International Journal of Bioprinting
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2022
·
IF 7.422
Lanlan Dong,Zhengzhe Han,Xiang Li
Hydrogels have become an attractive option for tissue repair. A novel multifunctional hydrogel was developed using a two-step method involving photopolymerization and tannic acid (TA) solution incubation. The mechanical properties of this hydrogel were enhanced by the multi-hydrogen bond interaction between the TA and N-acryloyl glycinamide/gelatin methacrylate (NAGA/GelMA). The compressive modulus was doubled. The compressive strengths of the hydrogel were 5.5 MPa. The swelling rate was reduced by a factor of three. The adhesion strength of the composite hydrogel reached 80 KPa. The TA-mediated NAGA/GelMA/Laponite composite hydrogel exhibited excellent anti-fatigue and anti-oxidation properties, as well as printability. In vitro experiments indicated that the TA-mediated hydrogel facilitated the proliferation of bone marrow mesenchymal stem cells and osteogenic and chondrogenic differentiation. The developed multifunctional composite hydrogel has great potential for osteochondral defect repair under osteoarthritis conditions.
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高影响因子
E-POLYMERS
·
2022
·Vol. 22
·期 1
·696-704
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IF 3.074
Si Zhang,Zhengjin Xiong,Jian Zhang,Xueting Zhang,Yuhang Chen,Yun Chen
The polymer with imine bonds (C═N) synthesized by condensation of aldehydes and amines was called polyimine. Graphene nanoplatelets (GNPs) were blended into polyimine by imine dynamic chemistry, and GNPs/polyimine (GNPs-P) composites were fabricated by heat-pressing. A series of thermal and mechanical properties have been tested for the matrix and GNPs-P composites. Thermogravimetric analyzer showed that the GNPs were able to improve the thermal stability of the GNPs-P composites. From the test of mechanical properties, GNPs-P composite with 0.5 wt% GNPs was superior to the matrix in bending and tensile properties. The bending and tensile strengths were 92.65 and 73.05 MPa, with an improvement of 18% and 5%. GNPs-P composites with 1 wt% GNPs showed the most significant advancement in impact properties, reaching an impact strength of 11.745 kJ·m −2 with a gain of 21.6%. Cross-sectional observations using scanning electron microscope proved that the GNPs-P composites have brittle fractures. A small number of GNPs could synergize with the matrix by bridging the cracks, creating a crack diffusion resistance and a load transfer reinforcement effect, which improved the mechanical properties of the GNPs-P composites.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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2022
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IF 6.044
Tao Xiang,Peng Du,Weizong Bao,Zeyun Cai,Kun Li,Guoqiang Xie
Grain refinement is perfectly efficient for improving strength , but accompanies by a dramatic loss of ductility. Here we report a bimodal grain size structure design by inducing ultra-high strength TiZrNbTa high entropy alloy (HEA) with nanoscale grain size into pure Ti with coarse grain size to achieve the strength-strain balance by establishing bimodal grain size distribution (BGSD). Through optimizing the TiZrNbTa HEA content, the 60 wt.% TiZrNbTa/Ti titanium matrix composite (TMC) exhibits a yield strength of 1426 ± 30 MPa, ultimate compressive strength of 2133 ± 88 MPa, and an acceptable compressive strain of 22.3% ± 1.8%, respectively. The compressive yield strength of 60 wt.% TiZrNbTa/Ti TMC is 3.6-fold for c.p. Ti (393.0 ± 7.1 MPa). The unusual high strength is attributed to the nanoscale grain size provided by TiZrNbTa HEA, and the acceptable compressive strain is obtained from the co-effect of coarse grain Ti and TiZrNbTa HEA. The excellent mechanical properties of 60 wt.% TiZrNbTa/Ti TMC undoubtedly greatly increase the possibility of its application as an orthopedic implant in the biomedical field.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Bin-Bin Chen,Shuai Chang,Lei Jiang,Jian Lv,Ya-Ting Gao,Yue Wang,Ruo-Can Qian,Da-Wei Li,Mahmoud Elsayed Hafez
Carbon dots (CDs), as new type of carbon-based nanoparticles, are considered to be an aggregate with irreversible polymerization. Achieving the reversible tunability of CDs luminescence based on their reversible polymerization is a challenging subject. Herein, we, for the first time, design and construct the blue-emitting CDs with reversible polymerization by a room-temperature Schiff base reaction between tannic acid and ethylenediamine. The formation of CDs is proven to be due to the crosslinking polymerization of precursors caused by imine bond. As a dynamic covalent bond, imine bond endows CDs with controllable structural transformation properties, and the prepared CDs can be depolymerized and polymerized reversibly by pH-controlled imine bond cleavage and re-formation. These properties of reversible fluorescence photoswitching make the CDs have a good application prospect in reversible information encryption.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Song Meng,Zhihao Yao,Jiawei Liu,Erjing Wang,Cao Li,Bingbing Jiang,Ziqiang Xu
Since the excess exposure to F - may induce serious issues to human health, the effective adsorption and sensitive detection of F - is essential. Therefore, carbon dots (CDs) capped CeO 2 (CeO 2 @CDs) was synthesized via hydrothermal treatment of tannic acid and CeCl 3 . Due to abundant phenolic hydroxyl are reserved and excellent hydrophilicity, CeO 2 @CDs possess high F - adsorption capacity. The partition coefficient parameters (PC) are determined to be 2.65 L/g, which is comparable with previous work. The kinetics results and adsorption isotherm are consistent with pseudo-second-order model and Freundlich model, respectively, indicating the chemisorption dominate the adsorption, mainly via the ion exchange between hydroxyl and F - . Since phenolic hydroxyl existed on the CeO 2 @CDs, synergetic effect of CDs and CeO 2 contribute to superior ROS eliminating capacity, even at acidic conditions. Moreover, due to the ROS scavenging of CeO 2 @CDs abilities can be potentiated by F - , colorimetric detection of F - can be realized via horseradish peroxidase as an indicator. The linear range is 0.3–2.1 mM with limit of detection is 0.13 mg/L. The current results imply that CeO 2 @CDs possess potential in both efficient removal and sensitive detection of F - related contamination issues and elucidation of development to address other anions related issues.
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INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2022
·Vol. 57
·期 8
·5228-5238
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IF 3.612
Shuya Wang,Bin Zhou,Xinquan Yang,Liqiong Niu,Shugang Li
Summary Clanis Bilineata Tingtauica Mell Protein (CBTMP) was one of the new natural insect protein resources. However, due to its strong surface hydrophobicity and poor emulsion stability, its application has greatly been limited. In this study, Pickering emulsions were prepared by CBTMP–Tannic acid (CBTMP–TA) particles and soybean oil ( φ = 50%). The presence of TA significantly increased the zeta-potential (from −23.5 ± 0.73 to −29.23 ± 0.58 mV) and three-phase contact angle (from 129.9 ± 4.53° to 87.27 ± 3.20°) of complex, especially the concentration of TA was 0.4 m m . Besides, the stability of emulsions was significantly improved according to the results of the droplet size and static multiple light scattering. Furthermore, rheological properties including viscosity, thixotropy and creep recovery were significantly enhanced, which indicated the formation of a more stable network structure. Interfacial behaviour (Interfacial tension, interfacial film viscoelasticity and diffusion rate) of emulsions was significantly changed, forming a more stable interfacial layer as TA content increased. The CBTMP–TA complex was adsorbed at the interface and the adsorption rate was also mainly affected by the content of TA. The study indicated CBTMP–TA compositions to enhance stability, rheological behaviours and interfacial characteristics, and demonstrated the potential applications of insect protein resources in food emulsion systems.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
·
IF 8.025
Yiwei Zhan,Yacheng Xing,Quan Ji,Xiaomei Ma,Yanzhi Xia
To construct conductive hydrogels with a conductive and a non- or weakly conductive layer for comfortable and safe electronic application, marine biobased anionic polysaccharide sodium alginate (SA) and neutral polyvinyl alcohol (PVA) were employed as the hydrogel matrixes. Tannic acid (TA) was exploited to mediate the demixing of the miscible aqueous solution of SA and PVA in view of the much larger interaction strength of TA with PVA than both of TA with SA and PVA with SA calculated from the density functional theory (−40.21, −29.77 and −21.00 kcal·mol −1 respectively). The finally-fabricated alginate/PVA composite hydrogels not only possess a “Janus” hierarchy but manifest asymmetrical conductivity, i.e., one layer strongly conductive and another weakly conductive. The strongly conductive layer achieves a conductivity of more than 2.95 S·m −1 , facilitating their application in soft electronic areas like human-machine interfaces, smart wearable devices and soft robots. The weakly conductive layer with the conductivity less than 0.60 S·m −1 and the thickness adjustable, constitutes a protective screen for another layer. The Janus hydrogels exhibit good mechanical performance, excellent strain-sensing performance and fatigue-resistant mechanics, conductivity and sensitivity.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiang Ke,Shuxian Tang,Zhiyun Dong,Kai Ren,Peng Yu,Xinyuan Xu,Jiaojiao Yang,Jun Luo,Jianshu Li
Development of supramolecular adhesion systems from small molecules is a promising strategy to construct adhesives integrating synthetic simplification and sophisticated properties. Here, we report a facile and green one-pot strategy for fabricating a solvent-free and dynamic supramolecular adhesive via co-heating three readily available feedstocks, a natural small biological molecule (α-lipoic acid), a natural plant polyphenol (tannic acid), and ferric chloride. The adhesive is injectable and self-healing, which can work instantly and repeatedly on various materials (e.g., polytetrafluoroethylene (PTFE)) in diverse conditions (dry, underwater, pH < 7, various ionic environments, and even in vacuum) at room temperature, showing promising applicability in complex environments. The self-strengthening of the supramolecular network with time further improves the adhesion strength of the adhesive for the glass (from about 22 kPa to exceeded 300 kPa after 28 d). More importantly, the adhesive exhibits great potentials to be applied in biomedical fields with wet environments. This ready-to-use and high-performance supramolecular adhesive, constructed by natural small molecules via an extremely facile preparation method, represents a promising universal strategy for both dry and wet adhesion.
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2022
·Vol. 62
·期 7
·2131-2142
·
IF 2.573
Huanmin Wang,Xiaoming Guo,Cunbao Pei,Wei Dong,Yongyi Yao
Membrane separation technology has played an enormous role in water treatment. However, the surface of the separation membrane has low wettability, and it is easy to cohere with oil droplets during the oil–water separation process, which affects the efficiency of water treatment. To improve its separation property, this article reports the continuous deposition of tannic acid (TA)-titanium (Ti IV ) complex interconnected networks with high adhesion and long-term stability on the surface of polypropylene (PP) membranes to achieve oil–water separation. The hydrophilic TA-Ti nanostructured coating shows high adhesion and long-term stability on non-polar surfaces of the PP membrane. Notably, after modification, the membrane can be used to separate hexadecane-in-water emulsions under gravity force, with a separation efficiency of over 99% and a water flux of 227 Lm −2 h −1 . Compared with some membranes modified with polyphenols, this easy-to-prepare TA-Ti@PP membrane can achieve better separation performance with only gravity actuation. Furthermore, the modified membrane has superior reusability and excellent chemical stability (salt/acid/alkali resistance), and it has great potential in the field of oil-in-water and wastewater treatment.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Jin-Bo Cheng,Hai-Bo Zhao,Ai-Ning Zhang,Yan-Qin Wang,Yu-Zhong Wang
Nowadays, a large amount of waste fabrics has brought huge environmental and resource problems, while the traditional recycling routes are downcycling with low efficiency and complex separation processes. Herein, we demonstrate a green and facile route to up-recycle waste fabrics (cotton-polyester blending or cotton fabrics) into a high-performance microwave absorber. In this design, an assistant coating was deposited onto the fiber surface of the waste fabric through the assembly of tannic acid-Fe 2+ (TA-Fe 2+ ), which effectively catalyzed the polymer fiber into highly graphitized porous carbon fiber at high temperatures. Meanwhile, the Fe nanoparticles from the reduction of Fe 2+ ions were evenly embedded on the surface of porous carbon fibers. Consequently, the resultant porous carbon/Fe composites with hierarchical microstructures displayed excellent microwave absorption performances. Typically, the microwave absorber from waste polyester-cotton blended fabric could reach a minimum reflection loss ( RL ) of -50.5 dB at a thin coating thickness of 1.7 mm, and the minimum RL from waste cotton fabric absorber reached -47.1 dB at a thickness of 2.5 mm. This work provides a new idea to convert waste fabrics into high value-added microwave absorbing materials in a simple and environmentally friendly way, which will help reuse resources and protect the environment.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Haosheng Xiang,Bochu Wang,Mengqiu Zhong,Wenguang Liu,Dehai Yu,Yilong Wang,Kam C. Tam,Guofu Zhou,Zhen Zhang
Paper-based materials have been widely used in packaging replacing nonbiodegradable fossil-based polymers due to the increasing concerns on environmental pollution. However, paper is hygroscopic and its mechanical strength is dramatically reduced in the presence of moisture. The current hydrophobic modification of paper via nonbiodegradable polymer coating hinders the recycling of paper. A sustainable approach was proposed to prepare superhydrophobic cellulose nanocrystals (CNCs) by anchoring octadecylamine (ODA) on the surface of CNCs via the self-polymerization of tannic acid and Michael addition/Schiff base reaction between polytannic acid-coated CNCs (PTA@CNCs) and ODA. The obtained ODA–PTA@CNCs could be well dispersed in ethanol and sprayed onto different substrates to form superhydrophobic coatings, such as paper, cotton, and polyurethane. The outstanding superhydrophobicity of ODA–PTA@CNCs is attributed to the low surface energy of ODA and multiscale roughness of CNC nanorods. The promising applications of ODA–PTA@CNCs in waterproof paper-based packaging, antifouling and breathable textile, semipermeable membrane, oil–water separation, Janus paper, and actuators were demonstrated. Furthermore, the durability of superhydrophobic ODA–PTA@CNCs was confirmed by abrasion and washing tests. Overall, ODA–PTA@CNCs are promising sustainable and versatile hydrophobic coatings due to their facile preparation, biodegradability, convenience, and durability.
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Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 23
·4386-4394
·
IF 7.571
Wenlin Chu,Xiang Ke,Zhiyun Dong,Jing Xie,Jun Luo,Jianshu Li
As an ideal biomaterial, the injectable dual crosslinking hydrogel can fill irregular shaped defects for treating bone defects. Despite advances in the fabrication of injectable dual crosslinking hydrogels, current methods pose several limitations in the gelation process, such as unadjustable injectability, materials loss after injection and the employment of nonphysiological environments. A more rational designed hydrogel should be shear-thinning and self-healing quickly after injection, which requires a reversible noncovalent or dynamic covalent interaction. Besides, the improved mechanical properties and stability can be achieved in vivo. In this present research study, inspired by a high Ca2+ concentration in the bone defect sites, a strategy combining hydrogen bonds and ion coordination to construct dual crosslinking hydrogels is developed. The prefabricated gel precursors based on hydrogen bonds of synthetic triblock poly(aspartic acid)–poly(ethylene glycol)–poly(aspartic acid) copolymers and tannic acid can be injected smoothly and recover rapidly to the initial state after injection. In addition, the hydrogel network can be crosslinked more tightly through the –COOH–Ca2+ chelation, which results in reinforced mechanical properties and stability. The developed injectable dual crosslinking hydrogels will provide a design idea for the secondary crosslinking of injectable hydrogels in vivo, especially in the bone repair sites.
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高影响因子
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