目的探索用低强度电流(毫安级)处理碳纤维单丝的实验方法,讨论电热载荷对碳纤维表面物化性质的影响,为碳纤维复合材料电热损伤机制研究提供理论基础。方法采用直流恒流精密电源对T300碳纤维单丝以不同强度的电流通电,利用扫描电子显微镜...目的探索用低强度电流(毫安级)处理碳纤维单丝的实验方法,讨论电热载荷对碳纤维表面物化性质的影响,为碳纤维复合材料电热损伤机制研究提供理论基础。方法采用直流恒流精密电源对T300碳纤维单丝以不同强度的电流通电,利用扫描电子显微镜(SEM)和原子力显微镜(AFM)测试手段分析碳纤维表面形貌和粗糙度的变化,利用X射线光电子能谱(XPS)对电热处理后的碳纤维表面的化学性质进行分析,并得出纤维表面活性的变化。结果经过不同电流强度处理的碳纤维表面发生了明显的变化,2 m A和4 m A处理的纤维表面出现了很多裂纹,且粗糙度随着电流的升高而降低,6 m A处理的纤维表面沟壑被填充且粗糙度稍有上升;随着电流的升高,纤维表面的C含量随之升高,O含量则呈现相反趋势,C—C稍有降低,C—O键降低明显。结论电热载荷对纤维表面的浆料有烧蚀作用,未反应的浆料残留在碳纤维表面,并且使凹槽变浅,粗糙度也有所降低;电热产生的高温反应掉了很多上浆剂成分,使更多的纤维本体裸露出来,更多的羟基转化成了羰基和羧基,而纤维表面活性则稍有增强。展开更多
The pathogenesis and therapeutic treatment of intrauterine adhesions （IUAs） remain unsolved, highlighting the need for stable and effective experimental animal models. In this study, uterine electrocoagulaUon of twe...The pathogenesis and therapeutic treatment of intrauterine adhesions （IUAs） remain unsolved, highlighting the need for stable and effective experimental animal models. In this study, uterine electrocoagulaUon of twenty-one female New Zealand White rabbits was carried out to establish an IUA model. As rabbits have two completely separate uterine horns, each rabbit had its own internal control： one uterine horn was given an electrothermal injury （Group A, n=21）, and the contralateral uterine horn received no treatment and served as the control （Group B, n=21）. The en- dometrial morphology, number of endometrial glands, area of endometrial fibrosis, and number of implanted fetuses were compared between the two groups. In Group A, the numbers of endometrial glands on Days 7 and 14 and the number of implanted fetuses were significantly lower than those in Group B（P〈0.05, P〈0.05, and P〈0.01, respectively）, while the ratio of the area with endometrial stromal fibrosis to the total endometrial area was significantly increased （P〈0.01）. These results suggest that this method of electrothermal injury is effective for the establishment of a rabbit lUA model between 7 and 14 d after surgery.展开更多
文摘目的探索用低强度电流(毫安级)处理碳纤维单丝的实验方法,讨论电热载荷对碳纤维表面物化性质的影响,为碳纤维复合材料电热损伤机制研究提供理论基础。方法采用直流恒流精密电源对T300碳纤维单丝以不同强度的电流通电,利用扫描电子显微镜(SEM)和原子力显微镜(AFM)测试手段分析碳纤维表面形貌和粗糙度的变化,利用X射线光电子能谱(XPS)对电热处理后的碳纤维表面的化学性质进行分析,并得出纤维表面活性的变化。结果经过不同电流强度处理的碳纤维表面发生了明显的变化,2 m A和4 m A处理的纤维表面出现了很多裂纹,且粗糙度随着电流的升高而降低,6 m A处理的纤维表面沟壑被填充且粗糙度稍有上升;随着电流的升高,纤维表面的C含量随之升高,O含量则呈现相反趋势,C—C稍有降低,C—O键降低明显。结论电热载荷对纤维表面的浆料有烧蚀作用,未反应的浆料残留在碳纤维表面,并且使凹槽变浅,粗糙度也有所降低;电热产生的高温反应掉了很多上浆剂成分,使更多的纤维本体裸露出来,更多的羟基转化成了羰基和羧基,而纤维表面活性则稍有增强。
基金Project supported by the Key Research and Development Program of Shandong Province(No.2015GSF118124)the Projects of Medical and Health Technology Development Program in Shandong Province(No.2016WS0369)the National Research and Development Plan(No.2016YFC1000600),China
文摘The pathogenesis and therapeutic treatment of intrauterine adhesions （IUAs） remain unsolved, highlighting the need for stable and effective experimental animal models. In this study, uterine electrocoagulaUon of twenty-one female New Zealand White rabbits was carried out to establish an IUA model. As rabbits have two completely separate uterine horns, each rabbit had its own internal control： one uterine horn was given an electrothermal injury （Group A, n=21）, and the contralateral uterine horn received no treatment and served as the control （Group B, n=21）. The en- dometrial morphology, number of endometrial glands, area of endometrial fibrosis, and number of implanted fetuses were compared between the two groups. In Group A, the numbers of endometrial glands on Days 7 and 14 and the number of implanted fetuses were significantly lower than those in Group B（P〈0.05, P〈0.05, and P〈0.01, respectively）, while the ratio of the area with endometrial stromal fibrosis to the total endometrial area was significantly increased （P〈0.01）. These results suggest that this method of electrothermal injury is effective for the establishment of a rabbit lUA model between 7 and 14 d after surgery.
