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表层静电植入与贴伏石墨烯的湿敏聚氨酯纤维制备及其性能 被引量:1
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作者 梁家豪 巫莹柱 +4 位作者 刘海东 黄美林 蔡瑞燕 周俊俭 谢权沛 《纺织学报》 EI CAS CSCD 北大核心 2021年第6期63-70,共8页
为制备性能优良、环保且适合编织的湿敏纤维,采用表层静电植入法,在静电场中将石墨烯快速植入熔融状态的聚氨酯纤维表层,经快速辊压贴伏制备出类羊毛鳞片状、湿度敏感的聚氨酯湿敏纤维。通过对纤维的制备工艺进行优化,同时对纤维的结构... 为制备性能优良、环保且适合编织的湿敏纤维,采用表层静电植入法,在静电场中将石墨烯快速植入熔融状态的聚氨酯纤维表层,经快速辊压贴伏制备出类羊毛鳞片状、湿度敏感的聚氨酯湿敏纤维。通过对纤维的制备工艺进行优化,同时对纤维的结构和性能进行分析。结果表明:聚氨酯湿敏纤维的最佳制备工艺为电极板接收距离为15 cm,电压为45 kV,温度为50℃,植入时间为15 s;当石墨烯质量分数为4.1%时,湿敏纤维的电导率为7.0 S/m,断裂强度为94.9 MPa,断裂伸长率91.5%;该湿敏纤维具有良好的湿度敏感稳定性,在高湿环境下具有良好的电阻敏感性,在低湿下具有更短的响应时间(16 s)和恢复时间(26 s);该湿敏纤维在腐蚀性气体环境和柔性智能电子纺织品上具有广泛的应用潜力。 展开更多
关键词 石墨烯 聚氨酯纤维 湿敏纤维 静电植入 湿度传感 智能纺织品
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Bispectral index-guided sedation in transfemoral transcatheter aortic valve implantation:a retrospective control study
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作者 Wei HE Rong-rong HUANG +3 位作者 Qing-yu SHI Xian-bao LIU Jian-an WANG Min YAN 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2017年第4期353-359,共7页
Objective: Transcatheter aortic valve implantation (TAVI) is a minimally invasive therapy for elderly patients with severe aortic valve stenosis who were refused surgical aortic valve replacement because of the hig... Objective: Transcatheter aortic valve implantation (TAVI) is a minimally invasive therapy for elderly patients with severe aortic valve stenosis who were refused surgical aortic valve replacement because of the high perioperative risk. Traditionally, this procedure has been done under general anesthesia, but more recently local anesthesia and sedation have become popular. This research assessed the effectiveness of transfemoral TAVI under bispectral index (BIS)-guided sedation. Methods: In this single-center retrospective control analysis, clinical data, including demographic characteristics, echocardiography, periprocedural data, and main complications, were collected and assessed in 113 patients undergoing TAVI through the femoral artery under general anesthesia (GA group, n=36) and under BIS-guided sedation (SED group, n=77). Results: The demographic characteristics and echocardi-ographic parameters between the two groups were similar (P〉0.05). Two (2.6%) of patients were moved from BIS-guided sedation to general anesthesia for surgical reasons. Procedures were significantly shorter in the SED group than in the GA group ((127.10±44.43) min vs. (165.90±71.62) min, P=0.004). Patients in the SED group lost less blood and received significantly fewer red blood cells and catecholamines than those in the GA group (5.19% vs. 22.22%, P=0.017 and 67.53% vs. 97.22%, P〈0.001). The length of hospital stay was significantly shorter and there were fewer pulmonary complications in the SED group than in the GA group. Thirty-day mortality was similar between the two groups. Conclusions: BIS-guided sedation is a feasible and safe approach for transfemoral TAVl. The anes- thesiologist should choose the best anesthetic method according to the team's experience. 展开更多
关键词 Transcatheter aortic valve implantation SEDATION Bispectral index
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