Small
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2014
·Vol. 10
·期 13
·2595-2601
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IF 7.514
Jinyou Shao,Yucheng Ding,Wenjun Wang,Xuesong Mei,Haipeng Zhai,Hongmiao Tian,Xiangming Li,Bin Liu
Graphical A facile technique for the fabrication of fully-covering multiscale structures surfaces by nanoimprinting and modified laser swelling is presented. The approach is proved to be capable of generating regular and adjustable dome-like hierarchical structures, and it is used to create nature-inspired, multiscale functional surfaces with tunable wettability.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Foods
·
2023
·Vol. 12
·期 18
·3366
·
IF 5.2
Xinyue Liu,Zhuangzhuang Sun,Wenqing Zhao,Jiayu Zheng,Wei Liang,Wenhao Li
To explore the effect of amylose within starch granules on the efficiency of starch hydrolysis by acid, we chose the warm water extraction method to treat red adzuki bean starch to obtain different degrees of amylose removal granule models and to prepare samples in combination with acid hydrolysis. The amylose content was reduced after acid hydrolysis, reducing the peak viscosity (2599–1049 cP), while the solubility was significantly increased. In contrast, the short-chain content of the deamylose–acid hydrolysis samples was reduced considerably, exacerbating the trend towards reduced starch orderliness and increased solubility. This work reveals the granular structure of starch from the point of view of deamylose and contributes to a thorough understanding of the mechanisms of acid hydrolysis. It might add to knowledge in starch science research and industrial applications for the acid processing of starch-based foods, particularly with regard to the most important factors controlling the structure and function of starch.Keywords:deamylose;dual modification;red adzuki bean starch;multiscale structure
研究领域:
食品科学
·
淀粉化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Peng Lu,Yang Yang,Bin Luo,Chenchen Cai,Tao Liu,Song Zhang,Mingchao Chi,Tong Zhao,Jinlong Wang,Xiangjiang Meng,Yayu Bai,Yuzheng Shao,Guoli Du,Shuangfei Wang,Shuangxi Nie
Lightweight green polymer materials with exceptional toughness, high strength, and excellent ductility represent ideal candidates for enabling next-generation sustainable flexible electronics. However, the conflicting properties of material strength and toughness present a significant challenge in achieving an optimal combination of both attributes. In this study, a strong yet tough polymeric triboelectric material is prepared by constructing a multiscale reinforced network based on a nonsolvent-induced microphase separation strategy. The synergistic enhancement of strength and toughness is achieved by reinforcing non-covalent interactions within the polymer and constructing nanofibrous networks. The resulting triboelectric materials exhibited remarkable fracture toughness (78.6 MJ m −3 ), high tensile strength (42.5 MPa), an improvement in triboelectric output (71%), and promising recyclability. The integrated triboelectric wearable sensor maintained robust output signals. This study provides a novel solution for coordinating the conflicts between strength and toughness in heterogeneous polymer materials, showing significant potential in expanding their applications in flexible electronics and self-powered sensing technologies.
研究领域:
材料科学
·
柔性电子学
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Delong Kong,Hansheng Li,Yuzhi Gao,Lijuan He,Xuyang Ji,Fan Zhang,Wenjing Li,Hao Zhang
Thermal insulation nanomaterials based on aerogels have attracted more and more researchers’ attention due to their low thermal conductivity and lightweight characteristics. However, the high-temperature thermal insulation performance and the mechanical strength of the material itself remain a great challenge. We developed a method to construct multi-scale structures of thermal insulation materials based on dry aerogel particles, ultralong nanowires, and interfacial crosslinkers. In our work, the introduction of surfactants enabled the effective dispersion of aerogels and nanowires in the aqueous solution instead of in an organic solvent. Also, thanks to the synergistic effect of crosslinkers and nanowires, the materials exhibit a good mechanical strength; the maximum value of tensile strength for nanocomposite materials is up to 0.76 MPa. Aerogels with a resistance of 1000 °C and reflecting screens were adopted to prepare the multiple-layer thermal insulation materials, enabling the obtained material to show the outstanding thermal insulation property [0.028 W (m·K)−1 at 25 °C and 0.059 W (m·K)−1 at 800 °C]; additionally, when the temperature of the heating surface was raised to 800 °C, the back surface temperature of 15 mm materials increased to an ultimate temperature of only 218 °C after heat treatment for 500 s. These favorable multi-features indicate the materials are ideal for thermal insulation in industrial, aerospace, and even extreme environmental conditions.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Weili Shao,Shengli Zhu,Liang Zhu,Wanying Han,Hui Xu,Gaowei Nie,Shuaitong Liang,Rongwu Wang,Fan Liu
Effective particulate matter (PM) filtration in air has become a significant focus of scientific research due to the increased focus on environmental health and sustainable development. In this work, efficient nanofiber scale preparation technology is realized, based on our self-developed electrospinning equipment. Polyvinylidene fluoride/fluorinated polyurethane (PVDF/FPU) nanofiber composite membrane with multi-scale structure was designed and prepared, and successfully applied in the field of air filtration. PVDF/FPU ultrafine nanofibers with a diameter of 30 ± 5 nm were produced by employing high-conductivity dilute solution electrospinning. Subsequently, a PVDF/FPU composite nanofiber membrane material with a double-layer multiscale structure was constructed by adjusting the proportion and sequence of the spinning units of different scales. The results indicate that this double-layer, multiscale PVDF/FPU composite nanofiber membrane features a minute average pore size (0.36 μm), a high porosity rate (94.56 %), and outstanding hydrophobic properties (with a contact angle of 138.6°). This demonstrated exceptional filtration efficiency (99.98 %) and low filtration resistance (67 Pa) under test conditions of 32 L/min. After 10 wash cycles, the filtration efficiency remained above 99 %, indicating remarkable stability. Furthermore, the COMSOL simulation software was utilized to analyze the gradient filtration mechanism of the nanofiber membrane, which correlated well with the experimental results. The double-layer multiscale PVDF/FPU nanofiber composite membranes developed during this study offers a novel approach for creating highly efficient, low-resistance air-filtration materials.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Han-Ping Yu,Ying-Jie Zhu,Bing-Qiang Lu
Tooth enamel possesses excellent mechanical properties owing to its multi-scale highly ordered architecture. To develop tooth enamel-mimetic structural materials (EMSMs) is of great significance for understanding the important role of ordered hydroxyapatite (HAP) nanocrystals in tooth enamel and exploring high-performance materials. However, it is still a great challenge to mimic the unique multi-scale ordered architecture of the natural tooth enamel. Herein, inspired by the multi-scale structure and self-assembly of the tooth enamel, we have developed a novel bottom-up step-by-step assembly strategy to build the EMSMs based on ultralong HAP nanowires, and achieved the multi-scale (from nano- to micro- to macro-scale) highly ordered HAP nanowire structure control. In this work, ultralong HAP nanowires are assembled in sequence into highly ordered HAP nanowire bundles, aligned HAP microfibers, and three-dimensional (3-D) highly ordered HAP nanowire bulk, which perfectly imitate the structure and self-assembly of the tooth enamel. This novel method is suitable to fabricate the EMSMs with arbitrary sizes and well-designed shapes, which are promising for various applications in the biomedical fields such as hard tissue defect repair.
研究领域:
材料科学
·
生物医学工程
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Wenjie Zhang,Penghui Wang,Yi Hu,Qiang Chen,Bo Chi
Natural materials possess inherent multilength-scale structures, showcasing outstanding mechanical properties such as strain-stiffening, high damping, and shape-memory features under ambient conditions. Such integrated properties are highly desirable for advanced materials in biomedical devices and soft robots but remain challenging in synthetic materials. Herein, a novel strategy of sequential ion treatment is employed to introduce micro/nanoscale-ordered structures and molecular-scale stimulus responses into hydrogel-derived self-assembly fibers under ambient conditions. The treated fibers exhibit strain-stiffening properties with a high toughness of 257 MJ m −3 and 73% damping capacity comparable to spider silk. Owing to their cross-linking network and reversible secondary structure, those fibers exhibit outstanding water-stability, wet stretchability, and hydration-responsive shape-memory performance, with ultimate elongation of 407%, shape-fixity ratio of 94%, and shape-recovery rate of 97%. This work furthers the green fabrication of smart materials with multifunction and presents promising applications in diverse fields, including biomimetics and biomedicine.
研究领域:
材料科学
·
生物医学工程
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Gengmei Liu,Jinbao Li,Dingwen Yin,Huijuan Xiu,Simin Wang,Xuanchen Jiang,Yuxin Qin,Feiguo Hua,Yufei Jia,Mengxia Shen
With the rapid development of flexible and integrated electronics, there is an urgent need for electromagnetic shielding materials that meet the requirements of thinness, high electromagnetic interference shielding effectiveness (EMI SE), and low reflection loss (SE R ). This study designs an FL/CN composite film with an electric–magnetic bilayer multiscale structure, constructing an “absorption-reflection–absorption” electromagnetic wave dissipation path. First, spiky-ball-like Ni nanoparticles (NiNPs) were grown on cellulose nanofibers (CNF) via in situ reduction to form a magnetic layer (CN). This layer generates hysteresis and resonance losses while leveraging its multi-wall effect to induce polarization, multiple reflections, and scattering losses. Second, a multi-dimensional nanostructured FL conductive layer was fabricated using a mechanical blending method. The conductive network of silver nanowires (AgNWs) provides conductive loss, and the cocoa-tree-like SiO 2 @PDA structure forms a “resistor–capacitor” circuit to generate polarization loss, further attenuating and reflecting electromagnetic waves. Finally, the abundant heterogeneous interfaces in the macroscopic bilayer structure enhance electromagnetic wave dissipation. As a result, the composite film achieves an exceptional EMI SE of 85.59 dB with a low SE R of only 7.73 dB, alongside a tensile strength of 23.67 MPa. Additionally, the film exhibits excellent flexibility (bending radius < 6 mm), thermal management performance (thermal conductivity of 2.84 W/m·K), and strain sensing capabilities (response time of < 400 ms). This study provides a novel and scalable approach for developing flexible thin film EMI shielding materials with high shielding effectiveness and low reflection, demonstrating significant advantages over existing technologies in terms of efficiency, flexibility, and multifunctionality.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2017
·
IF 2.572
Zhibo Wei,Deyi Jiang,Jie Chen,Xiaogang Guo
In this study, we reported a new method to fabricate superhydrophobic Al films by combination of HCl/H 2 O 2 etching and electrophoretic deposition process. Through this two-step method, multi-scale hierarchical structures were successfully introduced on the surface. After hydrophobization, the resultant surface showed an excellent superhydrophobicity with a water contact angle of 169.6° and a sliding angle of ca. 1°. Furthermore, the surface exhibited excellent mechanical durability and could withstand abrasion tests under 8 kPa for 60 cm without losing superhydrophobicity. It also maintained superhydrophobicity when exposed to air or water for a long-term period. This work provides a cost efficient method to prepare mechanically robust and stable superhydrophobic Al alloy surface.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2020
·
IF 7.053
Hai He,Huawei Bian,Fengwei Xie,Ling Chen
This study compared the different effects of pectin (PE) and κ-carrageenan (CG) on the multilevel structures ( i.e. granule, crystallites, helices, fractals, and short-range order) and in vitro digestibility of extruded rice starch (MERS). The addition of either PE or CG altered the multiscale structures, increased the resistant component (RC) content, and reduced predicted glycemic index (pGI), with CG being more effective especially at a low content. CG led to the growth of molecular aggregates (α), single-helices, and V-type crystals ( X V ). PE resulted in higher contents of double-helices and A + B-type crystals ( X A+B ) and enhanced the short-range order ( R 1045/1022 ) and particle compactness. Pearson correlation analysis indicates that, for MERS/PE, the slowly-digestible component (SDC) and RC contents were influenced by different factors in the sequence of total crystallinity ( X Total ) > X A+B > X V > single-helix content > α > R 1045/1022 > double-helix content. For MERS/CG, the RC content was affected by X Total > single-helix content > X V .
研究领域:
食品科学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Mao Wenlong,Yao Zheng,Zhang Hua,Liao Huiyun,Li Jiang,Xue Dong,Yuan Guangxiang,Xu Baoming,Dou Kunpeng,Sheng Shijie,Xu Chao,Pang Junran,Tan Xiaoyan,Chi Bo,Xiong Dangan
On the basis of the relationship between the composition of the reconstituted cut stems and their functional positioning in the leaf formulation, this study improves the proportion of high-quality tobacco products by investigating the material basis of the effect of reconstituted cut stems on the quality of cigarette products, by characterizing the starch content, physicochemical properties, and characteristic structures of different components in tobacco products. The results showed that the starch content in reconstituted cut stems (4.93 ± 0.27%) was between high-quality tobacco leaves (4.48 ± 0.17%) and cut stems (5.13 ± 0.18%), indicating that the reduction of starch content during the processing of reconstituted cut stems is more conducive to the high-value treatment of reconstituted cut stems. At the same time, through the evaluation of the physico-chemical properties and multi-scale structural characteristics of starch particles, it was found that the starch of the reconstituted cut stems has a rock-like particle structure, and the short-range ordering on the surface increases, forming more ordered structural domains. In addition, the processed reconstituted cut stems increase the crystallinity of the starch. It also exhibits the typical B-type crystalline structure of starch, with stronger molecular chain interactions and high crystalline ordered arrangement. This study will provide technical guidance and theoretical support for improving the quality of reconstituted cut stems products, improving the bioavailability of tobacco products, reducing raw material costs, and effectively reducing the starch content of tobacco in the development of tobacco products.
研究领域:
植物学
·
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2024
·
IF 2.7
Xiaohua Li,Kunfeng Li,Huilong Shao,Shuang Zhao,Guobing Chen,Zhen Zhang,Zhicong Gan,Yilong Song,Zichun Yang
The freeze-casting is widely utilized as a tool for regulating micro-scale pore structures in the fabrication of flexible polyimide (PI) aerogels for applications in adsorption, filtration, and fire-retardant. Herein, a confinement-controlled freeze-casting method is developed to fabricate PI aerogels with excellent thermal insulation properties by designing multi-scale structural adaptability. In a confinement-controlled system, the enhanced solid/solid and solid/liquid interface interactions in the solution dispersion system induce dendritic evolution of ice crystals. Under the directional freezing, grown dendritic ice crystals squeeze the loaded particles to form polyamic acid salt (PAAs) cryogels. Followed by template removal and thermal imidization, PI aerogels with a micro/nano-scale slit-like porous structure were obtained. The PI aerogels are characterized by ultra-low density (as low as 9.82 mg/cm 3 ) and exceptional thermal insulation performance (25.0 mW/(m·K) at 25 °C).
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）