检索结果-内蒙古大学图书馆

Microstructure Evolution and Strain Softening of Carbon Black Filled Natural Rubber Vulcanizates

Chinese Journal of Polymer Science 2023年第12期41卷 1947-1957,I0010页

作者： Xuan-Yu Shi Shi-Hao Sun Li Yang Jun Zhong Xiao-Feng Yu Zheng Xu Min Zuo Yi-Hu Song Qiang Zheng Ministry of Education Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030001China

Incorporation of carbon black(CB)in natural rubber(NR)enhances the Mullins effect and Payne effect of their vulcanizates,but the strain softening mechanisms and the microstructure evolution in the vulcanizates have not been clearly concluded so *** investigate the Mullins effect and Payne effect of CB filled NR vulcanizates by using cyclic tensile tests at different temperatures and dynamic rheological measurements combined with simultaneous electric *** cyclic stretching,the normalized recovery hysteresis energy and accumulative softening energy for NR/CB vulcanizates with different loadings can be both superimposed on a master curve,indicating that the Mullins effect is mainly dominated by the rubber *** irreversible simultaneous resistance evolution also reveals that the structural evolution of nanoparticles(NPs)network is not directly related to the Mullins ***,the extension of linear viscoelastic region and the hysteresis of Payne effect for filled vulcanizates subjected to cyclic stretching indicate the destruction of CB aggregated structure and the interfacial layers between CB and rubber chains during cyclic *** investigation would be illuminating for the microstructure evolution and strain softening of rubber nanocomposites under harsh service conditions.

关键词： Mullins effect Payne effect Conductive connected network Nanocomposites

来源：评论

学校读者我要写书评

暂无评论

Polyamide Composite Membranes on Electrospun Nanofibers for Osmotic Enrichment of Ionic Liquids from Aqueous Solutions

引用

Chinese Journal of Polymer Science 2025年第5期43卷 819-827页

作者： Yu-Jie Shang Bian-Bian Guo Hao-Nan Li Yong-Jin Li Jing Yang Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education and Key Laboratory of Organosilicon Material Technology of Zhejiang ProvinceCollege of MaterialChemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou311121China MOE Key Laboratory of Macromolecular Synthesis and Functionalization and Key Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang ProvinceDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China

The recovery of ionic liquids(ILs)has attracted growing attention as an indispensable process in“green”industrial *** osmosis(FO)has proven to be a sustainable method for concentrating the very dilute aqueous solutions of ILs at ambient temperature,in which semi-permeable membranes play a vital role in determining the recovery ***,we use interfacial polymerization method to prepare thin-film composite membranes consisting of polyamide skin layer and electrospun nanofibrous substrate with tunable water permeability and IL selectivity for osmotic enrichment of imidazolium ILs from their dilute aqueous solutions through FO *** resulting FO membrane shows a compact polyamide layer with a thickness of 30-200 nm,guranteeing a high selectivity to ILs and ***,the nanofibrous substrate with large and interconnect pores as well as low tortuosity,providing mechanical and permeable support for the composite *** structure influences the osmotic pressure difference as well as the interactions with polyamide layer of the membrane and thus determines the whole concentration ***,the alkyl chain growth augments the osmosis pressure difference between the ILs solution and draw solution,resulting in an enhancement in driving force of water osmosis and IL ***,alkyl length aggravates external concentration polarization caused by the enhanced adsorption of ILs onto the skin layer via electrostatic and alkyl-π***,such adsorbed ILs further enhance the IL retention but decrease the reverse salt ***,imidazolium ILs with varied alkyl lengths are ultimately enriched with a 100-fold increase in concentration from their dilute aqueous solutions with high IL/NaCl rejection and low IL ***,the final concentration of IL with longest alkyl length reaches the highest(6.4 mol·L^(-1)).This work provides the insights in respect to material preparation and process amelioratio

关键词： Thin-film composite membrane Forward osmosis Ionic liquids Interfacial polymerization Electrospun nanofiber

来源：评论

学校读者我要写书评

暂无评论

Surface and Interface Engineering for Advanced Nanofiltration Membranes

引用

Chinese Journal of Polymer Science 2022年第2期40卷 124-137页

作者： Bian-Bian Guo Cheng-Ye Zhu Zhi-Kang Xu Ministry of Education Key Laboratory of Macromolecular Synthesis and FunctionalizationKey Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang ProvinceDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Nanofiltration has been attracting great attention in alleviating the global water crisis because of its high efficiency,mild operation,and strong *** decades,it remains a challenge to break the upper limit of performance and establish the formation-structureproperty relationship for nanofiltration *** feature article summarizes our recent progress in the preparation of high-performance thin-film composite(TFC)nanofiltration membranes,focusing on the mussel-inspired deposition method and the optimized interfacial polymerization(IP).By accelerating the oxidation of polydopamine and equilibrating the rate of aggregation and deposition processes,the mussel-inspired deposition method realizes the rapid and uniform formation of selective coatings or *** deposition systems endow the selective layer with rich chemical structures and easy post-functionalization,highlighting its potential in water *** for optimizing the conventional IP,the rapid polycondensation of amine and acid chloride groups is slowed down to enable the controllability of IP at the water-organic *** homogeneity and integrity of the TFC membranes are improved by constructing a uniform reaction platform and introducing a viscous medium to control the amine diffusion,which facilitates the water permeability and promotes the separation *** have proposed a series of practical strategies for improving TFC membranes and might provide more inspiration for other nanofiltration techniques.

关键词： Nanofiltration Thin-film composite membranes Mussel-inspired deposition Interfacial polymerization

来源：评论

学校读者我要写书评

暂无评论

A polymyxin B loaded hypoxia-responsive liposome with improved biosafety for efficient eradication of bacterial biofilms

引用

Nano Research 2024年第9期17卷 8325-8336页

作者： Fang Liu Lingyun Zou Yongcheng Chen Zuolong Liu Yue Huang Qiao Jin Jian Ji MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Transvascular Implantation Devices The Second Affiliated Hospital Zhejiang University School of MedicineHangzhou 310009China

Biofilm-associated bacterial infection brings serious threats to global public health owing to serious antibiotic *** is urgently needed to develop innovative strategies to combat biofilm-associated bacterial *** stand out as the last line of defense against Gram-negative ***,serious nephrotoxicity of polymyxins severely limits their clinical ***,a hypoxia-responsive liposome is designed as the nanocarrier of polymyxin B(PMB)to combat biofilms developed by Gram-negative bacteria.A metronidazole modified lipid(hypoxia-responsive lipid(HRLipid))is synthesized to fabricate hypoxia-responsive liposomes(HRLip).PMB loaded hypoxia-responsive liposomes(HRL-PMB)is then prepared to mitigate the nephrotoxicity of PMB while preserving its excellent bactericidal ***-PMB shows very low hemolysis and cytotoxicity due to liposomal encapsulation of *** can be readily released from HRL-PMB in response to hypoxic biofilm microenvironment,exerting its bactericidal activity to realize biofilm *** excellent in vivo antibiofilm ability of HRL-PMB is confirmed by a Pseudomonas aeruginosa infected zebrafish model and a *** pneumonia infection ***,HRL-PMB can greatly reduce the nephrotoxicity of PMB after intravenous *** hypoxia-sensitive liposomes held great promise to improve the biosafety of highly toxic antibiotics while preserving their intrinsic bactericidal ability,which may provide an innovative strategy for combating biofilm-associated infections.

关键词： bacterial biofilm hypoxia liposome polymyxin B nephrotoxicity

来源：评论

学校读者我要写书评

暂无评论

Recent Advances of Covalent Organic Frameworks in Chemical Sensing

引用

Chemical Research in Chinese Universities 2022年第2期38卷 339-349页

作者： XU Kai HUANG Ning Key Laboratory of Macromolecular Synthesis and Functionalization Ministry of EducationState Key Laboratory of Silicon MaterialsDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027P.R.China

With the rapid development of reticular chemistry,an increasing number of covalent organic frameworks(COFs)have been designed and synthesized over the past *** to the large surface areas,numerous active sites,and high chemical stability,recent effects gradually were made to investigate the interaction with various small *** the reported application areas,sensorics is an attractive field,where COFs have exhibited tremendous potential and acquired high-performance sensitivity and selectivity due to their structural *** this review,we highlighted the recent progress of COFs as sensors for the detection of various analytes,mainly depending on the analysis of change of fluorescence *** basic principles of physics for fluorescence-based sensors were briefly discussed for better understanding of the relationship between structures and functions of ***,we reviewed various classes of small molecule analytes that have been successfully detected by COFs,including explosives,gases,humidity,metal ions,pH,and biological *** this work,we detailedly discussed the components of COFs,functional sites,and sensing performance in each sensing application,aiming to disclose their intrinsic *** review also concluded with several issues to be solved and provided the outlook for the future development direction for practical applications.

关键词： Covalent organic framework(COF) Sensing Fluorescence Porous polymer

来源：评论

学校读者我要写书评

暂无评论

The relief of hypoxic microenvironment using an O_(2) self-sufficient fluorinated nanoplatform for enhanced photodynamic eradication of bacterial biofilms

引用

Nano Research 2022年第2期15卷 1636-1644页

作者： Lingyun Zou Dengfeng Hu Fanjin Wang Qiao Jin Jian Ji MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Hypoxia,an important characteristic of bacterial biofilms,can hinder the generation of reactive oxygen species(ROS)in photodynamic therapy(PDT),leading to reduced therapeutic efficacy of *** order to address this issue,fluorinated liposome was fabricated as an oxygen-sufficient nanoplatform for enhanced photodynamic eradication of bacterial *** liposomes(denoted as Lip-Ce6-PFH@O_(2))were prepared by co-encapsulation of O_(2) carrier perfluorohexane(PFH)and photosensitizer chlorin e6(Ce_(6)).Lip-Ce6-PFH@O_(2) could achieve efficient biofilm penetration due to the positively charged *** hypoxic microenvironment of biofilms would then be relieved,leading to the generation of more ROS under laser ***,the bactericidal capability of PDT could be significantly improved because of the co-delivered O_(2) carrier ***-Ce6-PFH@O_(2) exhibited much better antibiofilm ability than that of Lip-Ce6 both in vitro and in ***,Lip-Ce6-PFH@O_(2) also effectively alleviated inflammation symptoms and accelerated wound healing in the mice *** general,this study provides a new paradigm to enhance the therapeutic efficacy of PDT for efficient biofilm eradication.

关键词： biofilm hypoxia perfluorohexane liposome photodynamic therapy

来源：评论

学校读者我要写书评

暂无评论

A Review on Graphene Oxide Two-dimensional Macromolecules: from Single Molecules to Macro-assembly

引用

Chinese Journal of Polymer Science 2021年第3期39卷 267-308,I0004页

作者： Wen-Zhang Fang Li Peng Ying-Jun Liu Fang Wang Zhen Xu Chao Gao Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Graphene oxide(GO), which consists of two-dimensional(2 D) sp^(2) carbon hexagonal networks and oxygen-contained functional groups, has laid the foundation of mass production and applications of graphene materials. Made by chemical oxidation of graphite, GO is highly dispersible or even solubilized in water and polar organic solvents, which resolves the hard problem of graphene processing and opens a door to wet-processing of graphene. Despite its defects, GO is easy to functionalize, dope, punch holes, cut into pieces, conduct chemical reduction, form lyotropic liquid crystal, and assemble into macroscopic materials with tunable structures and properties as a living building block. GO sheet has been viewed as a single molecule, a particle, as well as a soft polymer material. An overview on GO as a 2 D macromolecule is essential for studying its intrinsic properties and guiding the development of relevant subjects. This review mainly focuses on recent advances of GO sheets, from single macromolecular behavior to macro-assembled graphene material properties. The first part of this review offers a brief introduction to the synthesis of GO molecules. Then the chemical structure and physical properties of GO are presented, as well as its polarity in solvent and rheology behavior. Several key parameters governing the ultimate stability of GO colloidal behavior, including size, p H and the presence of cation in aqueous dispersions, are highlighted. Furthermore, the discovery of GO liquid crystal and functionalization of GO molecules have built solid new foundations of preparing highly ordered, architecture-tunable, macro-assembled graphene materials, including 1 D graphene fibers, 2 D graphene films, and 3 D graphene architectures. The GO-based composites are also viewed and the interactions between these target materials and GO are carefully discussed. Finally, an outlook is provided in this field, where GO is regarded as macromolecules, pointing out the challenges and o

关键词： Graphene 2D macromolecules Macro-assembly

来源：评论

学校读者我要写书评

暂无评论

Insights into the Payne Effect of Carbon Black Filled Styrene-butadiene Rubber Compounds

引用

Chinese Journal of Polymer Science 2021年第1期39卷 81-90,I0007页

作者： An Zhao Xuan-Yu Shi Shi-Hao Sun Hai-Mo Zhang Min Zuo Yi-Hu Song Qiang Zheng Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

As a widely used reinforcing filler of rubber, carbon black(CB) often enhances the nonlinear Payne effect and its mechanism still remains controversial. We adopt simultaneous measurement of rheological and electrical behaviors for styrene-butadiene rubber(SBR)/CB compounds and CB gel(CBG) during large deformation/recovery to investigate the contribution of conductive CB network evolution to the Payne effect of the compounds. In the highly filled compounds, the frequency dependence of their strain softening behavior is much more remarkable than that of their CB network breakdown during loading, while during unloading the unrecoverable filler network hardly affects the complete recovery of modulus, both revealing that their Payne effect should be dominated by the disentanglement of SBR matrix. Furthermore,the bound rubber adjacent to CB particles can accelerate the reconstruction of continuous CB network and improve the reversibility of Payne effect. This may provide new insights into the effect of filler network, bound rubber, and free rubber on the Payne effect of CB filled SBR compounds.

关键词： Payne effect Styrene-butadiene rubber Filler network

来源：评论

学校读者我要写书评

暂无评论

Doxorubicin hydrochloride and L-arginine co-loaded nanovesicle for drug resistance reversal stimulated by near-infrared light

引用

Asian Journal of Pharmaceutical Sciences 2022年第6期17卷 924-937页

作者： Linping Jiang Kesi Wang Liyan Qiu Ministry of Educational(MOE)Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Drug resistance is accountable for the inadequate outcome of chemotherapy in *** newly emerging role of nitric oxide(NO)to conquer drug resistance has been recognized as a potential ***,it remains a great challenge to realize targeted delivery as well as accurate release of NO at desired ***,we developed a PEGylated indocyanine green(m PEG-ICG)integrated nanovesicle system(PIDA)to simultaneously load doxorubicin hydrochloride(DOX·HCl)and the NO donor L-arginine(L-Arg),which can produce NO triggered by NIR light irradiation and exert multimodal therapy to sensitize drug-resistant *** 808 nm irradiation,the NO released from PIDA led to a decrease in mitochondrial membrane potential,an increase in ROS and significant ATP depletion in K562/ADR cells,thus inhibiting cell growth and resolving the problem of drug ***,the in vivo experiment on K562/ADR-bearing nude mice indicated that PIDA nanovesicles achieved significant anticancer efficacy with a tumor inhibition rate of 80.8%.Above all,PIDA nanovesicles offer guidance for designing nanoplatforms for drug-resistant cancer treatment.

关键词： Nitric oxide L-arginine Doxorubicin Indocyanine green Drug resistance Nanovesicle

来源：评论

学校读者我要写书评

暂无评论

Clickable,Oxidation-Responsive and Enzyme-Degradable Polypeptide:synthesis,Characterization and Side Chain Modification

引用

Chinese Journal of Polymer Science 2022年第11期40卷 1360-1368页

作者： Yan-Zhi Lu An-Qi Gu Tian-Lun Shen Ji-Hong Sun Jun Ling Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China Department of Radiology Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhou310016China

Modifications at polypeptide side chains have been found to affect conformational and properties,which is a vital strategy to prepare functional *** contribution describes the synthesis of homo and co-polypeptides containing unsaturated bonds and thioether moieties,poly(S-allylcysteine)(PAC).The pendant vinyl groups provide an active binding site which are able to be further modified with cysteine by thiol-ene click *** sulfoxide from thioether oxidation bestows the polypeptide water solubility and enzymatic catalytic *** selfassembly micelles of PEG-b-PAC are ruptured along with oxidation to release the Nile red ***,poly(S-allyl-cysteine sulfoxide),***,is the oxidation product of PAC which undergoes side chain cleavage catalyzed by alliinase *** polypeptides are biocompatible as confirmed by cell viability assays and may find applications in drug delivery,biosensing and nanoreactor.

关键词： Polypeptides Ring-opening polymerization Stimuli-responsive polymers N-carboxy anhydrides N-phenoxycarbonylα-amino acids

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：