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Chinese Journal of Polymer Science 2024年第6期42卷 751-765页

作者： Jun-Hao Zhou Li-Ming Tang Key Laboratory of Advanced Materials of Ministry of Education of China Department of Chemical EngineeringTsinghua UniversityBeijing100084China

In this study,a series of hindered urea bond(HUB)containing polyurethane-urea methacrylate prepolymers and a none HUB containing polyurethane methacrylate prepolymer were prepared using isobornyl methacrylate as the reactive diluent via one-pot procedure.The prepolymers were characterized fully by various techniques.Then,their thermosets were fabricated via UV curing in presence of a photo initiator,and their mechanical property and thermal behavior were investigated and compared.Different from the none HUB containing thermoset,the HUB containing thermosets(defined as PUT)could be recycled and reprocessed by hot press under relatively mild conditions with high recovery ratio of mechanical property.Furthermore,zinc oxide(ZnO)nanoparticles were modified with 3-(trimethoxysilyl)propyl methacrylate and the modified ZnO(defined as ZnO-TPM)was dispersed and polymerized into PUT matrix to prepare their nanocomposites.The influence of ZnO-TPM on the mechanical performance of the composites was evaluated,which indicated that the Young’s modulus and tensile strength increased gradually to the maximum values at ZnO-TPM content of 1 wt%and then decreased.The composites also displayed good reprocessability with improved recovery ratio compared to the pure PUT sample.In addition,the composite materials exhibited strong UV absorption capacity,implying their potential application in the circumstance where UV-shielding was required.

关键词： Polyurethane-urea methacrylate Hindered urea bond ZnO nanoparticles reprocessing UV curing

Synthesis of Lignin-based Nonisocyanate Poly(imine-hydroxyurethane)s Networks.Part II:Self-healing,reprocessing,and Degradation

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Paper And Biomaterials 2021年第3期6卷 1-9页

作者： Chao Shen Bailiang Xue Danwei Xue Rui Tang Wei Zhao Xinping Li College of Bioresources Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi'anShaanxi Province710021China Key Laboratory of Pulp and Paper Science&Technology of Ministry of Education Qilu University of Technology(Shandong Academy of Sciences)Ji'nanShandong Provice250353China

This study provides a comprehensive understanding of the polymeric properties of lignin-based non-isocyanate poly(iminehydroxyurethane)s(LNIPUs).The properties of the LNIPUs are affected by changes in the stoichiometric feed ratios of the bis(6-membered cyclic carbonate)(BCC)and levulinate enzymatic hydrolysis lignin(LEHL).The results showed that the LNIPUs exhibited a short relaxation time and excellent thermal repair and degradation properties.With a change in the LEHL content in the LNIPUs to 45.53%,a relaxation time of only 9 s was achieved,and the thermal repair rate of the scratches reached 93%.Furthermore,the tensile strength of the LNIPUs decreased with an increase in the LEHL content after two hot-pressing processes,while a higher than 75% tensile strength was maintained after the second hot-pressing treatment.The LNIPUs exhibited thermoresponsive shape memory property with deformation and shape fixing at 80℃.In addition,the as-synthesized LNIPUs were soluble in ethylene glycol in the absence of any organic solvents.This work demonstrates the synthesis of LNIPUs with self-healing,reprocessing,shape memory,and degradation properties.

关键词： lignin non-isocyanate polyurethane self-healing reprocessing

Single-use duodenoscopes for the prevention of endoscopic retrograde cholangiopancreatography -related cross-infection – from bench studies to clinical evidence

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World Journal of Methodology 2022年第3期12卷 122-131页

作者： Andrea Lisotti Pietro Fusaroli Bertrand Napoleon Anna Cominardi Rocco Maurizio Zagari Gastroenterology Unit Hospital of ImolaUniversity of BolognaImola 40026BOItaly Gastroenterology Unit Hôpital privéJean Mermoz-Ramsay Générale de SantéLyon 69008FRFrance Dipertimento Di Scienze Mediche e Chirurgiche Universitàdi BolognaPoliclinico San Orsola MalpighiBologna 40138Italy

BACKGROUND Several strategies have been implemented to reduce or abolish the life-threatening risk of endoscopic retrograde cholangiopancreatography(ERCP)-related multidrug-resistant infections due to duodenoscopes contaminations;among those strategies,serial microbiologic tests,thorough reprocessing schedules,and use of removable scope cap have been adopted,but the potential cross-infection risk was not eliminated.AIM To review available evidence in the field of single-use duodenoscopes(SUD)use for ERCP.METHODS An overview on ongoing clinical studies was also performed to delineate which data will become available in the next future.RESULTS One bench comparative study and four clinical trials performed with EXALT model-D(Boston Scientific Corp.,United States)have been identified.Of them,one is a randomized controlled trial,while the other three studies are prospective single-arm,cross-over studies.Pooled technical success rate(4 studies,368 patients)was 92.9%[95%confidence interval(CI):89.9-95.5;I2:11.8%].Pooled serious adverse event(4 studies,381 patients)rate was 5.9%[3.7%-8.5%;I2:0.0%].CONCLUSION Although few clinical trials are available,evidence is concordant in identifying an absolute feasibility and safety and feasibility for SUD use for ERCP.The expertise and quality of evidence in this field are going to be improved by further large clinical trials;data on cost-effectiveness and environmental impact will be needed for a worldwide spread of SUD use for ERCP.

关键词： Multidrug Resistance Contamination Infection reprocessing Guidelines

Abstinence Following a Motivation-Skill-Desensitization-Mental Energy Intervention for Heroin Dependence: A Three-year Follow-up Result of a Randomized Controlled Trial

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Current Medical Science 2019年第3期39卷 472-482页

作者： Jia-yan CHEN Jin-cong YU Jie-pin CAO Yang XIAO Hong GU Rui-lin ZHONG Fang DING Zeng-zhen WANG Department of Epidemiology and Biostatistics School of Public Health Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China Psychological Health Education and Counseling Center Zhongnan University of Economics and Law Wuhan 430073China School of Nursing Duke University Durham NC 27710 USA Wuhan Shiwu Research Institute of Science on Modem Psychology Wuhan 430062 China Xiangyang Drug Rehabilitation Center Xiangyang 441100 China

The high rate of relapse among heroin users remains a significant public concern in China. In the present study, we utilized a Motivation-Skill-Desensitization-Mental Energy (MSDE) intervention and evaluated its effects on abstinence and mental health. Eighty-nine male heroin users in a drug rehabilitation center were enrolled in the study. The participants in the MSDE intervention group (n=46) received MSDE intervention, which included motivational interviewing, coping skills training, eye movement desensitization and reprocessing, and mindfulness-based psychotherapy. The participants in the control group (h=43) received a series of lectures on skills training. A significant increase in Contemplation Ladder score (P<0.001) and decreases in scores on the Obsessive Compulsive Drug Use Scale (P<0.001), Beck Depression Inventory (P<0.001), and Aggression Questionnaire (P=O.O33) were found immediately after intervention. Compared to the control group, the MSDE intervention group reported significantly higher abstinence rates (P=0.027) and retention rates (P<0.001) at follow-up. Overall, the MSDE intervention, which uses a combined strategy for relapse prevention, could be a promising approach for preventing relapse among heroin users in China.

关键词： heroin dependence relapse prevention motivational interviewing cognitive therapy eye movement desensitization and reprocessing

SpyGlass application for duodenoscope working channel inspection: Impact on the microbiological surveillance

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World Journal of Gastroenterology 2020年第26期26卷 3767-3779页

作者： Tao-Chieh Liu Chen-Ling Peng Hsiu-Po Wang Hsin-Hung Huang Wei-Kuo Chang Division of Gastroenterology Department of Internal MedicineTri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Department of Integrated Diagnostics&Therapeutics National Taiwan University HospitalNational Taiwan University College of MedicineTaipei 10002Taiwan Division of Gastroenterology and Hepatology Department of Internal MedicineNational Taiwan University HospitalNational Taiwan University College of MedicineTaipei 114Taiwan Division of Gastroenterology Cheng Hsin General HospitalNational Defense Medical CenterTaipei 114Taiwan

BACKGROUND Patient-ready duodenoscopes were designed with an assumed contamination rate of less than 0.4%;however,it has been reported that 5.4%of clinically used duodenoscopes remain contaminated with viable high-concern organisms despite following the manufacturer’s instructions.Visual inspection of working channels has been proposed as a quality control measure for endoscope reprocessing.There are few studies related to this issue.AIM To investigate the types,severity rate,and locations of abnormal visual inspection findings inside patient-ready duodenoscopes and their microbiological significance.METHODS Visual inspections of channels were performed in 19 patient-ready duodenoscopes using the SpyGlass visualization system in two endoscopy units of tertiary care teaching hospitals(Tri-Service General Hospital and National Taiwan University Hospital)in Taiwan.Inspections were recorded and reviewed to evaluate the presence of channel scratches,buckling,stains,debris,and fluids.These findings were used to analyze the relevance of microbiological surveillance.RESULTS Seventy-two abnormal visual inspection findings in the 19 duodenoscopes were found,including scratches(n=10,52.6%),buckling(n=15,78.9%),stains(n=14,73.7%),debris(n=14,73.7%),and fluids(n=6,31.6%).Duodenoscopes>12 mo old had a significantly higher number of abnormal visual inspection findings than those≤12 mo old(46 findings vs 26 findings,P<0.001).Multivariable regression analyses demonstrated that the bending section had a significantly higher risk of being scratched,buckled,and stained,and accumulating debris than the insertion tube.Debris and fluids showed a significant positive correlation with microbiological contamination(P<0.05).There was no significant positive Spearman’s correlation coefficient between negative bacterial cultures and debris,between that and fluids,and the concomitance of debris and fluids.This result demonstrated that the presence of fluid and debris was associated with positive cultures,but not negative cultures.Further mult

关键词： Duodenoscope Working channel Visual inspection Microbiological surveillance reprocessing Endoscope reprocessing

Effect of an antioxidant on the life cycle of wood flour/polypropylene composites

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Journal of Forestry Research 2020年第4期31卷 1435-1443页

作者： Haigang Wang Jingfa Zhang Haitao Fu Weihong Wang Qingwen Wang Key Laboratory of Bio-Based Material Science and Technology(Ministry of Education) Northeast Forestry UniversityHarbin 150040People’s Republic of China College of Materials and Energy South China Agricultural UniversityGuangzhou 510642People’s Republic of China

This study assessed the life cycle of biocomposites with antioxidants by repeated processing.The effects of antioxidants on the life cycle of wood flour/polypropylene(PP)composites were determined by analyzing their mechanical and thermal properties.The composites were repeatedly processed for seven times with pelletizing and extruding.An antioxidant,pentaerythritoltetrakys 3-(3,5-ditert-butyl-4-hydroxyphenyl)propionate,was used.The mechanical strength of the biocomposites decreased after reprocessing.Fourier transformed infrared analysis showed that thermo-oxidative aging occurred during reprocessing.The thermal performance of the resulting composites decreased because of reprocessing.Wood flour/PP has a long lifetime and antioxidants can slow the thermo-oxidative and mechanical degradation during reprocessing.

关键词： Wood-plastic composites Polypropylene reprocessing Antioxidant

Suitability of Blends from Virgin and Reprocessed Polylactide: Performance and Energy Valorization Kinet

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Journal of Renewable Materials 2018年第4期6卷 370-382页

作者： O.Gil-Castell J.D.Badia A.Ribes-Greus Instituto de Tecnología de Materiales(ITM) Universitat Politècnica de ValènciaCamino de Vera s/n46022 ValènciaSpain Departament d’Enginyeria Química Escola Tècnica Superior d’EnginyeriaUniversitat de ValènciaAv.de la Universitat s/n46100 BurjassotSpain

A blending strategy of virgin and reprocessed polylactide may be postulated as an alternative to reduce the material cost at industrial level,and as a valorization route to plastic waste management of production scraps.The performance of blends prepared from virgin polylactide and polylactide mechanically reprocessed up to two cycles(PLA-V/R)was assessed in terms of thermo-oxidative stability,morphology,viscoelasticity and thermal kinetics for energetic valorization.PLA-V/R blends showed appropriate thermo-oxidative stability.The amorphous nature of polylactide was preserved after blending.The viscoelastic properties showed an increment of the mechanical blend effectiveness,which suggested the feasibility of using PLA-V/R blends under similar mechanical conditions to those of virgin PLA goods.Finally,it was shown that the energetic valorization of PLA-V/R blends would result in a more feasible process,due to the lower required activation energy,thus highlighting the advantages of the energetic demand for the process.In conclusion,PLA-V/R blends showed similar processability,service performance and valorization routes as virgin PLA and therefore could be relevant in the sustainable circular industry of bioplastics.

关键词： Polylactide (PLA) mechanical recycling reprocessing energetic valorisation thermal analysis

Future Resources for Eco-building Materials:I. Metallurgical Slag

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Journal of Wuhan University of Technology(Materials Science) 2009年第3期24卷 451-456页

作者：徐德龙 State Key Lab of Western Architecture & Technology (Cultivating Base) Xi’an University of Architecture and Technology Institute of Powder Engineering School of Materials Science and Engineering Xi’an University of Architecture and Technology

In order to make an effectivily recycle use of iron and steel slags that are main industrial wastes generated in Chinese metallurgical industry, the current technologies for reprocessing and recycling these wastes into eco-building materials were reviewed, such as preparing cement-steel slag blended cement with steel slag after metal recovery, using the fine powder of blast furnace slag （BFS） for manufacturing slag cement and high performance concrete. A further research on using these available resources more efficiently were discussed.

关键词： metallurgical slag reprocessing eco-building materials

Nontectonic Signals in Reprocessed Continuous GPS Position Time Series of CMONOC

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Geo-Spatial Information Science 2011年第3期14卷 207-215页

作者： TIAN Yunfeng Institute of Crustal Dynamics China Earthquake Administration 1 Anningzhuang Road Beijing 100085 China State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Qijiahuozi Beijing 100029 China

The nearly nine-year continuous GPS data collected since 1 March 1999 from the Crustal Motion Observation Network of China(CMONOC) were consistently analyzed.Most of the nonlinear movements in the cumulative position time series pro-duced by CMONOC data center disappeared;and more accurate vertical terms and tectonic signals were extracted.Displacements caused by atmospheric pressure loading,nontidal ocean loading,soil moisture mass loading,and snow cover mass loading using the National Centers for Environmental Prediction(NCEP) Reanalysis I/II models and Estimation of the Circulation and Climate of the Ocean(ECCO) data can explain most of the vertical annual terms at many stations,while only parts can be explained at Lhasa and southern coastal sites,indicating that there are some deformation mechanisms that are still unknown or not modeled accurately.The remarkable differences in vertical position time series for short-baseline sites reveal that GPS stations can be greatly affected by lo-cal factors;and attention should be paid when explaining observed GPS velocity vectors.

关键词： GPS 位置时间系列 CMONOC 集体装载 reprocessing

PARC Process for reprocessing Spent Fuels from Advonced Nuclear Reactors

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PARC Process for Reprocessing Spent Fuels from Advonced Nucl...