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防护用PVA复合材料的制备及性能研究

化工新型材料 2024年第1期52卷 189-193页

作者：宋静雯程慧鹏朱亚楠周惠敏徐阳新疆大学纺织与服装学院乌鲁木齐830017 江南大学纺织科学与工程学院无锡214122

为实现核电控制区一次性防护服溶解减容处理的目的,利用热水可溶的聚乙烯醇(PVA)为基材制备防护用PVA复合材料。通过溶液流延涂布法制备PVA膜,再利用超声波焊接将PVA膜与PVA水刺非织造布结合制备不同克重的PVA复合材料并对其性能进行研... 详细信息

为实现核电控制区一次性防护服溶解减容处理的目的,利用热水可溶的聚乙烯醇(PVA)为基材制备防护用PVA复合材料。通过溶液流延涂布法制备PVA膜,再利用超声波焊接将PVA膜与PVA水刺非织造布结合制备不同克重的PVA复合材料并对其性能进行研究。借助扫描电镜、红外光谱对PVA膜、PVA非织造布、PVA膜/PVA非织造布结合点的表面形貌及分子结构进行表征,同时通过水溶测试、力学性能测试、吸水性及透湿性测试研究PVA复合材料的热水溶解情况、力学性能及吸湿透湿能力。结果表明:PVA膜表面光洁,致密性好;PVA膜与PVA非织造布结合良好。所制备的6种不同克重的PVA复合材料,在70℃热水中开始溶解,随着温度的升高,复合材料溶解速度逐渐变快,模拟热水淋洒布样表面,布面变化不大。PVA非织造布克重影响其内部结构和纤维排列状态,从而对力学性能产生一定的影响,拉伸强度随着试样克重的增大呈现先增大后减小的趋势。几种不同克重材料吸湿性能差异较小。综合比较发现当复合材料克重为85g/m^(2)时材料性能较优。

关键词：聚乙烯醇膜基复合材料水溶性力学性能吸湿性

Preparation and Properties of Light-colored Antistatic ATZO@TiO_(2)/PAN Fiber

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Journal of Wuhan University of Technology(Materials Science) 2023年第4期38卷 766-770页

作者：许子傲 WANG Jinkang zhu yanan PANG Zengyuan 葛明桥 School of Textile Science and Engineering Jiangnan UniversityWuxi214122China Key Laboratory of Eco-Textiles Ministry of EducationJiangnan UniversityWuxi214122China

Light-colored antistatic polyacrylonitrile(PAN)composite fiber was successfully prepared via a facile wet-spinning process using ATZO@TiO_(2)whiskers as conductive *** kind of low-cost fiber meets the requirements of light-colored and antistatic ability,which is quite suitable for mass production of dust-proof and safety *** conductive whiskers are well dispersed in the fiber and form a continuous conductive pathway,which makes the fiber to possess a long conductive *** lowest resistance of antistatic ATZO@TiO_(2)/PAN fiber was 2.1×10^(7)Ω·cm.

关键词： titanium dioxide conductive whisker antistatic fiber

Mercury isotope constraints on the genesis of late Mesozoic Sb deposits in South China

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Science China Earth Sciences 2022年第2期65卷 269-281页

作者： Changzhou DENG Jiawei ZHANG Ruizhong HU Kai LUO yanan zhu Runsheng YIN State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Guizhou Geological Survey Bureau of Geology and Mineral Exploration and Development of Guizhou ProvinceGuiyang 550081China Technology Innovation Center of Mineral Resources Exploration Engineering in Bedrock Zone Ministry of Natural ResourcesGuiyang 550081China College of Resources and Environmental Engineering Guizhou UniversityGuiyang 550025China School of Earth Sciences Yunnan UniversityKunming 650500China

The late Mesozoic antimony(Sb)mineralization belt in South China hosts a large portion of the world’s Sb ***,the source and mineralization processes of these Sb deposits remain ***,we measured mercury(Hg)concentrations and isotopic compositions of stibnite in the Banpo Sb-only and Woxi Sbpolymetallic ore deposits,as well as associated rocks in the Yangtze Block in order to constrain the metal sources and ore formation processes in the South China Sb mineralization *** samples from both deposits exhibit significant enrichment in Hg(4.23–50.6 ppm)and have higher δ^(202)Hg values(−0.47‰to 2.03‰)than the studied Precambrian basement rocks(−1.42‰to 0.59‰),Paleozoic sedimentary rocks(−2.40‰to−0.32‰),and other natural Hg reserves(e.g.,marine and continental systems).This indicates that significant mass-dependent fractionation of Hg isotopes occurred during hydrothermal *** to slightly positive Δ^(199)Hg values of−0.17‰to 0.02‰were obtained for stibnite from the studied deposits,similar to values for the Precambrian basement rocks,but different from those of the Paleozoic sedimentary rocks and data previously reported for mantle *** suggests that Precambrian basement rocks were the source of Hg and associated *** data and the tectonic evolution of South China indicate that late Mesozoic asthenospheric upwelling,in response to the Paleo-Pacific oceanic slab foundering,generated heat that drove the circulation of fluids in the basement and crustal basinal *** fluids leached Sb,Hg,and other metals from the Precambrian basement rocks and formed the world-class Sb mineralization belt in South China.

关键词： Hg isotopes Mass-independent fractionation Sb deposits Metamorphic basement South China

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变压精馏分离乙腈-乙醇共沸物的模拟与优化

山东化工 2024年第11期53卷 202-206页

作者：仲超李春梅朱雅楠南京长江江宇环保科技股份有限公司江苏南京210047

以Wilson活度系数模型为物性计算方法,使用Aspen Plus软件对变压精馏分离乙腈-乙醇常压共沸物的工艺进行模拟与优化。选择250和101.325 kPa作为加压塔和常压塔的操作压力,并在乙腈及乙醇产品纯度均为99.9%(质量分数)的约束条件下,重点... 详细信息

以Wilson活度系数模型为物性计算方法,使用Aspen Plus软件对变压精馏分离乙腈-乙醇常压共沸物的工艺进行模拟与优化。选择250和101.325 kPa作为加压塔和常压塔的操作压力,并在乙腈及乙醇产品纯度均为99.9%(质量分数)的约束条件下,重点考察了两塔理论板数对塔板温度分布以及进料板位置、回流比对两塔再沸器总热负荷的影响,得到了优化的工艺参数。优化后的工艺参数为:加压塔理论塔板数15、进料板位置5、回流比1.4;常压塔理论塔板数14、进料板位置5、回流比1.2。以此为基础,分析了常规变压精馏和热集成变压精馏的工艺能耗。结果表明:与常规变压精馏工艺相比,热集成变压精馏工艺可节能41.69%。

关键词：变压精馏乙腈乙醇分离模拟

放射性核素治疗病房护理质量评价指标体系的构建

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辐射防护 2024年第5期44卷 554-561页

作者：刘柳侯备朱亚男高燕梁应凤郭姗姗火箭军特色医学中心涉核人员治疗科北京100088 火箭军特色医学中心泌尿外科北京100088

通过构建放射性核素治疗病房护理质量评价指标,科学评估放射性核素治疗病房患者护理质量。本文以Donabedian的“结构-过程-结果”三维质量评价模型为理论基础,通过文献检索、半结构式访谈、德尔菲法、层次分析法确立放射性核素治疗病房... 详细信息

通过构建放射性核素治疗病房护理质量评价指标,科学评估放射性核素治疗病房患者护理质量。本文以Donabedian的“结构-过程-结果”三维质量评价模型为理论基础,通过文献检索、半结构式访谈、德尔菲法、层次分析法确立放射性核素治疗病房护理质量评价指标体系。在循证护理实践方法的指导下,整合文献检索和半结构式访谈结果构建放射性核素治疗病房护理质量评价指标池,经过两轮专家函询确定指标内容。本研究纳入20名函询专家,两轮专家函询的问卷有效回收率为90%、100%;专家权威系数分别为0.945和0.950;肯德尔和谐系数分别为0.128和0.550(P4.00分,变异系数均<0.33,各项指标具有较高的可靠性。本研究构建的放射性核素治疗病房护理质量评价指标体系对核素治疗病人的护理工作具有指导意义,为放射性核素治疗病房护理工作的质量评价提供了参考。

关键词：放射性核素核素治疗病房护理质量三维质量模型

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The effects of premium intraocular lenses on presbyopia treatments

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Advances in Ophthalmology Practice and Research 2022年第1期2卷 18-27页

作者： yanan zhu Yueyang Zhong Yanyan Fu Eye Center of the Second Affiliated Hospital School of MedicineZhejiang UniversityHangzhou310009Zhejiang ProvinceChina

Background:Presbyopia has become a global disease affecting the world's aging *** various treatments,cataract extraction and intraocular lens(IOL)implantation have become the most popular and common methods of presbyopia *** the twentieth century,IOLs have underwent significant innovation and advancements to meet the patients'high demands for functional vision at all *** Text:To meet the increasing needs for excellent near and intermediate vision for daily activities,some premium IOLs with more than one focus have been developed,for example,the refractive MfIOLs,diffractive MfIOLs,extended depth of field(EDOF)IOLs,and accommodating IOLs(AIOLs)were introduced to meet this *** addition,the add-on MfIOLs have been explored as promising supplementary IOLs for pseudophakic *** selecting the MfIOLs,the IOLs'features,patients’characteristics,preoperative eye conditions,and treatment expectations should be ***:In this review,we focus on the multifocal IOLs(MfIOLs)commonly used for presbyopia correction and systematically summarized their optical designs and clinical *** evidence-based studies are required to provide guidelines for MfIOL selection,provide maximum visual benefits,and develop personalized visual solutions in the future.

关键词： Presbyopia Intraocular lens Monofocal intraocular lens Multifocal intraocular lens Extended depth of field intraocular lens Accommodating intraocular lens Clinical outcomes

Effect of Pre-Anthesis Drought Hardening on Post-Anthesis Physiological Characteristics,Yield and WUE in Winter Wheat

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Phyton-International Journal of Experimental Botany 2021年第1期90卷 245-257页

作者： Ruitao Lou Daoxi Li Yanbin Li Zepeng Bian yanan zhu School of Water Conservancy North China University of Water Resources and Electric PowerZhengzhou450000China Changshu River Management Office Changshu215500China

A drought event can cause yield loss or entire crops to *** order to study the effects of continuous drought on physiological characteristics,yield,and water use efficiency(WUE)of winter wheat(Triticum aestivum L.),the variety“Zhoumai 22”was grown in controlled water conditions of the pot-planted winter wheat under a mobile rainout *** planting and safe wintering were used to evaluate,winter wheat under different drought conditions,including light,moderate and severe drought at the jointing,heading,and filling *** soil water content was controlled at 60–70%,50–60%,or 40–50%of field *** trials included 3 pre-anthesis drought hardening,3 three-stage continuous drought,and 1 test control *** drought stress conditions,winter wheat leaf water potential,soil plant analysis development(SPAD),photosynthesis parameters,and yield declined due to pre-anthesis drought *** the degree of decline:continuous drought>pre-anthesis drought *** in the post-anthesis photosynthetic capacity of winter wheat were mainly related to the pre-anthesis drought level,rather than post-anthesis *** threshold of non-stomata limiting factors caused by photosynthesis at the filling stage is 40–50%FC,while comprehensive yield and WUE affected,the yield in severe drought treatments was the most significant,B3C3 and B3C3G3 decreased by 55.68%and 55.88%,***-anthesis drought was the main reason for the decreased crop ***,severe drought should be avoided during planting,while pre-anthesis light drought is a suitable choice for watersaving and crop production,as proper pre-anthesis drought hardening(60–70%FC)is feasible and effective.

关键词： :Triticum aestivum L pre-anthesis drought hardening leaf water potential SPAD yield WUE

Preparation and luminescence properties of rare-earth doped fiber with spectral blue-shift： SrAl2O4：Eu^(2＋),Dy^(3＋) phosphors/triarylsulfonium hexafluoroantimonate based on polypropylene substrate

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Journal of Rare Earths 2017年第6期35卷 530-535页

作者： LI Jing WANG Jian YU Yuan zhu yanan GE Mingqiao Key Laboratory of Eeo-Textile of Ministry of Education College of Textiles and Clothing Jiangnan University Wuxi 214122 China

The rare-earth doped fiber with spectral blue-shift based on long afterglow luminescent materials SrAl2O4：Eu^2＋,Dy^3＋ phosphors and an organic cationic photoinitiators-triarylsulfonium hexafluoroantimonate（TSHF） in the presence of polypropylene substrate（PP） was prepared by melt-spinning process. Scanning electron microscopy（SEM）, infrared spectroscopy（IR）, afterglow properties and luminescence properties were tested. The results of SEM and FTIR spectra showed that the fiber consisted of irregular particles and had independent structural constitution of SrAl2O4：Eu-（2＋）,Dy-（3＋） phosphors, TSHF and polypropylene. Furthermore, it was observed that there existed the highest afterglow initial intensity for the fiber with the TSHF concentration of 5 wt.%. More interestingly, the emission peak shifted to blue area gradually as the TSHF doping increased. The rare-earth doped fiber was distributed on blue light area in the CIE 1931 chromaticity diagram, which showed more obvious blue-shift phenomenon than the yellow-green light of SrAl2O4：Eu^2＋,Dy^3＋ phosphors.

关键词： polypropylene luminescence luminescent constitution cationic irregular conjugate coordinates luminous ultraviolet

胃癌根治术患者术后肠内营养耐受状况及影响因素研究

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华南预防医学 2024年第7期50卷 613-617页

作者：朱亚楠马丽陈锦凤薛丽南通市肿瘤医院江苏南通226361

目的探讨胃癌根治术患者术后肠内营养(EN)耐受状况及其影响因素。方法 2021年1月至2023年12月选取南通市肿瘤医院1 347例实施胃癌根治术后EN喂养的住院患者作为研究对象,依据EN过程中是否发生胃肠道不适分为EN耐受组(499例)、EN不耐受... 详细信息

目的探讨胃癌根治术患者术后肠内营养(EN)耐受状况及其影响因素。方法 2021年1月至2023年12月选取南通市肿瘤医院1 347例实施胃癌根治术后EN喂养的住院患者作为研究对象,依据EN过程中是否发生胃肠道不适分为EN耐受组(499例)、EN不耐受组(848例)。调查胃癌根治术患者术后EN耐受现状,收集患者相关资料,分析影响其EN耐受的主要因素。结果胃癌根治术患者EN不耐受发生率为62.95%(848/1 347);EN耐受率为37.05%(499/1 347),EN不耐受患者中发生腹泻41.98%(356/848)、腹胀36.79%(312/848)、胃潴留18.04%(153/848)、呕吐/反流3.18%(27/848)。多因素logistic回归分析显示,年龄(OR=2.519)、EN置管方式(鼻空肠管OR=0.643,造瘘OR=2.996)、术后首次下床活动时间(>4 h OR=0.567)、营养制剂种类(OR=3.705)、应用镇静/镇痛药物(OR=2.474)、初始EN输注方式(OR=3.434)是胃癌根治术患者术后EN耐受情况的独立影响因素。结论胃癌根治术患者术后EN不耐受发生率较高,影响因素包括年龄、EN置管方式、术后首次下床活动时间等,临床应针对患者实际情况采取合适的EN喂养策略,最大程度减少喂养不耐受发生。

关键词：胃癌根治术肠内营养影响因素喂养不耐受