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Chinese Journal of Polymer Science 2017年第1期35卷 123-129页

作者： jun liang 单国荣 peng-ju pan State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China

Controlled and homogeneous flee-radical polymerization of acrylamide （AM） in aqueous phase was realized by using S,S＇-bis（α, α＇-dimethyl-α＂-acetic acid）-trithiocarbonate as a reversible addition-fragmentation transfer （RAFT） agent. Linear increases in molecular weight with conversion and narrow molecular weight distribution were observed for polyacrylamide （PAM） throughout the polymerization. By this method, PAMs with controlled molecular weight （up to 1.0 ~ 106） and narrow molecular weight distribution （Mw/Mn 〈 1.2） were prepared. This study provides an effective method for synthesis of PAMs with narrow molecular weight distribution under environmentally friendly conditions.

关键词： Homogeneous aqueous RAFT polymerization Polyacrylamide Controlled molecular weight Narrow molecularweight distribution

Viscoelastic Property Evolution of Thermoplastic Polyurethane during Annealing Treatment and Its Correlation with Segmental Crystallization

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Chinese Journal of Polymer Science 2024年第12期42卷 1976-1985,I0010页

作者： Jian-Wen Shan Yan-Bo Zhu Ling-Ling Ni peng-ju pan State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310058China Department of Polymer Science and Engineering Zhejiang UniversityHangzhou310058China

Viscoelastic properties of thermoplastic polyurethane(TPU)is of fundamental importance for its *** this work,we prepared different TPUs from polycaprolactone(PCL)diol,diphenylmethane-4,4′-diisocyanate(MDI),and 1,4-butanediol(BDO),and investigated the viscoelastic behavior of three TPUs with different hard segment content during thermal annealing *** storage modulus(G′)of TPU increases over time in a medium annealing temperature(T_(a))region,but remains unchanged at both high and low temperature *** growth of loss modulus(G″)over time is slower than that of G′.At medium T_(a),both G′and G″increase during the repeating frequency(ω)sweep,due to the gradual crystallization of hard *** indicates that the crystallites primarily restrain the relaxation of unit with large *** increments of G′and G″are weakened when the content of hard segment in TPU is *** TPU with high content of hard segments,a complete high elastic platform with a width of 3 orders of magnitude was observed only through one frequency scan test at medium T_(a).In addition,the crystallites of hard segments grow up continuously during frequency scan test(isothermal annealing treatment)and cause the extreme increase in G′and G″withωin lowωregion.

关键词： Thermoplastic polyurethane Viscoelastic properties Annealing Crystalization

Temperature-dependent Crystallization and Phase Transition of Poly(L-lactic acid)/CO_(2) Complex Crystals

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Chinese Journal of Polymer Science 2021年第4期39卷 484-492,I0007页

作者： Ying Zheng Cai-Liang Zhang Yong-Zhong Bao Guo-Rong Shan peng-ju pan State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University-Quzhou Quzhou 324000China

Semicrystalline polymers can crystallize in the unique crystalline polymorph and show different phase behaviors under the high-pressure CO_(2) *** such unique crystallization and phase transition behavior is of fundamental importance for the CO_(2)-assisited processing of semicrystalline ***,we investigated the polymorphic crystalline structure,phase transition,and structure-property relationships of poly(L-lactic acid)(PLLA)treated by CO_(2) at different pressures(1-13 MPa)and crystallization temperatures(Tc's,10-110℃).PLLA crystallized in the PLLA/CO_(2) complex crystals under 7-13 MPa CO_(2) at TCS50℃but the common a crystals under the high-pressure CO_(2) at TC≥70℃.Solid-state nuclear magnetic resonance analysis indicated that the PLLA/CO_(2) complex crystals possessed weaker interactions between the PLLA chains than the common a *** PLLA/CO_(2) complex crystals were metastable and transformed into the thermally stable a crystals via the solid-to-solid route during heating or annealing at the temperature above 50℃.The complex crystals of PLLA produced at low Tc was more ductile than the a crystals due to the lower crystallinity and the plasticizing effect of CO_(2).

关键词： Poly(lactic acid) CO_(2) Complex crystal Phase transition

Fractionated Crystallization Kinetics and Polymorphic Homocrystalline Structure of Poly(_(L)-lactic acid)/Poly(_(D)-lactic acid)Blends:Effect of Blend Ratio

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Chinese Journal of Polymer Science 2022年第6期40卷 567-575页

作者： Wang-Kai Xiang Qing Xie Shan-Shan Xu Chen-Xuan Sun Cheng-Tao Yu Ying Zheng peng-ju pan State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University-Quzhou Quzhou 324000China

Stereocomplex(SC)crystallization has been an effective way to improve the physical performances of stereoregular ***,the competition between homo and SC crystallizations can lead to more complicated crystallization kinetics and polymorphic crystalline structure in stereocomplexable polymers,which influences the physical properties of obtained ***,we select the medium-molecular-weight(MMW)poly(L-lactic acid)/poly(D-lactic acid)(PLLA/PDLA)asymmetric blends with different PDLA fractions(f_(D)=0.01-0.5)as the model system and investigate the effects of f_(D) and crystallization temperature(T_(c))on the crystallization kinetics and polymorphic crystalline *** observe the fractionated(i.e.,multistep)crystallization kinetics and the formation of peculiar β-form homocrystals(HCs)in the asymmetric blends under quiescent conditions,which are strongly influenced by both f_(D) and T_(c).Precisely,crystallization of β-form HCs is favorable in the MMW PLLA/PDLA blends with high f_(D)(≥0.2)at a low T_(c)(80-100℃).It is proposed that the formation of metastable β-form HCs is attributed to the conformational matching between β-form HCs and SCs,and the stronger constrain effects of precedingly-formed SCs in the early stage of *** effects can also cause the multistep crystallization kinetics of MMW PLLA/PDLA asymmetric blends in the heating process.

关键词： Poly(lactic acid) Stereocomplex crystallization Polymorphic structure Crystallization kinetics

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高分子立构复合结晶的研究进展

高分子学报 2017年第6期27卷 893-905页

作者：谢青包建娜余承涛单国荣包永忠潘鹏举浙江大学化学工程与生物工程学院化学工程联合国家重点实验室杭州310027

立构复合结晶是高分子结晶中的一种普遍现象,也是不同高分子之间共结晶的特殊形式.互为立体异构高分子在共混物和立体嵌段共聚物中可形成立构复合结晶.由于这种独特的链凝聚结构,立构复合结晶材料与相应的同质结晶材料的性能显著不同,... 详细信息

立构复合结晶是高分子结晶中的一种普遍现象,也是不同高分子之间共结晶的特殊形式.互为立体异构高分子在共混物和立体嵌段共聚物中可形成立构复合结晶.由于这种独特的链凝聚结构,立构复合结晶材料与相应的同质结晶材料的性能显著不同,立构复合结晶通常可提高高分子材料的熔点、耐热性、结晶能力、结晶度、机械力学性能、耐溶剂性能等.通过立构复合结晶,可使一些非晶或难结晶的高分子转变为可结晶或高结晶度的状态,从而实现材料性能的转变.因此,互为立体异构高分子之间的立构复合结晶为聚合物材料的性能优化和调控提供了有效的途径.文献已报道了多类可立构复合结晶的聚合物体系,包括脂肪族聚酯、脂肪族聚碳酸酯、聚甲基丙烯酸酯、聚酰胺和聚酮等.本文根据聚合物化学结构的不同,针对文献已报道的可立构复合结晶的高分子体系,综述了其立构复合结晶的形成条件、结构特征与物理性质.

关键词：立构复合结晶聚酯聚碳酸酯结晶结构热性能

Construction of 3D porous Cu_(1.81)S/nitrogen-doped carbon frameworks for ultrafast and long-cycle life sodium-ion storage

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 191-200页

作者： Chen Chen Hongyu Xue Qilin Hu Mengfan Wang pan Shang Ziyan Liu Tao peng Deyang Zhang Yongsong Luo Key Laboratory of Microelectronics and Energy of Henan Province Henan Joint International Research Laboratory of New Energy Storage TechnologyCollege of Physics and Electronic EngineeringXinyang Normal UniversityXinyang 464000China School of Physics and Electronic Engineering Nanyang Normal UniversityNanyang 473061China

Transition metal sulfides have great potential as anode mterials for sodium-ion batteries(SIBs)due to their high theoretical specific ***,the inferior intrinsic conductivity and large volume variation during sodiation-desodiation processes seriously affect its high-rate and long-cyde performance,unbeneficial for the application as fast-charging and long-cycling SIBs ***,the three-dimensional porous Cu_(1.81)S/nitrogen-doped carbon frameworks(Cu_(1.81)S/NC)are synthesized by the simple and facile sol-gel and annealing processes,which can accommodate the volumetric expansion of Cu_(1.81)S nanoparticles and accelerate the transmission of ions and electrons during Na^(+)insertion/extraction processes,exhibiting the excellent rate capability(250.6 mA·g^(-1)at 20.0 A·g^(-1))and outstanding cycling stability(70% capacity retention for 6000 cycles at 10.0 A·g^(-1))for ***,the Na-ion full cells coupled with Na_(3)V_(2)(PO_(4))_(3)/C cathode also demonstrate the satisfactory reversible specific capacity of 330.5 mAh·g^(-1)at 5.0 A·g^(-1)and long-cycle performance with the 86.9% capacity retention at 2.0 A·g^(-1)after 750 *** work proposes a promising way for the conversionbased metal sulfides for the applications as fast-charging sodium-ion battery anode.

关键词： copper sulfide nanoparticles porous carbon framework fast charging long-cycle performance sodium-ion full batteries

Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-Yan Huang Yi-De Zhang Jie Chen Hai-Di Fan Wan Wang Bin Wang ju-Yun Ma peng-peng Li Hai-Wei Pu Xin-Yian Guo Jian-Gang Shen Su-Hua Qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

Gut-brain axis as a bridge in obesity and depression:Mechanistic exploration and therapeutic prospects

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World Journal of Psychiatry 2025年第1期15卷 12-20页

作者： Rui-Ying Fang Xiao-Rui pan Xin-Xing Zeng Zheng-Zheng Li Bo-Fan Chen Hai-Min Zeng Jie peng The Second Clinical Medical College The Second Affiliated HospitalJiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina

A recent study by Wang et al,published in the World Journal of Psychiatry,provided preventative and therapeutic strategies for the comorbidity of obesity and *** gut-brain axis,which acts as a two-way communication system between the gastrointestinal tract and the central nervous system,plays a pivotal role in the pathogenesis of these *** suggests that metabolic byproducts,such as short-chain fatty acids,lipopolysaccharide and bile acids,which are generated by the gut microbiota,along with neurotransmitters and inflammatory mediators within the gut-brain axis,modulate the host's metabolic processes,neuronal regulation,and immune responses through diverse *** interaction between obesity and depression via the gut-brain axis involves disruptions in the gut microbiota balance,inflammatory immune responses,and alterations in the neuroendocrine *** the gut-brain axis,for example,through a ketogenic diet,the use of probiotics,and the supplementation of antioxidants,offers new remedial approaches for obesity and *** research that explores the mechanisms of the gut-brain axis is needed to provide more evidence for clinical treatment.

关键词： Gut-brain axis Obesity Depression Gut microbiota Mechanism

Molecular mechanism and research progress of traditional Chinese medicine in the treatment of prostate cancer

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Traditional Medicine Research 2025年第1期10卷 62-72页

作者： Hai-Luo Wang Ruo-Ran Zhang Hao Wang peng Xu Jing-Kai Wang Bo Chen Hao Xu Deng pan Yu-Yang Ma Kun pang Department of Urology Xuzhou Central HospitalXuzhou Clinical School of Xuzhou Medical CollegeXuzhou 221009China Graduate School Jiangsu UniversityZhenjiang 212013China Graduate School Bengbu Medical UniversityBengbu 233040China Department of Urology The Peixian People’s HospitalXuzhou 221699China.

Prostate cancer(PCa)is one of the most common malignant tumors in the male genitourinary system,ranking second in incidence *** Chinese medicine(TCM),as an important component of complementary and alternative medicine,shows unique advantages in cancer *** herbal medicine is usually composed of multiple ingredients and involves multiple signaling pathways,which showed function of inducing apoptosis of cancer cells,arresting the cell cycle,inhibiting invasion and metastasis,reducing drug resistance,and regulating immune *** therapy is also an important treatment of ***,Physical therapy such as acupuncture or Tai Chi and Qigong are gaining increased recognition in the management of PCa,particularly in addressing issues like urinary incontinence and bone metastasis-related *** article reviews the TCM treatment and therapy of PCa,in order to provide new research avenues and treatment options for the treatment of PCa with TCM and improve the quality of life of patients.

关键词： traditional Chinese medicine prostate cancer Chinese herbal medicine physical therapy

Deciphering the role of mtH2O2 in hepatic ischemia-reperfusion injury mechanisms with low-background super-resolution fluorogenic probe

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Science China Chemistry 2025年第1期 297-307页

作者： Bin Fang Limin Wang Haoqin Li Jiaxin Zhang Yang Ding pan pan Li Bo peng Hua Bai Lin Li Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials &Engineering Northwestern Polytechnical University Institute of Flexible Electronics (IFE Future Technologies) Xiamen University

Hepatic ischemia-reperfusion injury（HIRI） is characterized by mitochondrial dysfunction and oxidative stress. Monitoring mitochondrial hydrogen peroxide（mtH2O2） levels in real-time through super-resolution imaging is crucial for elucidating its distribution in live cells and its mechanism of action during HIRI. However, low-background fluorogenic probes have been overlooked in the context of super-resolution imaging. In this study, we developed a low-background fluorogenic probe（MitoWG） with the potential for super-resolution morphology-correlated mitochondrial identification to track the fluctuates of mtH2O2in HIRI. Activation of the desirable fluorescence properties of the probe by mtH2O2was confirmed using structural illumination microscopy（SIM）, enabling high-quality mitochondrial imaging with exceptional specificity and *** in mtH2O2levels were successfully observed in both cellular and rat models of HIRI. Furthermore, we associated the decline in mitochondrial redox homeostasis with accelerated mtH2O2production during HIRI, which triggered mitophagy deficiency and led to cell death. In conclusion, Mito-WG possesses excellent photophysical and low-background properties for SIM imaging, making it a promising tool for mtH2O2tracking in HIRI research and clinical diagnosis.

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