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Silicon lithium-ion battery anode with enhanced performance： Multiple effects of silver nanoparticles

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Journal of Materials Science & Technology 2018年第10期34卷 1902-1911页

作者： Shanshan Yin Qing Jia Xiuxia Zuo Shuang Xie Kai Fang Yonggao Xia Jinlong Li Bao Qiu Meimei wang Jianzhen Ban Xiaoyan wang Yi Zhang Ying Xiao Luyao Zheng Suzhe Liang Zhaoping Liu cundong wang Ya-Jun Cheng Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China North University of China Taiyuan 030051 China The University of Nottingham Ningbo China Ningbo 315100 China Nano Science and Technology Institute University of Science and Technology of China Suzhou 215123 China Department of Materials University of Oxford Parks Rd. OX1 3PH Oxford UK

Silicon has been regarded as one of the most promising next generation lithium-ion battery anode. How- ever, the poor cyclic stability of the Si based anode has severely limited its practical applications, which is even worse with high mass loading density （〉1 mg cm^-2 ）. A new concept has been developed to enhance the electrochemical performance of the Si nanoparticle anode. Silver nanoparticles are composited with the silicon nanoparticles in a facile way for the first time. It is found that the mechanical properties of the Si electrode have been significantly improved by the incorporation of the silver nanoparticles, leading to enhanced cyclic performance. With the Si/Ag mass ratio of 4：1, the reversible specific discharge capacity is retained as l 156 mA h g^-1 after 100 cycles at 200 mAg^-1, which is more than three times higher than that of the bare silicon （318 mA h g^-1 ）. The rate performance has been effectively improved as well due to excellent electron conductivity of the silver nanoparticles.

关键词： Silicon Silver Nanoparticles Nanocomposite Lithium-ion battery Anode

大分子引发端羟基PPO-PTHF-PPO嵌段共聚醚的合成和表征

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高分子材料科学与工程 2011年第4期27卷 1-4页

作者：汪存东罗运军夏敏北京理工大学材料学院北京100081 中北大学化工学院山西太原030051

以大分子聚四氢呋喃醚二醇为引发剂,三氟化硼乙醚络合物为催化剂,环氧丙烷经阳离子开环聚合,直接在聚四氢呋喃醚二醇的两端接上了聚环氧丙烷的链段,从而制备出了一种全新结构的PPO-PTHF-PPO端羟基三嵌段共聚醚;通过红外光谱、核磁共振(1... 详细信息

以大分子聚四氢呋喃醚二醇为引发剂,三氟化硼乙醚络合物为催化剂,环氧丙烷经阳离子开环聚合,直接在聚四氢呋喃醚二醇的两端接上了聚环氧丙烷的链段,从而制备出了一种全新结构的PPO-PTHF-PPO端羟基三嵌段共聚醚;通过红外光谱、核磁共振(1H-NMR和13C-NMR)对产物进行了表征,通过凝胶渗透色谱测出了产物的相对分子质量。研究了反应条件对聚合产率以及产物相对分子质量的影响,结果表明,反应温度为0℃,反应时间为5h,催化剂用量为环氧丙烷摩尔数的3%时最为理想,并且可以通过大分子引发剂的用量来调节共聚醚产物的相对分子质量。

关键词：聚四氢呋喃醚二醇嵌段共聚醚环氧丙烷阳离子开环聚合

Exogenous melatonin improves cotton yield under drought stress by enhancing root development and reducing root damage

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Journal of Integrative Agriculture 2024年第10期23卷 3387-3405页

作者： Lingxiao Zhu Hongchun Sun Ranran wang Congcong Guo Liantao Liu Yongjiang Zhang Ke Zhang Zhiying Bai Anchang Li Jiehua Zhu cundong Li State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of HebeiProvince/College of Agronomy Hebei Agricultural UniversityBaoding 071000China College of Plant Protection Hebei Agricultural UniversityBaoding 071000China

The exogenous application of melatonin by the root drenching method is an effective way to improve crop drought ***,the optimal concentration of melatonin by root drenching and the physiological mechanisms underlying melatonin-induced drought tolerance in cotton(Gossypium hirsutum L.)roots remain *** study determined the optimal concentration of melatonin by root drenching and explored the protective effects of melatonin on cotton *** results showed that 50μmol L-1 melatonin was optimal and significantly mitigated the inhibitory effect of drought on cotton seedling *** melatonin promoted root development in drought-stressed cotton plants by remarkably increasing the root length,projected area,surface area,volume,diameter,and *** also mitigated the drought-weakened photosynthetic capacity of cotton and regulated the endogenous hormone contents by regulating the relative expression levels of hormone-synthesis genes under drought ***-treated cotton seedlings maintained optimal enzymatic and non-enzymatic antioxidant capacities,and produced relatively lower levels of reactive oxygen species and malondialdehyde,thus reducing the drought stress damage to cotton roots(such as mitochondrial damage).Moreover,melatonin alleviated the yield and fiber length declines caused by drought *** together,these findings show that root drenching with exogenous melatonin increases the cotton yield by enhancing root development and reducing the root damage induced by drought *** summary,these results provide a foundation for the application of melatonin in the field by the root drenching method.

关键词： cotton drought melatonin root morphology root physiology yield

Ferroptosis mechanism and Alzheimer's disease

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Neural Regeneration Research 2024年第8期19卷 1741-1750页

作者： Lina Feng Jingyi Sun Ling Xia Qiang Shi Yajun Hou Lili Zhang Mingquan Li cundong Fan Baoliang Sun Shandong Key Laboratory of TCM Multi-Target Intervention and Disease Control the Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina Department of Internal Medicine Taian Traffic HospitalTaianShandong ProvinceChina Department of Neurology the Third Affiliated Clinical Hospital of Changchun University of Chinese MedicineChangchunJilin ProvinceChina

Regulated cell death is a genetically determined form of programmed cell death that commonly occurs during the development of living *** process plays a crucial role in modulating homeostasis and is evolutionarily conserved across a diverse range of living *** is a classic regulatory mode of cell *** studies of regulatory cell death in Alzheimer’s disease have yielded increasing evidence that fe rroptosis is closely related to the occurrence,development,and prognosis of Alzheimer’s *** review summarizes the molecular mechanisms of ferroptosis and recent research advances in the role of ferro ptosis in Alzheimer’s *** findings are expected to serve as a theoretical and experimental foundation for clinical research and targeted therapy for Alzheimer’s disease.

关键词： Alzheimer’s disease apolipoprotein E Fe^(2+) ferroptosis glial cell glutathione peroxidase 4 imbalance in iron homeostasis lipid peroxidation regulated cell death system Xc^(-)

Increasing root-lower characteristics improves drought tolerance in cotton cultivars at the seedling stage

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Journal of Integrative Agriculture 2024年第7期23卷 2242-2254页

作者： Congcong Guo Hongchun Sun Xiaoyuan Bao Lingxiao Zhu Yongjiang Zhang Ke Zhang Anchang Li Zhiying Bai Liantao Liu cundong Li State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy Hebei Agricultural UniversityBaoding 071001China

Drought is an important abiotic stress factor in cotton *** root system architecture(RSA)of cotton shows high plasticity which can alleviate drought-related stress under drought stress(DS)conditions;however,this alleviation is cultivar ***,this study estimated the genetic variability of RSA in cotton under *** the paper-based growth system,we assessed the RSA variability in 80 cotton cultivars at the seedling stage,with 0 and10%polyethylene glycol 6000(PEG6000)as the control(CK)and DS treatment,*** analysis of 23 aboveground and root traits in the 80 cotton cultivars revealed different responses to *** the 10th day after DS treatment,the degree of variation in the RSA traits under DS(5–55%)was greater than that of CK(5–49%).The 80 cultivars were divided into drought-tolerant cultivars(group 1),intermediate drought-tolerant cultivars(group 2),and drought-sensitive cultivars(group 3)based on their comprehensive evaluation values of drought *** DS,the root lengthlower,root area-lower,root volume-lower,and root length density-lower were significantly reduced by 63,71,76,and 4%in the drought-sensitive cultivars compared to ***,the drought-tolerant cultivars maintained their root lengthlower,root area-lower,root volume-lower,and root length density–lower *** to CK,the root diameter(0–2 mm)-lower increased by 21%in group 1 but decreased by 3 and 64%in groups 2 and 3,respectively,under ***,the drought-tolerant cultivars displayed a plastic response under DS that was characterized by an increase in the root-lower *** resistance was positively correlated with the root area-lower and root length ***,the RSA of the different cotton cultivars varied greatly under ***,important root traits,such as the root-lower traits,provide great insights for exploring whether drought-tolerant cotton cultivars can effectively withstand adverse environment

关键词： cotton root system architecture drought stress cultivars variability root-lower

乳化剂及引发剂对碱溶性丙烯酸酯乳液合成的影响

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中国胶粘剂 2015年第8期24卷 5-8页

作者：王海霞汪存东高建舟中北大学化工与环境学院山西太原030051

采用种子乳液聚合法制备了丙烯酸酯乳液胶粘剂,考察了乳化剂、引发剂对碱溶性丙烯酸酯乳液性能的影响。研究结果表明:以十二烷基硫酸钠/烷基酚聚氧乙烯醚(SDS/OP-10)为阴/非离子型复合乳化剂,以过硫酸钾/亚硫酸氢钠(KPS/Na HSO3)为氧化... 详细信息

采用种子乳液聚合法制备了丙烯酸酯乳液胶粘剂,考察了乳化剂、引发剂对碱溶性丙烯酸酯乳液性能的影响。研究结果表明:以十二烷基硫酸钠/烷基酚聚氧乙烯醚(SDS/OP-10)为阴/非离子型复合乳化剂,以过硫酸钾/亚硫酸氢钠(KPS/Na HSO3)为氧化还原引发体系,当w(复合乳化剂)=6%和w(氧化还原引发剂)=0.8%(均相对于单体质量而言)、m(OP-10)∶m(SDS)=1∶2和m(KPS)∶m(Na HSO3)=2∶1时,乳液的综合性能相对最好。

关键词：碱溶性丙烯酸酯胶粘剂乳液聚合乳化剂

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二氧化钛/聚氨酯超疏水涂层的制备及性能

高分子材料科学与工程 2015年第5期31卷 62-65页

作者：潘洪波汪存东刘建新喻华兵中北大学化工与环境学院山西太原030051

以纳米二氧化钛(Ti O2)和有机硅改性聚氨酯为原料,乙酸乙酯为分散剂,通过简单的喷涂法,制备了Ti O2/PU微-纳米复合结构的超疏水涂层。涂层表面水的静态接触角为156°,滚动角为3°。经紫外光照射后,涂层表面变为超亲水表面,接触角为3°... 详细信息

以纳米二氧化钛(Ti O2)和有机硅改性聚氨酯为原料,乙酸乙酯为分散剂,通过简单的喷涂法,制备了Ti O2/PU微-纳米复合结构的超疏水涂层。涂层表面水的静态接触角为156°,滚动角为3°。经紫外光照射后,涂层表面变为超亲水表面,接触角为3°。用扫描电镜对涂层表面形貌进行了表征,研究了Ti O2与PU的质量比、光照时间对涂层表面润湿性转变的影响。结果表明,涂层表面与荷叶表面有相似的微-纳米结构,当Ti O2与PU的质量比在3∶5至4∶5之间,光照时间为3~4 h时,涂层表面润湿性转变明显。

关键词：二氧化钛润湿性聚氨酯超疏水超亲水

无稀释剂紫外光引发自交联丙烯酸酯压敏胶的研制

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中北大学学报（自然科学版） 2023年第5期44卷 555-560页

作者：关胜汪存东赵敏喻华兵中北大学化学与化工学院山西太原030051

为了克服紫外光固化丙烯酸酯压敏胶气味大和氧阻聚的不足,本文以单体丙烯酸正丁酯(n-BA)、丙烯酸异辛酯(2-EHA)、甲基丙烯酸缩水甘油酯(GMA)和功能单体丙烯酸(AA)、甲基丙烯酸羟乙酯(HE-MA)为原料,采用十二烷基硫醇(DDM)为链转移剂,以... 详细信息

为了克服紫外光固化丙烯酸酯压敏胶气味大和氧阻聚的不足,本文以单体丙烯酸正丁酯(n-BA)、丙烯酸异辛酯(2-EHA)、甲基丙烯酸缩水甘油酯(GMA)和功能单体丙烯酸(AA)、甲基丙烯酸羟乙酯(HE-MA)为原料,采用十二烷基硫醇(DDM)为链转移剂,以过氧化二苯甲酰(BPO)为引发剂进行自由基聚合,合成含环氧基团的丙烯酸酯预聚物。然后添加阳离子型紫外光引发剂6976,经涂布及紫外光光照引发得到自交联型环氧丙烯酸酯压敏胶。实验过程中分别测试了DDM、GMA和光引发剂用量等因素对压敏胶性能的影响。结果表明,DDM用量为0.26%,GMA用量为12.5%,光引发剂6976用量为2%时,所制的压敏胶综合性能最为理想。压敏胶的初粘力达到11.1N/25mm,剥离力达到14.6N/25mm,剪切强度达到9.2N/12×12mm^(2),在80℃下处理4h具有良好的耐热性,剥离时不掉胶。制备的压敏胶在低于50℃时易涂布,不含活性稀释剂,无刺激性气味,无氧阻聚,在工业上具有较好的应用前景。

关键词：环氧丙烯酸酯压敏胶紫外光固化自交联活性稀释剂

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二聚酸型聚酰胺热熔胶的合成及性能研究

中国胶粘剂 2015年第11期24卷 40-43页

作者：高建舟汪存东王海霞中北大学化工与环境学院山西太原030051

以哌嗪和低纯度的二聚酸为原料合成二聚酸型聚酰胺HMA(热熔胶),考察了哌嗪和二聚酸掺量等对该HMA性能的影响。采用红外光谱(FT-IR)法、差示扫描量热(DSC)法对HMA的结构、玻璃化转变温度(Tg)和软化点等进行了表征,并分析了不同样品的拉... 详细信息

以哌嗪和低纯度的二聚酸为原料合成二聚酸型聚酰胺HMA(热熔胶),考察了哌嗪和二聚酸掺量等对该HMA性能的影响。采用红外光谱(FT-IR)法、差示扫描量热(DSC)法对HMA的结构、玻璃化转变温度(Tg)和软化点等进行了表征,并分析了不同样品的拉伸强度和断裂伸长率等性能。研究结果表明:合成的产物是聚酰胺;随着哌嗪或二聚酸掺量的不断增加,HMA的Tg和软化点降低、拉伸强度下降,但断裂伸长率提高。

关键词：热熔胶聚酰胺哌嗪二聚酸