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反式聚异戊二烯/有机黏土复合材料的形状记忆性能

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合成橡胶工业 2024年第2期47卷 105-109页

作者：张涛梁玉蓉王龙张政高国伟中北大学材料科学与工程学院太原030051 太原工业学院材料工程系太原030008

以反式聚异戊二烯(TPI)为基体,通过加入有机黏土(OC)制备了TPI/OC纳米复合材料(TPICNs)。通过X射线衍射、差示扫描量热、动态力学分析和扫描电子显微镜等手段分别考察了TPICNs的结晶情况、形状记忆性能、力学性能和微观形貌。结果表明,... 详细信息

以反式聚异戊二烯(TPI)为基体,通过加入有机黏土(OC)制备了TPI/OC纳米复合材料(TPICNs)。通过X射线衍射、差示扫描量热、动态力学分析和扫描电子显微镜等手段分别考察了TPICNs的结晶情况、形状记忆性能、力学性能和微观形貌。结果表明,随着OC用量的增加,TPICNs的结晶度、拉伸强度和形状回复率均先增大后减小;当OC用量为1.2份(质量)时,TPICNs的拉伸强度最大且展现出最好的形状记忆行为;TPICNs断面处结晶颗粒分布均匀。

关键词：反式聚异戊二烯有机黏土硫化特性力学性能结晶度微观形貌形状记忆性能

Effect of arterioportal shunting in radical resection of hilar cholangiocarcinoma

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Chinese Medical Journal 2010年第22期123卷 3217-3219页

作者： CHEN Yong-liang HUANG Zhi-qiang HUANG Xiao-qiang DONG Jia-hong DUAN Wei-dong LIU Zhi-wei ZHANG Xuan liang yu-rong CHEN Ming-yi Department of Hepatobiliary Surgery General Hospital of Chinese People's Liberation Army Beijing 100853 China

Background The resection and reconstruction of the hepatic artery is often required in radical surgery for hilar cholangiocarcinoma. In this study, we report our experience in performing arterioportal shunting as an alternative for the arterial reconstruction. Methods Four patients with hilar cholangiocarcinoma underwent extended left hepatectomy and caudate Iobectomy combined with en bloc resection of the hepatic artery and arterioportal shunting with restriction of the arterial caliber. The efficacy of arterioportal shunting was assessed by computed tomography angiography （CTA）. Results All the four patients recovered uneventfully without any complications. CTA showed a patent shunt and normal liver regeneration. No signs of portal hypertension were found at one year of follow-up. Conclusions Arterioportal shunting with restriction of the arterial caliber appears to be a feasible and safe alternative for the microvascular reconstruction after hepatic artery resection in radical surgery for hilar cholangiocarcinoma.

关键词： arterioportal shunting hilar cholangiocarcinoma restriction of the arterial caliber

Effect of resection following downstaging of unresectable hepatocelluar carcinoma by transcatheter arterial chemoembolization

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Chinese Medical Journal 2012年第2期125卷 197-202页

作者： Shi Xian-jie Jin Xin Wang Mao-qiang Wei Li-xin Ye Hui-yi liang yu-rong Luo Ying Dong Jia-hong Gen Hosp Chinese Peoples Liberat Army Dept Hepatobillary Surg Beijing 100853 Peoples R China Gen Hosp Chinese Peoples Liberat Army Dept Intervent Radiol Beijing 100853 Peoples R China Gen Hosp Chinese Peoples Liberat Army Dept Pathol Beijing 100853 Peoples R China Gen Hosp Chinese Peoples Liberat Army Dept Radiol Beijing 100853 Peoples R China

Background This retrospective study was undertaken to analyze the outcome of hepatic resection in fifty-two patients with unresectable hepatocellular carcinoma （HCC） between January 2004 and December *** Among these fifty-two patients,the mean diameter of the tumor was 7.9 cm （4.4-15.5 cm,median 8.5 cm） prior to the first transcatheter arterial chemoembolization （TACE）.After 1-6 times of TACE （median 2）,the median tumor diameter was reduced to 4.2 cm （0-8.4 cm） prior to *** duration between the last TACE treatment and sequential resection varied from one to six months （median 2.7 months）.Serum α-fetoprotein （AFP） levels were abnormal in thirty-eight out of the fifty-two *** AFP producing HCCs,AFP levels returned to normal （≤400 μg/L） in twenty-five out of thirty-eight *** segmentectomy,multiple hepatic segmentectomy or partial hepatic resection were performed in forty-five patients,two underwent extended left hemihepatectomy,and one underwent right posterior branch portal vein *** patient received a right hemihepatectomy and three had left *** Complete tumor radiological response （CR） occurred in five patients （9.6%）.There were three cases of perioperative mortality in the fifty-two patients （5.8%）.One patient underwent salvaged orthotopic liver transplantation,and twenty-one patients observed tumor recurrence within two *** 1-,3- and 5-year survival rates of the fifty-two patients were 77.0% （n=40）,55.0% （n=29）,and 52.0% （n=28）,*** median survival time after surgery was 49 months （95% confidence interval 7.5-52.7 months）.Conclusions TACE treatment provides a better chance for HCC resection in patients initially diagnosed with unresectable ***,liver resection should be performed once the tumor is downstaged to be compatible for successful resection

关键词： hepatocellular carcinoma tumor downstaging transcatheter arterial chemoembolization hepatectomy

Diagnosis and treatment of fungal infection after liver transplantation

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Chinese Medical Journal 2011年第7期124卷 1015-1017页

作者： SHI Xian-jie LU Shao-cheng HE Lei LU Fang liang yu-rong LUO Ying JI Wen-bin ZHAO Zhi-ming Department of Hepatobiliary Surgery People's Liberation ArmyGeneral Hospital Beijing 100853 China

Background Liver transplantation is the most effective treatment for end-stage liver diseases; however, infections after transplantation can seriously affect the patient＇s health. The aim of this research was to inve... 详细信息

关键词： liver transplantation mycoses diagnosis therap fungal infection

Technical points of total laparoscopic choledochal cyst excision

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Chinese Medical Journal 2013年第5期126卷 884-887页

作者： LV Shao-cheng SHI Xian-jie WANG Hong-guang LU Fang liang yu-rong LUO Ying JI Wen-bin ZHAO Zhi-ming Department of Hcpatobiliary Surgery People's Liberation Army General tlospital Beijing 100853 China

Background Choledochal cyst excision and biliary enteric reconstruction constitute the best therapy for choledochal cyst. And laparoscopy is currently used to cure this disease now. Methods We retrospectively analyzed the clinical data of 34 cases of total laparoscopic choledochal cyst excision between January 2007 and August 2011. All patients underwent in vitro Roux-en-Y hepatoenterostomy. Results All 34 patients underwent successful total laparoscopic choledochal cyst excision. The operation time was 200-360 minutes. The duration of hospital stay was 3-7 days. Follow-up observations lasted 1-56 months. One patient developed an anastomotic stoma stricture, but no other cases had postoperative complications. No patients died. Conclusion Total laparoscopic choledochal cyst excision is safe and feasible.

关键词： laparoscopy choledochal cyst, surgical procedures

Spin-orbit interaction induced Casimir-Lifshitz torque between two-dimensional electron gases

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Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 134-142页

作者： Jia-Nan rong liang Chen Kai Chang State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Mathematics and Physics North China Electric Power UniversityBeijing 102206China School of Physics Zhejiang UniversityHangzhou 310027China College of Materials Science and Opto-electronic Technology University of Chinese Academy of SciencesBeijing 100049China

We investigate theoretically the Casimir interaction between two parallel two-dimensional electron gases(2DEGs)with Rashba and Dresselhaus spin-orbit interactions(SOIs),based on the quantum field *** derive an analytical expression for the polarization tensor and obtain the solution to the motion equation of the electromagnetic(EM)*** calculate the CasimirLifshitz torque(CLT)between two parallel 2DEGs with Rashba and Dresselhaus SOIs,which can be tuned by changing the relative strength between two *** anisotropic Casimir energy between 2DEGs caused by the interplay between the SOIs of 2DEGs offers a new origin of CLT and a new type of optoelectronic device.

关键词： Casimir torque two-dimensional electron gas spin-orbit interaction

Analysis and experimental study on resistance-increasing behavior of composite high efficiency autonomous inflow control device

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Petroleum Science 2024年第2期21卷 1290-1304页

作者： liang-liang Dong yu-Lin Zhang School of Mechatronic Engineering Southwest Petroleum UniversityChengdu610500SichuanChina State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500SichuanChina Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan ProvinceChengdu610500SichuanChina

Bottom water coning is the main reason to reduce the recovery of horizontal bottom water reservoir. By water coning, we mean the oil-water interface changes from a horizontal state to a mound-shaped cone and breaks through to the wellbore. Autonomous inflow control device(AICD) is an important instrument maintain normal production after bottom water coning, however, the resistance increasing ability of the swirl type AICD is insufficient at present, which seriously affects the water control effect. Aiming this problem, this paper designs a multi-stage resistance-increasing and composite type AICD. The separation mechanism of oil-water two phases in this structure, the resistance form of oil-water single phase and the resistance-increasing principle of water phase are analyzed. Establishing the dual-phase multi-stage separation and resistance-increasing model, and verified by measuring the throttling pressure drop and oil-water volume fraction of the AICD, it is found that the composite type AICD has the effect of ICD and AICD at the same time, which can balance the production rate of each well section at the initial stage of production, delay the occurrence of bottom water coning. In the middle and later stages of production, water-blocking can be effectively increased to achieve water control and stable *** structural sensitivity analysis, the influence law of various structural parameters on the water control performance of composite AICD was obtained. The simulation calculation results show that,compared with the existing swirl type AICD, composite AICD has higher sensitivity to moisture content,the water phase throttling pressure drop is increased by 4.5 times on average. The composite AICD is suitable for the entire stage of horizontal well production.

关键词： Water control Flow separation Flow resistance-increasing AICD device Simulation and experiment

反式-1,4-聚异戊二烯/天然橡胶共混硫化胶的结晶行为

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合成橡胶工业 2024年第4期47卷 323-328页

作者：马瑞泽梁玉蓉王龙郑慧文王娜娜苏俊东中北大学材料科学与工程学院太原030051 太原工业学院材料工程系太原030008

通过控制反式-1,4-聚异戊二烯(TPI)与天然橡胶(NR)的配比制备了具有温度感应效应的TPI/NR共混硫化胶。研究表明,NR的加入降低了共混胶的X射线衍射峰强度,减小了其结晶焓和结晶度。随NR用量增加TPI/NR硫化胶的拉伸强度减小、扯断伸长率增... 详细信息

通过控制反式-1,4-聚异戊二烯(TPI)与天然橡胶(NR)的配比制备了具有温度感应效应的TPI/NR共混硫化胶。研究表明,NR的加入降低了共混胶的X射线衍射峰强度,减小了其结晶焓和结晶度。随NR用量增加TPI/NR硫化胶的拉伸强度减小、扯断伸长率增大,断面颗粒物总体呈增多趋势。NR与TPI的相容性良好,共混胶的填料网络分散均匀,储能模量与损耗因子均随NR用量变化而变化。不同配比的共混胶都存在应力作用下的低温固定、高温回弹效应。加入NR对共混胶中β晶型的抑制作用更大,当其用量为30份(质量)时,共混胶中有X射线衍射峰消失,断面颗粒物最少,交联密度达到最大值。

关键词：反式-1,4-聚异戊二烯天然橡胶共混硫化胶结晶行为交联密度

Bilayer Compounded Polytetrafluoroethylene Membrane for Enhanced Oil-Water Emulsion Separation

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Chinese Journal of Polymer Science 2024年第6期42卷 838-850页

作者： yu-liang Yang Tai-Ran Zhang Yan-Ting Han Shao-yun Guo Qin-Gong rong Jia-Bin Shen State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversitySichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing TechnologyChengdu610065China West China Hospital/West China School of Nursing Sichuan UniversityChengdu610041China Shandong Senrong New Materials Co. Ltd.Zibo256401China

In order to achieve efficient and durable oil-water emulsion separation,the membranes possessing high separation efficiency and mechanical strength attract extensive attention and are in great *** present study,a kind of polytetrafluoroethylene(PTFE)-based bilayer membrane was fabricated by electrospinning fibrous PTFE(fPTFE)on an expanded PTFE(ePTFE)*** morphological observation revealed that the fibrous structure of the fPTFE layer could be tailored by controlling the formulation of spinning *** addition of appropriate polyoxyethylene(PEO)would make the fibers in the fPTFE layer finer and more *** a result,the compounded membrane exhibited a small pore size of approximately 1.25µm and a substantial porosity nearing 80%.This led to super-hydrophobicity,characterized by a high water contact angle(WCA)of 149.8°,and facilitated rapid oil *** water-in-oil emulsion separation experiment further confirmed that the compounded membrane not only had a high separation efficiency closing 100%,but such an outstanding separation capacity could be largely retained,either through multiple cycles of use or through strong acid(pH=1),strong alkali(pH=12),or high-temperature(100°C)***,the mechanical behavior of the bilayer membrane was basically contributed by that of each layer in terms of their volume *** significantly,the poor creep resistance of fPTFE layer was suppressed by compounding with ePTFE ***,this study has laid the groundwork for a novel approach to create PTFE-based compounded membranes with exceptional overall characteristics,showing promise for applications in the realm of emulsion separation.

关键词： ePTFE Electrospinning membrane Bilayer compounding Emulsion separation