目的评价聚合瓷纤维桩核与玻璃纤维桩核的抗折强度。方法选择2012年1月至2013年1月广东医学院附属深圳南山医院口腔科门诊因牙周病拔除的20颗根长相似的上颌中切牙,随机分为聚合瓷纤维桩组和玻璃纤维桩组,每组各10颗。根管治疗后切除牙...目的评价聚合瓷纤维桩核与玻璃纤维桩核的抗折强度。方法选择2012年1月至2013年1月广东医学院附属深圳南山医院口腔科门诊因牙周病拔除的20颗根长相似的上颌中切牙,随机分为聚合瓷纤维桩组和玻璃纤维桩组,每组各10颗。根管治疗后切除牙冠,聚合瓷纤维桩组采用牙周固位纤维增强的Adoro聚合瓷纤维桩核修复,玻璃纤维桩组采用Para Post Taper Lux玻璃纤维桩核修复。两组样本进行抗折强度测试,记录折断模式及所加载的最大负荷。结果聚合瓷纤维桩组牙齿折裂时负荷为(593.0±71.01)N,玻璃纤维桩组为(645.4±63.63)N,两组差异无统计学意义(t=1.737,P>0.05)。两组的折裂位置大部分发生于牙根颈1/3处,分布差异无统计学意义(χ2=1.25,P>0.05)。结论聚合瓷纤维桩核系统与玻璃纤维桩核系统的抗折强度和折裂位置分布相似,聚合瓷纤维桩核系统应用于临床的修复效果尚有待进一步观察。展开更多
Si3N4 ceramic was prepared with pyrolyzing ceramic precursor of UV cured multi thiol-vinyl silizane.The results of in-suit FTIR show that thiol-vinyl silizane curing system was polymerized rapidly with a little photoi...Si3N4 ceramic was prepared with pyrolyzing ceramic precursor of UV cured multi thiol-vinyl silizane.The results of in-suit FTIR show that thiol-vinyl silizane curing system was polymerized rapidly with a little photoinitiator.The photopolymerization rate was promoted,but the final vinyl bond conversion was depressed with enhancing the functionality of thiol group.The results of DMA and TGA show that Tg of the copolymer films of thiol-vinyl silizan cured by UV was elevated,however,the maxiumu rate of mass loss was decreased with increasing the functionality of thiol group.The ceramic yield was determined by the composition of copolymer and was independent of the thiol functionality.A majority of Si3N4 microcrystalline was obtained after pyrolyzing at 1400 ℃ for 15 h in N2 atmosphere.展开更多
All-solid-state Li-ion batteries(ASSLIBs)have been widely studied to achieve Li-ion batteries(LIBs)with high safety and energy density.Recent reviews and experimental papers have focused on methods that improve the io...All-solid-state Li-ion batteries(ASSLIBs)have been widely studied to achieve Li-ion batteries(LIBs)with high safety and energy density.Recent reviews and experimental papers have focused on methods that improve the ionic conductivity,stabilize the electrochemical performance,and enhance the electrolyte/electrode interfacial compatibility of several solid-state electrolytes(SSEs),including oxides,sulfides,composite and gel electrolytes,and so on.Garnet-structured Li_(7)La_(3)Zr_(2)O_(12)(LLZO)is highly regarded an SSE with excellent application potential.However,this type of electrolyte also possesses a number of disadvantages,such as low ionic conductivity,unstable cubic phase,and poor interfacial compatibility with anodes/cathodes.The benefits of LLZO have urged many researchers to explore effective solutions to overcome its inherent limitations.Herein,we review recent developments on garnet-structured LLZO and provide comprehensive insights to guide the development of garnet-structured LLZO-type electrolytes.We not only systematically and comprehensively discuss the preparation,element doping,structure,stability,and interfacial improvement of LLZOs but also provide future perspectives for these materials.This review expands the current understanding on advanced solid garnet electrolytes and provides meaningful guidance for the commercialization of ASSLIBs.展开更多
文摘目的评价聚合瓷纤维桩核与玻璃纤维桩核的抗折强度。方法选择2012年1月至2013年1月广东医学院附属深圳南山医院口腔科门诊因牙周病拔除的20颗根长相似的上颌中切牙,随机分为聚合瓷纤维桩组和玻璃纤维桩组,每组各10颗。根管治疗后切除牙冠,聚合瓷纤维桩组采用牙周固位纤维增强的Adoro聚合瓷纤维桩核修复,玻璃纤维桩组采用Para Post Taper Lux玻璃纤维桩核修复。两组样本进行抗折强度测试,记录折断模式及所加载的最大负荷。结果聚合瓷纤维桩组牙齿折裂时负荷为(593.0±71.01)N,玻璃纤维桩组为(645.4±63.63)N,两组差异无统计学意义(t=1.737,P>0.05)。两组的折裂位置大部分发生于牙根颈1/3处,分布差异无统计学意义(χ2=1.25,P>0.05)。结论聚合瓷纤维桩核系统与玻璃纤维桩核系统的抗折强度和折裂位置分布相似,聚合瓷纤维桩核系统应用于临床的修复效果尚有待进一步观察。
文摘Si3N4 ceramic was prepared with pyrolyzing ceramic precursor of UV cured multi thiol-vinyl silizane.The results of in-suit FTIR show that thiol-vinyl silizane curing system was polymerized rapidly with a little photoinitiator.The photopolymerization rate was promoted,but the final vinyl bond conversion was depressed with enhancing the functionality of thiol group.The results of DMA and TGA show that Tg of the copolymer films of thiol-vinyl silizan cured by UV was elevated,however,the maxiumu rate of mass loss was decreased with increasing the functionality of thiol group.The ceramic yield was determined by the composition of copolymer and was independent of the thiol functionality.A majority of Si3N4 microcrystalline was obtained after pyrolyzing at 1400 ℃ for 15 h in N2 atmosphere.
基金financially supported by the National Natural Science Foundation of China(Nos.21701083 and 51801078)the Zhenjiang Key Laboratory of Marine Power Equipment Performance(No.SS2018006)+1 种基金the Postgraduate Research&Practice Innovation Program of Jiangsu Province,China(Nos.SJCX19_0612 and KYCX20_3137)the Project of Jiangsu University(High-Tech Ship)Collaborative Innovation Center(No.2019,1174871801-11).
文摘All-solid-state Li-ion batteries(ASSLIBs)have been widely studied to achieve Li-ion batteries(LIBs)with high safety and energy density.Recent reviews and experimental papers have focused on methods that improve the ionic conductivity,stabilize the electrochemical performance,and enhance the electrolyte/electrode interfacial compatibility of several solid-state electrolytes(SSEs),including oxides,sulfides,composite and gel electrolytes,and so on.Garnet-structured Li_(7)La_(3)Zr_(2)O_(12)(LLZO)is highly regarded an SSE with excellent application potential.However,this type of electrolyte also possesses a number of disadvantages,such as low ionic conductivity,unstable cubic phase,and poor interfacial compatibility with anodes/cathodes.The benefits of LLZO have urged many researchers to explore effective solutions to overcome its inherent limitations.Herein,we review recent developments on garnet-structured LLZO and provide comprehensive insights to guide the development of garnet-structured LLZO-type electrolytes.We not only systematically and comprehensively discuss the preparation,element doping,structure,stability,and interfacial improvement of LLZOs but also provide future perspectives for these materials.This review expands the current understanding on advanced solid garnet electrolytes and provides meaningful guidance for the commercialization of ASSLIBs.
