JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 48
·51367
·
IF 3.125
Yujiao Gao,Dongning Liu,Yuanyuan Xie,Yiheng Song,Enwen Zhu,Zhuqun Shi,Quanling Yang,Chuanxi Xiong
In recent years, the wearable electronic skin (E-skin) has attracted more and more attention due to high sensitivity, good portability and flexibility. In this work, we used the 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibril (TOCN) as the substrate, and used the in-situ polymerization method to introduce polypyrrole (PPy) into the TOCN substrate. Then, the nylon gauze was used as microstructure template to prepare a TOCN/PPy E-skin with a surface microstructure. This E-skin possessed excellent sensing and mechanical properties. In the pressure range of 0–600 Pa, the sensitivity of E-skin was 3.13 kPa −1 . In addition, the E-skin exhibited ultrafast response/recovery time (≤10 ms), ultralow detection limit of 0.3 Pa, good stability (>9000 cycles) and mechanical strength of up to 117 MPa. Therefore, the TOCN/PPy E-skin has broad development prospects in the fields of artificial intelligence and health monitoring.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yueqian Liu,Yu Rong,Yuanjin Zeng,Jiangkai Bao,Zhuqun Shi,Chuanxi Xiong,Quanling Yang
The TEMPO-oxidized cellulose nanofibril (TOCN) is a green, renewable, recycled material with high performance developing natural, environmentally friendly triboelectric materials. However, the performance of natural polymer triboelectric materials needs to be further improved. In this work, a novel high-performance TOCN-based triboelectric material was prepared and enhanced by increasing oxygen-rich groups and porous structure by regulated TEMPO-mediated oxidation and direct freeze-drying process. Oxygen-rich groups and porous structures synergistically boosted the surface charge density of the material during contact separation to enhance the triboelectric output performance. The open-circuit voltage of the triboelectric nanogenerator (TENG) was realized to be enhanced by 36 % and 84.5 %, respectively, with the power density up to 1.003 W/m 2 . Meanwhile, finite element analysis calculations further verified that the oxygen-rich groups help to increase the surface charge density of the material and make electron transfer easier. This study provides a new strategy for preparing high-performance, environmentally friendly, biocompatible biomass triboelectric materials.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 27
·期 2
·915-925
·
IF 3.917
Dai Lei,Cheng Ting,Xi Xiangju,Nie Shuangxi,Ke Huizhen,Liu Yishan,Tong Shuhua,Chen Zhirong
Abstract Water pollution caused by industrial discharges is a severe threat to our society. Thus, efficient and sustainable materials that can provide potential effective solutions are in high demand. The present work reports the development of a versatile strategy based on TEMPO-oxidized cellulose nanofibers (TOCN)/cationic guar gum (CGG) self-assembling hydrogels to remedy wastewater containing oil, heavy metal ions or organic dyes. The TOCN/CGG hydrogel-coated filter papers, prepared via a layer-by-layer deposition process, show a high oil/water separation efficiency (around 99%), with the coating amount of being as low as 0.032 g m −2 (dry mass). Through gravitational force only, the water flux can be as high as 443 L m −2 h −1 . The as-prepared oil/water separation materials exhibited good recyclability. The monolithic TOCN/CGG hydrogel can also efficiently remove copper ions (Cu 2+ ) and dyes (i.e. thioflavin T and methyl orange), based on an adsorption mechanism. The adsorption amount of Cu 2+ can be as high as 498.5 mg g −1 , while that of thioflavin T and methyl orange can be 430.2 mg g −1 and 134.3 mg g −1 , respectively. The mass transfer driving force and the number of active binding sites are the two main factors affecting the adsorption process. This all-polysaccharide hydrogel system may be a promising potential for wastewater remedy, due to its facile/“green” preparation process and high performance, as well as the abundance and environmental-friendliness of its raw materials. Graphic abstract
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Ning Ma,Junyang Fang,Lingxiao He,Xinxu Zhao,Shuangyu Wei,Lingchao Cai,Can Jin,Chaoqun You,Fei Wang
Coptis herbs and Sophora moorcroftiana are primary sources of alkaloids with significant application value, including matrine (MT). Currently, in the separation and purification methods of alkaloids, while the adsorption method is straightforward and practical, most adsorption materials are non-renewable synthetic compounds, which can lead to environmental pollution. Therefore, we utilized TEMPO-modified natural biomass macromolecular cellulose nanocrystals (TOCN) and environmentally degradable dendritic mesoporous organosilica nanoparticles (DMONs) as raw materials, employing a surface assembly technique to coat negatively charged cellulose onto the surface of DMONs. This process led to the synthesis of TOCN@DMONs, an effective and eco-friendly bio-based composite material. The TOCN@DMONs were subjected to various analytical techniques, which unequivocally confirmed its successful synthesis and demonstrated its impeccable physical and chemical properties. The prepared TOCN@DMONs exhibited nanoscale dimensions, abundant pore structure, and excellent thermal stability. The adsorption process of MT on TOCN@DMONs followed the pseudo-second-order kinetics and Langmuir isotherm model. Thermodynamic parameters indicated that the adsorption process was spontaneous, endothermic, and involved weak chemical bonds. These findings indicate that TOCN@DMONs, as a green and highly efficient adsorbent, has a good application potential for the concentration of total alkaloids and the purification of MT from Coptis herbs and Sophora moorcroftiana extracts.
研究领域:
植物化学
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环境科学
·
药物分离与纯化
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产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2018
·Vol. 25
·期 12
·7315-7328
·
IF 3.809
Zhang Lili,Lu Hailong,Yu Juan,Fan Yimin,Yang Yiqin,Ma Jinxia,Wang Zhiguo
Abstract A lignocellulose-based composite hydrogel, as a novel biosorbent, was prepared for Cu 2+ removal from wastewater. TEMPO-oxidized cellulose nanofibrils (TOCN) were dispersed in a 7 wt% NaOH/12 wt% urea aqueous solution at room temperature. Meanwhile, the dissolved cellulose was obtained in the same system at subzero temperature. The composite hydrogels were prepared by blending the dissolved cellulose solution, TOCN dispersion, and alkali lignin solution in an NaOH/urea aqueous solution. The composite hydrogel exhibits excellent adsorption capacity for heavy metals, which can be attributed to the synergistic effects of physical adsorption (porous 3D structure) and chemical adsorption (active sites: carboxyl and phenolic groups). The maximum amount of adsorbed Cu 2+ onto composite hydrogel can reach 541 mg/g, which was achieved after 45 min. The adsorption behavior is well-described by the pseudo-second-order kinetics and the Freundlich model (R 2 > 0.999). Furthermore, the composite hydrogel exhibits high-strength properties, indicating that the presence of TOCN and lignin contributes to mechanical improvements. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Yiheng Song,Man Liu,Jiangkai Bao,Yang Hu,Menghan Xu,Zhibo Yang,Quanling Yang,Haopeng Cai,Chuanxi Xiong,Zhuqun Shi
The development of high-performance cellulose-based triboelectric nanogenerators (TENG) has been a subject widely concerned by researchers. Here, we prepared a composite aerogel film based on TEMPO-oxidized cellulose nanofiber (TOCN) and copper calcium titanate (CaCu 3 Ti 4 O 12 , CCTO) nanoparticles . Under their comprehensive effects of the enhanced dielectric performance, the TOCN/CCTO-20 composite film with 20 % CCTO content based TENG device showed the best output performance of an open circuit voltage of 152 V, a short circuit current of 33.8 μA and a power density of 483 mW/m 2 , which were 3.37, 4.07 and 3.71 times higher than that of the pure TOCN based TENG device, respectively. In addition, effects of external force conditions, aerogel film size parameters and the agglomeration state of high filler content on the output performance were also studied. These results indicated that the TOCN/CCTO composite aerogel films can be used as efficient and low-cost cellulose-based triboelectric positive materials for energy harvesting.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Le Wang,Ya Liu,Wentao Duan,Feng Cao,Qianxin Lv,Sijia Zhang,Jianzhen She,Luying Yang,Boling He,Yan Hou,Liang Kong,Taiqiang Dai,Ruizhi Ning,Bolei Cai
Wound healing, especially hemostasis, requires rapid bleeding control for tissue regeneration. Although TEMPO-mediated oxidized cellulose nanofibers (TOCN) are commonly used in hemostatic materials clinically, Scarce research has explored TOCN as the sole component in sprayable hydrogels for hemostasis and wound repair. In this study, we successfully formulated a sprayable hydrogel composed solely of TOCN and water. We evaluated its effectiveness in achieving rapid hemostasis and promoting skin wound healing via comprehensive in vitro and in vivo experiments. Our findings indicate that the uniformly sized nanoscale oxidized cellulose, obtained via ultrasonic fragmentation, can form a non-crosslinked three-dimensional network in water, resembling a hydrogel. The TOCN hydrogel exhibits excellent biocompatibility and coagulation properties. When compared to sodium alginate, TOCN hydrogel demonstrates superior hemostatic results, effectively stopping bleeding in a rat liver hemostasis model. Additionally, the sprayable TOCN hydrogel showed outstanding efficacy in a rat skin-defect model, achieving complete wound closure and regeneration of dermal and epidermal tissues, including sebaceous glands and hair follicles, by day 15. Its significant hemostatic effect and promotion of wound healing were further validated in a porcine wound model. In conclusion, the study highlights the great clinical potential of TOCN-based sprayable hydrogel for hemostasis and skin healing.
研究领域:
生物医学工程
·
材料科学
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Jiasheng Wei,Lei Dai,Ping He,Meng Zhu,Feng Jiang,Zhaoxiang Zhou,Guiqiang Fei,Tingzhou Lei
MXene-contained paper is a good choice to design ultrathin and flexible electromagnetic interference (EMI) shielding materials. However, the deficiencies in strength and stability of MXene-contained paper impede its practical applications. Herein, a composite paper was proposed to address the problems, in which a filter paper was modified with a three-layer structured surface via a facile layer-by-layer coating procedure. Specifically, the TEMPO-oxidized cellulose nanofibers (TOCN)/cationic starch (CS)/MXene gel layer and TOCN/MXene nacre structure layer ensured the good EMI shielding and mechanical performances of the composite paper, while the uppermost TOCN/CS hydrogel film layer mainly protected MXene. The composite paper achieved an EMI SE of 40.3 dB at a thickness of merely 0.1894 mm (SE/ t value of ca. 212.8 dB mm −1 , SSE/ t values of ca.13216 dB cm 2 g − 1 ) and the total MXene dosage was 20 g m − 2 . Its tensile strength could be up to 11.7 MPa while the original filter paper was 6.4 MPa. Four pieces of this composite papers could be easily packed together to attain an EMI SE of nearly 70 dB. Importantly, the hydrogel film layer efficiently protected the MXene and maintained the EMI shielding performance of the composite paper when immersed in different liquids including water, HCl (1 M) and ethanol, due to the dense and compact structure of hydrogel film layer. This work provides a practical way to develop ultrathin, flexible and durable EMI shielding materials.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Jisi Chen,Yan Liu,Zhikang Liu,Yu Chen,Chenggang Zhang,Yanan Yin,Quanling Yang,Zhuqun Shi,Chuanxi Xiong
Owing to the low cost, high theoretical specific energy density and environmentally friendly, Lithium-sulfur (Li-S) batteries have become one of the most promising candidates for electrical energy storage systems. However, some technical obstacles of lithium sulfur batteries are still addressed, such as the volume expansion, non-conductivity and shuttle effect of polysulfides. Herein, we have described a simple method for preparing carbon nanofiber aerogel (CNFA) via carbonization of the 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibril (TOCN) aerogel. Special three-dimensional (3D) net-like carbon@sulfur (C@S) composite was then successfully fabricated based on CNFA with high porosity, which dramatically alleviates the volume expansion during charging and discharging process of lithium-sulfur battery, improves the conductivity of polysulfide and suppresses the diffusion and dissolution of polysulfide generated during the charge and discharge process. The results showed that the composite material exhibited an extremely high reversible capacity of 590 mA h g −1 and had a great loaded performance of 390 mA h g −1 with high load 2.9 mg/cm 2 over 200 cycles at 0.5 C. Compared with other biomass carbon materials, we have omitted the complicated high-temperature activation pore-forming process. In addition, the high sulfur loading carbon nanofibril composite aerogel also provides a way for the high-quality needs of electronic products.
研究领域:
材料科学
·
储能技术
·
纳米技术
·
电池技术
✓ 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）