检索结果-南通市图书馆

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

引用

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 electronics.However,it remains challenging to achieve high thermal conductivity partly because the difficulty to obtain favorable distribution and orientation of conductive fillers within the polymer matrix.Herein,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 hot-compressing.The 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 BN.The 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 efficiency.Fourier 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 interactions.Morphological analysis indicated that the POM-loaded sponge retained its porous structure and that the POM was homogeneously distributed on the sponge walls.The POM-loaded sponge exhibited excellent mechanical properties by recovering 79.9%of its original thickness following a 60%compression strain.The POM-loaded sponge was found to effectively catalyze the hydroboration of phenylacetylenes,yielding excellent conversion and regioselectivity of up to 96%and 99%,respectively.Its catalytic activity remained unchanged after five reuse cycles.These findings represent a scalable strategy for immobilizing POMs on porous supports.

关键词： cellulose nanofiber polyoxometalates catalyst immobilization hydroboration heterogeneous catalyst

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

纺织染整领域支撑低碳排放的关键技术

引用

纺织学报 2022年第1期43卷 113-121页

作者：纪柏林王碧佳毛志平东华大学化学化工与生物工程学院上海201620 东华大学国家染整工程技术研究中心上海201620 东华大学生态纺织教育部重点实验室上海201620 国家先进印染技术创新中心山东泰安271000

为深入了解染整行业近年来在低碳排放领域取得的技术突破和现状,掌握行业技术前沿和发展趋势,对国内外相关技术和研究进展进行了综述。主要从节能减排技术、功能纺织品技术、先进绿色染整加工设备及系统、废水深度处理及化学品循环回用... 详细信息

为深入了解染整行业近年来在低碳排放领域取得的技术突破和现状,掌握行业技术前沿和发展趋势,对国内外相关技术和研究进展进行了综述。主要从节能减排技术、功能纺织品技术、先进绿色染整加工设备及系统、废水深度处理及化学品循环回用几个方面,对技术性能及其对低碳排放的作用进行了介绍。研究指出:染整领域不仅传统加工手段取得技术突破,还在智能调温纺织品等前沿领域保持与时俱进;通过多维度努力,有助于推动染整行业不断的技术创新,提升产业价值,减少环境影响,实现绿色低碳循环发展,并为实现碳达峰、碳中和的国家目标贡献行业力量。

关键词：低碳排放染整节能减排功能性纺织品智能制造

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

纳米甲壳素稳定蜂蜡油凝胶Pickering乳液的性能研究

引用

日用化学工业 2022年第8期52卷 844-850页

作者：沈嘉骏宦静静王碧佳隋晓锋东华大学化学化工与生物工程学院生态纺织教育部重点实验室上海201620 芬美意香料(中国)有限公司上海201108

用盐酸蒸汽处理甲壳素原料来制备纳米甲壳素,其形貌为棒状结构且平均直径约为50~60 nm、具有较高的长径比。以蜂蜡和玉米油制成的油凝胶作为油相,用纳米甲壳素作为Pickering乳液稳定剂,制得O/W型油凝胶Pickering乳液。用光学显微镜、荧... 详细信息

用盐酸蒸汽处理甲壳素原料来制备纳米甲壳素,其形貌为棒状结构且平均直径约为50~60 nm、具有较高的长径比。以蜂蜡和玉米油制成的油凝胶作为油相,用纳米甲壳素作为Pickering乳液稳定剂,制得O/W型油凝胶Pickering乳液。用光学显微镜、荧光显微镜、动态光散射粒度仪、流变仪对乳液进行表征。偏振光显微镜图片中的双折射现象表明蜂蜡油凝胶被包裹在油滴中。荧光显微镜的结果显示纳米甲壳素在油/水界面的吸附能力很强,在纳米甲壳素质量分数仅为0.2%时,即可乳化含有10%(质量分数)蜂蜡的油相得到稳定的油凝胶Pickering乳液(油/水质量比为1∶9),且干燥除水后能够维持原貌。油凝胶以及其乳液的流变行为表明纳米甲壳素在油/水界面具有较好的机械阻隔作用,且油凝胶可以在剪切作用下被释放。

关键词： Pickering乳液纳米甲壳素盐酸蒸汽蜂蜡油凝胶

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

纳米甲壳素的快速制备及其乳化性能研究

引用

日用化学工业（中英文） 2022年第10期52卷 1081-1087页

作者：宦静静王碧佳毛志平隋晓锋东华大学化学化工与生物工程学院生态纺织教育部重点实验室上海201620

简化磷酸溶解再生制备纳米甲壳素的工艺,避免大量溶剂的使用、缩短制备时间以及提高产率。采用X射线衍射、透射电镜和电感耦合等离子体发射光谱仪对甲壳素及再生纳米甲壳素进行了表征。以辛酸/癸酸甘油三酯(GTCC)作为油相,用纳米甲壳素... 详细信息

简化磷酸溶解再生制备纳米甲壳素的工艺,避免大量溶剂的使用、缩短制备时间以及提高产率。采用X射线衍射、透射电镜和电感耦合等离子体发射光谱仪对甲壳素及再生纳米甲壳素进行了表征。以辛酸/癸酸甘油三酯(GTCC)作为油相,用纳米甲壳素作为Pickering乳液稳定剂,制得水包油(O/W)型Pickering乳液。通过各类表征证明该方法制备的所有纳米甲壳素均可以乳化GTCC得到稳定的Pickering乳液(纳米甲壳素含量为0.2%)。随后其乳液的流变行为表明纳米甲壳素能很好地吸附在油水界面上,并且稳定Pickering乳液。

关键词：纳米甲壳素磷酸高效制备 Pickering乳液

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of tree-ring mercury radial translocation and age effect in Masson pine:Implications for historical atmospheric mercury reconstruction

引用

Journal of Environmental Sciences 2024年第4期138卷 266-276页

作者： Xu Liu Xun wang Dingyong wang College of Resources and Environment Southwest UniversityChongqing 400715China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

The tree ring has been regarded as an emerging archive to reconstruct historical atmospheric mercury(Hg)trends,but with the large knowledge gaps in the reliability.In this study,we comprehensively evaluated the Hg source,radial translocation and age effect of Masson pine(Pinus massoniana)tree ring at Mt.Jinyun in Chongqing,to assess the suitability of such tree ring as the archive of atmospheric Hg.Results showed that distinct variabilities among Masson pine tree-ring Hg concentration profiles.The Hg concentration significantly increased along with stem height(P<0.05),indicating the Hg in tree rings mainly derived from foliage uptake atmospheric Hg.We found a distinct age effect that the tree ring of young trees had the higher Hg concentration.Besides,we used the advection-diffusion model to demonstrate how Hg concentration shifted by the advection or/and diffusion in tree rings.The modeling results showed that the advection induced radial translocation during the young growth period of tree was a plausible mechanism to result in the tree-ring Hg record largely different from the trend of anthropogenic Hg emissions in Chongqing.We finally suggest that in further Hg dendrochemistry,better discarding the tree-ring Hg profile of the young growth period to reduce impacts of the radial translocation and age effect.

关键词： Masson pine Tree-ring mercury Radial translocation Tree age effect

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pushing the boundaries: an interview with Dae-Hyun Kim on terahertz devices

引用

National Science Review 2024年第3期11卷 42-45页

作者： Defu wang the Center for Carbon-based Electronics School of Electronics Peking University

Ⅲ–Ⅴ compound semiconductors, such as InGaAs/InAlAs, exhibit exceptional carrier transport properties, establishing them as fundamental elements in terahertz(THz) applications crucial for the development of 6G netwo...

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Enrichment of anammox biomass during mainstream wastewater treatment driven by achievement of partial denitrification through the addition of bio-carriers

引用

Journal of Environmental Sciences 2024年第3期137卷 181-194页

作者： Yuqing Ma Bo wang Xiaodi Li Shuo wang Wen wang Yongzhen Peng National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Engineering Research Center of BeijingBeijing University of TechnologyBeijing 100124China

Anammox is widely considered as the most cost-effective and sustainable process for nitrogen removal.However,how to achieve the enrichment of anammox biomass remains a challenge for its large-scale application,especially in mainstream wastewater treatment.In this study,the feasibility of enrichment of anammox biomass was explored through the realization of partial denitrification and the addition of bio-carriers.By using ordinary activated sludge,a sequencing batch reactor(SBR)followed by an up-fow anaerobic sludge bed(UASB)was operated at 25±2℃ for 214 days.The long-term operation was divided into five phases,in which SBR and UASB were started-up in Phases I and II,respectively.By eliminating oxygen and adjusting the infow ratios in Phases III-V,advanced nitrogen removal was achieved with the effuent total nitrogen being 4.7 mg/L and the nitrogen removal efficiency being 90.5%in Phase V.Both in-situ and ex-situ activity tests demonstrated the occurrence of partial denitrification and anammox.Moreover,16S rRNA high-throughput sequencing analysis revealed that Candidatus Brocadia was enriched from below the detection limit to in biofilms(0.4%in SBR,2.2%in UASB)and the foc sludge(0.2%in SBR,1.3%in UASB),while Thauera was mainly detected in the foc sludge(8.1%in SBR,8.8%in UASB),which might play a key role in partial denitrification.Overall,this study provides a novel strategy to enrich anammox biomass driven by rapid achievement of partial denitrification through the addition of bio-carriers,which will improve large-scale application of anammox processes in mainstream wastewater treatment.

关键词： Enrichment Anammox biomass Bio-carriers Partial denitrification Mainstream wastewater

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Performance and mechanism of La-Fe metal-organic framework as a highly efficient adsorbent for fluoride removal from mine water

引用

Journal of Environmental Sciences 2024年第5期139卷 245-257页

作者： Chaomin Jia Jianbing wang Huijiao wang Sichao Zhu Xiaohui Zhang Yuxiang wang School of Chemical&Environmental Engineering China University of Mining&Technology-BeijingBeijing 100083China Beijing Polytechnic Beijing 100176China Chinese Society for Urban Studies Beijing 100835China

Water fluoride pollution has caused non-negligible harm to the environment and humans,and thus it is crucial to find a suitable treatment technology.In this study,La-Fe@PTA adsorbent was synthesized for the defluoridation of mine water.The results showed that the optimum conditions for defluoridation by La-Fe@PTA were p H close to 7.0,the initial F-concentration of 10 mg/L,the dosage of 0.5 g/L and the adsorption time of 240 min.Compared with SO_4^(2-),Cl^(-),NO_(3)^(-),Ca^(2+)and Mg^(2+),CO_(3)^(2-)and HCO_(3)^(-)presented severer inhibition on fluoride uptake by La-Fe@PTA.The adsorption process fits well with the pseudo-second-order kinetic model and Freundlich model,and the maximum adsorption capacity of Langmuir model was 95 mg/g.Fixed-bed adsorption results indicated that fluoride in practical fluorinated mine water could be effectively removed from 3.6 mg/L to less than 1.5 mg/L within130 bed volume(BV)by using 1.5 g La-Fe@PTA.Furthermore,the adsorbent still had good adsorption capacity after regeneration,which confirms the great application potential of La-Fe@PTA as a fluoride ion adsorbent.The mechanism analysis showed that La-Fe@PTA adsorption of fluorine ions is a physicochemical reaction driven by electrostatic attraction and ion exchange.

关键词： Adsorption La-Fe@PTA Fluoride ion Mine water Mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：