Emulsion is usually used as lubricant on 20-roller Sendzimir cold rolling mill at Silicon Steel Strip Plant, Wuhan Iron & Steel Co. During the process of rolling, emulsion plays an important role in cooling and lu...Emulsion is usually used as lubricant on 20-roller Sendzimir cold rolling mill at Silicon Steel Strip Plant, Wuhan Iron & Steel Co. During the process of rolling, emulsion plays an important role in cooling and lubrication. Due to high pressure between roller and steel strip. The iron oxide remained on the surface of steel strip after pickling, and the tiny magnetic particles resulted from wearing or peeling of the strip surface leave the strip and suspend in emulsion.
The previous Haffman filter made in Japan belonged to mechanical filtration, which can remove larger magnetic particles and is inefficient for tiny ones due to filtering precision. The diameter of 95 % magnetic particles is variable from 1 μm to 2 μm. With the increase of production on the mill (more two times than the original design production), Haffman filter bears a heavy burden and couldn't control cleanliness of emulsion effectively. In this supercharged case, the recycling of such polluted fluid was once thought to be impractical. Therefore, the consumption of lubricant rises largely. Moreover, it costs money to buy lubricant and more money to dispose waste lubricant.
In view of above mentioned, an equipment purifying emulsion has been developed using an electromagnetic technique. Compared with Haffman filter, this equipment can remove most of tiny magnetic particles suspended in emulsion. The basic characteristics of the purification equipment are that the emulsion to be purified in form of thin film possess a strong magnetic field several times at a low velocity. Therefore, the tiny or super-tiny magnetic particles suspended in emulsion are captured in a short time. This purification equipment has got a national patent (P R China Patent No. ZL94201662.9, 1994) and installed on three 20-roller Sendzimir cold rolling mills at Silicon Steel Strip Plant, Wuhan Iron & Steel Co, 1997 and at Shenyang Strip and Sheet Plant in China. The main purpose of this paper is to analyze the purification mechanism, as well as describe the basic characteristics of the purification equipment structure and its application.展开更多
The results of studies of thinning free water-in-oil emulsion films stabilized by solid particles by the Applied Pressure Drop Technique (APDT) are reported. The quasi-equilibrium film thickness achieved by slow incre...The results of studies of thinning free water-in-oil emulsion films stabilized by solid particles by the Applied Pressure Drop Technique (APDT) are reported. The quasi-equilibrium film thickness achieved by slow increasing the pressure drop was smaller than the rupture thickness obtained by sharp increasing the pressure. It is shown that non-equilibrium films ruptured with thicknesses corresponding to adjustment of the packing of solid particles in the films. It is supposed that the restructuring package is the cause of the earlier breakthrough of the film.展开更多
The understanding of the structure morphology of oil-rich emulsion from enzyme-assisted extraction processing(EAEP)was a critical step to break the oil-rich emulsion structure in order to recover oil.Albeit EAEP metho...The understanding of the structure morphology of oil-rich emulsion from enzyme-assisted extraction processing(EAEP)was a critical step to break the oil-rich emulsion structure in order to recover oil.Albeit EAEP method has been applied as an alternative way to conventional solvent extraction method,the structure morphology of oil-rich emulsion was still unclear.The current study aimed to investigate the structure morphology of oil-rich emulsion from EAEP using 3 D confocal Raman imaging technique.With increasing the enzymatic hydrolysis duration from 1 to 3 h,the stability of oil-rich emulsion was decreased as visualized in the 3 D confocal Raman images that the protein and oil were mixed together.The subsequent Raman spectrum analysis further revealed that the decreased stability of oil-rich emulsion was due to the protein aggregations via SS bonds or protein-lipid interactions.The conformational transfer in protein indicated the formation of a compact structure.展开更多
Biodegradable triblock copolymer PLA/PEG/PLA was synthesized by ring-opening bulk polymerization of D,L-lactide in the presence of poly(ethylene glycol) (PEG), in the molecular structure of which, the length of PEG an...Biodegradable triblock copolymer PLA/PEG/PLA was synthesized by ring-opening bulk polymerization of D,L-lactide in the presence of poly(ethylene glycol) (PEG), in the molecular structure of which, the length of PEG and PLA chain segments was made to be quite different. Nanoparticles were prepared by using the copolymer via a double emulsion-evaporation technique. The paticles tended to form the configuration like capsules, i.e., the nanocapsules, because of the great size difference in PEG and PLA segments of the copolymer. Insulin, chosen as a model drug, was encapsulated into nanocapsules. The effect of preparation conditions on the size, insulin encapsulation efficiency, and in vitro drug release behavour of the nanoparticles were investigated. The experimental results show that the nanocapsules had a smooth spherical surface and the mean diameter was in the range from 180 nm to 350 nm, and the entrapment of insulin achieved up to 78.4. The drug-loaded nanocapsules released their content continuously, remarkably different from the corresponding micelles which gave a significant initial burst release followed by a slow release.展开更多
文摘Emulsion is usually used as lubricant on 20-roller Sendzimir cold rolling mill at Silicon Steel Strip Plant, Wuhan Iron & Steel Co. During the process of rolling, emulsion plays an important role in cooling and lubrication. Due to high pressure between roller and steel strip. The iron oxide remained on the surface of steel strip after pickling, and the tiny magnetic particles resulted from wearing or peeling of the strip surface leave the strip and suspend in emulsion.
The previous Haffman filter made in Japan belonged to mechanical filtration, which can remove larger magnetic particles and is inefficient for tiny ones due to filtering precision. The diameter of 95 % magnetic particles is variable from 1 μm to 2 μm. With the increase of production on the mill (more two times than the original design production), Haffman filter bears a heavy burden and couldn't control cleanliness of emulsion effectively. In this supercharged case, the recycling of such polluted fluid was once thought to be impractical. Therefore, the consumption of lubricant rises largely. Moreover, it costs money to buy lubricant and more money to dispose waste lubricant.
In view of above mentioned, an equipment purifying emulsion has been developed using an electromagnetic technique. Compared with Haffman filter, this equipment can remove most of tiny magnetic particles suspended in emulsion. The basic characteristics of the purification equipment are that the emulsion to be purified in form of thin film possess a strong magnetic field several times at a low velocity. Therefore, the tiny or super-tiny magnetic particles suspended in emulsion are captured in a short time. This purification equipment has got a national patent (P R China Patent No. ZL94201662.9, 1994) and installed on three 20-roller Sendzimir cold rolling mills at Silicon Steel Strip Plant, Wuhan Iron & Steel Co, 1997 and at Shenyang Strip and Sheet Plant in China. The main purpose of this paper is to analyze the purification mechanism, as well as describe the basic characteristics of the purification equipment structure and its application.
文摘The results of studies of thinning free water-in-oil emulsion films stabilized by solid particles by the Applied Pressure Drop Technique (APDT) are reported. The quasi-equilibrium film thickness achieved by slow increasing the pressure drop was smaller than the rupture thickness obtained by sharp increasing the pressure. It is shown that non-equilibrium films ruptured with thicknesses corresponding to adjustment of the packing of solid particles in the films. It is supposed that the restructuring package is the cause of the earlier breakthrough of the film.
基金the financial support received from National Natural Science Foundation of China(No.31430067 and 31601475)China Postdoctoral Science Foundation funded project(No.2017M610200)Heilongjiang Postdoctoral Foundation(No.LBH-Z17011)
文摘The understanding of the structure morphology of oil-rich emulsion from enzyme-assisted extraction processing(EAEP)was a critical step to break the oil-rich emulsion structure in order to recover oil.Albeit EAEP method has been applied as an alternative way to conventional solvent extraction method,the structure morphology of oil-rich emulsion was still unclear.The current study aimed to investigate the structure morphology of oil-rich emulsion from EAEP using 3 D confocal Raman imaging technique.With increasing the enzymatic hydrolysis duration from 1 to 3 h,the stability of oil-rich emulsion was decreased as visualized in the 3 D confocal Raman images that the protein and oil were mixed together.The subsequent Raman spectrum analysis further revealed that the decreased stability of oil-rich emulsion was due to the protein aggregations via SS bonds or protein-lipid interactions.The conformational transfer in protein indicated the formation of a compact structure.
文摘Biodegradable triblock copolymer PLA/PEG/PLA was synthesized by ring-opening bulk polymerization of D,L-lactide in the presence of poly(ethylene glycol) (PEG), in the molecular structure of which, the length of PEG and PLA chain segments was made to be quite different. Nanoparticles were prepared by using the copolymer via a double emulsion-evaporation technique. The paticles tended to form the configuration like capsules, i.e., the nanocapsules, because of the great size difference in PEG and PLA segments of the copolymer. Insulin, chosen as a model drug, was encapsulated into nanocapsules. The effect of preparation conditions on the size, insulin encapsulation efficiency, and in vitro drug release behavour of the nanoparticles were investigated. The experimental results show that the nanocapsules had a smooth spherical surface and the mean diameter was in the range from 180 nm to 350 nm, and the entrapment of insulin achieved up to 78.4. The drug-loaded nanocapsules released their content continuously, remarkably different from the corresponding micelles which gave a significant initial burst release followed by a slow release.
