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Temperature-induced hydrophobicity transition of MXene membrane for directly preparing W/O emulsions
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作者 Yingxiang Ni Can Yuan +5 位作者 Shilong Li Jian Lu Lei Yan Wei Gu Weihong Xing Wenheng Jing 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第3期59-62,共4页
Although hydrophilic membranes are desired for reducing resistance to water permeation, hydrophilic surfaces are not used in the water-in-oil(W/O) membrane emulsification process because water spreads on the hydrophil... Although hydrophilic membranes are desired for reducing resistance to water permeation, hydrophilic surfaces are not used in the water-in-oil(W/O) membrane emulsification process because water spreads on the hydrophilic surface without forming droplets. Here, we report that a hydrophilic ceramic membrane can form a hydrophobic interface in diesel at a higher temperature;interestingly, the experiments show that the contact angle increases when the temperature rises. The hydrophilic membrane surface evolves into a hydrophobic interface, particularly near the boiling point of water, resulting in a water contact angle of 147.5° ± 1.2°. This work established a method for preparing W/O monodispersed emulsions by direct emulsification of hydrophilic ceramic membranes at a temperature close to the boiling point of water.Additionally, it made high flux of membrane emulsification of monodispersed W/O emulsions possible,which satisfied the industrial requirements of fluidized catalytic cracking in the petrochemical industry. 展开更多
关键词 Membrane emulsification Ceramic membrane Hydrophobic interface w/o emulsions
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一种O/W型聚氨酯水性外脱模剂的制备及性能研究
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作者 陈晓 赵启明 +3 位作者 陶璐华 洪叶 汪灿 张文蕊 《西南民族大学学报(自然科学版)》 CAS 2024年第3期283-288,共6页
传统油基脱模剂含有可能对环境产生污染的有机溶剂,随着全球环保意识的增强,更为绿色环保无毒的水性脱模剂逐渐成为研究热点.为了开发汽车内饰使用的新型脱模剂,以二甲基硅油、含氢硅油等为主要原料,制备出一种O/W型聚氨酯水性外脱模剂... 传统油基脱模剂含有可能对环境产生污染的有机溶剂,随着全球环保意识的增强,更为绿色环保无毒的水性脱模剂逐渐成为研究热点.为了开发汽车内饰使用的新型脱模剂,以二甲基硅油、含氢硅油等为主要原料,制备出一种O/W型聚氨酯水性外脱模剂.通过测定脱模剂样品性能,探讨了主脱模剂种类及配比、乳化体系复配比例对脱模剂性能的影响.采用能谱仪(EDS)对脱模后的聚氨酯泡沫表面进行元素分析.结果表明:二甲基硅油和含氢硅油按照1∶1配比作为基础聚合物,固含量19.41%,采用非离子表面活性剂SP⁃80、TW⁃80复合乳化体系制备的O/W型聚氨酯水性外脱模剂稳定性最好,脱模后的聚氨酯泡沫表面没有Si元素残留,具有最佳脱模效果. 展开更多
关键词 o/w型乳液 水性外脱模剂 聚氨酯发泡 脱模效果 稳定性
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石榴皮活性物质提取及其W/O/W乳液稳态化包埋研究
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作者 左云会 胡腾根 +3 位作者 朱永清 徐玉娟 唐语谦 余元善 《中国食品学报》 EI CAS CSCD 北大核心 2024年第9期167-183,共17页
石榴是药食同源的水果,在加工过程会产生大量石榴皮渣等副产物。为提高石榴副产物利用率,本文采用不同方法提取石榴皮活性成分,研究其抗氧化活性。采用水包油包水型乳液(W/O/W乳液)对其进行稳态化包埋,研究W/O/W对多酚稳定性及生物利用... 石榴是药食同源的水果,在加工过程会产生大量石榴皮渣等副产物。为提高石榴副产物利用率,本文采用不同方法提取石榴皮活性成分,研究其抗氧化活性。采用水包油包水型乳液(W/O/W乳液)对其进行稳态化包埋,研究W/O/W对多酚稳定性及生物利用率的影响。结果表明:相比超高压提取和酶法提取,超声辅助醇提法具有较高的多酚提取率,为25%。石榴皮渣活性提取物对DPPH、羟基自由基清除力、总还原力好于VC;ABTS+清除活性与VC无显著差异;在质量浓度0.4mg/mL以下时,对超氧阴离子清除能力高于VC。W/O/W乳液能提高石榴皮渣活性提取物的储藏稳定性,且可使石榴皮活性物质免受体外胃消化的影响,靶向地在模拟小肠内传递和释放。本研究为石榴皮副产物的深加工提供了理论参考。 展开更多
关键词 石榴皮 多酚 抗氧化活性 w/o/w乳液 稳态化包埋
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油相组成对W/O型Pickering乳液稳定性和流变性能的影响
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作者 张聚媛 台秀梅 +3 位作者 刘慧民 马晓原 高续 罗毅 《日用化学工业(中英文)》 CAS 北大核心 2024年第8期879-886,共8页
以二甲基甲硅烷基化硅石为乳化剂,采用均质乳化法制备W/O型Pickering乳液,通过偏光显微镜、表面张力仪、接触角测量仪和流变仪研究了油脂的极性、流变改性剂对W/O型Pickering乳液稳定性及流变性能的影响。结果表明,相比于非极性油脂,极... 以二甲基甲硅烷基化硅石为乳化剂,采用均质乳化法制备W/O型Pickering乳液,通过偏光显微镜、表面张力仪、接触角测量仪和流变仪研究了油脂的极性、流变改性剂对W/O型Pickering乳液稳定性及流变性能的影响。结果表明,相比于非极性油脂,极性油脂制备出来的W/O型Pickering乳液液滴更小,稳定性能更优,其中霍霍巴油制备的Pickering乳液粒径分布较窄,形状均一,稳定性好;添加流变改性剂后,Pickering乳液的粒径有一定的下降,常温稳定性和低温稳定性均有小幅度提升,对于不同的油脂,与之结构上存在相似性的流变改性剂对粒径的降低及稳定性的提高效果较好。不同油脂制备的W/O型Pickering乳液均为非牛顿流体,随着剪切速率的增大,Pickering乳液的黏度降低,并且所有Pickering乳液的弹性模量(G')高于黏性模量(G''),均为凝胶乳液,线性黏弹区为0.001%~0.100%,添加流变改性剂后,Pickering乳液的黏度上升,剪切稀化现象基本不变,但线性黏弹区增大,可能与Pickering乳液的粒径和油水界面能的变化有关。 展开更多
关键词 w/o型Pickering乳液 乳液液滴粒径 稳定性 流变性能
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‘蓝鸟’睡莲花色苷W/O皮克林乳液的制备及稳定性分析
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作者 赵霞 陈彦甫 +1 位作者 周卫娟 赵莹 《现代食品科技》 CAS 北大核心 2024年第6期206-213,共8页
由于睡莲中所提取的活性成分具有不稳定性,对活性成分的包埋技术有待探索。该文以热带睡莲中的‘蓝鸟’睡莲(Nymphaea'Blue Bird')作为研究对象,通过制备W/O皮克林乳液将睡莲花色苷包埋,目的在于构建一个稳定的食品级体系,并研... 由于睡莲中所提取的活性成分具有不稳定性,对活性成分的包埋技术有待探索。该文以热带睡莲中的‘蓝鸟’睡莲(Nymphaea'Blue Bird')作为研究对象,通过制备W/O皮克林乳液将睡莲花色苷包埋,目的在于构建一个稳定的食品级体系,并研究该技术对花色苷的包埋稳定性与释放效果。以花色苷溶液作为水相(W),大豆油为油相(O),乳化剂选取亲脂性乳化剂聚甘油蓖麻醇酸酯(PGPR),制备不同水相体积分数的W/O乳液。研究发现,水相体积分数为30%和50%时制备的W/O乳液,在不同温度下贮藏15 d后体系稳定,对花色苷的包封率分别为75.97%和78.12%,且15 d内的包埋稳定性较好。以不同剪切速率制备W/O乳液考察其稳定性,当剪切速率为28000 r/min时,W/O乳液的表观稳定,保存120 min之后离心保留率达到97.40%。综合研究,该论文制备的W/O皮克林乳液体系平衡,且对花色苷有较好的包封效果。 展开更多
关键词 ‘蓝鸟’睡莲 花色苷 w/o皮克林乳液 稳定性
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W/O乳液电纺Poloxamer188■复合聚L-乳酸纤维的表征
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作者 崔科畅 吕蕴麒 +1 位作者 董欣 王浩 《锦州医科大学学报》 CAS 2024年第5期7-14,共8页
目的探究Poloxamer188■复合聚乳酸W/O乳液在电纺纤维中的形态特征和材料复合性能。方法利用Poloxamer188■作为乳化剂,以Poloxamer188■和聚L-乳酸的二氯甲烷溶液作为油相,纯水作为水相,在水相与油相体积比为1∶10的条件下,通过超声波... 目的探究Poloxamer188■复合聚乳酸W/O乳液在电纺纤维中的形态特征和材料复合性能。方法利用Poloxamer188■作为乳化剂,以Poloxamer188■和聚L-乳酸的二氯甲烷溶液作为油相,纯水作为水相,在水相与油相体积比为1∶10的条件下,通过超声波乳化技术制备出W/O型乳液,随后进行静电纺丝。通过光学显微镜观察纺丝所得产品的形态,并采用红外光谱、差示热分析、X-射线衍射和络合显色-分光光度法等技术手段,对释放出的Poloxamer188■进行测定,并绘制出时间-释放百分率曲线,以此对材料复合物进行详细表征。结果获取超细纤维,并随着Poloxamer188■复合量增加,红外光谱、差示热分析曲线和X-射线衍射图谱逐渐展现出Poloxamer188■的特征峰。Poloxamer188■从纤维中的释放表现出明显突释现象,随后是约48 h的缓释阶段,之后进入平台期。随着Poloxamer188■复合量提升,其突释量和平台期的释放量也随之增加,并呈现出线性关系。结论通过W/O乳液静电纺丝技术,可以制备出超细纤维。随着Poloxamer188■比例的调整,其与聚L-乳酸的复合程度也会相应改变。 展开更多
关键词 Poloxamer188■ 聚L-乳酸 纤维 静电纺丝 w/o乳液 材料复合
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DESIGN AND IMPLEMENTATION OF COMPLETELY AUTOMATIC AND CONTINUAL PRODUCTION LINE FOR WATER-IN-OIL(W/O) EMULSION EXPLOSIVE 被引量:1
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作者 He, Jianjun Yu, Shouyi Gui, Weihua 《中国有色金属学会会刊:英文版》 EI CSCD 1999年第2期201-207,共7页
1INTRODUCTIONExplosiveisoneofthetremendousenergyresourceswhichpeopleoftenutilize.Itisnotonlyusedinmilitaryp... 1INTRODUCTIONExplosiveisoneofthetremendousenergyresourceswhichpeopleoftenutilize.Itisnotonlyusedinmilitarypurposes,butalsous... 展开更多
关键词 w/o emulsion explosiveautomatic ADJUsTING CHARGE ratioautomatic CHARGE mixingautomatic ADJUsTING output
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Synthesis of Spherical (Y,Gd)BO_3:Eu^(3+)Phosphor Using W/O Emulsion System
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作者 崔向中 庄卫东 +5 位作者 张熙莹 夏天 龙震 鱼志坚 赵春雷 黄小卫 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第6期719-723,共5页
Spherical (Y, Gd)BO3:Eu^3+ phosphor particles with a narrow size distribution(2 -4 μm) was obtained by firing the Y-Gd-Eu-BO3 precursor prepared in a W/O style emulsion system. In the W/O emulsion system, keros... Spherical (Y, Gd)BO3:Eu^3+ phosphor particles with a narrow size distribution(2 -4 μm) was obtained by firing the Y-Gd-Eu-BO3 precursor prepared in a W/O style emulsion system. In the W/O emulsion system, kerosene, used as oil phase, was mixed with Span 80 and Tween 80 compounds which were employed as the emulsifier with an HLB (hydrophile-lipophile balance) value of 5.2- 5.3. Both rare earths (Y, Gd and Eu) nitrate and boric acid solution or ammonia solution were used as aqueous phase. The synthesis conditions, such as emulsion composition, emulsifying style, precipitation reaction process, reaction temperature, morphology control, and so on, were investigated, and the optimum synthesis conditions for preparing spherical (Y, Gd)BO3:Eu^3+ phosphor was obtained. The phosphor was characterized by XRD, SEM, laser particle size analysis, emission and excitation spectrum under vacuum ultraviolet (VUV), and so on. The phosphor synthesized using the water-in-oil emulsion method with median diameter (D50) of 2 - 4 μm shows agreeable photoluminescence (PL) property and sphericity. The main emission peak appears at about 593 nm, which corresponds to ^5D0→^7F1 transition (magnetic-dipole transition) of the Eu^3+ ion. The cell parameters and powder diffraction data were indexed. The structure of the phosphor belongs to the hexagonal system with space group P63/m. 展开更多
关键词 emulsion w/o PDP PHosPHoR photoluminescence (PL) property VUV rare earths
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Effect of Emulsifier Concentration on the Oxidation of an O/W Emulsion Prepared from Canola Oil
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作者 Yukihiro Yamamoto Rino Misawa 《Food and Nutrition Sciences》 2018年第6期683-692,共10页
Oils and fats exist in many foods as emulsions, and preventing the oxidation of emulsion is vital importance for the food industry. In this study, the effect of different concentrations of Tween 20 (0.5, 2.5, 5.0, 10 ... Oils and fats exist in many foods as emulsions, and preventing the oxidation of emulsion is vital importance for the food industry. In this study, the effect of different concentrations of Tween 20 (0.5, 2.5, 5.0, 10 w% vs. oil) on the oxidation of canola oil O/W emulsion was investigated. Oxidation was conducted at 34&deg;C in the dark and accelerated using 2,2-azobis (2,4-dimethylvaleronitrile) (AMVN) and 2,2’-azobis (2-methylpropionamidine) dihydrochloride (AAPH) as radical generators. Peroxide value (PV, mEq/kg) was monitored as generation of the primary oxidation compound. PV was suppressed by Tween 20 in a dose-dependent manner in both emulsion system using AMVN and AAPH, and the tendency of suppression was clearer in the system using AMVN than in that using AAPH. Contrarily, there were no significant differences in PV when emulsions were prepared with tocopherol-stripped oil. The particle size of emulsion droplets were also consistent among emulsions prepared. However, tocopherol contents at lipid phase of the emulsions prior to oxidation decreased with concentration of Tween 20. These results suggest that excess Tween 20 could cause tocopherol to migrate from the lipid phase of the emulsions to lipid-oil interface, suppressing the oxidation of emulsions. 展开更多
关键词 o/w emulsion oXIDATIoN TwEEN 20
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De-emulsification of 2-ethyl-1-hexanol/water emulsion using oil-wet narrow channel combined with low-speed rotation
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作者 Ling Lü Kejing Wu +2 位作者 You Tang Siyang Tang Bin Liang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第10期2048-2054,共7页
Low-speed rotation of disc in an internal circulation of a novel de-emulsification with rotation-dise horizental contactor(RHC-D) realized de-emulsification for O/W emulsions due to repeated coalescence in oil-wet nar... Low-speed rotation of disc in an internal circulation of a novel de-emulsification with rotation-dise horizental contactor(RHC-D) realized de-emulsification for O/W emulsions due to repeated coalescence in oil-wet narrow channels at a low rotation speed. For three emulsions included ethanol/water/2-ethyl-1-hexanol, ethanol/water/2-ethyl-1-hexanol/SDS(Sodium Dodecyl Sulfonate) and 2-ethyl-1-hexanol/water/SDS emulsion, deemulsification ratios of oil phase could reach 1, 1 and 0.67 respectively at 170 r·min-1, and de-emulsification ratios increased obviously after agitating 10 min. De-emulsification experiment in the seam indicated that oil droplet sizes in O/W emulsion became larger after de-emulsification. The main de-emulsification mechanism in RHCD was the coalescence of oil droplets in oil-wet narrow channels. With increase of the rotation speed, oil droplets dispersed better in the aqueous phase. However, de-emulsification effect enhanced due to the increase of the coalescence rate at a bit higher rotation speed. In addition, internal circulation made those O/W emulsions to be broken repeatedly, consequently de-emulsification ratio increased. Repeated de-emulsification through internal circulation might make continuous extraction of ethanol come true at a low rotation speed. 展开更多
关键词 De-emulsification oil-wet channel Low rotation speed o/w emulsion Internal circulation
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Experimental Study on Latent Heat Storage Characteristics of W/O Emulsion by Ultrasonic Wave Impression
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作者 Shin-ichi Morita Yasutaka Hayamizu +3 位作者 Akihiko Horibe Naoto Haruki Hideo Inaba Issei Higashi 《Open Journal of Fluid Dynamics》 2013年第2期48-54,共7页
The flowable latent heat storage material like Oil/Water type emulsion, microencapsulated latent heat material-water mixture or ice slurry, etc., is enabled to transport the latent heat in a pipe. Supercooling phenome... The flowable latent heat storage material like Oil/Water type emulsion, microencapsulated latent heat material-water mixture or ice slurry, etc., is enabled to transport the latent heat in a pipe. Supercooling phenomenon of the dispersed latent heat storage material in continuous phase is obstructed by a latent heat storage. The latent heat storage rates of dispersed waterdrops in W/O (Water/Oil) emulsion are investigated experimentally in this study. The waterdrops in emulsion have the diameter within 3 - 25 μm, the averaged diameter of waterdrops is 7.3 μm and the standard deviation is 2.9 μm. Supercooling release of waterdrops in emulsion is examined by short time impressing of the ultrasonic. The direct contact heat exchange method is chosen as the phase change rate evaluation of waterdrops in W/O emulsion. The supercooled temperature is set as parameters of this study. The previous obtained experimental result, as the condition without impressing ultrasonic wave, showed that the 35 K or more degree from melting point brings 100% latent heat storage rate of W/O emulsion. It is clarified that it is possible to reduce 20 K of supercooling degree by impressing the ultrasonic. 展开更多
关键词 HEAT storage LATENT HEAT w/o emulsion Direct Contact HEAT EXCHANGE Ultrasonic
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Development of Fine Poly(D,L-Lactic-Co-Glycolic Acid) Particles for Hydrophilic Drug Using a Solid-in-Oil-in-Water Emulsion
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作者 Eiichi Toorisaka Kikumi Watanabe Makoto Hirata 《Journal of Encapsulation and Adsorption Sciences》 2018年第2期58-66,共9页
Poly(D,L-Lactic-Co-Glycolic Acid) (PLGA) copolymers have been extensively used as controlled-release carriers for many hydrophilic drugs because they are non-toxic, biodegradable, bioavailable, and biocompatible. In g... Poly(D,L-Lactic-Co-Glycolic Acid) (PLGA) copolymers have been extensively used as controlled-release carriers for many hydrophilic drugs because they are non-toxic, biodegradable, bioavailable, and biocompatible. In general, PLGA particles have been produced by a solvent evaporation technique utilizing water-in-oil-in-water (W/O/W) emulsions. However, W/O/W emulsions are unstable, causing the outer and inner aqueous phases to easily fuse during particle preparation. Consequently, a sufficient amount of drug was not encapsulated inside the particles. In this study, we examined a new particle preparation method utilizing a solid-in-oil-in-water (S/O/W) emulsion technique. The advantages of S/O/W emulsions, wherein a surfactant-drug complex disperses into the oil phase, were as follows: 1) leakage of hydrophilic drugs from the emulsions was inhibited, and 2) facile control over the emulsion particle size. Thus, the PLGA particles prepared by this method showed high encapsulation efficiency of drugs and formation of fine particles of submicron size by membrane emulsification were achieved. 展开更多
关键词 PLGA HYDRoPHILIC drugs s/o/w emulsions solvent EVAPoRATIoN
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Emulsion Polymerization of P (MMA-AA-EA) and Its Demulsifying Performance in Water/Oil Emulsion
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作者 Xia Jiang Zhiming Huang +2 位作者 Yuanzhu Mi Jiazhe Kuang Fan Ye 《Open Journal of Yangtze Oil and Gas》 2019年第3期212-224,共13页
Stable water-in-oil emulsions are produced in oil exploitation and cause many environmental and operational issues.In this paper,a co-polymer demulsifier is reported in detail;an emulsion polymerization method is used... Stable water-in-oil emulsions are produced in oil exploitation and cause many environmental and operational issues.In this paper,a co-polymer demulsifier is reported in detail;an emulsion polymerization method is used to prepare nano-P(MMA-AA-EA)with MMA,AA and EA as the monomers,DVB as the cross-linker and APS as the initiator.The resulting products are characterized by FT-IR.Furthermore,the surface tension and particles size analysis is investigated.The results show that the surface tension reduction is 10.66 mN/m at 20?C when the concentration of co-polymer is 1000 ppm and the average size is 76.99 nm.Moreover,the HLB of polymer is discussed specifically by changing the amount of AA.With the increase of AA,the HLB value of the polymer is increased accordingly.Besides,the demulsification performance of the co-polymer is also evaluated at different synthesis and demulsification conditions.It is showed that the maximum demulsification efficiency is 96%at 70?C for 60 min.The optimum concentration of demulsifier is 400 ppm when the amounts of AA and DVB are 1.4 g and 0.1 g,respectively.At last,the process of demulsification is showed under a microscope;the coalescence process of water droplets is indicated under the action of the demulsifier. 展开更多
关键词 emulsion PoLYMERIZATIoN Polymer DemulsIFIER w/o emulsion Demulsifying Efficiency Process of DemulsIFICATIoN
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基于熊果酸的W/O/W型Pickering乳液制备方法 被引量:2
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作者 刘冬雪 肖茜 +3 位作者 刘成国 罗洁 罗扬 周辉 《食品与机械》 CSCD 北大核心 2023年第2期176-181,共6页
目的:提高熊果酸的应用范围和生物利用率。方法:以熊果酸为乳化剂,果胶为外水相,采用两步法制备W/O/W型Pickering乳液。通过单因素试验优化W/O乳液制备条件,研究果胶质量浓度对W/O/W型Pickering乳液理化性质、微观结构、流变学特性及长... 目的:提高熊果酸的应用范围和生物利用率。方法:以熊果酸为乳化剂,果胶为外水相,采用两步法制备W/O/W型Pickering乳液。通过单因素试验优化W/O乳液制备条件,研究果胶质量浓度对W/O/W型Pickering乳液理化性质、微观结构、流变学特性及长期稳定性的影响。结果:W/O乳液的最佳制备工艺为熊果酸质量浓度4 g/100 mL、水油质量比2∶3、均质转速9 000 r/min、均质时间5 min;以果胶为外水相制备的双层乳液粒径均在30~40μm,果胶质量浓度的增加使乳液的zeta电位绝对值、流变性能以及4℃贮藏稳定性有着显著性的提高。结论:果胶质量浓度为0.3,0.4,0.5 g/100 mL时能够制备稳定的Pickering双层乳液。 展开更多
关键词 w/o/w Pickering乳液 熊果酸 果胶 稳定性
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THE SWELLING BEHAVIOR OF (W/O)/W LIQUID SURFACTANT MEMBRANE (Ⅰ) ADSORPTION OF SURFACTANT AT THE INTERFACE AND THE SWELLING CAUSED BY EMULSIFICATION
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作者 王子镐 傅举孚 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 1990年第2期242-254,共13页
The concept of effective concentration of surfaetant in membrane phase has been proposed,considering the high ad-sorption density of the surfactant at the droplet interfaces in LSM system.The effective concentration o... The concept of effective concentration of surfaetant in membrane phase has been proposed,considering the high ad-sorption density of the surfactant at the droplet interfaces in LSM system.The effective concentration of surfactant,C<sub>2</sub>,can be estimated by Eq.(7)—(9).The swelling caused by emulsification during the initial dispersion process was investigated.The swelling rate wasmeasured by a density method.A model for estimating the"Emulsification" swelling rate,F<sub>se</sub>,has been proposed,basedon a mechanism of swelling due to the entrainment of water resulted from the interracial turbulence and emulsification inthe initial dispersion process.It has been found that Eq.(26)gives excellent fit to the experimental data of Fujinawa,etal.and of the authors. 展开更多
关键词 sURFACTANT emulsion swELLING droplet turbulence sorption w/o dispersed adsorbed DIAMETERs
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酪蛋白酸钠-明胶制备S/O/W乳状液的稳定性 被引量:3
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作者 张杰 李功伟 +1 位作者 许朵霞 曹雁平 《中国食品学报》 EI CAS CSCD 北大核心 2022年第2期65-76,共12页
碳酸钙是一种常用的强化钙,然而,其悬浮稳定性差,易产生沉淀,严重限制了碳酸钙在食品加工中的应用。以固/油/水(S/O/W)乳状液形式负载碳酸钙,构建具有特定结构分布的钙-脂质微球,有望改善其溶解性和稳定性。本文以食品级碳酸钙为S相,大... 碳酸钙是一种常用的强化钙,然而,其悬浮稳定性差,易产生沉淀,严重限制了碳酸钙在食品加工中的应用。以固/油/水(S/O/W)乳状液形式负载碳酸钙,构建具有特定结构分布的钙-脂质微球,有望改善其溶解性和稳定性。本文以食品级碳酸钙为S相,大豆油为O相,酪蛋白酸钠-明胶为W相,构建S/O/W钙-脂质微球,研究不同质量分数明胶和不同S/O相添加量对微球粒径、物理稳定性、流变学与微观结构的影响,探索S/O/W钙-脂质微球形成规律及稳定性。结果表明:添加不同质量分数的明胶均能提高S/O/W乳液的稳定性,且乳液粒径随明胶质量分数的增大而减小,乳液的表观黏度、摩擦系数均减小,微观网络结构更加致密。增大S/O相添加量使乳液稳定性变差,粒径分布范围增大,表观黏度略有增加。添加明胶制备S/O/W乳状液可以提高乳状液的稳定性,研究结果为解决难溶性钙盐在液态食品中的分散稳定性提供理论基础。 展开更多
关键词 s/o/w乳状液 乳液稳定性 流变学 微观结构
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W/O乳液凝固剂对SPI冷凝胶流变特性与微观结构的影响 被引量:5
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作者 朱巧梅 郦金龙 +1 位作者 范鑫 殷丽君 《农业机械学报》 EI CAS CSCD 北大核心 2015年第2期240-246,共7页
采用扫描电镜(SEM)、质地剖面分析(TPA)及动态流变技术研究卤水及不同油包水(W/O)乳液凝固剂对大豆分离蛋白(SPI)冷凝胶微观结构及流变特性的影响。流变结果表明,弹性模量(G')的变化高度依赖W/O乳液中的镁盐释放速度。随着反应时间... 采用扫描电镜(SEM)、质地剖面分析(TPA)及动态流变技术研究卤水及不同油包水(W/O)乳液凝固剂对大豆分离蛋白(SPI)冷凝胶微观结构及流变特性的影响。流变结果表明,弹性模量(G')的变化高度依赖W/O乳液中的镁盐释放速度。随着反应时间的延长,G'值不断增大,与传统卤水相比,新型W/O乳液凝固剂延长了冷凝胶的凝固时间,在凝胶形成过程中,W/O乳液对镁盐起到了缓释作用。对比不同W/O乳液凝固剂发现,含有乳清分离蛋白(WPI)的乳液形成SPI冷凝胶的时间更长,而且弹性模量值更小。此外,电镜结果表明W/O乳液凝固剂能显著降低冷凝胶的硬度并改善蛋白凝胶的网络结构,使SPI冷凝胶具有更小的网孔孔隙和更加均匀的网状结构。 展开更多
关键词 冷凝胶 油包水乳液 凝固剂 流变特性 微观结构 质构分析
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不同结构形态的ST-G-PAM接技共聚物的W/O乳液合成及改性研究 被引量:2
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作者 杨巍 崔丹 +2 位作者 张连生 王玉芹 张晓南 《黑龙江大学自然科学学报》 CAS 1997年第2期95-99,共5页
以ST为骨架,用Ce4+-S2P82-络合引发,通过改变接枝点数及校长度,获得了团族形、梳形、长链形三种结构形态明显差异的ST-G-PAM接技共聚物W/O乳液,并在W/O乳液中用保护剂进行了产物的Mannich反应,制取了相应的Mannich碱及季该盐... 以ST为骨架,用Ce4+-S2P82-络合引发,通过改变接枝点数及校长度,获得了团族形、梳形、长链形三种结构形态明显差异的ST-G-PAM接技共聚物W/O乳液,并在W/O乳液中用保护剂进行了产物的Mannich反应,制取了相应的Mannich碱及季该盐的W/O乳液产物。 展开更多
关键词 w/o乳液中 接枝共聚物 淀粉 聚丙烯酰胺
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利用SPG膜制备O/W型乳液实验研究 被引量:2
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作者 陈登飞 李娜 杨建 《膜科学与技术》 CAS CSCD 北大核心 2007年第3期10-14,共5页
利用孔径为0.6μm的SPG(Shirasu Porous Glass)多孔微滤膜,以异辛烷为分散相、pH=7的磷酸盐缓冲水溶液为连续相、以SDS(十二烷基硫酸钠)和PVA(聚乙烯醇)分别为水相乳化剂和稳定剂,制备了。倒型乳液,研究了操作条件对乳液性能... 利用孔径为0.6μm的SPG(Shirasu Porous Glass)多孔微滤膜,以异辛烷为分散相、pH=7的磷酸盐缓冲水溶液为连续相、以SDS(十二烷基硫酸钠)和PVA(聚乙烯醇)分别为水相乳化剂和稳定剂,制备了。倒型乳液,研究了操作条件对乳液性能包括液滴大小及分布的影响关系.当跨膜压差在0.12~0.16MPa时,连续相流速分布在0.20~0.40m/s时,乳化剂浓度在其临界胶束浓度(CMC)之上时,乳液的单分散性较好.由于乳液具有良好的稳定性和单分散性.可用于多相界面酶催化反应, 展开更多
关键词 膜乳化 sPG膜 o/w型乳液 操作参数
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平阳霉素明胶微球复乳S/o/w的研究 被引量:1
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作者 黎洪珊 魏树礼 卢炜 《中国药学杂志》 CAS CSCD 北大核心 1995年第10期600-603,共4页
将超声分散法制得的油包平阳霉素明胶微球乳剂s/o分散于3%豆磷脂水溶液中,形成复合乳剂s/o/w。复乳中s/o微珠的粒径为17.07±8.68μm。其含药量为14.86~15.00mg/ml,体外释药符合Higu... 将超声分散法制得的油包平阳霉素明胶微球乳剂s/o分散于3%豆磷脂水溶液中,形成复合乳剂s/o/w。复乳中s/o微珠的粒径为17.07±8.68μm。其含药量为14.86~15.00mg/ml,体外释药符合Higuchi方程。动物实验表明:其血药浓度平稳持久,具有良好的淋巴亲和性,并可能降低肺毒性。且流动性和通针性均较好。 展开更多
关键词 平阳霉素 明胶微球 乳剂 高效液相色谱
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