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Combining Ultra-Turrax and ultrasonic homogenization to achieve higher vitamin E encapsulation efficiency in spray drying

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Particuology 2024年第12期95卷 28-35页

作者： Letícia Siqueira Cristiano Augusto Ballus Eduardo Hiromitsu Tanabe Daniel Assumpção Bertuol Environmental Processes Laboratory(LAPAM) Chemical Engineering DepartmentFederal University of Santa Maria–UFSMAvenida Roraima 1000Santa MariaRS97105-900Brazil Department of Food Science and Technology Federal University of Santa Maria–UFSMAvenida Roraima 1000Santa MariaRS97105-900Brazil

Vitamin E,a soluble antioxidant widely used in the food and pharmaceutical industries,is rich in tocopherols and *** vitamin E molecules are highly sensitive to oxidation,encapsulation is a viable and effective technique for preservation of the properties of Vitamin E and improving its stability during storage,maintaining the nutritional *** this work,the aim was to encapsulate concentrated vitamin E using a combination of Ultra-Turrax and ultrasonication to achieve higher encapsulation efficiency in spray *** the first stage,the vitamin E oil was encapsulated employing only Ultra-Turrax homogenization,with subsequent optimization of spray *** coating materials used were maltodextrin and whey protein *** of the spray drying step evaluated the effects of the drying air temperature(T)and the feed flow rate(Q),to obtain better yields and a high-quality *** the second stage,the use of ultrasonication in an additional homogenization step was evaluated,aiming to further improve the encapsulation *** results showed that the best drying conditions(first stage)were T=180℃ and Q=0.6 L/h,which provided the highest yield(67.73%)and high encapsulation efficiency(73.73%).The microspheres produced had similar properties,with mean diameters ranging from 0.64 to 12.99μ*** the second stage of the investigation,the application of ultrasonication immediately after the Ultra-Turrax homogenization enabled the encapsulation efficiency to be increased to 94.05%,with a yield of 57.54%,using an ultrasonication time of only 7 *** showed that addition of the ultrasonic homogenization step to the process greatly improved the encapsulation efficiency and could be used to produce vitamin E-enriched powder microcapsules by spray drying,with application in the food industry.

关键词： spray drying Vitamin E Microencapsulation Ultra-Turrax Ultrasonication

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A homogenous solid polymer electrolyte prepared by facile spray drying method is used for room-temperature solid lithium metal batteries

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Nano Research 2023年第4期16卷 5080-5086页

作者： Zehao Zhou Tong Sun Jin Cui Xiu Shen Chuan Shi Shuang Cao Jinbao Zhao College of Physics Qingdao UniversityQingdao 266071China Collaborative Innovation Center of Chemistry for Energy Materials State Key Lab of Physical Chemistry of Solid SurfacesState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

The aggregation of inorganic particles with high mass ratio will form a heterogeneous electric field in the solid polymer electrolytes(SPEs),which is difficult to be compatible with lithium anode,leading to inadequate ionic ***,a facile spray drying method is adopted to increase the mass ratio of inorganic particles and solve the aggregation problems of fillers *** polyvinylidene fluoride(PVDF)with lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)covers the surface of each Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO)granules during the nebulization process,then forming flat solid electrolytes via layer-by-layer *** by the atomic force microscope,the obtained solid electrolytes achieve a homogenous dispersion of Young’s modulus and surface electric *** a result,the as-prepared SPEs present high tensile strength of 7.1 MPa,high ionic conductivity of 1.86×10^(−4)S·cm^(−1)at room temperature,and wide electrochemical window up to 5.0 V,demonstrating increased mechanical strength and uniform lithium-ion migration channels for *** to the as-prepared SPEs,the lithiumsymmetrical cells show a highly stable Li plating/stripping cycling for over 1,000 h at 0.1 mA·cm^(−2).The corresponding Li/LCoO_(2)batteries also present good rate capability and excellent cyclic performance with capacity retention of 80%after 100 cycles at room temperature.

关键词： solid polymer electrolytes spray drying homogenous dispersion solid lithium batteries polyvinylidene fluoride/Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(PVDF/LLZTO) surface electric field

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Structure-dependent re-dispersibility of graphene oxide powders prepared by fast spray drying

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Chinese Journal of Chemical Engineering 2021年第4期34卷 485-492页

作者： Yexun Shi Chang Li Liming Shen Ningzhong Bao College of Chemical Engineering State Key Laboratory of Material-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 210009China

The graphene oxide powder(GOP)obtained from the spray drying process often exhibits poor redispersibility which is considered due to the partial reduction of GO *** reduction of drying temperature can effectively increase the redispersibility of GOP,but result in a decreased drying ***,we found that the redispersibility of GOP is strongly affected by its microstructure,which is determined by the feed *** the increase of feed concentration,the GO nanosheet assembly varies from the disordered stacking to relatively oriented assembly,making the morphology of the GOP transform from balllike(the most crumpled one)to flakelike(the least crumpled one),and the 0.8 mgml 1 is the threshold concentration for the morphology,structure,and redispersibility *** the feed concentration reaches 0.8 mg ml 1,the appearance of the nematic phase in droplet ensures the relatively oriented assembly of GO sheets to form the layered structure with a low crumpling degree,which greatly improves the polar parts surface tension of the solid GOP,making the GOP easier to form hydrogen bonding with water during the redispersion process,thus stabilizing *** work provides useful information for understanding the relationships between the morphology,microstructure,and final redispersibility of GOPs.

关键词： Graphene oxide powder spray drying Re-dispersibility Oriented assembly Layered structure

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Preparation of high emissivity NiCr_2O_4 powders with a spinel structure by spray drying

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International Journal of Minerals,Metallurgy and Materials 2012年第2期19卷 173-178页

作者： Xu-dong Cheng Jie Min Zhen-qi Zhu Wei-ping Ye State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Materials Science and Technology Wuhan University of Technology Wuhan 430070 China

spray-drying was used to produce the high emissivity NiCr2O4 powders with a spinel structure. Preliminary investigations focused on fabricating the high emissivity powders for infrared radiation coatings and finding the relationship between microstructure and emissivity. The NiCr2O4 powders were characterized for composition, microstructure, and infrared emissivity by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, infrared radiant instrument, and Fourier transform infrared spectra （FT-IR）. Thermogravimetry and differential thermal analysis show that the appropriate baking temperature for NiCr2O4 powder preparation is about 1200？C. The emissivity measurement and FT-IR spectra show that, because of the special spinel structure, the NiCr2O4 powders have a high emissivity about 0.91. spray-drying is a suitable method to produce the high emissivity ceramic powders.

关键词： emissivity infrared radiation spray drying powders ceramic materials nickel compounds chromium compounds

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Preparation of spherical spinel LiCr_(0.04)Mn_(1.96)O_4 cathode materials based on the slurry spray drying method

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Rare Metals 2009年第6期28卷 618-623页

作者： JIANG Qinglai HU Guorong PENG Zhongdong DU Ke CAO Yanbing TANG Daichun School of Metallurgical Science and Engineering Central South University Changsha 410083 China

Regular spherical chromium doped spinel lithium manganese oxides （LiCr0.04Mn1.96O4） with an average particle size of about 20μm were prepared by the slurry spray drying process. The materials were compared with non-spherical LiCr0.04Mnl.96O4 materials prepared by the common drying process, and all materials were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, laser particle analyzer and Brunaner-Emmett-Teller （BET） specific surface area test. Electrochemical performances of these cathode materials were studied by cyclic voltammetry （CV）, electrochemical impedance spectroscopy （EIS） and Li/LiCr0.04Mn1.9604 battery test. The results show that the spherical active material is single spinel structure, compact, and with narrow particle size distribution and low BET specific surface area. Compared with the non-spherical material, the spherical material prepared by the spray drying process shows a lower electrochemical impedance, a fewer electrochemical polarization and a better charge/discharge rate capability and capacity retention at elevated temperatures.

关键词： lithium-ion battery spinel LiMn2O4 spray drying chromium doping

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Shell-formation mediated surface composition of uniform two-component microparticles fabricated by micro-fluidic spray drying: Effect of component size and solubility

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Particuology 2022年第8期20卷 68-78页

作者： Xiaoqian Ma Shen Yan Shengyu Zhang Quanyi Yin Xiaodong Chen Winston Duo Wu Engineering Research Centre of Advanced Powder Technology(ERCAPT)School of Chemical and Environmental Engineering College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

This work is aimed to study the effects of component size and solubility on the surface composition of spray dried(SD)uniform two-component particles fabricated by micro-fluidic spray *** precursor liquid consisting of small molecular of methionine(Met,33 g/L)or lysine(Lys,739 g/L)and large-sized silica(12 nm)were prepared by adjusting the mass ratio of components.X-ray energy disper-sive results showed that the respective enrichment degree(De)of Met and Lys on the surface of SD-M1S9 and-L1S9 prepared at 150 C were 182±9% and 125±14%.The De of hydrophobic Met for SD-M1S1 and-M9S1 were 46±9% and 4±2%,respectively,whereas relative hydrophilic Lys mainly distributed internal of the particle meanwhile the De of silica on the surface for SD-L1S1 and-L9S1 were 17±4%and 12±1%,*** temperature(120 and 180℃)showed more apparent effect on the De of amino acid for the particles of less amino *** possible formation mechanism of surface composition and the surface composition impact on the wettability of particles were *** results provide new guidance for manufacturing functional SD powders with various components.

关键词： spray drying Uniform microparticles Two-component Surface composition Size Solubility

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Synthesis and Characterization of Y_ (0.9-x)Gd_xEu_(0.1)BO_3 Phosphors by spray drying Process

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Journal of Rare Earths 2004年第1期22卷 91-94页

作者：王列松林君权泽卫 Key Laboratory of Rare Earth Chemistry and Physics. Changchun Institute of Applied Chemistry

Y 0.9-xGd xEu 0.1BO 3 phosphors were synthesized by spray drying (SD) method, and the results were compared with those by conventional solid state (SS) and citrate gel (CG) methods. The PL intensity of phosphors increases with the increase of x value in Y 0.9-xGd xEu 0.1BO 3 (prepared by SD) due to an energy migration process like Gd 3+-(Gd 3+) n-Eu 3+ occurred in the material. Compared with the latter two methods, the phosphor particles prepared by spray drying method have a better morphology, such as homogeneous size (about 1～3 μm) with spherical shape and smooth surface. Furthermore, the spray drying-derived phosphors have higher photoluminescence (PL) intensity than those by citrate gel method, but still a little lower than those by the solid state method.

关键词： optics solid state chemistry spherical phosphor spray drying rare earth borate

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Preparation of dry flowable formulations of Clonostachys rosea by spray drying and application for Sclerotinia sclerotiorum control

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Journal of Integrative Agriculture 2018年第3期17卷 613-620页

作者： WU Hong-qu SUN Li-li LIU Fang WANG Zhi-ying CAO Chuan-wang College of Forestry Northeast Forestry University Harbin 150040 P.R.China Hubei Biopesticide Engineering Research Centre Wuhan 430064 P.R.China

A dry flowable formulation of Clonostachys rosea with fungicidal activity against Sclerotinia sclerotiorum was prepared by spray drying. The formulation was optimized by a four-factor, three-level orthogonal experiment to screen inert ingredients and spray-drying conditions. The optimal dry flowable formulation of C. rosea included 30% C. rosea （ratio of conidia powder and its fermentation broth is 1：3）, 3% Morwet EFW, 4% K12, 10% Morwet D425, 9% sodium salt of polynaphthalene sulphonic acid （NNO）, 5% croscarmellose sodium, 5% （NH4）2SO4, 0.5% carboxymethyl cellulose sodium （CMC-Na）, 1% oxalic acid and palygorskite （carrier） up to 100%. The formulation exhibited good physical characteristics, such as high dispersibility, viability and a long shelf life. Plate antagonism tests and pot trials indicated that the dry flowable formulation was very effective against S. sclerotiorum, with control efficiency of up to 88.30%. This dry flowable formulation of C. rosea is a new potential commercial fungicide for spray drying to control S. sclerotiorum.

关键词： Clonostachys rosea dry flowable formulation Sclerotinia sclerofiorum spray drying

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Effects of freeze-drying and spray drying processes on functional properties of phosphorylation of egg white protein

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International Journal of Agricultural and Biological Engineering 2015年第4期8卷 116-123页

作者： Liu Lili Wang Huan Ren Guangyue Duan Xu Li Dan Yin Guangjun College of Food and Bioengineering Henan University of Science and TechnologyLuoyang 471023China

Egg white protein(EWP)was phosphorylated with Sodium Tripolyphosphate(STP)at pH *** drying and spray drying were used for drying purpose and the effects of these drying methods on the functional properties were *** functional properties of native and modified proteins were also *** results demonstrated that phosphorylation of EWP markedly improved its functional properties,and that it was more effective for the food *** freeze-dried STP-EWP powders were superior in terms of solubility,emulsion stability,water holding capacity,oil and water absorption capacity and heat gel strength than spray-dried STP-EWP *** results in viscosity showed no significant differences between freeze-dried and spray *** spray-dried powders were better in terms of foaming ability and foam stability than freeze-dried ***,the spray drying required the longest time to *** drying was found to be the best method in terms of production of modified EWP powders with superior functional properties.

关键词： freeze drying spray drying egg white protein phosphorylation functional properties

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Improved photocatalytic activity of nano CuO-incorporated TiO2 granules prepared by spray drying

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Progress in Natural Science:Materials International 2015年第4期25卷 334-341页

作者： Zongjie Liu Chungen Zhou School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics

4 wt% CuO–96 wt% TiO2 granules were prepared by a spray drying process. The microstructure and optical property of CuO–TiO2 granules were studied. The results indicate that copper existed in the form of CuO. The spray dried granules possess spherical geometry and smooth surface with grain size in the range of 40–80 μm. CuO–TiO2 has a relatively smaller E g value(2.85 eV) than Ti O2(3.17 eV). The photocatalytic property of CuO–TiO2 granules was investigated by degradation of a model pollutant(the azo dye methyl orange) under the irradiation of the xenon lamp equipped with a band pass fi lter of 365 nm. The CuO–TiO2spray-dried granules degrade about 10% more MO than TiO2spray-dried granules under UV irradiation within the same time. The XPS spectra suggested that Cu2 tand reduced copper species were coexistent in reacted CuO–TiO2 photocatalyst. The improvement of photocatalytic activity for CuO–TiO2 was mainly attributed to effective separation of photogenerated electron–hole pairs in the presence of CuO.

关键词： CuO–TiO2 spray drying Photocatalytic degradation

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