对一系列磺酸盐双子表面活性剂的泡沫性能和油水界面张力进行了测试,并将磺酸盐双子表面活性剂与3~#甜菜碱表面活性剂和5~#黏弹性非离子表面活性剂进行复配,筛选出高稳泡超低界面张力泡沫体系。当磺酸盐双子表面活性剂DS14-2-14与3~#、...对一系列磺酸盐双子表面活性剂的泡沫性能和油水界面张力进行了测试,并将磺酸盐双子表面活性剂与3~#甜菜碱表面活性剂和5~#黏弹性非离子表面活性剂进行复配,筛选出高稳泡超低界面张力泡沫体系。当磺酸盐双子表面活性剂DS14-2-14与3~#、5~#表面活性剂的质量比为5∶3∶2,复配表面活性剂的质量分数为0.4%时,最大起泡体积为500 m L,半衰期为26.84 min,平衡时的油水界面张力为8.9×10^(-3)mN/m。此时泡沫体系具有很强的耐温耐盐性和一定的抗油性。展开更多
Pavement performance and economic efficiency are researched on the perpetual test pavement of Yijiang-Suzhou Express Highway in Jiangsu province, China. Test sections were continuously monitored. The conditions and de...Pavement performance and economic efficiency are researched on the perpetual test pavement of Yijiang-Suzhou Express Highway in Jiangsu province, China. Test sections were continuously monitored. The conditions and developing laws of deflection, rutting and cracking are compared among the perpetual pavement with the rich binder layer （RBL）, the perpetual pavement without the RBL, and the conventional semi-rigid asphalt pavement in the past eight years after opening for traffic. Economical evaluation is conducted via life cycle cost analysis （LCCA）. Based on the performance comparison and LCCA analysis, sections with the RBL have good crack resistance, but they are not very satisfactory in the aspect of permanent deformation; the conventional semi-rigid asphalt pavement is the least economic one due to requiring more frequent maintenance. Research results show that the perpetual pavement without RBL is a more appropriate structure for the test site.展开更多
Different contents of biodiesel and petrodiesel were incorporated into diesel engine oils. The oxidative stability, detergency and antiwear performance of the formulated diesel oils were evaluated. The results indicat...Different contents of biodiesel and petrodiesel were incorporated into diesel engine oils. The oxidative stability, detergency and antiwear performance of the formulated diesel oils were evaluated. The results indicated that, compared with petrodiesel, biodiesel was more liable to promote oxidation degradation of diesel oils, leading to worse oxidative stability, detergency and antiwear ability of the oils.展开更多
Nanosized copper powders were prepared by a gel-casting method using copper nitrate, acrylamide（AM） and N, N′-methylenebisacrylamide（MBAM） as the main raw materials. The as-prepared copper powders were characteri...Nanosized copper powders were prepared by a gel-casting method using copper nitrate, acrylamide（AM） and N, N′-methylenebisacrylamide（MBAM） as the main raw materials. The as-prepared copper powders were characterized by X-ray diffractometry and scanning electron microscopy, and then added into a 48# industrial white oil. Dispersion and wear properties of the compounded lubricating oil were tested. The results show that the copper powders prepared are of high purity, fine dispersibility with mean particle size of about 60 nm and with a narrow particle size distribution. The nanosized copper powders can be well dispersed in the lubricating oil. The addition of the copper powders obviously improves the anti-wear properties of the lubricating oil owing to their good self-repairing performance. Compared with 48# industrial white lubricating oil, the friction coefficient of GCr15 steel with the compounded oil containing 0.6% copper powders reduces by 0.07 and nearly no wear chippings are found in the scratches of the friction counter parts.展开更多
基金supported by National Natural Science Foundation of China (Grant No.51305298,No.51675379)Tianjin Research Program of Application Foundation and Advanced Technology (Grant No.13JCQNJC04700)~~
文摘从烷基醇酰胺类表面活性剂、磺基甜菜碱类表面活性剂、EO磺酸盐类表面活性剂、氟碳类表面活性剂和十二烷基硫酸纳(SDS)起泡剂中优选出泡膜数小于1的氟碳类表面活性剂和起泡性能优异的SDS复配体系。用Waring Blender法评价起泡剂的泡沫性能。结果表明,JSC-6氟碳表面活性剂的耐油性较好,在含油10%时的泡沫体积为320 m L、析液半衰期2.5 h、综合指数2285.7。SDS与助剂ZC-1复配后,在含油10%时的泡沫体积为330 m L、析液半衰期15 min、综合指数235.7,具有一定的耐油起泡性,但稳定时间短。稳定剂部分水解聚丙烯酰胺使JSC-6体系和SDS体系的稳定性提高,半衰期由36和10 min分别增至126和68 min。在含油饱和度较低时(低于25%),SDS体系起泡能力优异,综合指数高,具有一定优势;而当含油饱和度高于25%时,氟碳表面活性剂则表现出更好的起泡能力和更长的稳定时间。
文摘对一系列磺酸盐双子表面活性剂的泡沫性能和油水界面张力进行了测试,并将磺酸盐双子表面活性剂与3~#甜菜碱表面活性剂和5~#黏弹性非离子表面活性剂进行复配,筛选出高稳泡超低界面张力泡沫体系。当磺酸盐双子表面活性剂DS14-2-14与3~#、5~#表面活性剂的质量比为5∶3∶2,复配表面活性剂的质量分数为0.4%时,最大起泡体积为500 m L,半衰期为26.84 min,平衡时的油水界面张力为8.9×10^(-3)mN/m。此时泡沫体系具有很强的耐温耐盐性和一定的抗油性。
基金The Science and Technology Project of Jiangsu Provincial Communications Department(No.7621000078)
文摘Pavement performance and economic efficiency are researched on the perpetual test pavement of Yijiang-Suzhou Express Highway in Jiangsu province, China. Test sections were continuously monitored. The conditions and developing laws of deflection, rutting and cracking are compared among the perpetual pavement with the rich binder layer （RBL）, the perpetual pavement without the RBL, and the conventional semi-rigid asphalt pavement in the past eight years after opening for traffic. Economical evaluation is conducted via life cycle cost analysis （LCCA）. Based on the performance comparison and LCCA analysis, sections with the RBL have good crack resistance, but they are not very satisfactory in the aspect of permanent deformation; the conventional semi-rigid asphalt pavement is the least economic one due to requiring more frequent maintenance. Research results show that the perpetual pavement without RBL is a more appropriate structure for the test site.
基金the financial support from the Natural Science Foundation of Chongqing(Project NO. CSTC, 2011JJA90020)the Science Foundation for Young Teachers of Logistical Engineering University
文摘Different contents of biodiesel and petrodiesel were incorporated into diesel engine oils. The oxidative stability, detergency and antiwear performance of the formulated diesel oils were evaluated. The results indicated that, compared with petrodiesel, biodiesel was more liable to promote oxidation degradation of diesel oils, leading to worse oxidative stability, detergency and antiwear ability of the oils.
基金Project(51674095)supported by the National Natural Science Foundation of China
文摘Nanosized copper powders were prepared by a gel-casting method using copper nitrate, acrylamide（AM） and N, N′-methylenebisacrylamide（MBAM） as the main raw materials. The as-prepared copper powders were characterized by X-ray diffractometry and scanning electron microscopy, and then added into a 48# industrial white oil. Dispersion and wear properties of the compounded lubricating oil were tested. The results show that the copper powders prepared are of high purity, fine dispersibility with mean particle size of about 60 nm and with a narrow particle size distribution. The nanosized copper powders can be well dispersed in the lubricating oil. The addition of the copper powders obviously improves the anti-wear properties of the lubricating oil owing to their good self-repairing performance. Compared with 48# industrial white lubricating oil, the friction coefficient of GCr15 steel with the compounded oil containing 0.6% copper powders reduces by 0.07 and nearly no wear chippings are found in the scratches of the friction counter parts.
