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Spheroids of Endothelial Cells and Vascular Smooth Muscle Cells Promote Cell Migration in Hyaluronic Acid and Fibrinogen Composite Hydrogels

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研究（英文） 2020年第4期 146-160页

作者： Xingang Zuo Haolan Zhang Tong Zhou Yiyuan Duan Hao Shou Shan Yu Changyou Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China Li Dak Sum(&)Yip Yio Chin Center for Stem Cell and Regenerative Medicine Zhejiang University Hangzhou 310058 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China Li Dak Sum(&)Yip Yio Chin Center for Stem Cell and Regenerative Medicine Zhejiang University Hangzhou 310058 China

Cell migration plays a pivotal role in many pathological and physiological *** far,most of the studies have been focused on 2-dimensional cell adhesion and ***,the migration behaviors of cell spheroids in 3D hydrogels obtained by polymerization of methacrylated hyaluronic acid(HA-MA)and fibrinogen(Fg)with different ratios were *** Fg could be released to the medium gradually along with time prolongation,achieving the dynamic change of hydrogel structures and *** types of cell spheroids,i.e.,endothelial cell(EC),smooth muscle cell(SMC),and EC-SMC spheroids,were prepared with 10,000 cells in each,whose diameters were about 343,108,and 224μm,*** composite hydrogels with an intermediate ratio of Fg allowed the fastest 3D migration of cell *** ECs-SMCs migrated longest up to 3200 μm at day 14,whereas the SMC spheroids migrated slowest with a distance of only～400μm at the same period of *** addition of free RGD or anti-CD44 could significantly reduce the migration distance,revealing that the cell-substrate interactions take the major roles and the migration is mesenchymal ***,addition of anti-N-cadherin and MMP inhibitors also slowed down the migration rate,demonstrating that the degradation of hydrogels and cell-cell interactions are also largely involved in the cell ***-PCR measurement showed that expression of genes related to cell adhesion and antiapoptosis,and angiogenesis was all upregulated in the EC-SMC spheroids than single EC or SMC spheroids,suggesting that the use of composite cell spheroids is more promising to promote cell-substrate interactions and maintenance of cell functions.

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Conformation Engineering of Two-Dimensional Macromolecules:A Case Study with Graphene Oxide

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Accounts of Materials Research 2020年第3期1卷 175-187页

作者： Yanqiu Jiang Ya Wang Zhen Xu Chao Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027P.R.China Graphene Industry and Engineering Research Institute Xiamen UniversityXiamen 361005P.R.China

CONSPECTUS:Two-dimensional sheets,a new family of macromolecules with 2D topology,are posed to rapidly extend material technologies and indispensably shape our *** great expectations of 2D macromolecules urgently call not only a unified understanding of their macromolecular behavior in the new 2D topology but also a general methodology to guide the precise fabrication to achieve disruptive performances of their macroscopic *** by these mutual fundamental problems,we have explored the conformation principle of 2D macromolecules and established a systematic routine for macroscopically assembled materials,in the model of graphene *** Account concludes our recent works in investigating macromolecular conformations and condensed states of 2D graphene oxide and initializes a conceptually new methodology of conformation engineering of 2D *** analogy with classic 1D polymers,we have depicted a systematical conformation map of graphene oxide extending from individual to multiple *** conformation map unifies the theoretic description and experimental observations,establishing the conformation principle of 2D *** have found rich liquid crystalline phases of graphene oxide and uncovered their extremely slow relaxation *** have created a liquid meta-crystal of graphene oxide,a new mesophase state with stable meta-periodicity beyond ordinary molecular order,by the invented shearing microlithography to achieve the free design and control of artificial *** proposed conformation engineering concept has underpinned the versatile design and rational control of multiscale structures of graphene macroscopic materials and promoted advanced performances of graphene fibers,films,and *** conformation principle in the case of graphene oxide can establish a unified theory of 2D polymers after the classic 1D *** conformation engineering will become a useful concept to depict the systematic“fabr

关键词： macroscopic unified analogy

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Intercalation Engineering of Nickle-Cobalt-Layered Double Hydroxide for Long-Lifespan Supercapacitor

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SSRN 2023年

作者： Hu, Wenxuan Chen, Lu Geng, Biao Song, Yihu Wu, Ziliang Zheng, Qiang Shan, Gurong Du, Miao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310058 China Zhejiang Provincial Key Lab for Chemical and Biological Processing Technology of Farm Product School of Biological and Chemical Engineering Zhejiang University of Science and Technology Hangzhou310023 China State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University Hangzhou310058 China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030000 China

Layered double hydroxides (LDHs), a class of 2D lamellar intercalating materials, is a promising candidate for high-performance supercapacitors, while its poor cycling stability has always been its Achille’s heel. Although doping metal ions into the host layer is proved to be an effective way to improve the weakness, the effects of intercalated anions on cycling performance have been rarely studied and highly underestimated. In this paper, we prepared a group of NiCo-LDHs with different intercalated anions, including NO3-, Cl-, SO42-, MoO42- and WO42-, which expand the interlayer spacing from 0.73 to 1.07 nm. Interestingly, although expanding the interlayer spacing could increase the specific capacity by providing more electrochemical active sites, it could not guarantee the improvement in cycling performance and rate capability. The correlation between interlayer spacing and cycling performance exhibits a "volcano" plot. The MoO42- intercalated NiCo-LDH with a 0.96 nm interlayer spacing delivers a high specific capacity of 795 C g-1 and the best cycling stability with 80% capacity retention after 20000 cycles, which is better than NiCo-LDH-NO3 (0.73 nm, 50% after 3000 cycles) and NiCo-LDH-WO4 (1.07 nm, 64% after 20000 cycles). By combining the results with the DFT method, the effects of intercalated anion on cycling performance are illustrated. In addition, the asymmetric supercapacitor also exhibits an excellent cycling stability with ~100% capacity retention after 10000 cycles. This study provides new insight to the compositional design of LDH-based electrodes for long-lifespan supercapacitors. © 2023, The Authors. All rights reserved.

关键词： Cobalt compounds

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Microporous Matrimid/Pim-1 Thin Film Composite Membranes with Narrow Pore Size Distribution Used for Precise Molecular Separation in Organic Solvents

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SSRN 2022年

作者： Li, Jiaqi Feng, Weilin Zhang, Mengxiao Wang, Xiaohe Fang, Chuanjie Zhang, Lin Zhu, Liping MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China MOE Engineering Research Center of Membrane and Water Treatment Technology Zhejiang University Hangzhou310027 China College of Chemical & Biological Engineering Zhejiang University Hangzhou310027 China

Precise separation at the molecular level is highly demanded in the chemical and pharmaceutical industry. Traditional polyamide nanofiltration membranes have wide pore size distribution and are difficult to achieve high separation accuracy. Herein, we report the design, preparation, and structure-property relationship of microporous Matrimid/PIM-1 thin film composite (TFC) membranes used for precise molecular separation in organic solvents. A typical polymer of intrinsic microporosity (PIM), abbreviation PIM-1, was employed as the selective layer material of TFC membranes to achieve high solvent permeation flux. A soluble linear polyimide, Matrimid, was incorporated into PIM-1 by solution blending to control the pore size distribution of the selective layer. The component miscibility, pore characteristics, and molecular separation performances of the Matrimid/PIM-1 TFC membranes were investigated in detail. It was found that Matrimid and PIM-1 are partially miscible due to their similar Hansen solubility parameters. The pore size distribution of the Matrimid/PIM-1 blends range from 5.1 to 5.8 Å, which is significantly narrower than that of pure PIM-1 (4.5-6.8 Å) due to more compact chain packing. The prepared Matrimid/PIM-1 TFC membranes showed a distinct difference in the retention towards riboflavin (80%) and isatin (only 5%) in ethanol medium, showing its great potential in precise molecular separation. © 2022, The Authors. All rights reserved.

关键词： Pore size

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New Insights into the Nature of Ti(Ii) and Ti(Iii) Active Sites in the Heterogeneous Ziegler−Natta Catalyst

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SSRN 2022年

作者： Guo, Xing Liu, Zhen Fan, Zhiqiang Liu, Boping School of Chemical Engineering East China University of Science and Technology Shanghai200237 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China College of Materials and Energy South China Agricultural University Guangzhou510642 China

This work presents new insights into the nature of the rarely studied Ti(II) active sites in the heterogeneous Ziegler−Natta catalyst. The effect of diethylaluminum chloride (DEAC) on the Ti(II) and Ti(III) active sites as well as their olefin insertion behaviors were systematically investigated by density functional theory (DFT) calculations. The adsorption behaviors of AlR n Cl 3-n species (R=Me, Et, and i Bu;n=1,2,3) on the bare Ti(II) active site indicate a more stable bridge mode than the monodentate mode due to the appreciable attraction between the coordinated atom and the Ti center. The two adsorption modes of DEAC on the bare Ti(II) active site (Model A), Model B for the monodentate adsorption and Model C for bridge adsorption, have a significant influence on both the geometries of the Ti(II) active sites and the electronic properties of the Ti center. The lower apparent activation energies of propylene insertion than ethylene insertion for the Ti(III) active sites (Model D and Model E) indicate that the Ti(III) active sites are considered to produce copolymer with a high α -olefin content in ethylene/ α -olefin copolymerization. The opposite trend in the Ti(II) active sites (Model B and Model C) suggests they may produce the copolymer with a low α -olefin content in ethylene/ α -olefin copolymerization. In addition, Model B is considered to be the active site to produce oligomers, owing to its lower Δ G AT value (corresponding to termination) than Δ G AI value (corresponding to insertion) that leads to a high tendency for occurrence of termination. © 2022, The Authors. All rights reserved.

关键词： Density functional theory

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Metal Nanoclusters as Highly Efficient, Versatile Type-II Photoinitiators via Generating Radicals from Non-Conventional Hydrogen Donors

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Angewandte Chemie 2025年第12期137卷

作者： Zijie Chen Jin Tang Letian Zheng An Ren Prof. Liang Ma Prof. Qi Li Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310058 China The State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical Engineering Zhejiang University Hangzhou 310058 China

Development of highly efficient photocatalysis or photoinitiation systems that are applicable to various types of illumination source is critical to virtually all the light-driven applications. Here, we report a generalizable strategy to achieve highly sensitive, versatile photoinitiation systems based on the combination of metal nanoclusters with non-conventional hydrogen donors (co-initiators). Discovery of this type-II photoinitiation pathway in metal nanoclusters not only improves their two-photon initiation sensitivity by up to three-orders-of-magnitude, it further opens the door for metal nanoclusters to trigger the photopolymerization using the low-power UV light-emitting diodes. Different from molecular type-II photoinitiators, we found that the selection rules of hydrogen donors for metal nanoclusters are largely dependent on their ligand structures. More importantly, using electron paramagnetic resonance and mass spectroscopy, we for the first time demonstrate that the photoexcited metal nanoclusters can function as versatile hydrogen atom abstractors which generate various types of previously unreported thiyl and nitrogen-centered radicals. This finding indicates the broad opportunity of the future application of metal nanoclusters in light-driven organic synthesis and radical chemistry.

关键词： metal nanoclusters photocatalysis photoinitiators thiyl radicals nitrogen-centered radicals

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Corrigendum to "A dual lubricating and antibacterial hydrogel coating containing hyperbranched polylysine with excellent biocompatibility for surface modification of central venous catheters" [Chem. Eng. J. 509 (2025) 161402] (Chemical Engineering Journal (2025) 509, (S1385894725022247), (10.1016/***.2025.161402))

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Chemical Engineering Journal 2025年 513卷

作者： Shao, Bohui Wang, Xuelong Huang, Lei Liu, Xiaowei Wang, Liming Zheng, Weiwei Gao, Changyou MOE Key Laboratory of Macromolecular Synthesis and Functionalization International Research Center for X Polymers Department of Polymer Science and Engineering Zhejiang University Hangzhou310058 China Center for Healthcare Materials Shaoxing Institute Zhejiang University Shaoxing312099 China Zhejiang Haisheng Medical Device Company Co. Ltd. Shaoxing312099 China Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine Zhejiang University Hangzhou310058 China

The authors regret, Fig. 5 and Fig. 7 in addition with the captions of Fig. 4 and Fig. 6 in this article. The revised Fig. 5 mainly contained picture orientation modification of the DAPI staining image of Commercial group. The revised Fig. 7 mainly contained supplementary modification of the HE staining image of HP group. The revised captions of Fig. 4 and Fig. 6 mainly contained modification of statistical significance. These revisions do not influence on the conclusions of the study. Revised Fig. 5[Figure presented] Revised Fig. 7[Figure presented] Revised caption for Fig. 4: Fig. 4. Antibacterial and biocompatibility evaluation in vitro. (A,B) Colonies and statistical values of the non-adherent and adherent methicillin-resistant Staphylococcus aureus (MRSA) and Escherichia coli (E. coli) after incubation on different polyurethane sheet surfaces for 24 h (n = 5). (C) SEM images showing the morphology of MRSA and *** after being incubated on different catheter surfaces. (D) 3D CLSM images of mature MRSA biofilms on different catheter surfaces after incubation of 48 h using SYTO-9/PI staining. (E) Live/Dead staining of L929 and HUVEC after being incubated with extracts of different catheters for 24 h and 72 h, respectively, and (F) OD450 of L929 and HUVEC after being incubated with extracts of different catheters for 24 h and 72 h using CCK-8 assay (n = 5), respectively. (G) BSA adhesion on different catheter surfaces (n = 6). (H, I) The digital images and statistical results of hemolysis rates of different catheters after being incubated with diluted anticoagulant sheep blood at 37 °C for 1 h (n = 6). (J) Activated partial prothrombin time (APTT) of different catheter surfaces after being incubated with platelet-poor plasma at 37 °C for 5 min (n = 6). *, **, *** and **** represent p © 2025 Elsevier B.V.

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Inverted Perovskite Solar Cells Based on Small Molecular Hole Transport Material C8-Dioctylbenzothienobenzothiophene

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Chinese Journal of Chemistry 2019年第12期37卷 1239-1244页

作者： Xiaomei Lian Jiehuan Chen Yingzhu Zhang Gang Wu Hongzheng Chen State Key Laboratory of Silicon Materials Zhejiang UniversityHangzhouZhejiang 310027China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhouZhejiang 310027China

Summary of main observation and conclusion The small organic molecular Dioctylbenzothienobenzothiophene(C8-BTBT)has been explored as hole transport material(HTM)to replace PEDOT:PSS in inverted perovskite solar cells(PVSCs).MAPbl3 perovskite films depositd onto C8-BTBT are smooth and uniform,with negligible residual of Pbl2 and large grain size even larger than 1μ*** champion C8-BTBT based devices reached a high power conversion efficiency(PCE)of 15.46%with marginal hysteresis,much higher than that of 11.50%achieved using PEDOT:***,devices adopting C8-BTBT as substrate show superior stability compared with the PEDOT:PSS based devices when stored under ambient conditions with a relative humidity of(25+5)%.

关键词： perovskite Solar replace

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Correction:Nanomaterial-Based Repurposing of Macrophage Metabolism and Its Applications

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Nano-Micro Letters 2024年第12期16卷 357-357页

作者： Tingting Meng Danfeng He Zhuolei Han Rong Shi Yuhan Wang Bibo Ren Cheng Zhang Zhengwei Mao Gaoxing Luo Jun Deng Institute of Burn Research Southwest HospitalState Key Laboratory of Trauma and Chemical PoisoningArmy Medical UniversityChongqing 400038People’s Republic of China Department of Breast Surgery Gansu Provincial HospitalLanzhouGansu 730030People’s Republic of China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Following publication of the original article[1],the authors reported an error in the last author’s name,it was mistakenly written as“Jun Den”.The correct author’s name“Jun Deng”has been updated in this Correction.

关键词： mistake correct Correction

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The potential of pervaporation for biofuel recovery from fermentation:An energy consumption point of view

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Chinese Journal of Chemical Engineering 2019年第6期27卷 1296-1306页

作者： Peiyao Zheng Chong Li NaixinWang Jie Li Quanfu An MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science&EngineeringZhejiang UniversityHangzhou 310027China Beijing Key Laboratory for Green Catalysis and Separation College of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China

Recovering alcohols from dilute fermentation broth is an emergent task in bio-fuel production process. Since they are primary planned for fuels, energy required to separate these alcohols should be considered in evaluating the potential of a separation technology. A membrane-based process, pervaporation, is of special interest because of its environmental friendliness and easy integrating character. This review probes into the fundamentals of pervaporation especially in terms of the heat required for evaporation. Meanwhile, the separation data of the most representative alcohol-selective pervaporation membranes reported in the literatures are collected and compared with the vapor–liquid equilibrium curve, which represents the distillation selectivity. They include:inorganic membranes, silicon rubber based membranes, Mixed Matrix Membranes and some other special materials. By doing so, the status of alcohol recovery via pervaporation would be more clear for *** ethanol recovery, it is selectivity rather than flux that is in urgent need of solution. While for butanol recovery,membranes with satisfactory selectivity have been developed, increasing the separation capacity would be more pressing.

关键词： Bio-alcohol Pervaporation Energy Selectivity Vapor-liquid equilibrium

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