CHINESE JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 4
Liu Xue,Li Hang,Dai Jun-Xiang,Tian Guo-Qiang,Chen Si-Chong,Wu Gang,Wang Yu-Zhong
Poly(lactic acid) (PLA), a bio-based polymer, is considered to be a sustainable alternative to conventional petroleum-based plastics. However, owing to its widespread use and relatively slow degradation rate in water, PLA still poses potential environmental pollution risks after being discarded. The efficient chemical recycling of PLA represents an attractive approach to addressing both resource reuse and environmental pollution challenges caused by its waste. Hydrolysis is the predominant method of industrial recycling. However, because PLA is insoluble in water, efficient heterogeneous hydrolysis requires high-temperature and high-pressure conditions. In this study, an efficient homogenous hydrolysis method capable of simultaneously dissolving PLA and calcium hydroxide (Ca(OH) 2 ) was developed. Suitable solvents for this method were screened, and it was found that PLA hydrolysis using dioxane and 1,4,7,10,13-Pen-taoxacyclopentadecane as solvents achieved conversion rates of 93% and 90%, respectively, within 2 h at room temperature. Notably, the hydrolysis product, calcium lactate, precipitated as a solid from the solvent and therefore self-separated from the reaction solution. The solvent, acid/base conditions, water content, and depolymerization kinetics were investigated. Compared with previously reported hydrolysis methods, the enhanced efficiency observed in this study can be attributed to the concurrent solvation of PLA and Ca(OH) 2 , which maintains homogeneity throughout the reaction process. Additionally, this method facilitates closed-loop recycling of PLA and is compatible with the highly selective recovery of PLA from various types of PLA products.
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
JOURNAL OF FOOD ENGINEERING
·
2020
·
IF 4.499
Shengjian Xiao,Zihe Li,Qinmei Xiong,Chongde Wu,Jun Huang,Rongqing Zhou,Yao Jin
This work explored the feasibility of sodium lactate as a novel draw solute to conduct the forward osmosis (FO) process in the field of food processing. As a common low-cost food addictive, sodium lactate is non-toxic and shows high osmotic pressure . Based on this knowledge, the results of this work further revealed the combinative effect of osmotic pressure and viscosity of sodium lactate solution on the FO performance. The effect of draw solution concentration, membrane orientation and temperature on the FO performance were also investigated. The results revealed that a maximal average water flux of 56 LMH was reached during the FO experiments with sodium lactate as draw solute. Taking into account the average water flux and the reverse solute flux, 7.1 M was the optimal concentration of the sodium lactate solution for FO process. The application of such draw solution into the concentration of sugar solution and orange juice then validated its promising performance in terms of efficiency, food quality preservation and membrane regeneration.
研究领域:
食品科学
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生物工程
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
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2022
·
IF 9.231
Wenting Deng,Dan Zhou,Jiaxing Li,Jianxian Zheng,Zhongkai Zhou
Lactisole is a potent sweetness inhibitor for alleviating the over-sweet problem in food. For investigating the sweetness inhibition mechanism of lactisole, seven derivatives were synthesized and their structure was characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance and mass spectrometry for confirming the modification on aromatic ring and carboxylic acid. An evaluation method for sweetness inhibition was developed using the electronic tongue, and the results revealed that the introduction of hydrophobic groups onto aromatic ring of lactisole did not improve the inhibitory activity. A certain branching and length of carbon chain between the aromatic ring and the carboxylic group were presumably important for inhibitory function. The plausible interpretation is that the structured carbon chain may influence the spatial position of carboxylic group during the interaction between the inhibitors and the receptor. A potent mechanism for regulating sweetness inhibition of the compounds based on their corresponding structural characteristics is proposed.
研究领域:
食品科学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jihan Yang,Airong Li,Junping Guo,Zhihong Wang
The control of sulfur dioxide (SO 2 ) emissions from natural gas purification processes has become an urgent environmental priority due to increasing regulatory pressures and public concerns over air pollution. In this study, a series of 1-methylimidazolium-based ionic liquids ([MIM]-ILs) were synthesized and structurally characterized, followed by systematic evaluation of their SO 2 absorption capacities under simulated flue gas conditions (2000 ppm SO 2 ). Among them, [MIM]Lac showed the relatively better absorption performance, reaching a saturated capacity of 1.986 mol SO 2 per mol IL at a low concentration of 2000 ppm SO 2 . The regeneration experimental results demonstrated that [MIM]Lac achieved an optimal SO 2 removal efficiency of 99.71 % at 85 °C, indicating excellent thermal responsiveness. Even after 10 consecutive absorption-desorption cycles, [MIM]Lac retained 92.52 % of its initial absorption capacity, highlighting its outstanding cyclic stability and thermal durability. The insights based on FT-IR and 1 H NMR analyses revealed that SO 2 absorption by [MIM]Lac primarily involved the reversible chemical interactions between SO 2 and the lactate anion, particularly at the S O and S−O sites. This study provides a practical strategy for designing efficient SO 2 absorbents and the development of ionic liquid-based desulfurization systems.
研究领域:
环境化学
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大气污染控制
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绿色溶剂
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工业生态学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMBUSTION SCIENCE AND TECHNOLOGY
·
2022
·
IF 2.133
Shibin Nie,Haoran Zhang,Chao Han,Jiayi Li,Jinian Yang,Hong Zhang,Guanglong Dai,Hailin Su
The traditional gel foam materials have achieved certain effects in preventing coal fire. However, the traditional gel foam materials commonly use chemical compounds which cause harm to the environment. Therefore, based on biomass materials such as low methoxyl pectin (LMP), calcium L-lactate (Ca-L), and biomass compound foaming agent (BF), a new eco-friendly gel foam (LMP-Ca) was prepared. The foaming performance, gelling time, stability, coal oxidation inhibition and fire extinguishing performances of LMP-Ca were systematically studied. The study shows that the gelling time of LMP-Ca with 1.2 wt% LMP, 0.075 wt% Ca-L and 0.03 wt% BF is 10 min and the half-life is up to 216 h. Moreover, the LMP-Ca has excellent film-forming performance, and the isolation film with thickness up to 2.5 mm can be formed on the surface. The coal oxidation inhibition experiment shows that LMP-Ca can effectively delay the oxidation rate of coal with the temperature rising, and the inhibition rate of CO is 72.1% at 180°C. The fire extinguishing experiment shows that the temperature of the coal treated by LMP-Ca decreases rapidly from 960 to 60°C in 20 min and to 30°C in the following 110 min without the reignition phenomenon. The result indicates that LMP-Ca has excellent fire extinguishing performance. This study is helpful to develop eco-friendly coal fire prevention and control technology, and overcome the shortcomings of traditional gel foam on environmental pollutions.
研究领域:
能源与环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2013
·
IF 2.004
Shidong Tian,Shuhang Ren,Yucui Hou,Weize Wu,Wei Peng
Densities and viscosities of 1,1,3,3-tetramethylguanidium lactate ([TMG]L) (1) + H2O (2) with different compositions were determined at temperatures from (303.15 to 328.15) K. Densities of [TMG]L (1) + H2O (2) decrease with the increase of temperature. However, when the mole fraction of water is lower than 0.5, the water content does not have an obvious influence on the density of [TMG]L. When the mole fraction of water is greater than 0.5, the densities of [TMG]L (1) + H2O (2) decrease obviously with further increasing the mole fraction of water. Viscosity of [TMG]L decrease dramatically with the increase of temperature and the water content. Excess molar volumes (VE) and viscosity deviations (Δη) of the binary mixtures were calculated by the experimental data and fitted to the Redlich–Kister equation with four parameters. The result shows that the values of VE and Δη for the binary mixtures are negative over the whole composition range and temperatures from (303.15 to 328.15) K. The negative of the excess properties indicates a strong interaction between the ionic liquid and water. The partial molar volumes (V̅i), excess partial molar volumes (V̅iE), Gibbs energy of activation for viscous flow (ΔG*), and excess Gibbs energy of activation for viscous flow (ΔG*E) of the binary mixtures were also calculated based on the densities and viscosities data. Besides, the Jouyban–Acree model was used to correlate the densities and viscosities of the binary mixtures with respect to the mixture composition and temperature simultaneously.
研究领域:
物理化学
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热力学
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化工工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Ying Zeng,Xinlu Li
Biomass-activated carbon is generally used in ultra-clean rooms to remove sulfur dioxide (SO 2 ) molecular impurities. However, its high air resistance and excessive chemical residues needs resolution. In this study, we have developed millimeter-sized mesoporous carbon beads (MCBs) using a silica sol and reverse-phase suspension polymerization. The microstructure of MCBs was characterized by various techniques, including X-ray diffraction, Raman spectroscopy and scanning electron microscopy. The MCBs were categorized into three distinct groups based on particle size and were loaded with tetramethyl guanidine lactate (TMGL) or 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]), respectively. It was found that the MCBs exhibit a perfect spherical shape, smooth surface, high strength, and effectively reduce air resistance. Notably, the MCBs loaded with [EMIM][OAc] demonstrated a remarkable SO 2 adsorption capacity of up to 36.7 mg/ml, and the feasibility to remove SO 2 as a new absorption material for ultra-clean room.
研究领域:
环境科学
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材料科学
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化学工程
·
吸附技术
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Qiuxia Fan,Qian He,Ting Zhang,Wei Song,Qinglin Sheng,Yahong Yuan,Tianli Yue
This study aimed to explore the antibiofilm activity and possible mechanism of lactobionic acid (LBA) against Salmonella enterica subsp. enterica serovar Typhimurium ( S. Typhimurium). The minimum inhibitory concentration (MIC) of LBA against S. Typhimurium was 8 mg/mL. At sub-inhibitory concentrations (SICs), LBA inhibited the biofilm formation of S. Typhimurium on glass surface, as evidenced by the results of microscope observations. Crystal violet staining assay and cell enumeration assay revealed that LBA was also effective in inhibiting the biofilm formation on stainless steel surface. Moreover, LBA repressed the swimming and swarming motility of S. Typhimurium and also reduced the production of extracellular polysaccharide and protein during biofilm formation. Reverse transcription quantitative real-time polymerase chain reaction (RT-qPCR) analysis revealed that LBA down-regulated the expression of genes involved in S. Typhimurium biofilm formation. These data suggested that LBA exerted an inhibitory effect on S. Typhimurium biofilm formation through interfering with cell motility, extracellular polysaccharide and protein production as well as expression of biofilm-related genes . Additionally, LBA at 4MIC and 8MIC had the efficacy to inactivate S. Typhimurium biofilms formed on stainless steel and chicken meat.
研究领域:
微生物学
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食品科学
·
分子生物学
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Chunhua Zhang,Bowen Li,Xiang Gao,Wei Xiao,Mingfang Chen,Qilong Bian
This work demonstrates a wireless electroenzymatic platform using carbon microsphere electrodes co-immobilized with a rhodium catalyst and lactate dehydrogenase (LDH) for integrated NADH regeneration and pyruvate-to-L-lactate conversion in a bipolar electrochemical system. The 3D "aggregate reactor" architecture, functionalized via diazonium grafting, Rh coordination, and covalent enzyme coupling, enables spatial coupling of cofactor recycling and biocatalysis, while HPLC revealed a L-lactate production rate of 0.04 mM cm-2 h⁻¹ under 12.5 V cm⁻¹ with a plenty of carbon beads attributed to enhanced mass transport. This wireless, scalable design eliminates wiring constraints and offers modular adaptability for sustainable synthesis of chiral chemicals.
研究领域:
电化学
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催化
·
生物催化
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材料科学
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化学工程
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分析化学
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可持续化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Xiudan Wang,Yilin Wang,Chen Guo,Xiaoyun Zhang,Ying Wang,Liangtao Lv,Xiaokun Wang,Manman Wei
In this study, a paper-based enzyme biosensor for hypoxanthine (Hx) was developed, enabling visual and one-step fish freshness detection. Xanthine oxidase and horseradish peroxidase were immobilized on nitrocellulose membranes with 3,3′,5,5′-tetramethylbenzidine to output the colour signal. Chitosan oligosaccharide lactate-modified nitrocellulose membranes entrapped the dual-enzyme system and exhibited excellent microfluidic aggregation effect. The developed enzyme biosensor produced a linear response of 0.01–0.16 mmolL -1 with a detection limit of 8.22 μmolL -1 , and was selective for Hx with recoveries of 96.13–103.11 % for fish samples. These biosensors were attached directly to the surface of fish samples and the colour was revealed within 3 min. Colour signals can be judged by the naked-eye to distinguish between fresh and spoiled fish samples and analyzed by a smartphone for quantitative analysis. The biosensor shows great potential as a powerful pattern- and reagent-free device for on-site freshness evaluation of fish.
研究领域:
生物传感器
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食品科学
·
分析化学
·
微流控技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 3
·1-8
·
IF 6.232
Sun Xiaodong,Chen Cheng,Li Xiaoqi,Du Yingxiang,Zhao Shiyuan,Feng Zijie
A new bilayer chiral stationary phase for use in open tubular capillary electrochromatography (OT-CEC) system is described. Gold nanoparticles were modified with L-cysteine, with a tetramethylammonium lactobionate ionic liquid that acts as the chiral selector. The gold nanoparticle-coated column provides good enantioseparation and favorable reproducibility. Compared with an uncoated separation system, the column developed displays improved separation of the racemic β-blockers propranolol, esmolol, bisoprolol and sotalol (resolutions of enotiomers are 6.29, 6.11, 6.12 and 6.02, respectively). The materials and coatings were characterized by scanning electron microscopy and transmission electron microscopy. The main driving forces (CEC and electro-osmotic flow) were studied to evaluate the variation of the immobilized columns. The effects of buffer pH value, concentration of chiral selector, type of organic modifier and applied voltage were optimized. Satisfactory relative standard deviations were achieved in run-to-run, day-to-day and column-to-column experiments.
Schematic preparation of a capillary column with bilayer chiral selectors coated gold nanoparticles. This novel OT-CEC system was applied for separation of four basic racemic β-blockers.
研究领域:
分析化学
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药学
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纳米技术
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色谱学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）