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The Evaluation on Biological Properties of Carboxymethyl-chitosan and Carboxymethyl-chitin

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Journal of Ocean University of China 2008年第4期7卷 404-410页

作者： chang jing liu wanshun han baoqin liu bing College of Marine Life Sciences Ocean University of China Qingdao 266003P R. China

Carboxymethyl-chitosan and carboxymethyl-chitin were prepared with the methods developed in our laboratory. The DS （degree of substitution） and DD （degree of deacetylation） of the carboxymethyl-chitosan were 103.14% and 97.18% respectively, while the DS of the carboxymethyl-chitin was 96.37%. Their effects on human fibroblasts, intradermal irritation test, in vitro and vivo degradability, and biocompatibility were evaluated. The results indicate that the polysaccharides at low concentrations can facilitate the growth of human fibroblasts and the carboxymethyl-chitosan at 100 μg mL^-1 is the most effective. The polysaccharides at higher concentrations, however, inhibit the growth of fibroblasts. The PII （Primary Irritation Index） values of CM-chitosan and CM-chitin are both 0.0, which shows that they have no irritation reaction. Both of the polysaccharides show good degradability and biocompatibility. Carboxymethyl-chitin degrades faster in vitro than carboxymethyl-chitosan. The latter, however, has no inflammatory reaction after being implanted in vivo for 7 d and shows better biocompatibility. This study may provide a scientific basis for the use of earboxymethyl-ehitosan and carboxymethyl-chitin as biomaterials.

关键词： carboxymethyl-chitosan (CM-chitosan) carboxymethyl-chitin (CM-chitin) biocompatibility biodegradability

Effects of Carboxymethyl-Chitosan on Wound Healing in vivo and in vitro

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Journal of Ocean University of China 2011年第4期10卷 369-378页

作者： PENG Sikai liu wanshun han baoqin chang jing LI Minyu ZHI Xuan College of Marine Life Sciences Ocean University of ChinaQingdao 266003P.R.China

Effects of carboxymethyl-chitosan with different molecular weights on wound healing were investigated in vivo and in vitro.A second degree burn model was performed in rats and the accelerative effects of carboxymethyl-chitosan on wound repair were *** of transforming growth factor(TGF)-β1,interleukin(IL)-6 and matrix metalloproteinase(MMP)-1 in wounds were determined by enzyme-linked immunosorbent assay(ELISA).In vitro study evaluated the influence of carboxy-methyl-chitosan on cytokines secretion of fibroblasts and *** vivo results showed that carboxymethyl-chitosan effec-tively accelerated the wound healing process in burned rats(Phanced phagocytosis ability of macrophages,and in-creased its tumor necrosis factor(TNF)-α *** conclusion,carboxymethyl-chitosan promoted wound healing by activating macrophages,accelerating fibroblasts growth and exerting considerable effects on the secretion of a series of cytokines.

关键词： carboxymethyl-chitosan wound healing fibroblasts macrophages cytokines

Searching for^(76)Ge neutrinoless double beta decay with the CDEX-1B experiment

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Chinese Physics C 2024年第10期48卷 11-22页

作者： bing-Tao Zhang Jun-Zheng Wang Li-Tao Yang Qian Yue Ke-Jun Kang Yuan-jing Li Hai-Peng An C.Greeshma Jian-Ping chang Yun-Huan Chen Jian-Ping Cheng Wen-han Dai Zhi Deng chang-Hao Fang Xin-Ping Geng Hui Gong Qiu-Ju Guo Xu-Yuan Guo Li He Sheng-Ming He Jin-Wei Hu han-Xiong Huang Tu-Chen Huang Hai-Tao Jia Xi Jiang S.Karmakar Hao-Bin Li Jian-Min Li Jin Li Qian-Yun Li Ren-Ming-Jie Li Xue-Qian Li Yu-Lan Li Yi-Fan Liang Bin Liao Fong-Kay Lin Shin-Ted Lin Jia-Xuan liu Shu-Kui liu Yan-Dong liu Yu liu Yuan-Yuan liu Zhong-Zhi liu Hao Ma Yu-Cai Mao Qi-Yuan Nie Jin-Hua Ning Hui Pan Ning-Chun Qi Jie Ren Xi-Chao Ruan Ze She Manoj Kumar Singh Tian-Xi Sun chang-Jian Tang Wei-You Tang Yang Tian Guang-Fu Wang Li Wang Qing Wang Yu-Feng Wang Yun-Xiang Wang Henry-Tsz-King Wong Shi-Yong Wu Yu-Cheng Wu Hao-Yang Xing Rui Xu Yin Xu Tao Xue Yu-Lu Yan Nan Yi Chun-Xu Yu Hai-Jun Yu Jian-Feng Yue Ming Zeng Zhi Zeng Feng-Shou Zhang Lei Zhang Zhen-Hua Zhang Zhen-Yu Zhang Kang-Kang Zhao Ming-Gang Zhao Ji-Fang Zhou Zu-Ying Zhou jing-Jun Zhou Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and Department of Engineering Physics Tsinghua UniversityBeijing 100084 Department of Physics Tsinghua UniversityBeijing 100084 Institute of Physics Academia SinicaTaipei 11529 NUCTECH Company Beijing 100084 YaLong River Hydropower Development Company Chengdu 610051 College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875 College of Physics Sichuan UniversityChengdu 610065 School of Physics Peking UniversityBeijing 100871 Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413 Sino-French Institute of Nuclear and Technology Sun Yat-sen UniversityZhuhai 519082 School of Physics Nankai UniversityTianjin 300071 Department of Physics Banaras Hindu UniversityVaranasi 221005 Department of Physics Beijing Normal UniversityBeijing 100875

We operated a p-type point contact high purity germanium(PPCGe)detector(CDEX-1B,1.008 kg)in the China Jinping Underground Laboratory(CJPL)for 500.3 days to search for neutrinoless double beta(0νββ)decay of^(76)Ge.A total of 504.3 kg⋅day effective exposure data was *** anti-coincidence and the multi/single-site event(MSE/SSE)discrimination methods were used to suppress the background in the energy region of interest(ROI,1989–2089 keV for this work)with a factor of 23.A background level of 0.33 counts/(keV⋅kg⋅yr)was *** lower limit on the half life of^(76)Ge 0νββdecay was constrained as T_(1/2)^(0ν)>1.0×10^(23)yr(90%C.L.),corresponding to the upper limits on the effective Majorana neutrino mass:<3.2–7.5 eV.

关键词： neutrinoless double beta decay CDEX point-contact germanium detector ^(76)Ge

The In-Flight Realtime Trigger and Localization Software of GECAM

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Research in Astronomy and Astrophysics 2024年第10期24卷 11-24页

作者： Xiao-Yun Zhao Shao-Lin Xiong Xiang-Yang Wen Xin-Qiao Li Ce Cai Shuo Xiao Qi Luo Wen-Xi Peng Dong-Ya Guo Zheng-Hua An Ke Gong Jin-Yuan Liao Yan-Qiu Zhang Yue Huang Lu Li Xing Wen Fei Zhang jing Duan Chen-Wei Wang Dong-Li Shi Peng Zhang Qi-Bin Yi Chao-Yang Li Yan-bing Xu Xiao-Hua Liang Ya-Qing liu Da-Li Zhang Xi-Lei Sun Fan Zhang Gang Chen Huan-Yu Wang Sheng Yang Xiao-jing liu Min Gao Mao-Shun Li Jin-Zhou Wang Xing Zhou Yi Zhao Wang-Chen Xue Chao Zheng Jia-Cong liu Xing-Bo han Jin-Ling Qi Jia Huang Ke-Ke Zhang Can Chen Xiong-Tao Yang Dong-Jie Hou Yu-Sa Wang Rui Qiao Xiang Ma Xiao-Bo Li Ping Wang Xin-Ying Song Li-Ming Song Shi-Jie Zheng bing Li Hong-Mei Zhang Yue Zhu Wei Chen Jian-Jian He Zhen Zhang Jin Hou Hong-Jun Wang Yan-Chao Hao Xiang-Yu Wang Zong-Yuan Yang Zhi-Long Wen Zhi chang Yuan-Yuan Du Rui Gao Xiao-Fei Lan Yan-Guo Li Gang Li Xu-Fang Li Fang-Jun Lu Hong Lu Bin Meng Feng Shi Hui Wang Hui-Zhen Wang Yu-Peng Xu Jia-Wei Yang Xue-Juan Yang Shuang-Nan Zhang Chao-Yue Zhang Cheng-Mo Zhang Zhi-Cheng Tang Cheng Cheng Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China School of Information Science and Technology Southwest Jiaotong UniversityChengdu 611756China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Physics and Space Science College China West Normal UniversityNanchong 637002China Department of Astronomy Beijing Normal UniversityBeijing 100875China Innovation Academy for Microsatellites of CAS Shanghai 201203China changchun University of Science and Technology Changchun 130022China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

Realtime trigger and localization of bursts are the key functions of GECAM,an all-sky gamma-ray monitor launched on 2020 December *** developed a multifunctional trigger and localization software operating in the CPU of the GECAM Electronic *** onboard software has the following features:high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation,dedicated localization algorithm optimized for both short and long bursts,and low time latency of the trigger information which is downlinked through the Global Short Message Communication service of the global BeiDou navigation *** paper provides a detailed description of the design and development of the trigger and localization software system for *** covers the general design,workflow,the main functions,and the algorithms used in the *** paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube,as well as an overview of the performance for real celestial bursts during its in-orbit operation.

关键词： telescopes instrumentation:detectors methods:observational

CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun chang Yue chang Zhe chang Xinyuan chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi Pietro Chimenti Wen han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi Ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beihang University Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal University Beijing Brown University ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced Science and Technology Beijing China Institute of Atomic Energy Beijing China Jiliang University HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and Technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East China University Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

一种海洋琼胶酶的分离纯化、酶学性质研究及降解产物分析

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微生物学报 2009年第7期49卷 896-901页

作者：解卉韩宝芹董文杨艳常菁彭燕飞刘万顺中国海洋大学海洋生命学院青岛266003

【目的】对海洋Agarivorans albusQM38菌株所产琼胶酶的纯化工艺和酶学性质进行了研究。【方法】发酵液通过离心、(NH4)2SO4盐析、DEAE-Sepharose Fast Flow阴离子交换层析、Sephacryl S-100凝胶过滤等纯化步骤得到SDS-PAGE电泳级纯酶,... 详细信息

【目的】对海洋Agarivorans albusQM38菌株所产琼胶酶的纯化工艺和酶学性质进行了研究。【方法】发酵液通过离心、(NH4)2SO4盐析、DEAE-Sepharose Fast Flow阴离子交换层析、Sephacryl S-100凝胶过滤等纯化步骤得到SDS-PAGE电泳级纯酶,并用质谱对酶的降解产物进行分析。【结果】得到琼胶酶A,纯化倍数为17.6倍,收率为15.21%,SDS-PAGE测定其分子量为127.8 kDa。对琼胶酶A进行了进一步的性质分析,其最适反应温度为35℃,最适反应pH为7.6,最适底物浓度为0.9%,多数金属离子为其活性抑制剂。琼胶酶A的降解产物经质谱分析主要为四糖和六糖。【结论】从菌株QM38的发酵液中纯化得到的琼胶酶A具有降解凝胶态琼胶的能力,其分子量与以往报道过的琼胶酶不同。

关键词：琼胶酶分离纯化性质降解产物分析

Prognostic significance of regional lymphadenectomy in T1b gallbladder cancer:Results from 24 hospitals in China

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World Journal of Gastrointestinal Surgery 2021年第2期13卷 176-186页

作者： Tai Ren Yong-Sheng Li Xue-Yi Dang Yang Li Zi-Yu Shao Run-Fa Bao Yi-Jun Shu Xu-An Wang Wen-Guang Wu Xiang-Song Wu Mao-Lan Li Hong Cao Kun-Hua Wang Hong-Yu Cai Chong Jin Hui-han Jin Bo Yang Xiao-Qing Jiang Jian-Feng Gu Yun-Fu Cui Zai-Yang Zhang Chun-Fu Zhu Bei Sun Chao-liu Dai Lin-Hui Zheng jing-Yu Cao Zhe-Wei Fei chang-Jun liu bing Li Jun liu Ye-Ben Qian Yi Wang Ya-Wei Hua Xi Zhang chang liu Wan-Yee Lau Ying-Bin liu Department of General Surgery Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China Shanghai Key Laboratory of Biliary Tract Disease Research Shanghai 200092China Department of Biliary-Pancreatic Surgery Renji Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200127China State Key Laboratory for Oncogenes and Related Genes Shanghai 200127China Department of General Surgery Shanxi Provincial Cancer HospitalTaiyuan 030013Shanxi ProvinceChina Department of GI Surgery China-Japan Union Hospital of Jilin UniversityChangchun 130033Jilin ProvinceChina Department of Gastrointestinal and Hernia Surgery The First Affiliated Hospital of Kunming Medical UniversityKunming 650031Yunnan ProvinceChina Department of Hepatobiliary Surgery Nantong Tumor HospitalNantong 226361Jiangsu ProvinceChina Department of General Surgery Taizhou Municipal HospitalTaizhou 318000Jiangsu ProvinceChina Department of Hepatobiliary Surgery Wuxi Second People's HospitalWuxi 214002Jiangsu ProvinceChina Department of General Surgery The First Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325015Zhejiang ProvinceChina Department of Biliary Tract Surgery Second Military Medical UniversitySecondary Military Medical UniversityShanghai 200438China Department of General Surgery Changshu No.1 People’s Hospital Affiliated to Soochow UniversityChangshu 215500Jiangsu ProvinceChina Department of Hepatopancreatobiliary Surgery Second Affiliated Hospital of Harbin Medical UniversityHarbin 150086Heilongjiang ProvinceChina Department of General Surgery Shaoxing Second HospitalShaoxing 312000Zhejiang ProvinceChina Department of HPB Surgery Changzhou No.2 People’s HospitalChangzhou 213003Jiangsu ProvinceChina Department of Pancreatic and Biliary Surgery The First Affiliated Hospital of Harbin Medical UniversityHarbin 150009Heilongjiang ProvinceChina Department of Hepatobiliary Surgery Shengjing Hospital of China Medical UniversityShenyang 1

BACKGROUND Whether regional lymphadenectomy(RL)should be routinely performed in patients with T1b gallbladder cancer(GBC)remains a subject of *** To investigate whether RL can improve the prognosis of patients with T1b *** We studied a multicenter cohort of patients with T1b GBC who underwent surgery between 2008 and 2016 at 24 hospitals in 13 provinces in *** logrank test and Cox proportional hazards model were used to compare the overall survival(OS)of patients who underwent cholecystectomy(Ch)+RL and those who underwent Ch *** investigate whether combined hepatectomy(Hep)improved OS in T1b patients,we studied patients who underwent Ch+RL to compare the OS of patients who underwent combined Hep and patients who did *** Of the 121 patients(aged 61.9±10.1 years),77(63.6%)underwent Ch+RL,and 44(36.4%)underwent Ch ***(9.1%)patients in the Ch+RL group had lymph node *** 5-year OS rate was significantly higher in the Ch+RL group than in the Ch group(76.3%vs 56.8%,P=0.036).Multivariate analysis showed that Ch+RL was significantly associated with improved OS(hazard ratio:0.51;95%confidence interval:0.26-0.99).Among the 77 patients who underwent Ch+RL,no survival improvement was found in patients who underwent combined Hep(5-year OS rate:79.5%for combined Hep and 76.1%for no Hep;P=0.50).CONCLUSION T1b GBC patients who underwent Ch+RL had a better prognosis than those who underwent ***+Ch showed no improvement in prognosis in T1b GBC *** recommended by both the National Comprehensive Cancer Network and Chinese Medical Association guidelines,RL was only performed in 63.6%of T1b GBC *** Ch+RL should be advised in T1b GBC.

关键词： Gallbladder cancer Lymphadenectomy Hepatectomy Staging Prognosis Surgery

Signature Inversion of the Semi-decoupled Band in the Odd-Odd Nucleus ^(170)Ta

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Chinese Physics Letters 2001年第7期18卷 888-890页

作者： DENG Fu-Guo YANG Chun-Xiang SUN Hui-Bin WU Xiao-Guang LU jing-Bin ZHAO Guang-Yi han Guang-bing PENG Zhao-Hua YIN Li-chang WEN Shu-Xian LI Guang-Sheng YUAN Guan-JunZHOU Hong-Yu liu Yun-Zuo ZHU Li-Hua The Key Laboratory of Beam Technology and Materials Modification of Ministry of Education Beijing Normal UniversityBeijing 100875 China Institute of Atomic Energy P.O.Box 275-10Beijing 102413 Institute of Nuclear Technique Shenzhen UniversityShenzhen 518060 Department of Physics Jilin UniversityChangchun 130023 Beijing Radiation Center Beijing 100875

The high-spin states of the odd-odd nucleus 170Ta have been studied by the 150Gd(19F,4n)170Ta reaction at the beam energy of 97 *** α=1 sequence of the semi-decoupled band has been pushed to higher-spin states and the signature inversion point was observed at 19.5ħ.The results are compared with those of the neighboring odd-odd nuclei.

关键词： Inversion neighboring

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铝阳极氧化膜渗透性的电化学阻抗法分析

材料保护 2009年第9期42卷 59-61页

作者：何敬昌彭乔韩兵利刘鹏中石化南京设计院江苏南京210048 大连理工大学化工学院辽宁大连116012 新疆科能石油化工公司新疆库尔勒841000

电化学阻抗谱(EIS)是研究氧化膜渗透性能的有效技术,据此,对磷酸介质中制备的氧化膜在H2O/H2O,0.1mol/LNaCl/H2O,0.1mol/LNaCl/0.1mol/LNaCl体系及0.1mol/LNaCl/H2O体系中不同渗透时间的电化学阻抗谱进行了初步探讨。结果表明:所设计的... 详细信息

电化学阻抗谱(EIS)是研究氧化膜渗透性能的有效技术,据此,对磷酸介质中制备的氧化膜在H2O/H2O,0.1mol/LNaCl/H2O,0.1mol/LNaCl/0.1mol/LNaCl体系及0.1mol/LNaCl/H2O体系中不同渗透时间的电化学阻抗谱进行了初步探讨。结果表明:所设计的铝阳极氧化膜渗透的实际体系可以用(RC)R(QR)R(RC)等效电路来表示;交流阻抗技术可以对磷酸介质中多孔氧化膜的渗透性进行定性分析;在NaCl/H2O体系中,多孔氧化膜的Nyquist谱是典型的Warburg阻抗谱,有明显的扩散特征,这种特征与氧化膜的渗透性紧密相关;在Bode谱高频区,随着渗透时间的增加,氧化膜的阻抗值呈减小趋势,但下降幅度有限,扩散渗透量很小。

关键词：阳极氧化铝合金磷酸体系多孔膜渗透性电化学阻抗分析