Advanced Healthcare Materials
·
2024
·
IF 10
Ying Wang,Yicheng Guo,Yuqing Liu,Xiaohong Zhao,Yong Huang,Xiaorong Zhang,Xiaohong Hu,Kibret Mequanint,Gaoxing Luo,Malcolm Xing
Achieving hemostasis in penetrating and irregular wounds is challenging because the hemostasis factor cannot arrive at the bleeding site, and substantial bleeding will wash away the blood clot. Since the inherently gradual nature of blood clot formation takes time, a physical barrier is needed before blood clot formation. Herein, an ultra-light and shape memory hemostatic aerogel consisting of oxidized bacterial cellulose (OBC) and platelet extracellular vesicles (pVEs) is reported. The OBC-pVEs aerogel provides a physical barrier for the bleeding site by self-expansion, absorbing the liquid from blood to concentrate platelets and clotting factors and accelerating the clot formation by activating platelets and transforming fibrinogen into fibrin. In the rat liver and tail injury models, the blood loss decreases by 73% and 59%, and the bleeding times are reduced by 55% and 62%, respectively. OBC-pVEs aerogel has also been shown to accelerate wound healing. In conclusion, this work introduces an effective tool for treating deep, non-compressible, and irregular wounds and offers valuable strategies for trauma bleeding and wound treatment.
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DOI
高影响因子
POLYMER SCIENCE SERIES A
·
2020
·Vol. 62
·期 6
·722-731
·
IF 0.968
Xuzhen Zhang,Lu Chen,Zhou Chenmeng,Wen Xin,Li Yong
Abstract Cellulose nanocrystals (CNC)/poly(butylene adipate- co -butylene terephthalate) composites enhanced compatibility with phthalic anhydride were one-step prepared via melt blending. The obtained composites then underwent squeezing treatment in a two-roll milling equipment at a given temperature. CNC/PBAT composites were separated and then tested via FTIR and UV–Vis spectrophotometer. During reactive blending, phthalic anhydride selectively reacts with CNC. Before squeezing, tensile strength of CNC/PBAT composites is weakened with increasing phthalic anhydride content. After squeeze treatment at an extension ratio of 6, tensile strength of CNC/PBAT (3/97) is dramatically increased from 29.6 to 148.0 MPa, which is much higher than that of pristine PBAT 85.0 MPa. SEM and WAXD results show that PBAT crystallinity is increased after orientation, and CNC show an orientation arrangement along force direction in PBAT matrix.
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DOI
高影响因子
Science of Advanced Materials
·
2022
·Vol. 14
·期 11
·1710-1715
·
IF 1.067
Bian Hang,Zhang Xuejian,Li Yongtao,Li Dong,Li Peng,Liu Huisheng,Wang Wangyang,Xu Ting
In order to replace casein superplasticizer in self-leveling mortars, polycarboxylate grafted cellulose nanocrystals (PC-g-CNCs) have been synthesized and characterized. AFM revealed the spherical and rod-like shape of casein and PC-g-CNCs, indicating that superplasticizers adsorb differently
on the surface of cement particles. In ternary binder-based self-leveling mortars, PC-g-CNCs resulted in smoother paste surfaces without bleeding or segregation and improved fluidity retention than casein. It might be due to CNCs’ high water retention capacity, which changed the viscosity
of mortar while also facilitating delayed cement hydration. Such a PC-g-CNCs emerge as potential substitute for casein superplasticizer applications.
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高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Baoxia Wang,Jiangjun Zhou,Zixuan Wang,Shiling Mu,Rong Wu,Zhongkai Wang
The preparation of high-performance cellulose nanocrystals (CNCs)/plant oil-derived polymer composites is still a challenge, due to their poor compatibility. Here, by designing amide groups and epoxy groups on sunflower oil derived polymers, appropriate interfacial hydrogen bond interactions between the polymers and CNCs were constructed, where CNCs were homogenously dispersed in polymer matrix. Tensile tests and DMA results revealed that the incorporation of CNCs into sunflower oil derived epoxy polymers significantly enhanced the tensile strength and storage modulus. More importantly, nanocomposites with 50 wt% CNCs are still hydrophobic, which not only show a fast and reversible humidity induced modulus switch, but also exhibit high wet strength (19.9 MPa) after equilibrium water adsorption. The present work revealed that proper designed CNCs/plant oil polymer nanocomposites are good candidates for high performance and functional materials, which are able to replace petroleum-based materials in various fields.
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Zhaofeng Ouyang,Hou-Yong Yu,Meili Song,Jiaying Zhu,Duanchao Wang
Herein, self-healing multi-branched cellulose nanocrystals/polyvinyl alcohol (MCNC/PVA) composite films with excellent sensitivity to human motions was synthesized by employing MCNC as reinforcing agent, where the potassium chloride (KCl) was added to enhance the conductivity and strain sensitivity of the composite film. There was a synergistic effect between MCNC and PVA, which could promote the slip and recombination of hydrogen bonds , so that the films had robust strength (2.2 times to pure PVA) and high self-healing efficiency (69.54% after 20 min). Especially, the flexible composite film could clearly monitor both large and subtle human motions (finger bending, swallowing, breathing, and insect crawling), and showed larger subtle strain sensitivity (strains <24.5%) with a gauge factor (GF) of 2.4, which was relatively larger than the GF of ionic hydrogel and film-based skin sensors, which could solve the current problems of poor mechanical flexibility and low sensitivity of electronic skin, and had great potential application in the fields of self-healing soft electronic skin sensors for human motion detection and healthcare.
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高影响因子
CELLULOSE
·
2014
·Vol. 21
·期 6
·4557-4567
·
IF 3.033
Feng Jin,Shi Qingshan,Li Wenru,Shu Xiulin,Chen Aimei,Xie Xiaobao,Huang Xiaomo
In order to improve the antimicrobial activity of bacterial cellulose (BC), the silver nanoparticles (Ag NPs) were in situ fabricated on the BC membranes, affording BC and Ag hybrid antimicrobial materials, BC + Ag, which possesses excellent antimicrobial performance. Typically, carboxyl groups were firstly introduced into BC by TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation. Then, the carboxyl-functionalized BC was performed with ion-exchange reaction to change the sodium ions into Ag + by immersing in AgNO 3 aqueous solution, generating Ag + anchored BC. Finally, two types of distinct reductive reagents including NaBH 4 and sodium citrate were employed to transform Ag + into Ag NPs to fabricate BC + Ag. The diameters of Ag NPs were determined to be 3.8 nm for NaBH 4 -reduced BC + Ag, and 22.0 nm for sodium citrate-reduced one, respectively. The silver content of BC + Ag were determined to be 1.944 and 2.895 wt% for NaBH 4 -reduced sample and sodium citrate-reduced one, respectively. Two types of BC + Ag both showed a slow and persistent Ag + release profile, but the NaBH 4 -reduced one released much more Ag + than that of sodium citrate under the same measurement condition. In-depth antibacterial analysis via the disc diffusion and colony forming count method disclosed that BC + Ag exhibited strong bactericidal effects against both Escherichia coli and Staphylococcus aureus . And the antibacterial activity of NaBH 4 -reduced BC + Ag was higher than the sodium citrate-reduced one. Overall, this study would further improve the antibacterial efficiency of BC + Ag.
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Boshi Yu,Zhenyu Zhang,Wei Liu,Fei Liu,Juncheng Huang,Haining Na,Jin Zhu
A hydroxyl-enriched core/shell structured carbon nanotube (CNT/C-OH) is prepared by the method of hydrothermal carbonization (HTC) as a catalytic accelerator to induce highly efficient hydrolysis of regenerated cellulose to glucose. By use of sonication with high sound intensity, the carbon source (namely glucose) is homogeneously dispersed with CNT to form a colloid. Accordingly, a high-quality CNT/C-OH with a hydroxyl-enriched coating layer is produced in the following HTC. The oxygen mass content of the shell is up to 16.38%. A great deal of hydroxyl groups contribute to the CNT/C-OH having a strong affinity to adsorb with the regenerated cellulose and thus to enhance its hydrolytic ability to convert to sugar. In a low-acid aqueous system with CNT/C-OH, the cellulose conversion and the glucose yield reach 94.62 and 78.82%, respectively. A good reusability of CNT/C-OH is also found in multiple steps of hydrolysis of the regenerated cellulose to sugar.
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Shangwei Song,Haitao Li,Peiwen Liu,Xianghe Peng
Cellulose , a shining star of nano-dimensional self-assembled unit materials, has perfect biocompatibility, mechanical toughness, low density, and powerful modification potential characteristics, all of which make cellulose and its derivatives gained wide attention in various applications, especially for the expanding market for microwave absorption (MA) and electromagnetic interference (EMI) shielding. In this paper, the latest research progresses of cellulose and its derivatives in MA and EMI shielding, including the state-of-the-art design concepts, synthetic strategies, and electromagnetic characters, were summarized. Different types of cellulose-based electromagnetic components have been classified according to their electromagnetic mechanism of action (shielding or absorption), filler properties (dielectric, magnetic or electrical conductivity), and structural expression (film or aerogel). The benefits stemming from its applications are analyzed, providing novelties and unique perspectives for relevant research. Finally, the main obstacles and bottlenecks for further applications were analyzed, and the trend and prospects of cellulose material's future research were proposed.
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2021
·
IF 7.033
Mingzhao Guan,Qiyu Liu,Haosheng Xin,Enchen Jiang,Qiaozhi Ma
Molten salt hydrates (MSHs) are remarkable in breaking through the recalcitrant structure of microcrystalline cellulose and raw biomass. After being pretreated in 60 wt% LiBr at 130 °C for 2 h, cellulose crystallinity as well as degree of polymerization (DP) decreased. It was found that 91.3% yield of pretreated cellulose was removed from MSHs by filteration followed by being hydrolyzed into glucose with a high yield of 75.3% by dilute acid under mild reaction conditions. The pretreatment process also works on raw corn stover hydrolysis. After being pretreated at 100 °C for 5 h, 88.4% yield of cellulose in biomass was recovered and can be hydrolyzed into 54.9% yield of glucose with dilute acid. It was found that the cellulose in corn stover can be easier degraded compared with microcrystalline cellulose during MSHs pretreatment, which dues to the formation of acetic acid from hemicellulose hydrolysis. The proposed pretreatment technique presents a promising potential for glucose production from biomass in a commercial way.
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高影响因子
Materials
·
2024
·Vol. 17
·期 2
·325
·
IF 3.1
Peng-Xiang Guo,Xin-Gang Wang,Mao-Qian Yang,Jian-Xin Wang,Fan-Jun Meng
With the advancement of industrial economies, incidents involving spills of petroleum products have become increasingly frequent. The resulting pollutants pose significant threats to air, water, soil, plant and animal survival, as well as human health. In this study, microcrystalline cellulose served as the matrix and benzoyl peroxide (BPO) as the initiator, while butyl acrylate (BA) andN,N′-methylene bisacrylamide (MBA) were employed as graft monomers. Through free radical graft polymerization, cellulose-graft-poly(butyl acrylate-N,N′-methylene bisacrylamide) [Cell-g-P(BA-MBA)], possessing oil-adsorbing properties, was synthesized. The chemical structure, elemental composition, surface morphology and wetting properties of the graft polymerization products have been characterized, using infrared spectroscopy, elemental analysis, scanning electron microscopy and contact angle testing. The adsorption properties of Cell-g-P(BA-MBA) for various organic solvents and oils were then assessed. The experimental results demonstrated that Cell-g-P(BA-MBA) exhibited a maximum adsorption capacity of 37.55 g/g for trichloromethane. Adsorption kinetics experiments indicated a spontaneous and exothermic process involving physical adsorption, conforming to the Freundlich isotherm model. Furthermore, adsorption kinetics experiments revealed that Cell-g-P(BA-MBA) displayed favorable reuse and regeneration performance, maintaining its adsorption capacity essentially unchanged over fifteen adsorption–desorption cycles.
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高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 13
·4496-4504
·
IF 7.393
Qinghong Zheng,Huixin Li,Yiling Zheng,Yinan Li,Xi Liu,Shuangxi Nie,Xinhua Ouyang,Lihui Chen,Yonghao Ni
A cellulose-based flexible organic light-emitting diode (OLED) with enhanced stability and light extraction efficiency was prepared by using a PEDOT:PSS PH1000 transparent conductive electrode coated on regenerated cellulose film (RCF). The PH1000/RCF transparent conductive electrode exhibits extra-high bending stability as compared to the traditional ITO/RCF electrode, which can be attributed to the highly flexible nature of PH1000 and the strong interaction between PH1000 and cellulose. Finite-difference-time-domain simulations show that, due to the smaller refractive index mismatch between PH1000 and RCF, a small proportion of photons are confined in the optical waveguide. The external quantum efficiency of the PH1000/RCF OLED (3.65%) is enhanced by nearly 36.2%, as compared to the ITO/RCF OLED device (2.68%). The ITO-free cellulose-based flexible OLED with enhanced stability and external quantum efficiency would be attractive in a wide range of applications, such as flexible displays, wearable devices and so on.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 42
·21178-21185
·
IF 9.931
Hao Chen,Xu Shi,Jianfang Liu,Kecheng Jie,Zihao Zhang,Xiaobing Hu,Yimei Zhu,Xiuyang Lu,Jie Fu,He Huang,Sheng Dai
Zeolite materials play a significant role throughout the oil refining and petrochemical industry. Microporous ZSM-5 has a high degree of crystallinity but low mass transfer, while hierarchical ZSM-5 shows a low degree of crystallinity as well as acidity. In this work, we first report the synthesis of ZSM-5 with a new morphological structure, which has nanocrystalline ZSM-5 particles on the surface of an intact ZSM-5 zeolite. This not only improved the mass transfer in microporosity but also overcame disadvantages of hierarchical ZSM-5 including low degrees of crystallinity and acidity. This new and very efficient structure with both intracrystal microporosity and intercrystal macroporosity, formed by secondary crystallization after the intact ZSM-5 zeolite was synthesized, was verified by transmission electronic microscopy, N2 adsorption and desorption, and X-ray diffraction. The obtained ZSM-5 zeolite showed a uniform size (∼200 nm), high crystallinity acidity, and a suitable hierarchical structure that exhibited excellent properties in the catalytic fast pyrolysis of cellulose to produce aromatics.
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高影响因子
危险品化学品经营许可证（带存储）