CELLULOSE
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2025
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IF 4.8
Zhao Huifang,Zhang Feiyang,Xiong Fangtao,Yang Jun,Fu Bingqing,Sha Lizheng,Yuan Tianzhong,Guo Daliang,Li Jing
In order to obtain eco-friendly high barrier food packaging paperboard, cationic starch (CAS) was used as the emulsifier to prepare carnauba wax (CW) emulsion, and water and oil resistant food packaging paperboard was fabricated via layer-by-layer rod coating with chitosan (CS) solution and the prepared CAS/CW emulsion. The characteristics of CAS/CW emulsions and the effect of coating process on the water and oil resistance of coated paperboard were investigated. The results showed that the CAS/CW emulsions were composed of spherical particles with a slight surface depression, which showed a good stability and had a particle size distribution ranging from 500 to 2000 nm depending upon the CAS concentration and CW dosage. The single layer coated paperboard with CAS1/CW10 emulsion (10 g CW was added into 40 ml 1% CAS solution) had an excellent water resistance and a poor oil resistance, and the single layer coated paperboard with 2.5% CS solution had an excellent oil resistance and a poor water resistance. When a 2.5% CS solution coating was followed by a CAS1/CW10 coating, the double layer coated paperboard had a Cobb60 value of 4.5 g/m 2 and a Kit rating of 12/12, showing excellent water and oil resistance, as well as excellent self-cleaning ability, thermal stability and heat sealability. Graphical abstract
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DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Shikun Tong,Yuemeng Ren,Kele Yan,Yanxin Jin,Pengfei Li,Jianbo Zhang,Zhiyuan Wang
The coupling deposition and plugging caused by hydrate formation and wax precipitation during the development of deep water natural gas resources bring new industrial challenges and theoretical difficulty. We designed a single-pass pipeline with two types to investigate deposition behavior and systematically performed the coupling deposition and plugging of hydrate and wax experiments in gas–liquid annular flow . The experimental results illustrate that the single solid phase of hydrate is covered layer sheet deposition, while the coupling solid phase of hydrate and wax is bulk aggregations arch bridge deposition. Meanwhile, the natural eddy zone in reducing pipeline accelerates coupling solid particles deposition. Our finds provided the first knowledge on the double effect that wax crystals inhibit particles adhesion and gel network increases aggregations arch bridge blockage. For the low water content in emulsion system, the gel network provides gathering place for hydrate particles, and the arch bridge structure formed by aggregations accelerates the pipeline blockage. The plugging time is shortened by up to 72.6% with the wax concentration increase from 0 wt% to 3 wt%. For the high water content in emulsion system, the majority of wax crystals adsorbed on the hydrate particles and reduce particles cohesion force, which increase the plugging time. Combined with the microscopic morphology evolution perspective of hydrate particles coupled wax, the coupling deposition of hydrate and wax in gas–liquid annular flow has four stages: gas–liquid flow, coupling solid phase formation, coupling solid phase deposition and sloughing, and coupling solid phase plugging. This study can provide theoretical support and design basis for flow assurance program of deep water gas fields and low temperature natural gas transportation pipelines.
研究领域:
石油工程
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化学工程
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DOI
高影响因子
Foods
·
2024
·Vol. 13
·期 16
·2589
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IF 4.7
Xiaohan Chen,Xiaoxia Chen,Daoming Li,Weifei Wang
The purpose of this study was to substitute shortening with olive diacylglycerol oil/candelilla wax (OCW)–olive diacylglycerol stearin (ODS) oleogels and evaluate their impact on starch digestibility in cookies. The in vitro digestibility study confirmed that the OCW/ODS–based cookies exhibited a notable enhancement of 14.6% in slowly digestible starch (SDS) and an increase of 3.14% in resistant starch (RS) values when contrasted with shortening cookies. The XRD pattern indicated that the existence of ODS may improve the formation of complexes between lipids and amylose. The DSC analysis demonstrated that the incorporation of ODS led to a remarkable rise in enthalpy alteration, escalating from 0.90 to 437.70 J/g, suggesting an improved ability to resist gelatinization. The FTIR spectra suggested that the incorporation of ODS might strengthen interactions between the hydrogen bonds and form the short–range ordered structure in OCW/ODS–based cookies. Overall, these results indicated that incorporating OCW/ODS–based oleogels could serve as a feasible substitute for conventional shortening in cookies with decreased starch digestibility.
研究领域:
食品科学
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营养学
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材料科学
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DOI
PubMed
高影响因子
PEST MANAGEMENT SCIENCE
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2025
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IF 3.8
Huihui Wang,Yuhang Du,Aying Wen,Shaofeng Yuan,Hang Yu,Weirong Yao
BACKGROUND Cuticular wax is vital for preventing pesticide migration into fruit tissue, yet interactions between pesticides and wax components remain unclear. This study investigated the adsorption of non-systemic pesticide chlorothalonil on grape cuticles and dewaxed grape cuticles to quantify wax contributions and elucidate the interaction between chlorothalonil and wax components. RESULTS The wax was distributed on the surface of the grape cuticles with higher lipophilicity. The distinct chlorothalonil adsorption behaviors on grape cuticles (featuring heterogeneous and multilayer chemical adsorption) and dewaxed grape cuticles (featuring homogeneous and monolayer physical adsorption) were attributed to the presence of wax. Wax accounted for 40.36% of the total grape cuticle content and contributed 67.47% to the chlorothalonil adsorption capacity, indicating that wax was the main site for chlorothalonil adsorption. Through wax analysis and molecular docking, hexadecanoic acid and octadecanoic acid were considered as the major contributors, primarily engaging in hydrophobic interactions with chlorothalonil. Furthermore, gradual fluorescence quenching of chlorothalonil was observed with increasing concentrations of these acids (both below saturation concentrations, r = 0.99), confirming the intermolecular interaction between chlorothalonil and these acids. CONCLUSION The study clarified the residue behavior in fruit cuticles and the interaction between pesticides and cuticular wax. The findings provide important insights for optimizing pesticide application strategies to reduce pesticide residues in fruits and improve pest management efficiency. © 2025 Society of Chemical Industry.
研究领域:
环境科学
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农业化学
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植物生理学
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分析化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2024
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IF 4.1
Xin Lv,Shi Shen,Huiyong Liang,Yanzhen Liu,Haiyuan Yao,Rui Qin,Haihong Chen,Yang Ge,Peng Xiao
Throughout the development of deepwater oil and gas fields, the occurrence of mixed deposition involving wax and hydrate is a prevalent phenomenon. To understand this process, researchers have explored the kinetics and thermodynamic behavior governing the co-deposition of wax and hydrates. It was observed that the Gibbs free energy change of hydrate increases with increasing pressure, while the entropy change experiences a decrease under heightened pressure conditions. The Gibbs free energy change and entropy change of wax crystal precipitation exhibit an increase with rising wax concentration. In a 100 mL sample of simulated crude oil containing 10 vol% moisture and 2.5 wt% wax, the rate of solid phase deposition measures 0.1126 cm 3 /min when the temperature drops from 61 °C to 2 °C. The results exhibit that the dispersion of wax crystals within the oil phase serves to inhibit aggregation phenomenon during hydrate formation and can be effectively used to inhibit hydrate deposition.
研究领域:
石油工程
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化学工程
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DOI
高影响因子
TRIBOLOGY INTERNATIONAL
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2020
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IF 4.271
Saisai Huang,Bingli Pan,Mengxin Xie,Jiayu Gao,Guangming Zhao,Yumiao Niu,Honggang Wang
In this work, monomer casting nylon-6 (MCPA6)/melamine foam (Me)/graphene oxide (GO)/paraffin wax (PW) composites were synthesized using Me foam as a three-dimensional template and adsorbing GO and PW on the Me foam skeleton. The microstructure and tribological behaviors of the MCPA6/Me/GO/PW composites were determined and the interaction of PW with GO were theoretical investigated. The results showed that the addition of both GO and PW significantly improved the tribological properties of the composites. Compared with pure MCPA6, the friction coefficient and specific wear rate of the composite with the ratio of 2:3.5 (GO to PW) were reduced by 82% and 84%, respectively. The improvement of tribological performance was attributed to the synergistic lubrication and anti-wear effects of PW and GO.
研究领域:
材料科学
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摩擦学
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DOI
高影响因子
CATALYSIS TODAY
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2020
·
IF 5.825
Hong Du,Miao Jiang,Xiuyun Ma,Peifang Yan,Z. Conrad Zhang
The rapid consumption of fossil resources and the grim environmental situation encourage the application of renewable and clean energy resources. Conversion of biomass, which is a kind of renewable, CO 2 neutral as well as abundant reserves carbon containing resource, is significantly important. The production of fuels from biomass by means of gasification and Fischer-Tropsch synthesis is one of the most promising routes for industrial applications. The wax-free liquid fuels synthesis directly from H 2 -deficient syngas similar to bio-gas is highly advantageous for reducing investment and operating cost. Thus, the Mn-promoted meso-ZSM-5 supported cobalt catalyst was applied for the production of wax-free liquid fuels by catalytic H 2 -deficient syngas conversion in this study. The performance of the reaction was influenced obviously by Mn content. The cobalt dispersion increased with the addition of Mn, whereas the reduction degree decreased after Mn doping. Then, the balance between the dispersion and reduction degree led to the change in CO uptake followed a volcanic curve. The catalyst with moderate amount of Mn (1 wt%) had the suitable cobalt particle size and the maximum CO uptake. Thus, the highest CO conversion was obtained over Co-1Mn/meso-ZSM-5 catalyst thanks to its maximum exposed active sites. The appropriate amount of Mn addition also resulted in the decreasing of CH 4 selectivity. The highest space time yield of liquid fuels was acquired over the Co-1Mn/meso-ZSM-5 catalyst from H 2 -deficient syngas conversion under the moderate conditions.
研究领域:
能源化学
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催化反应工程
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DOI
高影响因子
POLYMER
·
2021
·
IF 4.43
Zekun Wang,Xiaoguang Zhang,Yunfei Xu,Guo Chen,Fankai Lin,Hao Ding
Development of low-cost equipment that can store clean energy, such as solar energy, is effective for alleviating environmental pollution. In this study, the shape-stabilized composite phase change materials (PCMs) based on paraffin wax and carbon foam were prepared. The carbon foam prepared from melamine foam had a good pore structure and was used to encapsulate paraffin wax. The latent heat of melting and cooling of composite PCMs were 221.1 J/g and 213.7 J/g, respectively. Even after 100 cycles, it still showed good thermal performance. Meanwhile, the composite PCMs exhibited good light-to-heat conversion efficiencies of 53.94% and 67.43% at light intensities of 200 mW cm −2 and 300 mW cm −2 , respectively. Overall, composite PCMs with excellent thermal performance and cycle stability have application prospects in industries such as construction, solar energy, and battery temperature-control systems.
研究领域:
能源材料
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环境科学
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建筑节能
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Xiaoyi Liu,Feng Hong,Ge Pang,Haiming Cheng,Xiaosong Yu,Hu Wang,Guixia Liu,Dan Li,Xiangting Dong,Jinxian Wang,Wensheng Yu
Novel narrow-band red-emitting K 3 WO 2 F 5 ·2H 2 O:Mn 4+ and its paraffin wax (PW)-coated phosphor (K 3 WO 2 F 5 ·2H 2 O:Mn 4+ @PW) were synthesized via simple co-precipitation method. Optical properties of the phosphors have been systematically analyzed. Meanwhile, the energy transfer process in the phosphor was discussed in detail, which provides a feasible basis for broadening the application range of the phosphor when excited by UV-light. The thermostability of K 3 WO 2 F 5 ·2H 2 O:Mn 4+ sample was analyzed via investigating the temperature-dependent photoluminescence properties. More importantly, the luminescence properties and hydrophobic stability of the phosphors coated with PW were superior to those of K 3 WO 2 F 5 ·2H 2 O:Mn 4+ and K 2 SiF 6 :Mn 4+ . The luminescence intensity of K 3 WO 2 F 5 ·2H 2 O:Mn 4+ @PW decreased by only 24.5% after the phosphor was immersed in water for 360 min. K 3 WO 2 F 5 ·2H 2 O:Mn 4+ @PW was used as red component to fabricate the warm white light-emitting diode, which presents excellent photoelectric parameters Ra = 90.1 and CCT = 3664 K) and remarkable stability in the range of 20–200 mA driving current. These results demonstrated that K 3 WO 2 F 5 ·2H 2 O:Mn 4+ @PW red composition has the ideal application value in WLEDs.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 15
·21476-21486
·
IF 5.164
Yuanlu Xu,Haichao Mu,Xiaoshi Han,Tianjun Sun,Xinfei Fan,Bowen Lv,Zonglin Pan,Yongxin Song,Chengwen Song
Summary Solar interfacial water evaporation is considered as a potential green technology to solve the global shortage of freshwater resources. However, it is still an arduous task to develop a low-cost and efficient solar evaporator with a simple preparation method. Herein, a simple, flexible, and porous polypyrrole-wax gourd (PPy-wax gourd) biomass evaporator was reported for solar evaporation enhancement. Wax gourd had the advantages such as superhydrophilic wettability, massive microporous channels, and easy planting. PPy was a kind of black polymer with excellent light absorption ability, which greatly improved the light absorption of the PPy-wax gourd evaporator within a full spectrum of solar irradiance (300-2500 nm). The PPy-wax gourd evaporator prepared by the perfect combination of wax gourd and polypyrrole realized a superior vapor generation ability (1.57 kg m −2 hours −1 ) with a photothermal conversion efficiency of 77.3% under 1 solar intensity, which was better than some other biomass evaporators developed so far. In addition, the PPy-wax gourd evaporator also exhibited remarkable stability and durability under long-term recycling utilization and harsh environments. Importantly, the PPy-wax gourd evaporator demonstrated prominent wastewater purification capacity and desalination performance for dye wastewater and simulated seawater treatment. Based on these results, this work would offer a new strategy for developing novel biomass thermal evaporators the clean water production.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
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2021
·
IF 1.99
Yanmin Huang,Xiangying Li,Dongmei Mo,Haiyan Yuan,Qiang Hu,Yang Jiang,Chunfang Gan,Yong Chen,Weiguo Li,Rui Lu,Jianguo Cui
Using polyethylene wax (PW) as the coating matrix, the lambda-cyhalothrin-PW nanosuspoemulsion (LC-PW) with a particle size of 80-150nm was prepared through high-speed stirring, hot melt emulsification and ultrasonic dispersion. The formulation and composition of the LC-PW were optimized, the morphology of the LC-PW was analyzed by dynamic light scattering (DLS) and TEM, and the structure of the LC-PW was characterized by UV and IR. The anti-photolysis test showed that LC-PW had a good anti-photolysis performance. Furthermore, LC-PW could sustainably release Lambda-cyhalothrin, which was pH- and temperature dependent. The insecticidal activity analysis in the greenhouse indicated that the toxic strength between LC-PW and LC-SC (lambda-cyhalothrin-suspension concentrate) to Mythimna separata was similar within the same concentration ranges tested, but the insecticidal duration of LC-PW was significantly longer than LC-SC. Thus, the new type of LC-PW with the properties of anti-photolysis and controlled release is suitable for application in the field as a better insecticide.
研究领域:
农药科学
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材料科学
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环境科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING COMMUNICATIONS
·
2023
·
IF 2.5
Yanxiao Chen,Huifen Zhang,Xian Luo,Shiyun Jiao,Baocai Li,Mi Zhang
Crude montan wax (CMW) is a natural wax extracted directly from lignite by organic solvents that can be prepared into deresined montan wax (DMW) by the deresination process and then bleached into refined montan wax (RMW) by an oxidation process. Based on the different requirements for the DMW properties in different applications, a study on effects of the different factors on the deresination rate in CMW and the residual montan resin (MR) content on basic properties of DMW was carried out in this work. It was found that ethyl acetate displays an improved deresination effect, and that time and temperature are the two key factors that affect the CMW deresination rate (ǀ r ǀ > 0.9). With the increase in the residual MR contents in DMWs, the melting point of DMW decreased while its melting range widened, and its friability, acidity and saponification values increased. Gas chromatography-mass spectrometry analysis revealed that DMWs are rich in fatty esters and acids. It is concluded that the differences in their properties are related to the changes in the amount and content of the acids and esters.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）