JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Jie Qi,Xiaojiang Li,Xin Lv,Yang Ge,Jinyu Wang,Hongsheng Lu
Wax precipitation leads to destructive harms in the exploitation and transportation of petroleum. Solvent treatments can remove paraffin wax easily but the separation of solvent relying on distillation is admitted inefficient. Aiming at enhancing the separation and recovery performance of paraffin wax, CO 2 -responsive emulsion (SHS/W emulsion) based on switchable hydrophilicity solvents (SHS) is adopted. Since the paraffin wax is dissolved, emulsified, and dispersed by SHS/W emulsion, SHS/W emulsion exhibits better removal performance than SHS. The paraffin wax is recovered effectively upon introducing CO 2 , which attributes to the transformation of SHS from hydrophobic to hydrophilic state. Compared with the SHS system, the recovery of paraffin wax is improved obviously by introducing surfactant Span80. Owing to the deprotonation of SHS by bubbling N 2 and heating, 77.6% SHS is recycled after recovering paraffin wax. Here, the recycled SHS can be used to realize the removal of paraffin wax again. Thus, it is a promising and alternative strategy for realizing the sustainable and rapid removal of paraffin wax in the petroleum industry.
研究领域:
化学工程
·
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2023
·
IF 8.3
Chuang Liu,Ziyang Liu,Kexin Wang,Yuting Sun,Qianying Liu,Xun Sun,Tingting Yan,Qiang Yang,Xinlong Ma,Huan Zhou,Lei Yang
Though acknowledged as the essential material in bone bleeding control with advantages of low cost, excellent malleability and smooth consistency for operation, traditional bone wax is associated with adverse effects such as foreign body reaction, granuloma growth, and bone healing failure. Herein, we presented a novel ready-to-use bone wax (NBW) based on DCPA (CaHPO 4 ) granules (DCPA-G) and modified waxy starch (MWS), proposed to overcome problems of bone wax but preserving its impressive workability in hemorrhage control. Thanks to rheological and adhesive properties of MWS after exposure to water, NBW was found to be cohesive, malleable, water content dependent tissue adhesive and liquid sealing abilities. Moreover, after hardening under humid environment due to the interaction between MWS and DCPA-G, NBW exhibited compressive strength that is comparable to that of cancellous bone. After smeared to defect model, water leakage was avoided by NBW. Besides, this material showed superior hemostasis and osteogenesis ability over traditional bone wax in vitro . Simultaneously, in vivo tests confirmed the efficiency of NBW in bleeding control and bone regeneration, indicating it a promising candidate in bleeding bone treatment.
研究领域:
生物材料
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组织工程
·
骨科
·
止血
·
骨再生
✓ 已验证
DOI
高影响因子
PETROLEUM CHEMISTRY
·
2024
·Vol. 64
·期 2
·297-308
·
IF 1.3
Han Yating,Xia Xia,Peng Zexuan,Xiao Yang
Abstract To address the limitations of the existing catalytic hydrogenation and sulfuric acid sulfonation intended to remove aromatic hydrocarbons from liquid paraffin oils, the adsorption method was chosen for the adsorptive separation of phenanthrene, a typical aromatic hydrocarbon, from liquid paraffin oils. A zeolite imidazolate framework-8 (ZIF-8) precursor was firstly prepared, and then ZIF-8-derived porous carbon (ZDPC) adsorbents were obtained using different temperatures of carbonization of the precursor under nitrogen atmosphere; these adsorbents were then used for the adsorption and separation of phenanthrene from liquid paraffin oils. The experiment showed that the maximum specific surface area of a ZDPC adsorbent could reach 1458 m 2 /g at 900°C. However, the total pore volume and adsorption capacity of ZDPC porous carbon were maximal at the carbonization temperature of 800°C (1.59 cm 3 /g and 931 mg/g, respectively). The obtained results showed that an increase in the specific surface area of the adsorbent did not necessarily enhance the adsorption performance. However, compared with the specific surface area of the adsorbent, its adsorption performance is improved in the case of larger pore structures. Therefore, the pore structure of the adsorbent has a very important influence on the adsorption performance. The results of kinetic and thermodynamic studies showed that the pseudo-second-order model could better explain the adsorption process of ZDPC on phenanthrene, while the intra-particle diffusion model revealed that the adsorption mechanism represented a continuous three-stage process.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Xijuan Tu,Chunping Du,Yuchang He,Ji Yang,Jiaxu Chen,Qian Jin,Lingfei Xie,Yuqing Zuo,Shaokang Huang,Wenbin Chen
The methodology of sugaring out–assisted liquid–liquid extraction (SULLE) coupled with high-performance liquid chromatography–fluorescence detection was devised for quantifying bisphenol A (BPA) and bisphenol B (BPB) in beeswax. The effectiveness of SULLE was methodically explored and proved superior to the salting out–assisted liquid–liquid extraction approach for beeswax sample preparation. The analytical performance underwent comprehensive validation, revealing detection limits of 10 μg/kg for BPA and 20 μg/kg for BPB. The method developed was employed to analyse commercial beeswax (n = 15), beeswax foundation (n = 15) and wild-build comb wax (n = 26) samples. The analysis revealed BPA presence in four commercial beeswax samples and three beeswax foundation samples, with the highest detected residue content being 88 ± 7 μg/kg. For BPB, two beeswax foundation samples were positive, with concentrations below the limits of quantification and 85 ± 4 μg/kg, respectively. No bisphenols were detected in wild-build comb wax. Furthermore, the bisphenol removal efficacy of two recycling methods—boiling in water and methanol extraction—was assessed. The findings indicated that after four recycling cycles using water boiling, 9.6% of BPA and 29.2% of BPB remained in the beeswax. Whereas methanol extraction resulted in approximately 7% residual after one recycling process. A long-term study over 210 days revealed the slow degradation of bisphenols in comb beeswax. This degradation fitted well with a first-order model, indicating half-lives (DT 50 ) of 139 days for BPA and 151 days for BPB, respectively. This research provides the first report on bisphenol contamination in beeswax. The low removal rate during the recycling process and the gradual degradation in beeswax underscore the significance of bisphenol contamination and migration in bee hives along with their potential risk to pollinators warranting concern. Furthermore, the developed SULLE method shows promise in preparing beeswax samples to analyse other analytes.
研究领域:
环境科学
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分析化学
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生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Yifeng Chai,Ang Li,Su Chit Wai,Congcong Song,Yaoyao Zhao,Yuquan Duan,Baiqing Zhang,Qiong Lin
Cuticular wax chemicals differ among fruit cultivars and contribute to storage ability. However, wax analysis in apple cultivars, particularly during storage, has not been described. In this work, the chemicals and crystal structures of cuticular wax in 10 apple cultivars were analyzed to observe wax functions in apple during storage. Results showed that alkanes and primary alcohols decreased while fatty acids increased in stored fruits of all cultivars compared with the fruits before storage. Terpenoids , aldehydes, and phenols were observed in stored fruits but not in the fruits before storage in all cultivars except ‘Red Star’ fruit. The weight loss rate was significantly correlated with six components including C13 alcohol, C14 alkanes, total alkanes, total wax, C13 alkanes and C54 alkanes in 10 cultivar apple fruits during storage. Our findings indicate that the total wax, particularly alkanes, in the peel of apple fruits is essential for storage and quality control.
研究领域:
植物学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Agriculture-Basel
·
2019
·Vol. 9
·期 12
·250
·
IF 0
Hua Huang,Yueming Jiang
This study comprehensively analysed the chemical composition of the cuticle in pitaya fruits. The total coverage amount of the waxes versus cutin monomers accumulated at a ratio of 0.6, corresponding to masses per unit of 30.3 μg·cm−2and 50.8 μg·cm−2, respectively. The predominant wax mixtures weren-alkanes in homologous series of C20–C35, dominated by C31and C33; as well as triterpenoids with an abundant amount of uvaol, lupenon, β-amyrinon, and β-amyrin. The most prominent cutin compounds were C16- and C18-type monomers, in which 9(10),16-diOH-hexadecanoic acid and 9,10-epoxy-ω-OH-octadecanoic acid predominated, respectively. The average chain length (ACL) of aliphates in pitaya fruit cuticle (30.5) was similar to that estimated in leaf waxes, and higher than that in most of the fruit and petal waxes that have been reported. We propose that the relatively high ACL and wax/cutin ratio might enhance the cuticular barrier properties in pitaya fruit cuticle to withstand drought.Keywords:pitaya fruit;cuticle;wax;cutin;ACL
研究领域:
植物科学
·
农业化学
✓ 已验证
产品关联
DOI
Journal of Low Power Electronics and Applications
·
2018
·Vol. 8
·期 3
·32
·
IF 0
Peiyuan Ji,Yi Xi,Chengshuang Zhang,Chuanshen Wang,Chenguo Hu,Yuzhu Guan,Dazhi Zhang
Porous materials have superior electrochemical performance owing to its their structure, which could increase the specific and contact area with the electrode. The spinel Li4Mn5O12has a three-dimensional tunnel structure for a better diffusion path, which has the advantage of lithium ion insertion and extraction in the framework. However, multi-space spherical materials with single morphologies are rarely studied. In this work, waxberry-like and raspberry-like nanospheres for Li4Mn5O12have been fabricated by the wet chemistry and solid-state methods for the first time. The diameter of a single waxberry- and raspberry-like nanosphere is about 1 μm and 600 nm, respectively. The specific capacitance of Li4Mn5O12was 535 mF cm−2and 147.25 F g−1at the scan rate of 2 mV s−1, and the energy density was 110.7 Wh kg−1, remaining at 70% after 5000th charge-discharge cycles. Compared with raspberry-like nanosphere Li4Mn5O12, the waxberry-like nanoporous spinel Li4Mn5O12shows the better electrochemical performance and stability; furthermore, these electrochemical performances have been improved greatly compared to the previous studies. All these results indicate that the waxberry-like nanoporous spinel Li4Mn5O12could provide a potential application in high performance supercapacitors.Keywords:supercapacitors;Li4Mn5O12;waxberry-like nanosphere;high performance
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
Gels
·
2023
·Vol. 9
·期 4
·317
·
IF 4.6
Linlin Xie,Xiaoxu Wu,Guichao Wang,Yury M. Shulga,Qiong Liu,Ming Li,Zhi Li
To address the leakage issue of paraffin phase-change materials in thermal management, a monolithic MTMS-based silica aerogel (MSA) is employed to encapsulate paraffin through a facile impregnation process. We find that the paraffin and MSA form a physical combination, with little interaction occurring between them. The prepared no-leakage paraffin/MSA composites have a density of 0.70 g/cm3and exhibit good mechanical properties and nice hydrophobicity, with a contact angle of 122°. Furthermore, the average latent heat of the paraffin/MSA composites is found to reach up to 209.3 J/g, about 85% of the pure paraffin’s latent heat, which is significantly larger than other paraffin/silica aerogel phase-change composite materials. The thermal conductivity of the paraffin/MSA remains almost the same as that of the pure paraffin (~250 mW/m/K), without any heat transfer interference from the MSA skeletons. All these results indicate that MSA can effectively serve as a carrier material for encapsulating paraffin, which is beneficial for expanding the applications of MSAs in thermal management and energy storage.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 15
·7293
·
IF 4.9
Yiqing Luo,Min Guo,Lei Hu,Jiaxin Yang,Junyu Xu,Muhammad Rafiq,Ying Wang,Chunsong Cheng,Shaohua Zeng
Viticis Fructus (VF), a fruit known for its unique flavor profile and various health benefits, demonstrates substantial quality variations depending on its area of production. Traditional methods of production area verification based on internal compound analysis are hampered by a number of technical limitations. This investigation systematically characterized the cuticular wax composition of VF sample from a diverse variety of production areas. Quantitative analyses were conducted to evaluate the spatial distribution patterns of the wax constituents. Significant regional variations were observed: Anhui sample exhibited the highest total wax content (21.39 μg/cm 2 ), with n-alkanes dominating at 76.67%. High-latitude regions showed elevated triterpenoid acid levels, with maslinic acid (0.53 μg/cm 2 ) and ursolic acid (0.34 μg/cm 2 ) concentrations exceeding those of their low-latitude counterparts by four- and three-fold, respectively. Altitudinal influence manifested in long-chain alcohol accumulation, as triacontanol reached 0.87 μg/cm 2 in high-altitude sample. Five key biomarkers demonstrated direct quality correlations: eicosanoic acid, n-triacontane, dotriacontanol, β-amyrin, and α-amyrin. This study established three novel origin identification protocols: single-component quantification, multi-component wax profiling, and wax ratio analysis. This work not only reveals the latitudinal dependence of VF wax composition, but also provides a scientific framework for geographical authentication. Our findings advance wax-based quality evaluation methodologies for fruit products, offering practical solutions for production area verification challenges in food raw materials.
研究领域:
食品科学
·
分析化学
·
植物生物化学
·
地球化学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENTIA HORTICULTURAE
·
2024
·
IF 3.9
Xuan Wan,Xin Lin,Yun Zhang,Dengcan Luo,Junsen Peng,Hua Huang,Xiaochun Ding,Xiaoqing Dong
The occurrence of chilling injury is closely related to changes in wax. In this study, we investigated the relationship in plum fruit between wax presence (CK) and removal of epicuticular wax (REW) based on micromorphology and metabolomics. The results showed that wax reduced the incidence of chilling injury in plum fruit and slowed down the rate of loss of fruit firmness, and that the abundant wax structure not only protected the epidermal cells but also inhibited high-intensity respiration of the fruit. The correlation analysis between wax components and chilling injury illustrated that triterpene components were positively correlated with the occurrence of chilling injury. In summary, the present study revealed that wax components were involved in regulating chilling injury in plums, which provides a research idea to delay and reduce the occurrence of chilling injury in plums.
研究领域:
植物学
·
食品科学
✓ 已验证
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Mengjing Zhou,Bin Li,Aolin Wu,Zhigang Hu,Jizhen Liu,Ying Wang,Haiying Liu
This study utilized beeswax and k-carrageenan as gelling agents to prepare oleogels and hydrogels, respectively. The amalgamation of the two gels in frozen water led to the formation of bigels. With the goal to improve the consistency and long-lasting nature of the bigel, starch was added to the mixture. A study was then done to evaluate how the addition of starch affected the thermal, mechanical, and rheological properties, as well as the capacity of the bigel to withstand freeze-thaw resilience. The results indicated that the bigel without starch exhibited a melting temperature comparable to that of the oleogel. However, the inclusion of starch resulted in a decrease in the melting temperature to 44.88 °C, accompanied by a wider endothermic peak. The enthalpy of the bigel with additional starch dramatically increased to 42.227 J/g. The addition of starch significantly improved the mechanical characteristics of the bigel, resulting in an average increase in hardness of 32.3% and Young's modulus of 54.2%. Furthermore, the bigel demonstrated exceptional freeze-thaw stability, exhibiting an average enhancement of around 5% when compared to the equivalent without starch. The use of hydrogel enhanced the thermal durability of the bigel, preventing structural collapse when the ambient temperature rose. This study proposes a method to produce starch bigels that possess excellent freeze-thaw stability and rheological properties.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Shi-dong Zhou,Zhen-hao Ren,Yi-song Yu,Yang Liu,Xiao-fang Lv,Hui Du
During the operation of deep-sea pipelines, the accumulation and deposition of hydrates are important reasons for pipeline blockage. The current main measure to solve the hydrate plugging problem is the addition of low-dose inhibitors (LDHIs), but it is not yet known whether the precipitation of wax crystals will affect their effectiveness. Therefore, in this study, the hydrate cohesive force within the wax-free/wax-containing system was directly measured by using a micromechanical force device (MMF) and the reasons for the change in cohesive force were analyzed from a morphological point of view. The results showed that glycine was effective in reducing the cohesion between hydrate particles in both wax-free/wax-containing systems and still exerted the effect of antiagglomeration agent (AA) at very low concentrations (as low as 0.10 wt %). Moreover, the optimum concentration of glycine was 0.50 wt %. At this concentration, the cohesive force decreased from 8.54 to 7.07 mN/m in the wax-free system, a decrease of about 17.2%, while the cohesive force decreased from 5.94 to 2.15 mN/m in the wax-containing system, a decrease of about 63.8%. By observation of the morphology of the hydrate particles, the presence of glycine was found to reduce the volume of the liquid bridge by changing the surface roughness and wettability of the particles, thereby reducing the cohesive force. And when wax was contained in the system, the wax further reduced the wettability by adsorbing on the surface of the hydrate particles. However, under certain AA conditions, the increase in wax concentration (from 0.1 to 0.3 wt %) resulted in the free water inside the hydrate being more likely to form liquid bridges with the surrounding particles, thus weakening the effect of AA. This work analyzes the effect on cohesive force in the simultaneous presence of LDHIs and wax from a morphological point of view, which is beneficial in providing more insights into securing safe hydrate flow management.
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）