Mo Jiang,Wen-Bo Zeng,Ju-Lan Zeng
Sepiolite (Sep) and exfoliated graphite nanoplatelets (xGnP) were applied as supporting material and thermal conductive fillers to solve the problems of possible leakage, low thermal conductivity and high supercooling of m -erythritol (ME) as a phase change material (PCM). The loading of ME in the ME/Sep form-stable PCMs could attain 56 wt% when the Sep was treated by 2.5 M HCl and heated at 800 °C for 1 h. The form-stable PCMs were basically physical mixtures though there were some interactions occurred between the hydroxyl groups of ME and Sep. The thermal stability of ME was improved after it was confined in the supporting materials. In addition, the thermal conductivity of the ME/Sep/xGnP form-stable PCM containing 56% ME and 8.0 wt% xGnP could be enhanced to 0.756 W/mK, which was 103% higher than the corresponding ME/Sep form-stable PCM. Moreover, the transient temperature response of the form-stable PCMs was greatly improved by Sep and xGnP. Furthermore, the supercooling of ME could be decreased from 80 °C for pure ME to about 30 °C in the ME/Sep/xGnP form-stable PCM containing 56% ME and 8.0 wt% xGnP. Besides, the latent heat recovery ratio of the ME/Sep/xGnP form-stable PCMs were also greatly improved.
研究领域:
材料科学
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热能工程
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Yuchao Xu,Shi Tang,Zongqi Li,Wendong Liang,Jikun Xu,Jinbo Ouyang,Chuntao Zhang
The polythermal method (PTM) was employed to measure metastable zone width (MSZW) of erythritol (ERT) in solvents containing different hydrogen bond acceptor (HBA) capacities. The nucleation behavior of ERT was explained by modified Sangwal’s theory. In order to further uncover the effect of interaction mechanism between solvent and solute molecules on the nucleation rate of ERT, the molecular electrostatic potential surface (MEPS), Hirshfeld surface (HS) analysis, and radial distribution function (RDF) were calculated and analyzed. It was found that the strength of solvent–solute interaction was mainly related to the HBA ability of the solvent: the greater the HBA ability was, the stronger the hydrogen bond between the solvent and solute molecules would be, resulting in more difficulty for the solute to separate from the solvent, which then widens the MSZW and leads to a lower nucleation rate, a smaller critical nucleation size, and a longer induction time. Additionally, the induction time under different supersaturation ratios was measured to analyze the nucleation mechanism of ERT. At a high supersaturation ratio, the nucleation mechanism was homogeneous, while at a low supersaturation ratio, the nucleation mechanism was heterogeneous. The calculated interface energy based on the classical nucleation theory was compared with the interface energy calculated by modified Sangwal’s theory. The two calculated values were in good agreement, which further lay the foundation for the application of modified Sangwal’s theory.
研究领域:
化学工程
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物理化学
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高影响因子
AFRICAN JOURNAL OF BIOTECHNOLOGY
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2017
·Vol. 16
·期 50
·2307-2316
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IF 0
Haiyuan Liu,Shu Han,Liping Xie,Jie Pan,Wei Zhang,Guihua Gong,Youjia Hu
2-C-Methyl-D-erythritol-4-phosphate (MEP) pathway has been extensively employed for terpenoids biosynthesis in Escherichia coli. In this study, to obtain key-enzymes of MEP pathway for squalene production, overexpression of different combination of MEP pathway genes were compared. Squalene production in strain YSS12 with overexpressed dxs, idi and ispA of MEP pathway from E. coli was improved by 71-fold when compared with strain YSS3 which only contained double copy SQS. Analysis of transcriptional levels of MEP pathway genes in engineering strains showed that different squalene production can be attributed to changed transcriptional levels of co-overexpressed genes dxs, idi, ispG and ispA in engineering strains. Furthermore, different E. coli expression hosts were compared for squalene production, among which BL21(DE3) was the best squalene producer. These results illustrate that dxs, idi and ispA of the MEP pathway from E. coli were key-enzymes for squalene production in E. coli. These key-enzymes of MEP pathway could also be applied to other terpenoids production in E. coli.
研究领域:
微生物学
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代谢工程
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生物技术
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PubMed
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yu-Hao Ning,Ye Tan,Chuan-Huang Lin,Qi Li,Lin-Ping Yu,Zhong Cao,Li-Xian Sun,Chuan-Chang Li,Ju-Lan Zeng
Alumina-silica (Al-Si) and Al-Si/exfoliated graphite nanoplatelets (xGnPs) composite aerogels were prepared via a novel epoxide method followed by ambient pressure drying (APD) and heat treatment. Epichlorohydrin (ECH) was applied as proton scavenger to control the hydrolysis of AlCl 3 ·6H 2 O to obtain the composite gel. Then the ring-opening products of ECH acted as drying control chemical additives to prevent the gel from high volume shrinkage during APD and was then removed by heat treatment at 800 °C to obtain composite aerogels. Doping the Al-Si aerogel with xGnPs was in favor of obtaining composite aerogels with high specific area and low volume shrinkage. The specific surface area of the prepared Al-Si/xGnP aerogels could attain 350 m 2 /g with a pore volume of 1.156 cm 3 /g. The synthesized aerogels were then vacuum infiltrated with erythritol (ET) to obtain form-stable phase change materials (FSPCMs). The loading of ET in the prepared FSPCMs attained 90 wt%, and the latent heat storage capacity attained 279 J/g. In addition, the thermal conductivity of the FSPCMs could be enhanced to 49.8 % higher than pristine ET with the help of 0.6 wt% xGnPs, and the supercooling of ET in the FSPCMs could be suppressed to 59 °C. Moreover, the FSPCMs supported by Al-Si/xGnP aerogels possessed greatly enhanced light-to-thermal conversion efficiency than the pristine ET and the Al-Si aerogel supported FSPCM. More importantly, the FSPCMs possessed very good long-term thermal reliability.
研究领域:
材料科学
·
能源工程
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高影响因子
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
·
2019
·
IF 3.488
Biao Feng,Li-Wu Fan,Yi Zeng,Jing-Yu Ding,Xue-Feng Shao
Molecular dynamics (MD) simulations were performed to give insights into the effects of hydrogen bonds (HBs) on the melting process and heat conduction of erythritol as a promising latent heat storage material. First, among four force fields (GAFF, GROMOS, OPLS and CHARMM), the applicability of GROMOS force field was verified by comparing the predicted density and heat capacity of erythritol at various temperatures of interest with the measured values. The microscopic melting process of erythritol was simulated using the interface/NPT method, leading to a predicted melting point of ~394 K that agrees well with the measured value (~392 K). It was demonstrated that the variation of HBs energy associated with changes of molecular structure is the primary contribution to the latent heat. Upon melting, the strong inter-molecular HBs in solid erythritol break off and form weaker intra- and inter-molecular HBs in the liquid phase. In addition, non-equilibrium MD simulations were performed to study the microscopic heat conduction in erythritol molecules and to examine the dependence of the van der Waals (vdW) and Coulomb heat currents on the interatomic distance. It was revealed that the heat transfer capability of HB interactions is better than those of the Coulomb or vdW interactions. In the solid phase, the amount of heat transfer through HBs becomes greater with increasing the number of HBs. The results shed light on a promising approach to improving the latent heat storage capacity and thermal conductivity of erythritol (and other sugar alcohols) by manipulating the number and strength of HBs.
研究领域:
材料科学
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分子动力学
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Xiang Qin,Nianrong Feng,Zhe Kang,Dongying Hu
In this study, two kinds of form-stable multifunctional materials with thermal and electrical response (FPCMs: DP-E7U3-CNT, DP-E7T3-CNT) are composed of wood-based honeycomb-like celluloses micro-framework (DP), carbon nanotubes (CNT), erythritol-urea (E7U3) or erythritol-thiourea (E7T3). In FPCMs, DP acts as a skeleton structure to seal E7U3 and E7T3 and provide more pathways for heat conduction. The CNT acts as an extended surface to further improve thermal conductivity . FE-SEM showed that the honeycomb-like pore structure of DP was completely filled with E7U3, E7T3 and CNT. FTIR and XRD analysis show that there is only a combination of physical interactions between the components of FPCMs. DSC curves and thermal conductivity analysis results show that DP-E7U3-1.5CNT and DP-E7T3-1.5CNT with the mass fraction of carbon nanotubes (1.5 wt%) have the highest latent heat values (230.3 J/g, 272.2 J/g) and thermal conductivity (0.9832 W/(m·K), 0.9363 W/(m·K)). Both DP-E7U3-1.5CNT and DP-E7T3-1.5CNT exhibit high latent heat retention and thermal stability after 100 heating-cooling cycles. In addition, DP-E7U3-1.5CNT and DP-E7T3-1.5CNT show excellent performance in light-heat energy conversion-storage, actual latent heat storage and release, thermal and electrical response performance, which make it has great potential to be multifunctional materials with thermal storage sand electrical response.
研究领域:
材料科学
·
能源存储与转换
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高影响因子
POLYMER BULLETIN
·
2015
·Vol. 73
·期 1
·97-112
·
IF 1.438
Teng Lijing,Nie Wangyan,Zhou Yifeng,Chen Pengpeng
In this paper, a series of star-shaped poly( l -lactide)s (s-PLLA) were synthesized via ring-opening polymerization of l -lactide (LLA) using erythritol as initiator. The structure and properties of s-PLLA were characterized by 1 H NMR, GPC and DSC. Then taking rifampicin (RIF) as the model drug, RIF-loaded s-PLLA microspheres were prepared using an oil-in-water emulsion solvent evaporation method. SEM and size analysis indicated that s-PLLA with high monomer/initiator molar ratios (s-PLLA98 and s-PLLA99) could form regular microspheres with smooth surface and have narrow size distributions, which hold the drugs well. The XRD spectra of the RIF-loaded microspheres demonstrated that s-PLLA and RIF were both in their amorphous state after the encapsulation process, which might be caused by the impediment effect of each other. The in vitro release profiles of the RIF-loaded microspheres showed that the s-PLLA99 microspheres were able to sustain the release of RIF for a considerable period of time (70–80 % within 180 h) and the release profiles of RIF from s-PLLA microspheres followed the Baker–Lonsdale model equation. Therefore, these biodegradable and biocompatible s-PLLA microspheres may find practical applications as drug delivery carriers.
研究领域:
生物材料学
·
药剂学
·
高分子化学
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高影响因子
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