CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Xiaofeng Pan,Qinhua Wang,Peng He,Kai Liu,Yonghao Ni,Lihui Chen,Xinhua Ouyang,Liulian Huang,Hongping Wang,Siying Xu
To completely mimic the tactile sensing of natural skin, flexible conductive hydrogels (CHs) have been assembled into bionic skin. However, most CHs cannot perfectly rebuild the feeling of human skin due to their highly linear structure. In addition, CHs are difficult to meet the super-stretchable, rapid self-healing properties at the same time. Here, we innovatively incorporated a proanthocyanins/reduced graphene oxide (PC/rGO) composite with a nerve-like nanonetwork into a glycerol-plasticized polyvinyl alcohol-borax (PVA-borax) hydrogel system to obtain a bionic tactile PC/rGO/PVA hydrogel-based electronic skin, which perfectly simulates the tactual sensation of human skin and integrates excellent stretchability (>5000%), compliance (1 mm), self-healing (3 s, 95.73%) ability for the first time. Due to its unique structure and mechanical properties, this electronic skin has remarkable wearable and strain-sensitive (GF = 14.14) properties, which can mimic and detect some real skin epidermis movements such as finger bending, facial expression changes, and throat vocalization. Interestingly, the hydrogel can also be used as an adhesive electrode for the accurate detection of electrocardiograph (ECG) and electromyography (EMG) signals. More importantly, this work provides a new route in mimicking the natural skin’s tactile ability through a hierarchical design of hydrogel networks.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2019
·Vol. 43
·期 13
·5032-5038
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IF 3.069
Yihan Sun,Jinxia Huang,Siyang Zhao,Zhiguang Guo
Herein, a simple, facile and versatile protocol was presented to fabricate water-resistant fabrics based on an in situ bio-silicification strategy and fluorinate-free modification. The whole fabrication procedure is green and avoids the need for any fluorinate-containing compounds, environmentally harmful organic solvents and high preparation temperature. The produced fabrics maintained robust lyophobic properties after multiple machine laundry cycles, repeated abrasion cycles, UV irradiation, and organic solvent and strong acid/base attacks. The obtained superhydrophobic fabrics exhibited repeatable self-repairing behaviour against repeated washing and oxygen plasma etching cycles. Our in situ biomimetic silicification strategy for developing robust self-repairing superhydrophobic fabrics using a waterborne fluorinate-free coating system well fits the motifs of green chemistry and will lead to the development of green preparation of other superwetting surfaces.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Shuxin Wei,Huiyu Qiu,Huihui Shi,Wei Lu,Hao Liu,Huizhen Yan,Dachuan Zhang,Jiawei Zhang,Patrick Theato,Yen Wei,Tao Chen
The active color-changing ability of many living species has inspired scientists to replicate the optical property into soft wet and tissue-like hydrogel materials. However, the color-changing processes of most reported examples are controlled by the traditional stimuli (e.g., pH, temperature, and ions), which may suffer from the residual chemical product accumulation, and have difficulty in achieving local control and integration into the commercial robots, especially when applied as biomimetic skins. Herein, inspired by the nervous (bioelectricity) control of skin color change in cephalopods, we present an electrically powered multicolor fluorescent hydrogel system with asymmetric configuration that couples thermoresponsive fluorescent hydrogel with stacked graphene assembly (SGA)-based conductive paper through luminous paint as the middle layer. Owing to the highly controllable electrical stimulus in terms of amplitude and duration, the Joule heat supplied by SGA film can be regulated locally and in real time, leading to precise and local emission color control at low voltage. It also avoids the addition of any chemicals. Furthermore, the electrically powered color-changing hydrogel system can be conveniently integrated into the commercial robots as biomimetic skins that help them achieve desirable camouflage, display, or alarming functions.
研究领域:
材料科学
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生物医学工程
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仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
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2019
·Vol. 11
·期 11
·1892
·
IF 3.164
Luhao Wang,Bin Luo,Danni Wu,Yi Liu,Li Li,Hongguang Liu
Intelligent responsive materials have become one of the most exciting fields in the research of new materials in the past few decades due to their practical and potential applications in aerospace, biomedicine, textile, electronics, and other relative fields. Here, a novel thermal-responsive biomimetic shape memory wood composite is fabricated utilizing polycaprolactone-based (PCL) shape-memory polymer to modify treated-wood. The shape memory wood inherits visual characteristics and the unique three-dimension structure of natural wood that endows the shape memory wood (SMW) with outstanding tensile strength (10.68 MPa) at room temperature. In terms of shape memory performance, the shape recovery ratio is affected by multiple factors including environment temperature, first figuration angle, cycle times, and shows different variation tendency, respectively. Compared with shape recovery ratio, the shape fixity ratio (96%) is relatively high and stable. This study supplies more possibilities for the functional applications of wood, such as biomimetic architecture, self-healing wood veneering, and intelligent furniture.Keywords:shape memory wood;thermal-response;biomimetic materials;interface bonding
研究领域:
材料科学
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仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Na Wang,Xiang Zhou,Youming Dong,Ying Zhang,Rong Liu,Haijiao Kang,Kaili Wang,Jianzhang Li
Natural mildew preventives, like citral, have great potential to protect bamboo from mildew, while their long-lasting antimildew performance is yet to be challenged owing to their oxidability and volatility. Inspired by biomimetic mineralization, in this work, citral@ZIF-67 particles were synthesized by encapsulating citral into a zeolite imidazolate framework-67 (ZIF-67) cage and introduced into a bamboo structure. Benefiting from the unique cage structure and large surface area of ZIF-67, it can encapsulate sufficient citral molecules. The encapsulation reduced the particle size of ZIF-67 due to the nucleation of citral. Furthermore, the surface area, pore size, and volume of citral@ZIF-67 particles gradually decreased with the increase in loading amounts of citral. ZIF-67 exhibited a certain antibacterial ability against E. coli and S. aureus. The encapsulation of citral can further enhance the antibacterial activity of ZIF-67. In addition, the citral@ZIF-67 showed slow-release performance that followed the Fickian diffusion mechanism. After the citral@ZIF-67 treatment, bamboo showed no mold spots on the surface with an infection grade of 0, which was retained, even though bamboo was conditioned at 50 °C and 85% relative humidity for 10 days. This proposed method can effectively improve the stability of natural mildew preventives and endow bamboo with long-term antimildew properties with low cost and minimized environmental impacts.
研究领域:
材料科学
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生物学
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林业科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2017
·
IF 4.164
Longgang Wang,Yanshuai Cui,Shengfu Chen,Guangzhi Wang,Dawei Gao,Yanping Liu,Qiaoyue Luo,Zhiwei Liu,Xuwu Zhang
The dendrimer based synthetic mimetic enzyme has been drawing great attention. However, this mimetic enzyme is different from the natural enzymes, which are pH sensitive, biocompatible and keep their catalytic activity in biological complex medium. A single zwitterionic layer composed by primary amine and carboxyl groups may be a useful method to obtain these properties. Herein, we report a novel facile method to prepare a mimetic enzyme. The complexes of generation 5 poly(amido amine) dendrimers (G5 PAMAM) with free hemin (G5Hs) were modified by the maleic anhydride and cysteamine. Results showed that the mimetic enzymes (G5HMCs) had pH sensitivity and good stability by varying the pH from 4 to 9, while significant precipitation was observed for free hemin at pH 5 after two days. The G5HMC (3:1) showed optimal catalytic activity at its isoelectric point. Furthermore, G5HMCs displayed excellent biocompatibility. The G5HMCs incubated with fibrinogen were stable for 24 h, while G5Hs immediately formed large aggregates. G5HMC (3:1 2 mg/mL) displayed little cytotoxicity with HeLa cells or A549 cells for 24 h, while G5H (3:1) had serious cytotoxicity, which was also demonstrated by cell morphology observation. At last, G5HMCs fully preserved their catalytic activity in bovine serum albumin (BSA) solution compared with phosphate buffer saline (PBS) solution, while hemin decreased to 73.5–81.5% catalytic activity in BSA solution, which was caused by the less interaction with BSA for G5HMCs than free hemin. The surface functionalization schemes described in this report would represent a versatile method to prepare water-soluble, pH sensitive, biocompatible, and efficient artificial enzymes for biomedical related applications.
研究领域:
生物化学
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纳米医学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Liwei Zhao,Ming Gong,Jian Yang,Jinlou Gu
The construction of a biomimetic ionic channel is of great significance for the fabrication of smart biodevices or logic circuit. Inspired by the selective permeability of the cell membrane toward bioions, a light-induced and pH-modulated artificial nanochannel is herein prepared by integrating the multistimuli-response molecule of carboxylated spiropyran (SP-COOH) into the frameworks of NU-1000 (Zr-based MOFs defined by Northwestern University). The loading density of the SP-COOH could reach as high as 7 wt % while keeping unchanged crystallinity and high porosity. Thanks to the precise matching of pore size of NU-1000 and molecular dimensions of SP-COOH, the loaded molecules could proceed free and reversible for isomerization between the hydrophilic and hydrophobic states. The ion-switchable characteristics of the channel are implemented by the amphiphilic change of the light-controlled gate molecule. Additionally, in the hydrophilic state, the channel presents reversible affinity toward cations or anions due to the reverse charge state induced by pH, thus constructing a pH-controlled subgate. Taking [Ru(NH3)6]3+ and [Fe(NH3)]3– as the model cation and anion, their redox peak currents occur as reversible change under different signal combinations of light and pH. Moreover, in accordance with the ionic selective permeability, several logic circuits/devices are designed to display the relationships between exogenous stimuli and ionic transportations in a computer language, prefiguring their wide application prospects in electronic devices and life sciences.
研究领域:
材料科学
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生物医学工程
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2020
·
IF 6.182
Liman Zhao,Rongrong Chen,Liangjie Lou,Xiaoyan Jing,Qi Liu,Jingyuan Liu,Jing Yu,Peili Liu,Jun Wang
Marine biofouling is an important obstacle to the development of marine resources. Problems such as huge economic losses caused by biofouling and environmental damage caused by toxic antifouling agents have not been resolved. Therefore, it is of great significance to develop a novel, environmentally friendly antifouling (AF) materials. However, in the marine environment, Laminaria japonica still has excellent antifouling ability in a relatively static state compared to those parade creatures. Inspired by this, this study reports a synergistic effect between surface topography and chemical modification to inhibit marine biofouling. Firstly, the surface of the Laminaria japonica was analyzed and its morphology was reproduced using a simple moulding process. Additionally, the polyelectrolyte layer composed of sodium alginate and (guanidine-hexamethylenediamine-PEI) (poly(GHPEI)) was chemically modified on the isotropic microstructure surface of PDMS replicas by layer-by-layer assembly method. The anti-adhesion ability of the biomimetic material was tested with Nitzschia closterium ( N. closterium ) (9 ± 5 diatoms mm −2 of N. closterium adhered). Meanwhile, the antifouling performance of the modified films were evaluated by Escherichia coli ( E. coli ), and its antibacterial ability were as high as 96.2 ± 1.3%. The combination of microtopography and (GHPEI/ALG) * n films endow the coating with excellent antifouling ability.
研究领域:
海洋生物学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Mingtian Xu,Zhengjie Xu,Zhijun Jiang,Wenwen Shao,Lihao Zhang,Yufei Chen,Zhixia Dong,Cihui Liu,Weixing Zhang,Xinjian Wan
Biliary stents (BS) play an important role in the field of modern interventional therapy. However, the surface of BS is easy to cause microbial attachment, which causes serious postoperative infections and threatens the life safety of patients. Here, inspired by the microstructures of Nepenthes alata ’s peristome surface and Morpho menelaus , we presented an excellent slippery surface for BS tips by employing inverse opal colloidal crystals hydrogels. The inverse opal structure not only imparts a tunable structural color to the slippery surface but provides sufficient room for liquid absorption, such as lubricants and drugs. The slippery liquid-infused porous surfaces (SLIPS) endow the slippery surface with anti-adhesion and antibacterial properties. Due to the good temperature sensitivity of hydrogels, we can control the drug release by changing the temperature. In particular, the drug release process can be monitored through visually structural color variations. Furthermore, we also proposed a mechanism of droplet infiltration on SLIPS under the heating which is expected to be used for the smart transport of droplets. The multifunctional SLIPS BS tips also exhibit good generalization, we believe it will bring more possibilities for biliary stents.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Lihua Wu,Yue Luo,Chaofeng Wang,Shuilin Wu,Yufeng Zheng,Zhaoyang Li,Zhenduo Cui,Yanqin Liang,Shengli Zhu,Jie Shen,Xiangmei Liu
In this work, a biomimetic nanozyme catalyst with rapid and efficient self-bacteria-killing and wound-healing performances was synthesized. Through an in situ reduction reaction, a PCN-222 metal organic framework (MOF) was doped with bismuth nanoparticles (Bi NPs) to form Bi-PCN-222, an interfacial Schottky heterojunction biomimetic nanozyme catalyst, which can kill 99.9% of Staphylococcus aureus (S. aureus). The underlying mechanism was that Bi NP doping can endow Bi-PCN-222 MOF with self-driven charge transfer through the Schottky interface and the capability of oxidase-like and peroxidase-like activity, because a large number of free electrons can be captured by surrounding oxygen species to produce radical oxygen species (ROS). Furthermore, once bacteria contact Bi-PCN-222 in a physiological environment, its appropriate redox potential can trigger electron transfer through the electron transport pathway in bacterial membranes and then the interior of the bacteria, which disturbs the bacterial respiration process and subsequent metabolism. Additionally, Bi-PCN-222 can also accelerate tissue regeneration by upregulating fibroblast proliferation and angiogenesis genes (bFGF, VEGF, and HIF-1α), thereby promoting wound healing. This biomimetic enzyme-catalyzed strategy will bring enlightenment to the design of self-bacterial agents for efficient disinfection and tissue reconstruction simultaneously.
研究领域:
生物材料学
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医学
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Jianhui Li,Qihang Wang,Zhengyi Fu,Zhaoyong Zou
Biomimetic mineralization can facilitate the fabrication of materials with intricate hierarchical structures and distinctive functional properties under ambient conditions. However, precise replication of the complex biomineralization process in vitro remains a big challenge. In this study, aimed at mimicking the biomineralization process of calcite prismatic layers of mollusk shells, a peristaltic pump was employed to slowly transport a sodium carbonate solution into a calcium-containing solution in the presence of poly(acrylic acid) (PAA). Through delicate control of the ion transport rate and reaction conditions, a calcite seed layer was first deposited on the chitosan-coated substrate, followed by the fabrication of a continuous, dense, and highly oriented shell-like calcite prismatic structure. The influences of PAA concentration and ion transportation rate on the growth kinetics and morphology of calcite were studied, showing that optimal conditions are required to form the prismatic structure. It was demonstrated that the prismatic structure started from random formation of an individual spherical disk on the seed layer, which grew larger in diameter and fused with adjacent disks. Furthermore, using confocal Raman mapping analysis, the orientation of calcite crystals at different growth stages was revealed. This study provides a novel bioprocessing-inspired strategy to fabricate a uniform calcite prismatic structure and significantly improves our understanding of the growth mechanisms.
研究领域:
材料科学
·
生物矿化
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2024
·
IF 9.8
Kaiyi Dong,Meng Wei,Qian Zhou,Bingfang He,Bingbing Gao
Rapid humidity response contributes tremendously to visually flexible wearables. However, sluggish response, infrequent reproducibility, and biotoxicity restrict the development of wearable humidity response devices. Here, inspired by the changes in the color of Dynastes hercules , a flexible wearable, rapid response, stretchable, rewritable meta-silk fibroin diffractive film (mSFD) is presented. The film is generated by spin-coating silk protein and polyurethane (PU) cross-linking, followed by hot pressing of meta-structures. Owing to the diffraction and stable combination of the SF β -structure and PU hydrogen bond, mSFDs exhibit excellent coloration, rapid response, and erasability. Notably, the microcolumns and microporous structures on the meta-membrane endow the membrane with unparalleled rapid response features. Fast color disappearance and reappearance are observed under high humidity conditions (response time <2 ms, cycle in 1 s). In particular, the rapid humidity responsiveness of mSFP induces a change in the color of the membrane, which enables its application in real-time biomonitoring (wound management, mask regulation) and anticounterfeiting (medicine storage, fingerprint recognition). These properties endow bioinspired mSFD P with high potential in the field of robotic skin.
研究领域:
材料科学
·
生物医学工程
✓ 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）