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基于家蚕平板丝结构的柔性压力传感器制备及其传感性能

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纺织学报 2024年第9期45卷 10-17页

作者：汪宇佳王怡王雅思代方银李智西南大学资源昆虫高效养殖与利用全国重点实验室重庆400715 西南大学蚕桑纺织与生物质科学学院重庆400715 西南大学重庆市生物质纤维材料与现代纺织工程技术研究中心重庆400715 西南大学农业部蚕桑生物学与遗传育种重点实验室重庆400715

为获得基于天然平板丝结构的柔性压力传感器,以家蚕平板丝为柔性基底,在家蚕吐丝过程中循环喷洒过渡金属碳化物/氮化物和银纳米线作为导电材料,制备出具有天然多层结构的导电传感层复合材料。借助扫描电子显微镜和傅里叶红外光谱仪对制... 详细信息

为获得基于天然平板丝结构的柔性压力传感器,以家蚕平板丝为柔性基底,在家蚕吐丝过程中循环喷洒过渡金属碳化物/氮化物和银纳米线作为导电材料,制备出具有天然多层结构的导电传感层复合材料。借助扫描电子显微镜和傅里叶红外光谱仪对制备的平板丝传感层进行形貌观察和结构分析,并通过优化传感层的层数开发出性能更优异的传感器。结果表明:具有2层传感层的传感器的灵敏度最高,在42.03~60.00 kPa的高压范围内灵敏度可达0.20 kPa^(-1),比仅有1层传感层的传感器灵敏度提高了20倍;该传感器响应/恢复时间均在1 s以内,且在施加不同压缩速率时仍能保持电流值稳定,可准确响应动态变化的压力,在超过1500次压力加载/卸载循环后传感性能依旧保持稳定;该传感器可很好地贴附到人体关节表面用于监测人体运动状态,通过按压时间长短来模拟摩斯密码,可用于信息加密传输和困境救援;将传感器制成传感阵列,可应用于压力位置轨迹追踪。

关键词：家蚕平板丝压力传感器智能可穿戴过渡金属碳化物/氮化物银纳米线

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“数字家蚕”共享分析平台上线

蚕学通讯 2024年第1期44卷 76-77页

作者：代方银国家蚕桑产业技术体系育种技术与方法岗位

2023年11月,国家蚕桑产业技术体系岗位科学家代方银教授团队正式上线“数字家蚕”共享分析平台(SilkMeta)。作为迄今涵盖数据类型最全、数据量最大的家蚕组学数据库,面向全球科学家开放。

关键词：数据类型共享分析产业技术体系组学数据家蚕上线数字

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蚕丝基柔性压力传感器的制备及其性能研究

丝绸 2024年第4期61卷 34-42页

作者：刘嘉琪汪宇佳王胜男代方银李智西南大学资源昆虫高效养殖与利用全国重点实验室重庆400715 西南大学蚕桑纺织与生物质科学学院重庆400715 西南大学重庆市生物质纤维材料与现代纺织工程技术研究中心重庆400715 西南大学农业农村部蚕桑生物学与遗传育种重点实验室重庆400715

蚕丝具有优异的生物相容性、可降解性和易加工性等,是应用于柔性电子领域的理想柔性基底材料。本文通过气液界面聚合法,在蚕丝织物、平板丝和静电纺丝素膜三种蚕丝材料表面实现聚苯胺的原位生长,成功制备出以聚苯胺为活性导电介质的柔... 详细信息

蚕丝具有优异的生物相容性、可降解性和易加工性等,是应用于柔性电子领域的理想柔性基底材料。本文通过气液界面聚合法,在蚕丝织物、平板丝和静电纺丝素膜三种蚕丝材料表面实现聚苯胺的原位生长,成功制备出以聚苯胺为活性导电介质的柔性基材,并将其组装成柔性压阻式压力传感器,这为开发高性能、安全可靠和轻质便携的可穿戴电子产品提供新的方法和途径。结果表明:三种蚕丝基柔性压力传感器中,蚕丝织物聚苯胺传感器具有最大的压力检测范围(16.27~504.79 kPa),拉伸变形可达20%,灵敏度仅为0.00129 kPa^(-1);静电纺丝素膜聚苯胺传感器灵敏度最高(0.01376 kPa^(-1)),但拉伸变形能力差,仅可拉伸2.3%;平板丝聚苯胺传感器压力检测灵敏度略高于蚕丝织物聚苯胺传感器,达到0.00134 kPa^(-1),线性检测范围为9.8~87.6 kPa。本文研究开发的蚕丝基柔性压力传感器在运动检测领域具有较好的应用前景。

关键词：蚕丝织物平板丝静电纺丝素膜聚苯胺气液界面结合柔性压力传感器

Resveratrol elongates the lifespan and improves antioxidant activity in the silkworm Bombyx mori

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Journal of Pharmaceutical Analysis 2021年第3期11卷 374-382页

作者： Jiangbo Song Lian Liu Kaige Hao Shuang Mao Yongxi Tang Xiaoling Tong fangyin dai State Key Laboratory of Silkworm Genome Biology Key Laboratory for Sericulture Biology and Genetic BreedingMinistry of Agriculture and Rural AffairsCollege of BiotechnologySouthwest UniversityNo.2 Tiansheng RoadBeibei DistrictChongqing400715China

A number of research has shown that the plant polyphenol resveratrol,one of the most prominent small molecules,has beneficial protective effects in multiple organisms,including worms,flies,and *** understand the effects of resveratrol on lifespan,we evaluated its effects in the silkworm Bombyx *** this study,we found that lifespan was significantly prolonged in both female and male silkworms treated with *** larval weight was significantly increased from day 3 of the 5th larval instar(L5D3)to day 7 of the 5th larval instar(L5D7).However,the weight of the pupa,cocoon,and total cocoon was not significantly different in female silkworms with resveratrol treatment than that in ***,resveratrol significantly improved the thermotolerance of the silkworms,which enhanced their survival ***,antioxidant activity was increased by resveratrol in both female and male ***,an antioxidant-related signalling pathway,SIRT7-FoxO-GST,was activated in silkworms with resveratrol ***,these results help us to understand the molecular pathways underlying resveratrol induced pro-longevity effects and indicate that silkworm is a promising animal model for evaluating the effects of lifespan-extending drugs.

关键词： Resveratrol Bombyx mori Lifespan Antioxidant activity SIRT7-FoxO-GST pathway

Growing Intact Membrane by Tuning Carbon Down to Ultrasmall 0.37 nm Microporous Structure for Confining Dissolution of Polysulfides Toward High-Performance Sodium–Sulfur Batteries

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Energy & Environmental Materials 2023年第4期6卷 147-156页

作者： Chao Wu Juan Li Lifei Liu Heng Zhang Zhuo Zou Wei Sun fangyin dai Changming Li State Key Laboratory of Silkworm Genome Biology College of SericultureTextile and Biomass SciencesSouthwest UniversityChongqing 400715China Institute of Materials Science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215011China School of Materials and Energy Southwest UniversityChongqing 400715China College of Chemistry and Chemical Engineering Hainan Normal UniversityHaikou 571158China

Room temperature sodium–sulfur(Na–S)batteries are severely hampered by dissolution of polysulfides into ***,a facile approach is used to tune a biomass-derived carbon down to an ultrasmall 0.37 nm microporous structure for the first time as a cathode in sodium–sulfur *** produced an intact uniform Na2S membrane to greatly confine the dissolution of polysulfides while realizing a direct solid phase conversion for complete reduction of sulfur to Na2S,which delivers a sulfur loading of 1 mg cm−2(50 wt.%),an excellent rate capacity(933 mAh g^(−1)@0.1 A g^(−1)and 410 mAh g^(−1)@2Ag^(−1)),long cycle performance(0.036%per cycle decay at 1 A g^(−1)after 1500 cycles),and a high energy density for 373 Wh kg^(−1)(0.1 A g^(−1))based on whole electrode weight(active sulfur loading+carbon),ranking the best among all reported plain carbon cathode-based room temperature sodium–sulfur batteries in terms of the cycle life and rate *** is proposed that the solid Na2S produced in the ultrasmall pores(0.37 nm)can be squeezed out to grow an intact membrane on the electrode surface covering the outlet of the pores and greatly depressing the dissolution effect of polysulfides for the long cycle *** work provides a green chemistry to recycle wastes for sustainable energies and sheds light on design of a unique pore structure to effectively block the dissolution of polysulfides for high-performance sodium–sulfur batteries.

关键词： carbon-sulfur composite cathode membrane pore size sodium-sulfur batteries

180mm×240mm矩形坯结晶器电磁搅拌参数优化研究

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甘肃冶金 2024年第2期46卷 75-78页

作者：张军卫代芳音孙明玮田鹏青岛特殊钢铁有限公司山东青岛266409

对180 mm×240 mm断面结晶器电磁搅拌器的磁力矩进行测量与分析,确定了该方型结晶器电磁搅拌的优选频率为3.5 Hz。在S45C钢种上进行3.5 Hz频率下不同电流强度下的结晶器电磁搅拌变参数试验。通过对中心碳偏析和铸坯特定位置夹杂物大小... 详细信息

对180 mm×240 mm断面结晶器电磁搅拌器的磁力矩进行测量与分析,确定了该方型结晶器电磁搅拌的优选频率为3.5 Hz。在S45C钢种上进行3.5 Hz频率下不同电流强度下的结晶器电磁搅拌变参数试验。通过对中心碳偏析和铸坯特定位置夹杂物大小数量的统计分析,确定了180 mm×240 mm方型结晶器电磁搅拌的优选参数为280 A、3.5 Hz,此参数状态下,可充分发挥结晶器电磁搅拌的优势,改善铸坯质量,同时还可避免较大夹杂物的卷入。

关键词：结晶器电磁搅拌电流强度偏析夹杂物数量

Single‑Atom Cobalt‑Based Electrochemical Biomimetic Uric Acid Sensor with Wide Linear Range and Ultralow Detection Limit

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Nano-Micro Letters 2021年第1期13卷 99-111页

作者： Fang Xin Hu Tao Hu Shihong Chen Dongping Wang Qianghai Rao Yuhang Liu fangyin dai Chunxian Guo Hong Bin Yang Chang Ming Li Institute of Materials Science and Devices Suzhou University of Science and TechnologySuzhou 215009People’s Republic of China Institute for Advanced Cross‑field Science and College of Life Science Qingdao UniversityQingdao 200671People’s Republic of China Institute for Clean Energy and Advanced Materials School of Materials and EnergySouthwest UniversityChongqing 400715People’s Republic of China School of Chemistry and Chemical Engineering Southwest UniversityChongqing 400715People’s Republic of China Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of SciencesSuzhou 215163People’s Republic of China State Key Laboratory of Silkworm Genome Biology College of BiotechnologySouthwest UniversityChongqing 400715People’s Republic of China

Uric acid(UA)detection is essential in diagnosis of arthritis,preeclampsia,renal disorder,and cardiovascular diseases,but it is very challenging to realize the required wide detection range and low detection *** present here a single-atom catalyst consisting of Co(Ⅱ)atoms coordinated by an average of 3.4 N atoms on an N-doped graphene matrix(A-Co-NG)to build an electrochemical biomimetic sensor for UA *** A-Co-NG sensor achieves a wide detection range over 0.4-41,950μM and an extremely low detection limit of 33.3±0.024 nM,which are much better than previously reported sensors based on various nanostructured ***,the A-Co-NG sensor also demonstrates its accurate serum diagnosis for UA for its practical *** of experimental and theoretical calculation discovers that the catalytic process of the A-Co-NG toward UA starts from the oxidation of Co species to form a Co^3+-OH-UA*,followed by the generation of Co^3+-OH+^*UA_H,eventually leading to N-H bond dissociation for the formation of oxidized UA molecule and reduction of oxidized Co^3+to Co^2+for the regenerated *** work provides a promising material to realize UA detection with wide detection range and low detection limit to meet the practical diagnosis requirements,and the proposed sensing mechanism sheds light on fundamental insights for guiding exploration of other biosensing processes.

关键词： Single-atom cobalt Nanozyme Biocatalysis Uric acid Molecular interaction

Erythrocyte membrane-camouflaged nanoworms with on-demand antibiotic release for eradicating biofilms using near-infrared irradiation

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Bioactive Materials 2021年第9期6卷 2956-2968页

作者： Luoxiao Ran Bitao Lu Haoyu Qiu Guofang Zhou Jing Jiang Enling Hu fangyin dai Guangqian Lan State Key Laboratory of Silkworm Genome Biology College of SericultureTextile and Biomass SciencesSouthwest UniversityChongqing400715China Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile Chongqing400715China Chongqing General Hospital University of Chinese Academy of Sciences No.118Xingguang AvenueLiangjiang New AreaChongqingChina

The increase in the number of resistant bacteria caused by the abuse of antibiotics and the emergence of biofilms significantly reduce the effectiveness of *** infections are detrimental to our life and *** reduce the abuse of antibiotics and treat biofilm-related bacterial infections,a biomimetic nano-antibacterial system,RBCM-NW-G namely,that controls the release of antibiotics through near infrared was *** hollow porous structure and the high surface activity of nanoworms are used to realize antibiotic loading,and then,biomimetics are applied with red blood cell membranes(RBCM).RBCM-NW-G,which retains the performance of RBCM,shows enhanced permeability and retention *** imaging in mice showed the effective accumulation of RBCM-NW-G at the site of *** addition,the biomimetic nanoparticles showed a longer blood circulation time and good ***-biofilm test results showed damage to biofilms due to a photothermal effect and a highly efficient antibacterial performance under the synergy of the photothermal effect,silver iron,and ***,by constructing a mouse infection model,the great potential of RBCM-NW-G in the treatment of in vivo infections was confirmed.

关键词： Red blood cell membrane Nanoworms Antibiotics release Bacterial infection

Gemini Dressing with Both Super‑hydrophilicity and ‑hydrophobicity Pursuing Isolation of Blood Cells for Hemostasis and Wound Healing

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Advanced Fiber Materials 2023年第4期5卷 1447-1466页

作者： Qing Li Enling Hu Kun Yu Ruiqi Xie Fei Lu Bitao Lu Rong Bao fangyin dai Guangqian Lan State Key Laboratory of Silkworm Genome Biology College of Sericulture Textile and Biomass ScienceSouthwest UniversityChongqing 400715China Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile Chongqing 400715China The Ninth People’s Hospital of Chongqing No.69 Jialing VillageBeiBei DistrictChongqing 400715China

Achieving efficient hemostasis and wound management is vital to preserve life and restore health in case of extensive hemor-rhagic skin ***,we develop a filter pump-like hierarchical porous-structure(HPS)dressing based on a non-woven substrate,konjac glucomannan(KGM)aerogel,and bi-functional microporous starch(BMS).The KGM aerogel intercalates into the non-woven network structure,forming a hydrophilic frame to stimulate the plasma permeation toward the interior in synergy with the hydrophilic pores of the *** BMS surface forms a hydrophobic matrix that fills the spaces of the KGM hydrophilic frame,contributing to the isolation and aggregation of blood cells on the surface of the HPS dressing to establish rapid *** model experiments suggest reliable HPS dressing hemostatic capacity,as it is able to stop ear artery and liver bleeding within 97.6±15.2 s and 67.8±5.4 s,***,the dressings exhibit antibacterial properties and enabled wound healing within 2 *** vitro hemolysis and cytotoxicity tests also confirm the biocompatibility of HPS *** novel“two-in-one”hemostatic dressing facilitates tissue repair of bleeding wounds over the entire recovery period,thereby providing a convenient strategy for wound management.

关键词： Hierarchical porous-structure Blood cell isolation Hemostasis Antibacterial activity Wound healing