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废旧棉制备再生纤维素气凝胶实现盐晶收集及高效海水淡化

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印染 2024年第7期50卷 1-5页

作者：周兆汉冯雪凌钟毅徐红毛志平王碧佳生态纺织教育部重点实验室(东华大学) 化学与化工学院上海201620 山东中康国创先进印染技术研究院有限公司山东泰安271000 国家染整工程技术研究中心上海201620

从回收再利用废旧棉布出发,结合边缘结晶效应,制备了集太阳能蒸发与盐收集于一体的气凝胶蒸发器。以碳纳米管为光热材料,通过对气凝胶的亲疏水区域复合以及形状设计,实现了边缘结晶。研究了蒸发器的水传输行为、区域化温度差异以及不同... 详细信息

从回收再利用废旧棉布出发,结合边缘结晶效应,制备了集太阳能蒸发与盐收集于一体的气凝胶蒸发器。以碳纳米管为光热材料,通过对气凝胶的亲疏水区域复合以及形状设计,实现了边缘结晶。研究了蒸发器的水传输行为、区域化温度差异以及不同浓度的盐溶液对蒸发速率的影响,并在3.5%NaCl溶液中实现了1.93 kg/(m^(2)·h)的蒸发速率、高达91.5%的蒸发效率以及高达99.5%的离子去除率。

关键词：废旧棉再生纤维素气凝胶太阳能蒸发海水淡化集盐

Self-assembly of insulated molecular wires of a water-soluble cationic PPV and anionic dendrons

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Chinese Science Bulletin 2009年第14期54卷 2451-2456页

作者： feng xueling YAO ZhiYi LI Chun SHI Gao Quan Key Laboratory of Bio-organic Phosphorous Chemistry and Chemical Biology Department of Chemistry Tsinghua University Beijing 100084 China

Insulated molecular wires of poly(phenylenevinylene) (PPV) were prepared by wrapping the conjugated backbones with dendrons through a noncovalent approach. It was found that electrostatic interaction between the quaternary ammonium groups of PPV-1 and the carboxylate moieties in dendrons induced the packing of dendrons along PPV-1 conjugated backbones. Absorption and emission spectroscopic examinations in solution and solid film indicated that the PPV-1 backbones adopted a more planar and isolated conformation in the complexes. Furthermore, interchain interactions in the complexes could be greatly reduced, improving the quantum yield of PPV-1.

关键词：导线绝缘乙烯分子阴离子阳离子水溶性自组装静电相互作用

Polyimide Aerogel Fibers with Controllable Porous Microstructure for Super‑Thermal Insulation Under Extreme Environments

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Advanced Fiber Materials 2022年第5期4卷 1118-1128页

作者： Tiantian Xue Chenyu Zhu xueling feng Qamar Wali Wei Fan Tianxi Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai 201620People’s Republic of China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122People’s Republic of China School of Applied Sciences and Humanities National University of TechnologyIslamabad 42000Pakistan

Application of aerogel fibers in thermal insulating garments have sparked a substantial ***,achieving a high porosity and low thermal conductivity for aerogel fibers remain challenging,despite the innovative designs of porous ***,we fabricated lightweight and super-thermal insulating polyimide(PI)aerogel fibers via freeze-spinning by using polyvinyl alcohol(PVA)as a pore *** high affinity of PVA with water enables it to accelerate the ice crystal nucleation,adjust pore formation,and construct a controllable porous structure of PI aerogel *** as-fabricated PI aerogel fiber has a considerable reduced pore size,high porosity(95.6%),improved flexibility and mechanical strength,and can be woven into *** PI aerogel fabric exhibits low thermal conductivity and excellent thermal insulation in a wide range of temperature(from-196 to 300℃).Furthermore,the PI aerogel fabrics can be easily functionalized to expand their applications,such as in intelligent temperature regulation and photothermal *** results demonstrate that the aerogel fibers/fabric are promising materials for next-generation textile materials for personal thermal management.

关键词： Polyimide Aerogel fiber Pore regulation Thermal insulation Thermal management

Thermally conductive poly(lactic acid)/boron nitride composites via regenerated cellulose assisted Pickering emulsion approach

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Journal of Materials Science & Technology 2022年第6期101卷 146-154页

作者： Yating Wang Hong Jin Jiajun Shen Bijia Wang xueling feng Zhiping Mao Yumei Zhang Xiaofeng Sui Key Lab of Science and Technology of Eco-Textile Ministry of EducationCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityNo.2999North Renmin RoadSongjiang DistrictShanghai 201620China Innovation Center for Textile Science and Technology of DHU Donghua UniversityNo.2999North Renmin RoadSongjiang DistrictShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityNo.2999North Renmin RoadSongjiang DistrictShanghai 201620China

Polymer-based thermally conductive composites have attracted tremendous interest in thermal management of ***,it remains challenging to achieve high thermal conductivity partly because the difficulty to obtain favorable distribution and orientation of conductive fillers within the polymer ***,networked boron nitride(BN)conductive pathway was realized within the poly(lactic acid)(PLA)matrix,via regenerated cellulose(RC)-assisted assembly of BN on Pickering emulsion interface based on the noncovalent interaction,followed by solvent evaporation and *** strong noncovalent interactions between BN and RC were found critical to enhance the wettability and stability of BN in aqueous media with a lowest mass ratio of 1:40 of RC and *** obtained PLA/BN composites feature a thermal conductivity of 1.06 W/(m K)at 28.4 wt%BN loading,representing an enhancement of 430%comparing to neat PLA,and the crystallinity of the composites could increase significantly from11.7%(neat PLA)to 43.7%.This simple,environmentally friendly and effective strategy could be easily extended for effective construction of thermally conductive composites.

关键词： Boron nitride Regenerated cellulose Emulsion Noncovalent interaction Thermal conductivity

Polyoxometalate-loaded Nanocellulose Sponge as a Novel Catalyst for the Regioselective Hydroboration of Phenylacetylene

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Paper And Biomaterials 2019年第2期4卷 1-9页

作者： GuoQing Yang CongCong Zhang BiJia Wang ZhiPing Mao Hong Xu Yi Zhong xueling feng Xiaofeng Sui Key Lab of Science and Technology of Eco-textile Ministry of EducationCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai201620China Innovation Center for Textile Science and Technology of DHU Donghua UniversityShanghai201620China

In this work,an amino-modified cellulose nanofiber sponge was prepared and used as a support for polyoxometalate(POM)catalysts with a high loading *** transform infrared spectroscopy,thermogravimetric analysis,and energy-dispersive X-ray spectroscopy revealed that an Anderson-type POM,(NH4)4[CuMo6O18(OH)6]·5H2O was successfully immobilized on the sponge based on electrostatic *** analysis indicated that the POM-loaded sponge retained its porous structure and that the POM was homogeneously distributed on the sponge *** POM-loaded sponge exhibited excellent mechanical properties by recovering 79.9%of its original thickness following a 60%compression *** POM-loaded sponge was found to effectively catalyze the hydroboration of phenylacetylenes,yielding excellent conversion and regioselectivity of up to 96%and 99%,*** catalytic activity remained unchanged after five reuse *** findings represent a scalable strategy for immobilizing POMs on porous supports.

关键词： cellulose nanofiber polyoxometalates catalyst immobilization hydroboration heterogeneous catalyst

Rational design of robust and transparent superrepellent surfaces for long-term marine antifouling

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Science China(Technological Sciences) 2024年第7期67卷 2031-2039页

作者： CHEN Hui WANG Zhi WANG DaHeng XIAO feng FU Guang-En BU xueling ZHAO Lei ZHANG Tao WU DaHeng PU JiBin The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science&TechnologyWuhan 430081China Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

Superhydrophobic surfaces have demonstrated exceptional efficacy in combatting biofouling contaminations of optical devices and equipment in marine applications. However, the fabrication of highly transparent superhydrophobic materials remains a formidable challenge due to the inherent trade-off between surface roughness for superhydrophobicity and optical ***, we design a robust and transparent superhydrophobic coating(Si-POSS) embedded silica nanoparticles(200 nm) with fluorinated polyhedral oligomeric silsesquioxanes(F-POSS) and zinc pyrithione(ZPT). The Si-POSS coating exhibits excellent water repellence toward diverse liquids and optical transmittance exceeding 90% in the visible spectrum. Moreover, the Si-POSS coating sustains long-term anti-bacterial(> 99.11%) and anti-algal effects for over 30 days, accompanied by mechanical,chemical, and thermal stability. This research asserts that the Si-POSS coating with outstanding combined characteristics holds significant potential for marine applications, particularly in self-cleaning and antifouling endeavors.

关键词： superhydrophobic surface transparent marine antifouling nanoparticles

Stabilizing semi-transparent perovskite solar cells with a polymer composite hole transport layer

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Nano Research 2024年第3期17卷 1500-1507页

作者： Yongbin Jin Huiping feng Zheng Fang Liu Yang Kaikai Liu Bingru Deng Jingfu Chen xueling Chen Yawen Zhong Jinxin Yang Chengbo Tian Liqiang Xie Zhanhua Wei Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and EngineeringHuaqiao UniversityXiamen 361021China

Semi-transparent perovskite solar cells(ST-PSCs)have broad applications in building integrated ***,the stability of ST-PSCs needs to be improved,especially in n-i-p ST-PSCs since the doped 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenyl-amine)-9,9'-spirobifluorene(Spiro-OMeTAD)is unstable at elevated temperatures and high *** this work,aπ-conjugated polymer poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophene-2-yl)-benzo[1,2-b:4,5-b']dithiophene))-alt-(5,5-(1',3'-di-2-thienyl-5',7'-bis(2-ethylhexyl)benzo[1',2'-c:4',5'-c']dithiophene-4,8-dione)](PBDB-T)is selected to form a polymer composite hole transport layer(HTL)with *** sulfur atom of the thiophene unit and the carbonyl group of the polymer interact with the undercoordinated Pb2+at the perovskite surface,which stabilizes the perovskite/HTL interface and passivates the interfacial *** incorporation of the polymer also increases the glass transition temperature and the moisture resistance of *** a result,we obtain ST-PSCs with a champion efficiency of 13.71%and an average visible light transmittance of 36.04%.Therefore,a high light utilization efficiency of 4.94%can be ***,the encapsulated device can maintain 84%of the initial efficiency after 751 h under continuous one-sun illumination(at 30%relative humidity)at the open circuit and the unencapsulated device can maintain 80%of the initial efficiency after maximum power tracking for more than 1250 h under continuous one-sun illumination.

关键词： semi-transparent solar cells π-conjugated polymer composite hole transport layer building integrated photovoltaics

基于变换匹配层融合的双模态生物特征识别方法

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计算机工程 2023年第5期49卷 269-276页

作者：孙妍胡龙冯雪玲上海大学计算机工程与科学学院上海200444

自新冠疫情发生以来,戴口罩预防疾病可能会成为大众的常态化行为。若大部分面部特征被遮挡会影响人脸识别方法的精度,同时距离也会对面部识别造成一定影响。然而,步态作为一种可远距离并且难以伪装的生物特征,容易受身体遮挡、角度等外... 详细信息

自新冠疫情发生以来,戴口罩预防疾病可能会成为大众的常态化行为。若大部分面部特征被遮挡会影响人脸识别方法的精度,同时距离也会对面部识别造成一定影响。然而,步态作为一种可远距离并且难以伪装的生物特征,容易受身体遮挡、角度等外部条件变化的影响。提出一种基于变换匹配层的识别方法,以融合步态和面部特征。通过步态特征提取网络提取人体轮廓图中具有区分度的时空生物特征,以解决单模态人脸识别技术难以在远距离条件下对带口罩目标进行识别的问题,采用面部特征提取网络提取脸部的细粒度特征,以增强网络对于目标主体轮廓被遮挡的鲁棒性。在匹配层将面部特征与步态特征进行归一化后再将信息融合,以达到特征互补的效果。此外,构建相关联的全局-局部时空特征提取模块。通过局部特征提取模块提取细粒度的步态特征,并采用基于互补掩码的多尺度随机带状分割策略增强各个局部特征之间的关联关系。全局特征提取模块提取全局步态信息,与局部细粒度信息形成互补,从而提高步态特征提取网络对于遮挡、视角变化的鲁棒性。实验结果表明,该方法的识别准确率达到99.16%,相较于步态、面部特征提取网络分别提高6.56和0.45个百分点,并且在远距离且戴口罩的真实场景下识别准确率达到94.52%,分别提升1.92和5.98个百分点。

关键词：生物特征双模态特征融合步态识别面部识别

低分子肝素联合爱乐维治疗不明原因早期复发性自然流产的效果及对妊娠结局的影响

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药品评价 2020年第16期17卷 42-44页

作者：冯雪令濮阳市中医院妇产科河南濮阳457000

目的:探讨低分子肝素联合爱乐维治疗不明原因早期复发性自然流产的效果及对妊娠结局的影响。方法:以本院收治的76例不明原因早期复发性自然流产受孕后的孕妇为研究对象,采用随机区组法分为观察组和对照组各38例。对照组进行常规保胎,观... 详细信息

目的:探讨低分子肝素联合爱乐维治疗不明原因早期复发性自然流产的效果及对妊娠结局的影响。方法:以本院收治的76例不明原因早期复发性自然流产受孕后的孕妇为研究对象,采用随机区组法分为观察组和对照组各38例。对照组进行常规保胎,观察组联合低分子肝素和爱乐维进行保胎,比较两组治疗成功率、维持妊娠率,以及治疗前后甲状腺激素、人绒毛膜促性腺激素(HCG)水平和不良反应。结果:观察组治疗成功率(89.47%)与对照组(92.11%)比较,差异无统计学意义(P>0.05)。观察组维持妊娠率(85.29%)高于对照组(62.86%),差异具有统计学意义(P0.05)。结论:低分子肝素联合爱乐维可提高不明原因早期复发性自然流产孕妇的保胎效果,改善其妊娠结局。

关键词：复发性自然流产低分子肝素爱乐维保胎妊娠结局