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Mechanically robust bamboo node and its hierarchically fibrous structural design

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National Science Review 2023年第2期10卷 199-211页

作者： si-ming chen si-Chao Zhang Huai-Ling Gao Quan Wang LiChuan Zhou Hao-Yu Zhao Xin-Yu Li ming Gong Xiao-Feng Pan chen Cui Ze-Yu Wang YongLiang Zhang HengAn Wu Shu-Hong Yu Department of Chemistry Institute of Biomimetic Materials & Chemistry Anhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale Institute of Energy Hefei Comprehensive National Science Center University of Science and Technology of China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsEngineering and Materials Science Experiment CenterUniversity of Science and Technology of China Institute of Innovative Materials (I2M) Department of Materials Science and EngineeringDepartment of Chemistry Southern University of Science and Technology

Although short bamboo nodes function in mechanical support and fluid exchange for bamboo survival,their structures are not fully understood compared to unidirectional fibrous ***,we identify the spatial heterostructure of the bamboo node via multiscale imaging strategies and investigate its me chanical properties by multimodal mechanical *** find three kinds of hierarchical fiber reinforcement schemes that originate from the bamboo node,including spatially tightened interlocking,triaxial interconnected scaffolding and isotropic *** reinforcement schemes,built on porous vascular bundles,microfibers and more-refined twist-aligned nanofibers,govern the structural stability of the bamboo via hierarchical *** addition,the spatial liquid transport associated with these multiscale fibers within the bamboo node is experimentally verified,which gives perceptible evidence for life-indispensable multidirectional fluid *** functional integration of mechanical reinforcement and liquid transport reflects the fact that the bamboo node has opted for elaborate structural optimization rather than ingredient *** study will advance our understanding of biological materials and provide insight into the design of fiber-reinforced structures and biomass utilization.

关键词： biological materials bamboo node hierarchical fiber structural reinforcement functional integration

Bioinspired hierarchical helical nanocomposite macrofibers based on bacterial cellulose nanofibers

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National Science Review 2020年第1期7卷 73-83页

作者： Huai-Ling Gao Ran Zhao chen Cui Yin-Bo Zhu si-ming chen Zhao Pan Yu-Feng Meng Shao-Meng Wen Chuang Liu Heng-An Wu Shu-Hong Yu Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS Department of Chemistry University of Science and Technology of China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics CAS Center for Excellence in Complex System Mechanics University of Science and Technology of China

Bio-sourced nanocellulosic materials are promising candidates for spinning high-performance sustainable macrofibers for advanced applications. Various strategies have been pursued to gain nanocellulose-based macrofibers with improved strength. However, nearly all of them have been achieved at the expense of their elongation and toughness. Inspired by the widely existed hierarchical helical and nanocomposite structural features in biosynthesized fibers exhibiting exceptional combinations of strength and toughness, we report a design strategy to make nanocellulose-based macrofibers with similar characteristics. By combining a facile wet-spinning process with a subsequent multiple wet-twisting procedure, we successfully obtain biomimetic hierarchical helical nanocomposite macrofibers based on bacterial cellulose nanofibers, realizing impressive improvement in their tensile strength, elongation and toughness simultaneously. The achievement certifies the validity of the bioinspired hierarchical helical and nanocomposite structural design proposed here. This bioinspired design strategy provides a potential platform for further optimizing or creating many more strong and tough nanocomposite fiber materials for diverse applications.

关键词： bioinspired nanocomposite hierarchical helical macrofibers strength and toughness bacterial cellulose

Bioinspired polysaccharide-based nanocomposite membranes with robust wet mechanical properties for guided bone regeneration

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National Science Review 2024年第3期11卷 215-226页

作者： Jian-Hong Xiao Zhen-Bang Zhang JiaHao Li si-ming chen Huai-Ling Gao YinXiu Liao Lu chen ZiShuo Wang YiFan Lu YuanZhen Hou HengAn Wu DuoHong Zou Shu-Hong Yu Department of Chemistry New Cornerstone Science Laboratory Institute of Biomimetic Materials&Chemistry Anhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Department of Dental Implant Center Stomatologic Hospital and College Key Laboratory of Oral Diseases Research of Anhui Province Anhui Medical University CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics CAS Center for Excellence in Complex System Mechanics University of Science and Technology of China Department of Oral Surgery College of Stomatology National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology Shanghai Research Institute of Stomatology Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Institute of Innovative Materials(I2M) Department of Chemistry Department of Materials Science and Engineering Southern University of Science and Technology

Polysaccharide-based membranes with excellent mechanical properties are highly desired. However, severe mechanical deterioration under wet conditions limits their biomedical applications. Here, inspired by the structural heterogeneity of strong yet hydrated biological materials, we propose a strategy based on heterogeneous crosslink-and-hydration（HCH） of a molecule/nano dual-scale network to fabricate polysaccharide-based nanocomposites with robust wet mechanical properties. The heterogeneity lies in that the crosslink-and-hydration occurs in the molecule-network while the stress-bearing nanofiber-network remains unaffected. As one demonstration, a membrane assembled by bacterial cellulose nanofiber-network and Ca2+-crosslinked and hydrated sodium alginate molecule-network is designed. Studies show that the crosslinked-and-hydrated molecule-network restricts water invasion and boosts stress transfer of the nanofiber-network by serving as interfibrous bridge. Overall, the molecule-network makes the membrane hydrated and flexible; the nanofiber-network as stress-bearing component provides strength and *** HCH dual-scale network featuring a cooperative effect stimulates the design of advanced biomaterials applied under wet conditions such as guided bone regeneration membranes.

关键词： bioinspiration heterogeneous crosslink-and-hydration dual-scale network nanocomposite membrane wet mechanical properties guided bone regeneration

A general aerosol-assisted biosynthesis of functional bulk nanocomposites

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National Science Review 2019年第1期6卷 64-73页

作者： Qing-Fang Guan Zi-Meng Han Tong-Tong Luo Huai-Bin Yang Hai-Wei Liang si-ming chen Guang-Sheng Wang Shu-Hong Yu Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Chemistry University of Science and Technology of China School of Chemistry and Environment Beihang University CAS Center for Excellence in Nanoscience Collaborative Innovation Center of Suzhou Nano Science and Technology Hefei Science CenterDepartment of Chemistry University of Science and Technology of ChinaHefei 230026 China3.School of Chemistry and EnvironmentBeihang University

Although a variety of nanoparticles with better-than-bulk material performances can be synthesized, it remains a challenge to scale the extraordinary properties of individual nanoscale units to the macroscopic level for bulk nanostructured materials. Here, we report a general and scalable biosynthesis strategy that involves simultaneous growth of cellulose nanofibrils through microbial fermentation and co-deposition of various kinds of nanoscale building blocks(NBBs) through aerosol feeding on solid culture substrates. We employ this biosynthesis strategy to assemble a wide range of NBBs into cellulose nanofibril-based bulk nanocomposites. In particular, the biosynthesized carbon nanotubes/bacterial cellulose nanocomposites that consist of integrated 3D cellulose nanofibril networks simultaneously achieve an extremely high mechanical strength and electrical conductivity, and thus exhibit outstanding performance as high-strength lightweight electromagnetic interference shielding materials. The biosynthesis approach represents a general and efficient strategy for large-scale production of functional bulk nanocomposites with enhanced performances for practical applications. Industrial-scale production of these bulk nanocomposite materials for practical applications can be expected in the near future.

关键词： bacterial cellulose nanoscale building blocks biosynthesis electromagnetic shielding scalable fabrication

Biomimetic twisted plywood structural materials

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National Science Review 2018年第5期5卷 703-714页

作者： si-ming chen Huai-Ling Gao Yin-Bo Zhu Hong-Bin Yao Li-Bo Mao Qi-Yun Song Jun Xia Zhao Pan Zhen He Heng-An Wu Shu-Hong Yu Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the MicroscaleCAS Center for Excellence in NanoscienceHefei Science Center of CASCollaborative Innovation Center of Suzhou Nano Science and TechnologyDepartment of ChemistryUniversity of Science and Technology of China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsCAS Center for Excellence in Complex System MechanicsUniversity of Science and Technology of ChinaHefei 230027China3 Anhui Key Laboratory of Condensed Matter Physics at Extreme ConditionsHigh Magnetic Field LaboratoryChinese Academy of Sciences CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsCAS Center for Excellence in Complex System MechanicsUniversity of Science and Technology of China Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryChinese Academy of Sciences

Biomimetic designs based on micro/nanoscale manipulation and scalable fabrication are expected to develop new-style strong, tough structural materials. Although the mimicking of nacre-like‘brick-and-mortar’ structure is well studied, many highly ordered natural architectures comprising 1D micro/nanoscale building blocks still elude imitation owing to the scarcity of efficient manipulation techniques for micro/nanostructural control in practical bulk counterparts. Herein, inspired by natural twisted plywood structures with fascinating damage tolerance, biomimetic bulk materials that closely resemble natural hierarchical structures and toughening mechanisms are successfully fabricated through a programmed and scalable bottom-up assembly strategy. By accurately engineering the arrangement of 1D mineral micro/nanofibers in biopolymer matrix on the multiscale, the resultant composites display optimal mechanical performance, superior to many natural, biomimetic and engineering materials. The design strategy allows for precise micro/nanostructural control at the macroscopic 3D level and can be easily extended to other materials systems, opening up an avenue for many more micro/nanofiber-based biomimetic designs.

关键词： biomimetic designs micro/nanoscale building blocks twisted plywood structures damage tolerance biomimetic bulk materials toughening mechanisms

Activating proper inflammation for wound-healing acceleration via mesoporous silica nanoparticle tissue adhesive

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Nano Research 2020年第2期13卷 373-379页

作者： Zhao Pan Kai-Run Zhang Huai-Ling Gao Yong Zhou Bei-Bei Yan Chi Yang Zhi-Yuan Zhang Liang Dong si-ming chen Rui Xu Duo-Hong Zou Shu-Hong Yu Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Center for Excellence in NanoscienceHefei Science Center of CASCollaborative Innovation Center of Suzhou Nano Science and Techology Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China Department of Oral Surgery Ninth People's HospitalShanghai Jjiao Tong University School of MedicineShanghai Key Laboratory of StomatologyNational Clinical Research Center of StomatologyShanghai 200011China Key Laboratory of Oral Diseases Research ofAnhui Province Stomatologic Hospital&CollgeAnhui Medical University Heifei 230032China

Efficient initiation and resolution of inflammation are crucial for wound ***,with using tissue adhesives for wound repair,patients occasionally suffered from delayed healing process because slow elimination of those exogenous adhesives generally leads to chronic *** the demand for minimal invasive therapy continues to rise,desire for adhesive materials that can effectively reconnect surgical gaps and promote wound regeneration becomes increasingly ***,by exploiting the inherent porous structure and performance of adhesion to tissue of mesoporous silica nanoparticles(MSNs),we demonstrate a tissue adhesive that can elicit acute inflammatory response and get eliminated after tissue *** formation of nanocomposites in wound gaps,the injured tissues can get reconnected *** resultant accelerated healing process verifty that the strategy of exploiting unique properties of nanomaterials can effectively promote inflammation resolution and wound *** design strategy will inspire more innovative tissue adhesives for clinical applications.

关键词： mesoporous nanoparticle tissue adhesive wound repair inflammation accelerated healing

Tunable attenuator based on polymer microstructured optical fibers

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Optoelectronics Letters 2007年第1期3卷 47-49页

作者： ZHANG Ye-jin HE Li-na JI Heng YANG si-gang chen ming XIE Shi-zhong Department of Electronics and Engineering Tsinghua University Beijing 100084 China

Based on polymer microstructured optical fibers (PMOF) and selective liquid crystal injection technology, a novel tem- perature control tunable attenuator is designed theoretically in this paper. In our experiments, PMMA microstructured optical fibers with high performance are drawn successfully and the selective injection of liquid crystal 5CB into micro- holes is realized. The tunable attenuator is fabricated with an extinction ratio of over 60dB, which agrees well with the design.

关键词：聚合物微结构光纤调谐衰减器选择性晶体注入

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Chromosome-scale assembly of the Kandelia obovata genome

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Horticulture Research 2020年第1期7卷 1823-1834页

作者： Min-Jie Hu Wei-Hong Sun Wen-Chieh Tsai Shuang Xiang Xing-Kai Lai De-Qiang chen Xue-Die Liu Yi-Fan Wang Yi-Xun Le si-ming chen Di-Yang Zhang Xia Yu Wen-Qi Hu Zhuang Zhou Yan-Qiong chen Shuang-Quan Zou Zhong-Jian Liu Key Laboratory of Humid Sub-tropical Eco-Geographical Processes of the Ministry of Education Fujian Normal UniversityFuzhou 350007China Fujian Colleges and Universities Engineering Research Institute of Conservation and Utilization of Natural Bioresources College of ForestryFujian Agriculture and Forestry UniversityFuzhou 350002China Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at the College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350002China Institute of Tropical Plant Sciences and Microbiology National Cheng Kung UniversityTainan 701China Administration of the Quanzhou Bay Estuary Wetland Nature Reserve Quanzhou 362000China Ocean College Minjiang UniversityFuzhou 350002China Henry Fok College of Biology and Agriculture Shaoguan UniversityShaoguan 512005China

The mangrove Kandelia obovata(Rhizophoraceae)is an important coastal shelterbelt and landscape tree distributed in tropical and subtropical areas across East Asia and Southeast ***,a chromosome-level reference genome of *** based on PacBio,Illumina,and Hi-C data is *** high-quality assembled genome size is 177.99 Mb,with a contig N50 value of 5.74 Mb.A large number of contracted gene families and a small number of expanded gene families,as well as a small number of repeated sequences,may account for the small *** *** found that *** experienced two whole-genome polyploidization events:one whole-genome duplication shared with other Rhizophoreae and one shared with most eudicots(γevent).We confidently annotated 19,138 protein-coding genes in *** and identified the MADS-box gene class and the RPW8 gene class,which might be related to flowering and resistance to powdery mildew in *** and Rhizophora apiculata,*** reference *** genome described here will be very useful for further molecular elucidation of various traits,the breeding of this coastal shelterbelt species,and evolutionary studies with related taxa.

关键词： breeding coastal landscape

Trans-base and trans-vault low-velocity penetrating brain injury:A retrospective comparative study of characteristics,treatment,and outcomes

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Chinese Journal of Traumatology 2021年第5期24卷 273-279页

作者： Yun Wu Tian-Ge chen si-ming chen Liang Zhou Meng Yuan Lei Wang Zi-Yuan Liu Chang-Long Bi Xiang-Ying Luo Song Lan Jin-Fang Liu Department of Neurosurgery Xiangya HospitalCentral South UniversityChangsha.410008China National Clinical Medical Research Center for Geriatric Diseases Xiangya HospitalCentral South UniversityChangsha410008China Center for Experimental Medicine Third Xiangya HospitalCentral South UniversityChangsha410013China Department of Anesthesiology Xiangya HospitalCentral South UniversityChangsha410008China

Low-velocity penetrating brain injury(LVPBI)caused by foreign bodies can pose life-threatening *** complexity and lack of validated classification data have prevented standardization of clinical *** aimed to compare the trans-base and trans-vault phenotypes of LVPBI to help provide guidance for clinical decision-making of such injury type.;A retrospective study on LVPBI patients managed at our institution from November 2013 to March 2020 was *** included LVPBI patients admitted for the first time for surgery,and excluded those with multiple injuries,gunshot wounds,pregnancy,severe blunt head trauma,*** were categorized into trans-base and trans-vault LVPBI groups based on the penetration *** patients were followed up by outpatient visit or *** data were entered into the Electronic Medical Record system by clinicians,and subsequently derived by *** demography and injury characteristics,treatment protocols,complications,and outcomes were analyzed and compared between the two groups.A t-test was used for analysis of normally distributed data,and a Mann-Whitney U test for non-parametric data.A generalized linear model was further established to determine whether the factors length of stay and performance scale score were influenced by each factor.;A total of 27 LVPBI patients were included in this analysis,comprised of 13(48.1%)trans-base cases and 14(51.9%)trans-vault *** analyses suggested that trans-base LVPBI was correlated with deeper wounds;while the trans-vault phenotype was correlated with injury by metal foreign *** was no difference in Glasgow Coma Scale score and the risk of intracranial hemorrhage between the two *** approaches in the trans-base LVPBI group included subfrontal(n=5,38.5%),subtemporal(n=5,38.5%),lateral fissure(n=2,15.4%),and distal lateral(n=1,7.7%).All patients in the trans-vault group underwent a brain convex approach using the

关键词： Head injuries,penetrating Low-velocity Trans-base Trans-vault Multiple comparison

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