CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Shuai Jiang,Meiling Zhang,Mengmeng Li,Jianhua Zhu,Aixiong Ge,Lifang Liu,Jianyong Yu
Cellulose nanofibrils (CNFs) have been developed as building blocks for highly porous foams which are superior in thermal insulation. Unfortunately, the flammability and poor mechanical performance of CNF foams limited their practical applications. In this strategy, biopolymer sodium alginate , together with nontoxic boric acid and borate, were explored to play the roles of flame retardants for methyltrimethoxysilane cross-linked CNF foams. Their co-effects on preventing CNF foams from being ignited were revealed. The composite foams were self-extinguish and showed a considerably increased limited oxygen index (up to 39.5%). Additionally, the foams were flexible with good resilience and bendability. The eco-friendly foams with low thermal conductivity (0.028 W m −1 K −1 at 25 °C), flexibility, and non-ignitability can meet the satisfactory in energy-conservation, wide applicability, and use safety.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Additive Manufacturing
·
2022
·
IF 11.632
Guoqiang Zhou,Mei-Chun Li,Faming Wang,Chaozheng Liu,Changtong Mei
The development of porous three-dimensional (3D) monoliths from natural materials for a wide spectrum of thermal insulation , energy storage and tissue engineering applications has recently gained tremendous interest. However, the lack of 3D structural customization and shape fidelity of monoliths limited their effectiveness in meeting a variety of practical uses. Herein, the material extrusion-based 3D printing technology is used to manufacture a variety of 3D customized monoliths with high shape fidelity that are useful for thermal insulation and energy storage applications . By using sustainable wood-derived cellulose nanofiber (CNF) gels as inks, the 3D printability and shape fidelity are systematically optimized by tailoring the concentration-dependent rheological properties as well as the printing parameters. Benefitted from the high fidelity and self-supporting features, the optimized 3D printed CNF monoliths can be further transformed into porous CNF scaffolds with highly-retained 3D shape using a well-established freeze-drying technique without the use of any specific container. The as-prepared CNF scaffold has porous structure , superior mechanical properties , and low thermal conductivity , demonstrating well heat insulation properties. Furthermore, the porous CNF scaffold can be used as a platform for the in-situ polymerization of aniline (ANi). The resultant CNF-PANi scaffold has a conductivity of 0.334 S•cm −1 , and delivers a high capacitance of 107.9 mF·cm −2 (@0.2 mA·cm −2 ) as a binder-free electrode in supercapacitors . This work provides some guidance for 3D printing of customizable monoliths from sustainable materials by tuning the rheological properties and printing parameters for thermal insulation and energy storage applications.
研究领域:
材料科学
·
能源工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Hongfeng Yu,Junru Yao,Jinlong Lv,Ruirui Zhang,Zi Wang,Xiangjia Song,Xiangfei Wei,Jintang Zhou
Developing lightweight, high-performance microwave absorbing materials with multiple functions has become a major challenge in the field of electromagnetic protection. In this study, ZIF-67/cellulose nanofiber (CNF)-derived Co–C/C aerogel with an integrated design for microwave absorption and thermal camouflage functions was prepared. The hierarchical pore structure with coexisting micron-scale skeletal pores and MOF-derived nanopores was constructed through in-situ growth of ZIF-67 on CNF and low-temperature carbonization regulation. Simultaneously, uniformly distributed Co nanoparticles (20–30 nm) and defect-rich graphitized carbon heterointerfaces were obtained. The Co–C/C aerogel exhibited an ultra-low density (16.21–17.35 mg/cm 3 ). In terms of microwave absorption, it achieved an effective absorption bandwidth of 6.87 GHz (covering the Ku band) at a thickness of 2.4 mm. This was attributed to the synergistic mechanisms of multiple scattering from hierarchical pores, enhanced interfacial polarization induced by low-temperature carbonization, and magnetic loss from Co nanoparticles. In addition, the material demonstrated a low thermal conductivity of 0.0492 W m −1 K −1 , and infrared imaging revealed its significant thermal signal shielding capability. This study addressed the issues of structural collapse and functional singleness in traditional MOF-derived materials through in-situ growth and low-temperature carbonization strategies, providing new insights for the design of lightweight, broadband, and multifunctional stealth materials.
研究领域:
材料科学
·
电磁学
·
热管理
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jiao Feng,Yangbing Wen,Wenmin Yang,Xianghua Hu,Yecheng Xu,Zhen Fang
The development of biodegradable films with enhanced mechanical performance is of great importance for environmental concerns. Inspired by the unique multiple hydrogen bonding of spider silk, in this work, we developed a tough polyvinyl alcohol (PVA)-based, TEMPO-oxidized cellulose nanofibers (TOCNF)-enhanced film with outstanding stretchability, mechanical strength, fatigue resistance, and biodegradability by constructing an interpenetrating polymer network (IPN) with abundant hydrogen bonds via a combination of in situ radical-crosslinking and solvent casting method. The film incorporated 1 wt% of TOCNF, namely P/A-TCF1, exhibits excellent biodegradability, outstanding elongation (470 %), significant toughness (143 MJ/m 3 ), healable efficiency (90 %) and high tensile strength (45 MPa), surpassing the performance of a vast of commercially-available films. Importantly, the P/A-TCF1 film can withstand 5000 actual 180° folds without causing any structural damage, and the tensile strength remains almost 90 % of its original value. This strategy provides a novel approach for exploring exceptional fold-resistant films.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2024
·Vol. 16
·期 6
·805
·
IF 4.7
Xinyuan Wan,Xiaojian Xia,Yunxiang Chen,Deyuan Lin,Yi Zhou,Rui Xiong
Thermal conductive coating materials with combination of mechanical robustness, good adhesion and electrical insulation are in high demand in the electronics industry. However, very few progresses have been achieved in constructing a highly thermal conductive composites coating that can conformably coat on desired subjects for efficient thermal dissipation, due to their lack of materials design and structure control. Herein, we report a bioinspired thermal conductive coating material from cellulose nanofibers (CNFs), boron nitride (BN), and polydopamine (PDA) by mimicking the layered structure of nacre. Owing to the strong interfacial strength, mechanical robustness, and high thermal conductivity of CNFs, they do not only enhance the exfoliation and dispersion of BN nanoplates, but also bridge BN nanoplates to achieve superior thermal and mechanical performance. The resulting composites coating exhibits a high thermal conductivity of 13.8 W/(m·K) that surpasses most of the reported thermal conductive composites coating owing to the formation of an efficient thermal conductive pathway in the layered structure. Additionally, the coating material has good interface adhesion to conformably wrap around various substrates by scalable spray coating, combined with good mechanical robustness, sustainability, electrical insulation, low-cost, and easy processability, which makes our materials attractive for electronic packaging applications.
研究领域:
材料科学
·
生物启发工程
·
热管理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Wenwen Li,Gege Cheng,Shuangju Wang,Yan Jiang,Xiuyu Liu,Qin Huang
Lignocellulose nanofibers (LCNF) obtained from agricultural waste are potential candidates for enhancing composite materials because of their excellent mechanical properties, abundant groups and high biocompatibility. However, the application of LCNF has received limited attention to date from researchers in the healthcare field. Herein, based on the bifunctional group (carboxyl and aldehyde groups) modified LCNF (DCLCNF) and chitosan (CS), we developed a multifunctional bio-based hydrogel (CS-DCLCNF). The addition of lignin-containing DCLCNF strengthened the internal crosslinking and the intermolecular interaction of hydrogels, and the presence of lignin and carboxyl groups increased the mechanical strength of the hydrogel and the adsorption of aromatic drugs. Results revealed that the hydrogels exhibited self-healing, injectable, and high swelling rates. The hydrogels had favorable mechanical strength (G' max of ~16.60 kPa), and the maximum compressive stress was 24 kPa. Moreover, the entire tetracycline hydrochloride (TH) release process was slow and pH-responsive, because of the rich noncovalent and π–π interactions between DCLCNF and TH. The hydrogels also exhibited excellent biocompatibility and antibacterial properties . Notably, the wound healing experiment showed that the hydrogels were beneficial in accelerating wounds healing, which could heal completely in 13 days. Therefore, CS-DCLCNF hydrogels may have promising applications in drug delivery for wound healing.
研究领域:
生物材料学
·
医学工程
·
药物递送
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Mimi Han,Wenhao Shen,Xin Tong,Jean-Pierre Corriou
Two-dimensional (2D) MXene provides large surface area for the adsorption and interaction of H 2 O molecules, which is highly desirable for the construction of humidity-sensing materials. However, the drawbacks, involving easy stacking and poor mechanical strength, pose a huge challenge to its practical application. Herein, inspired by nacred “brick-mortar” nanostructure , a nanopaper humidity sensor made of flexible TEMPO-oxidated cellulose nanofibers/MXene/silver nanowires (TOCNFs/MXene/AgNWs) was developed by vacuum-assisted filtration self-assembly strategy. The synergism of 1D TOCNFs, AgNWs “mortar” and 2D MXene “bricks” endows the nanopaper with superb tensile strength (146.3 MPa), modulus (16.9 GPa), and superior bending durability, and the obtained TOCNFs/MXene/AgNWs nanopaper humidity sensor exhibits high response value of 90% at 97% RH with a low MXene addition of 20 wt%. Furthermore, the unique photothermal response property of MXene accelerates the desorption of H 2 O molecules during sensor recovery, realizing the reversible sensing performance. The proposed humidity sensing mechanism lies in the variation of MXene interlayer d-spacing induced by adsorbing ambient H 2 O molecules and the swelling of TOCNFs. Lastly, the sensor demonstrates the possibilities in human respiration monitoring, non-contact sensing, and humidity actuating.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tao Yuan,Zhen Zhang,Qian Liu,Xiu-Tong Liu,Shao-Qu Tao,Chun-li Yao
In recent times, there has been significant interest in the utilization of cellulose nanofiber (CNF) films as the foundation for supercapacitors due to their three-dimensional structure, flexibility and eco-friendliness. An ultrasonic and vacuum filtration method was used to prepare a hybrid film consisting of MXene (Ti 3 C 2 T x ), CNF and liquid metal (LM). The combination of CNF and LM with MXene produces a porous structure with higher electrical conductivity, which facilitates the transportation of ions and electrons within the composition and confers the material with heightened electrochemical properties. The CNF/MXene/LM electrode has a significant area capacitance of 871.3 mF cm −2 at a current density of 5 mA cm −2 . The hybrid film demonstrates excellent stability, maintaining a high conductivity of 546.4 S∙cm −1 and retaining 96.9 % capacitance after 2000 cycles at a current density of 10 mA cm −2 . By utilizing the thin film as an electrode, a high-performance quasi-solid supercapacitor was fabricated, with a remarkably thin thickness of only 0.319 mm. Supercapacitors show exceptional electrical properties, including a surface-specific capacitance of 188.2 mF cm −2 at a current density of 5 mA cm −2 . This study indicates that flexible electrodes made from cellulose nanofiber have extensive potential in the realm of supercapacitors.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiaohan Liu,Zhe Wang,Minzhi Chen,Yutian Guo,Liangke Lin,Qi Wang,Xiaoyan Zhou
Layered double hydroxides (LDHs) tend to agglomerate and primarily exhibit a single condensed phase flame-retardant mechanism, limiting their application as flame retardants (FRs) for wood. In this paper, we prepared a composite FR by intercalating phytic acid (PA) into the LDH layers through anion exchange. Additionally, cellulose nanofibers (CNF) were incorporated to interact with the hydroxyl groups on the LDH surface, improving the dispersion and stability of LDH. LDH-PA-CNF exhibited excellent flame-retardant performance and good dispersibility, which was suitable for flame-retardant modification of wood. After impregnating the wood with LDH-PA-CNF, the total heat release (THR) and total smoke release (TSR) of Wood@LDH-PA-CNF decreased by 21.2 % and 56 %, respectively, compared with the untreated wood. The limited oxygen index (LOI) value of Wood@LDH-PA-CNF has been significantly improved from 21 % to 75.4 %. Based on the analysis of the composition and chemical structure of the residues and gases produced during the combustion of Wood@LDH-PA-CNF, the synergistic flame-retardant mechanism in both condensed and gas phases of LDH-PA-CNF was proposed. This study provides novel insights into the design of high-performance FRs and offers valuable clues for enhancing the homogeneous dispersion and synergistic effects of inorganic FRs.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xia Zhang,Fuhao Dong,Mingming Yu,Xu Xu,He Liu,Haiqin Lu
The development of environmentally friendly waterborne polyurethane (WPU) elastomers can significantly reduce reliance on organic solvents, which is crucial for environmental protection. However, the manufacturing of WPU elastomers with high strength and self-healing properties has proven to be extremely challenging. Hence, a rapid self-healing supramolecular material featuring high strength was explored by synergistically combining flexible disulfide and urea bonds into water-borne polyurethane (WPU). Simultaneously, combining cellulose nanofibres (CNF) rich in hydroxyl groups with the WPU matrix not only enables a dynamic network composed of strong hydrogen bonds but also forms a strain-induced reversible network under the special nano-confinement effect. Surprisingly, the obtained nanocomposite films showed outstanding mechanical properties, with extremely high tensile strength (54.4 MPa), elongation at break (896.1 %), and toughness (255.6 MJ/m −3 (−|−)). After incorporating CNF, the nanocomposite elastomer exhibited the desired self-healing efficiency (92.7 %). Furthermore, the prepared nanocomposite elastomer emits blue fluorescence under 365 nm ultraviolet irradiation, which can be used for microcrack detection in equipment. In addition, we verified the broad application prospects of the nanocomposite elastomers in clothing anti-counterfeiting. Our study provides new insights into the development of luminescent materials with rapid self-healing abilities and high strength.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Dong Fu,Linhui Xing,Yang Xie,Peng Li,Fan Yang,Xin Sui,Jiaying Liu,Jialong Chi,Bo Huang,Jun Shen
Conductive hydrogels (CHs) have demonstrated great potential application in wearable devices as a substitute for traditional rigid metal electrode sensors. However, the design of CHs with excellent mechanical stability for extreme environmental conditions remains a great challenge due to the high water content present in hydrogels. Herein, a novel anti-freezing and anti-drying zwitterionic poly (ionic liquid) organohydrogel was prepared via free-radical polymerization of acrylic acid (AA), 1-propyl-3-vinyl imidazole sulfonate (ZILs), cellulose nanofibers (CNFs) and ferric chloride (FeCl 3 ) in a glycerol/water mixture solvent. The synergistic interaction in the hybrid crosslinking, composed of physical/chemical crosslinking, endowed organohydrogel with desired mechanical properties, including stretchability (1032 %), self-recoverability (∼88 % recovery efficiency after 60 min), and excellent durability (500 cycles with 30 % deformation). Moreover, the organohydrogel exhibited satisfied conductivity (2.99 mS/cm), high strain-sensitive behavior (gauge factor (GF) up to 4.86), and significant sensing stability in a wide temperature range (−20–50 °C) due to the introduction of the binary solvent, the zwitterionic unit of ZILs, and Fe 3+ . Combined with the above advantages, a simple strain sensor was assembled, which offered remarkable real-time sensitivity in detecting human motions. This work provided new insights into the design of flexible sensors for applications in extreme environments.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 5
·3183-3192
·
IF 3.917
Pan Ying,Liu Longxiang,Song Lei,Hu Yuan,Jiang Shudong,Zhao Hongting
Abstract Cellulose nanofibers (CNFs) were modified with 2 bilayers coating composed of polyethlenimine (PEI), melamine and phytic acid using a layer-by-layer self-assembly technique. The (PEI + melamine/phytic acid) 2 based coating was successfully deposited on the surface of modified cellulose nanofibers (MCNFs). Herein, the CNF referred to the carbon source and the phytic acid was chosen as the acid source. Polyethylenimine and melamine served as the blowing agents. Then the CNF and MCNF were introduced to the polyvinyl alcohol (PVA) matrix to investigate the thermal decomposition, flammability, light transmittance and mechanical properties of the PVA/CNF and PVA/MCNF composites. The thermal decomposition of PVA-MCNF-6 (with 6 wt% MCNF) was retarded compared with that of pure PVA. Meanwhile, the addition of 6 wt% MCNF obviously reduced the peak heat release rate of PVA, as evidenced by the 37% reduction. The PVA/CNF and PVA/MCNF composites exhibited similar light transmittance compared with the pure PVA film. Moreover, the addition of CNFs in the PVA matrix resulted in higher tensile strength and elongation at break than those of the PVA matrix. Graphical abstract
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）