High-performance yttrium oxide-phenolic resin(Y_(2)O_(3)-PF)alternating coating was prepared on epoxy resin-based composite material using supersonic plasma spraying and dual-channel powder feeding technique.Y_(2)O_(3...High-performance yttrium oxide-phenolic resin(Y_(2)O_(3)-PF)alternating coating was prepared on epoxy resin-based composite material using supersonic plasma spraying and dual-channel powder feeding technique.Y_(2)O_(3)-coated PF(Y_(2)O_(3)/PF)powder was firstly sprayed onto the substrate,forming a transition layer,and then the spherical Y_(2)O_(3) powder and Y_(2)O_(3)/PF powder were alternately deposited to form the composite alternating coating.Results show that the alternating coating is mainly composed of deposited Y_(2)O_(3)/PF powder.The bonding strength between coating and substrate is as high as 26.48 MPa with the single-test maximum bonding strength of 28.10 MPa,and shear strength reaches 24.30 MPa.Additionally,the heat transfer effect caused by external Y_(2)O_(3) particles gradually softens and even melts PF,thus effectively avoiding the damage of high temperature to molecular structure and thereby promoting the crosslinking and curing effects of resin during the deposition process.In the meantime,the unmelted Y_(2)O_(3) powder results in the shot peening effect,which washes out and eliminates the powder particles with inferior deposition effect,ultimately improving the physical and chemical properties of the alternating coating.展开更多
Objective: to study the characteristics of pain degree in children aged 1-12 within 24 hours after day surgery, record and analyze the factors related to postoperative pain in children, and provide reference for the p...Objective: to study the characteristics of pain degree in children aged 1-12 within 24 hours after day surgery, record and analyze the factors related to postoperative pain in children, and provide reference for the prediction and prevention of postoperative pain in children. Methods: the demographic characteristics, surgical and anesthesia information, and postoperative pain assessment scores of 170 children aged 1-12 who underwent day surgery in the day surgery center of Deyang people's hospital from July 2019 to October 2020 were collected. The risk factors of postoperative pain in children after day surgery were screened by statistical analysis. Results: the study of 170 cases showed that the immediate pain score of concealed penis was 7.60±1.34 points and 3.04±1.01 points 24 hours after operation. 24 h after traditional inguinal hernia surgery, the pain score was 2.98±1.07, which was more severe than other parts of the surgery, with statistical significance (P=0.001, P<0.05). Univariate analysis showed that operative site and operative time might be correlated with postoperative pain. Multivariate regression analysis showed that surgical site and longer operation time were the risk factors for the maximum pain degree in children after day surgery. Conclusion: there are different degrees of pain after day surgery in children, among which the postoperative pain degree of posterior coronal sulcus and inguinal incision is more serious than other parts. Traditional open surgery and longer operation time are risk factors for pain after day surgery in children.展开更多
基金National Natural Science Foundation of China(51665030)Research Project of Gansu Province,China(2016A-012)The Natural Science Foundation of Gansu Province,China(17JR5RA114)
基金National Natural Science Foundation of China(52130509,52275211,52075542)Supported by 145 Project+1 种基金Science and Technology New Star Project of Shaanxi Innovation Capability Support Program(2021KJXX-38)China Postdoctoral Science Foundation(2021M693883)。
文摘High-performance yttrium oxide-phenolic resin(Y_(2)O_(3)-PF)alternating coating was prepared on epoxy resin-based composite material using supersonic plasma spraying and dual-channel powder feeding technique.Y_(2)O_(3)-coated PF(Y_(2)O_(3)/PF)powder was firstly sprayed onto the substrate,forming a transition layer,and then the spherical Y_(2)O_(3) powder and Y_(2)O_(3)/PF powder were alternately deposited to form the composite alternating coating.Results show that the alternating coating is mainly composed of deposited Y_(2)O_(3)/PF powder.The bonding strength between coating and substrate is as high as 26.48 MPa with the single-test maximum bonding strength of 28.10 MPa,and shear strength reaches 24.30 MPa.Additionally,the heat transfer effect caused by external Y_(2)O_(3) particles gradually softens and even melts PF,thus effectively avoiding the damage of high temperature to molecular structure and thereby promoting the crosslinking and curing effects of resin during the deposition process.In the meantime,the unmelted Y_(2)O_(3) powder results in the shot peening effect,which washes out and eliminates the powder particles with inferior deposition effect,ultimately improving the physical and chemical properties of the alternating coating.
文摘Objective: to study the characteristics of pain degree in children aged 1-12 within 24 hours after day surgery, record and analyze the factors related to postoperative pain in children, and provide reference for the prediction and prevention of postoperative pain in children. Methods: the demographic characteristics, surgical and anesthesia information, and postoperative pain assessment scores of 170 children aged 1-12 who underwent day surgery in the day surgery center of Deyang people's hospital from July 2019 to October 2020 were collected. The risk factors of postoperative pain in children after day surgery were screened by statistical analysis. Results: the study of 170 cases showed that the immediate pain score of concealed penis was 7.60±1.34 points and 3.04±1.01 points 24 hours after operation. 24 h after traditional inguinal hernia surgery, the pain score was 2.98±1.07, which was more severe than other parts of the surgery, with statistical significance (P=0.001, P<0.05). Univariate analysis showed that operative site and operative time might be correlated with postoperative pain. Multivariate regression analysis showed that surgical site and longer operation time were the risk factors for the maximum pain degree in children after day surgery. Conclusion: there are different degrees of pain after day surgery in children, among which the postoperative pain degree of posterior coronal sulcus and inguinal incision is more serious than other parts. Traditional open surgery and longer operation time are risk factors for pain after day surgery in children.
