Castor oil-based cationic waterborne polyurethane(CWPU)was synthesized by pre-polymer process using castor oil(CO),poly(adipic acid-1,4-succinate diol)(PBA),isophorone diisocyanate(IPDI),and N-methyldiethanolamine(MDE...Castor oil-based cationic waterborne polyurethane(CWPU)was synthesized by pre-polymer process using castor oil(CO),poly(adipic acid-1,4-succinate diol)(PBA),isophorone diisocyanate(IPDI),and N-methyldiethanolamine(MDEA).The influences of the content of CO and MDEA on comprehensive performance and finished fabric properties of cationic waterborne polyurethane was investigated,especially the antibacterial properties of finished fabric.The CWPU latex particle size and its distribution decrease as the content of CO increased from 0wt%to 16.8wt%,and increases afterwards.The CWPU films show much higher thermal stability than cationic waterborne polyurethane without CO.The surface of fabrics was characterized by scanning electron microscope(SEM).The finished fabric surface is much smoother.In addition,the finished fabric with CWPU emulsion has better antibacterial property against E.coli and S.aureus.When MDEA content is 8%,the antibacterial rates of the two kinds of bacteria are 77.3%and 82.2%,respectively.展开更多
Oil saturation was an important parameter of reservoir evaluation, which had important guiding significance for oilfield development. In this paper, the oil saturation of tight oil in G area was studied, and the origi...Oil saturation was an important parameter of reservoir evaluation, which had important guiding significance for oilfield development. In this paper, the oil saturation of tight oil in G area was studied, and the original oil saturation of the study area was studied by using the comprehensive experimental method. The original oil saturation of tight oil in the study area was determined by J function method, rock electricity method and oil-based mud coring method. The results showed that through the comparison of three experimental methods, it could be concluded that the J function method leads to the low value of oil saturation in the study area. The oil-based mud coring method was more suitable for the determination of oil saturation in this area than the other two methods because it needs to meet too many conditions and the calculation results were also low. G area was located in Qili Village, Ordos Basin.展开更多
In this study,a spent palm cooking oil-based mud with an excellent H_(2)S scavenging capability induced by the inclusion of a small quantity of potassium permanganate is formulated and tested for the first time.The mu...In this study,a spent palm cooking oil-based mud with an excellent H_(2)S scavenging capability induced by the inclusion of a small quantity of potassium permanganate is formulated and tested for the first time.The mud formulation,containing the spent palm oil as the continuous phase and water as the dispersed phase,respectively,was stabilized by Span 80 and rhamnolipid biosurfactant as primary and secondary emulsifiers,respectively,while hydrophobic zinc nanoparticles(NPs)were used as weighting agent.The results showed that H_(2)S scavenging capacity at the breakthrough time reached 182.4 g H_(2)S/barrel mud,which increased to 417.9 g H_(2)S/barrel mud at the saturation time,demonstrating the effective H_(2)S scavenging performance of the formulated mud.The spent palm oil-based mud(SPOBM)also showed a good flow behavior that could be well fitted using the Herschel-Bulkley and Casson models.The effect of temperature on the apparent viscosity of the SPOBM has been investigated,and the fitting of the viscosity-temperature data provided an estimate of the activation energy as 23.53 kJ/mol.The findings reported in this article reveal the feasibility of transforming the spent/waste cooking oils into a valuable commodity for formulating greener drilling fluids with acceptable rheology and excellent H_(2)S scavenging performance.展开更多
The role of cold nitrogen gas and oil mist on tool wear and surface roughness is investigated in turning the K424 nickel-base super alloy with Sialon and SiC whisker-reinforced alumina ceramic tools. A new cooling sys...The role of cold nitrogen gas and oil mist on tool wear and surface roughness is investigated in turning the K424 nickel-base super alloy with Sialon and SiC whisker-reinforced alumina ceramic tools. A new cooling system is developed and used to lower the temperature of the compressed nitrogen gas. Experiments are performed in three different cooling/lubrication modes, i.e. the dry cutting, the cold nitrogen gas （CNG）, and the cold nitrogen gas and oil mist （CNGOM）. Experimental results show that the depth-of-cut notching severely limits the tool life in all the cooling/lubrication modes. Compared with the dry cutting, the use of CNG and CNGOMcan yield higher wear rate of depth-of-cut notching and worse surface finish.展开更多
The traditional Chinese furniture evolved as an important part of the Chinese culture and civilization. Alongside design, structure, ornaments, the original finishes applied define the particularities and value of tra...The traditional Chinese furniture evolved as an important part of the Chinese culture and civilization. Alongside design, structure, ornaments, the original finishes applied define the particularities and value of traditional Chinese furniture. This is because wood finishing not only enhances wood natural beauty by colour, gloss and highlighting of wooden texture, but also can be a means of exquisite decoration (e.g. engraved, gilded or painted lacquer works). Chinese lacquer, Tung oil and Chinese wax represent some of the most important finishing materials employed and were, therefore, selected for this study. The paper presents a brief macroscopic, microscopic and FTIR characterization of these materials. These results will be used as starting data in a further study on the ageing properties of these traditional finishing materials, useful for scientific conservation purposes.展开更多
Amino - functional silicone oil was used as a raw material to synthesize antimicrobial agent by means of alkyla-tion. Through synthetically judging every possible influential factor, a new method was developed to synt...Amino - functional silicone oil was used as a raw material to synthesize antimicrobial agent by means of alkyla-tion. Through synthetically judging every possible influential factor, a new method was developed to synthesize antimicrobial agent CL under moderate condition. Then, antimicrobial agent CL was emulsified with surfactants AEO - 9 and AEO - 3 in appropriate proportion. Practical properties of antimicrobial fabric were tested.展开更多
文摘Castor oil-based cationic waterborne polyurethane(CWPU)was synthesized by pre-polymer process using castor oil(CO),poly(adipic acid-1,4-succinate diol)(PBA),isophorone diisocyanate(IPDI),and N-methyldiethanolamine(MDEA).The influences of the content of CO and MDEA on comprehensive performance and finished fabric properties of cationic waterborne polyurethane was investigated,especially the antibacterial properties of finished fabric.The CWPU latex particle size and its distribution decrease as the content of CO increased from 0wt%to 16.8wt%,and increases afterwards.The CWPU films show much higher thermal stability than cationic waterborne polyurethane without CO.The surface of fabrics was characterized by scanning electron microscope(SEM).The finished fabric surface is much smoother.In addition,the finished fabric with CWPU emulsion has better antibacterial property against E.coli and S.aureus.When MDEA content is 8%,the antibacterial rates of the two kinds of bacteria are 77.3%and 82.2%,respectively.
文摘Oil saturation was an important parameter of reservoir evaluation, which had important guiding significance for oilfield development. In this paper, the oil saturation of tight oil in G area was studied, and the original oil saturation of the study area was studied by using the comprehensive experimental method. The original oil saturation of tight oil in the study area was determined by J function method, rock electricity method and oil-based mud coring method. The results showed that through the comparison of three experimental methods, it could be concluded that the J function method leads to the low value of oil saturation in the study area. The oil-based mud coring method was more suitable for the determination of oil saturation in this area than the other two methods because it needs to meet too many conditions and the calculation results were also low. G area was located in Qili Village, Ordos Basin.
基金supported by the Deanship of Research Oversight and Coordination(DROC)at King Fahd University of Petroleum and Minerals(KFUPM)in terms of Research Grant#DF191027.
文摘In this study,a spent palm cooking oil-based mud with an excellent H_(2)S scavenging capability induced by the inclusion of a small quantity of potassium permanganate is formulated and tested for the first time.The mud formulation,containing the spent palm oil as the continuous phase and water as the dispersed phase,respectively,was stabilized by Span 80 and rhamnolipid biosurfactant as primary and secondary emulsifiers,respectively,while hydrophobic zinc nanoparticles(NPs)were used as weighting agent.The results showed that H_(2)S scavenging capacity at the breakthrough time reached 182.4 g H_(2)S/barrel mud,which increased to 417.9 g H_(2)S/barrel mud at the saturation time,demonstrating the effective H_(2)S scavenging performance of the formulated mud.The spent palm oil-based mud(SPOBM)also showed a good flow behavior that could be well fitted using the Herschel-Bulkley and Casson models.The effect of temperature on the apparent viscosity of the SPOBM has been investigated,and the fitting of the viscosity-temperature data provided an estimate of the activation energy as 23.53 kJ/mol.The findings reported in this article reveal the feasibility of transforming the spent/waste cooking oils into a valuable commodity for formulating greener drilling fluids with acceptable rheology and excellent H_(2)S scavenging performance.
文摘The role of cold nitrogen gas and oil mist on tool wear and surface roughness is investigated in turning the K424 nickel-base super alloy with Sialon and SiC whisker-reinforced alumina ceramic tools. A new cooling system is developed and used to lower the temperature of the compressed nitrogen gas. Experiments are performed in three different cooling/lubrication modes, i.e. the dry cutting, the cold nitrogen gas （CNG）, and the cold nitrogen gas and oil mist （CNGOM）. Experimental results show that the depth-of-cut notching severely limits the tool life in all the cooling/lubrication modes. Compared with the dry cutting, the use of CNG and CNGOMcan yield higher wear rate of depth-of-cut notching and worse surface finish.
文摘The traditional Chinese furniture evolved as an important part of the Chinese culture and civilization. Alongside design, structure, ornaments, the original finishes applied define the particularities and value of traditional Chinese furniture. This is because wood finishing not only enhances wood natural beauty by colour, gloss and highlighting of wooden texture, but also can be a means of exquisite decoration (e.g. engraved, gilded or painted lacquer works). Chinese lacquer, Tung oil and Chinese wax represent some of the most important finishing materials employed and were, therefore, selected for this study. The paper presents a brief macroscopic, microscopic and FTIR characterization of these materials. These results will be used as starting data in a further study on the ageing properties of these traditional finishing materials, useful for scientific conservation purposes.
文摘Amino - functional silicone oil was used as a raw material to synthesize antimicrobial agent by means of alkyla-tion. Through synthetically judging every possible influential factor, a new method was developed to synthesize antimicrobial agent CL under moderate condition. Then, antimicrobial agent CL was emulsified with surfactants AEO - 9 and AEO - 3 in appropriate proportion. Practical properties of antimicrobial fabric were tested.
