POLYMER
·
2020
·
IF 4.231
Tao Shi,Yun Lu
As one of the most abundant renewable and biodegradable materials in nature, cellulose is difficult to dissolve in common organic and inorganic liquids. Here, a series of regenerated cellulose films were prepared by using a specific tetra-butylammonium hydroxide TBAH/H 2 O/DMSO ternary solvent system. Especially, the fluorescent cellulose film was obtained successfully via a ring-opening grafting reaction between a modified fluorescein molecule with 3-expoxypropoxy and cellulose. The fluorescent cellulose films exhibited excellent fluorescence stability and pH sensitivity to the aqueous solutions with different degree of acid and alkaline. Moreover, the anisotropic fluorescein cellulose film was obtained for the first time by stretching and further drying the initial fluorescence cellulose hydrogel, and displayed a novel polarized emission. This work provided a simple, low-cost and environment-friendly pathway to fabricate fluorescent cellulose films, showing potential applications in packaging, decoration materials and other functional materials such as anti-counterfeiting paper.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Yuanyuan Guo,Quan Wang,Hao Li,Yixun Gao,Xuezhu Xu,Biao Tang,Yao Wang,Bai Yang,Yi-Kuen Lee,Paddy J. French,Guofu Zhou
Fluorescent patterns with multiple functions enable high-security anti-counterfeiting labels. Complex material synthesis and patterning processes limit the application of multifunctional fluorescent patterns, so the technology of in situ fluorescent patterning with tunable multimodal capabilities is becoming more necessary. In this work, an in situ fluorescent patterning technology was developed using laser direct writing on solid cellulose film at ambient conditions without masks. The fluorescent intensity and surface microstructure of the patterns could be adjusted by programmable varying of the laser parameters simultaneously. During laser direct writing, carbon dots are generated in situ in a cellulose ester polymer matrix, which significantly simplifies the fluorescent patterning process and reduces the manufacturing cost. Interestingly, the tunable fluorescent intensity empowers the fabrication of visual stereoscopic fluorescent patterns with excitation dependence, further improving its anti-counterfeiting performance. The obtained fluorescent patterns still show ultrahigh optical properties after being immersed in an acid/base solution (pH 5–12) over one month. In addition, the anti-UV performance of the obtained laser-patterned film with transmittance around 90% is comparable to that of commercial UV-resistant films. This work provided an advanced and feasible approach to fabricating programmable, performance-tunable, subtle fluorescent patterns in large-scale for industrial application.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yinan Li,Jun Wang,Jiajia Guo,Chenglong Fu,Liulian Huang,Lihui Chen,Yonghao Ni,Qinghong Zheng
Actuators are widely used in bionic devices and soft robots, among which invisible actuators have some unique applications, including performing secret missions. In this paper, highly visible transparent cellulose-based UV-absorbing films were prepared by dissolving cellulose raw materials using N -methylmorpholine-N-oxide (NMMO) and using ZnO nanoparticles as UV absorbers. Furthermore, transparent actuator was fabricated by growing highly transparent and hydrophobic polytetrafluoroethylene (PTFE) film on regenerated cellulose (RC)-ZnO composite film. In addition to its sensitive response to Infrared (IR) light, the as-prepared actuator also shows a highly sensitive response to UV light, which is attributed to the strong absorption of UV light by ZnO NPs. Thanks to the drastic differences in adsorption capacity between the RC-ZnO and PTFE materials for water molecules, the asymmetrically- assembled actuator demonstrates extremely high sensitivity and excellent actuation performance, with a force density of 60.5, a maximum bending curvature of 3.0 cm −1 , and a response time of below 8 s. Bionic bug, smart door and the arm of excavator made from the actuator all exhibit sensitive responses to UV and IR lights.
研究领域:
材料科学
·
仿生学
·
软体机器人技术
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Xin Gao,Meng Li,Heng Zhang,Xiaoning Tang,Keli Chen
In this study, regenerated cellulose (RC) thin films were obtained using parenchyma cellulose from large clustered bamboos which were endemic to Xishuangbanna area in Yunnan province, China. The bamboo parenchyma cells were separated from their low-temperature (140 ℃ of the maximum temperature) kraft pulps through multi-screening. The cellulose was dissolved in N,N -dimethyl acetamide (DMAc) solvent with LiCl amount from 6 % to 10 %, then regenerated in the glycerol-water solution. X-ray diffraction analysis indicated the crystalline forms of RC films were transited from cellulose I to cellulose II. TGA analysis suggested that lower LiCl usage take an advantage on the higher thermal stability of the RC films. The DMAc-related solvent with a relatively lower LiCl dosage displayed a stronger capacity of cellulose dissolution, shed light on its considerable industrial application prospects and facilitated the high value-added utilization of waste biomass resources.
研究领域:
材料科学
·
生物质资源利用
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jie Chen,Haoyang Xu,Chenjing Zhang,Rongliang Wu,Suna Fan,Yaopeng Zhang
Biomaterial-based origami functional films are fundamental to the development of implantable flexible electronics and wearable devices. However, the challenge of simultaneously achieving excellent strength, flexibility and functionality is yet to be fully explored. Inspired by the Fick’s law, we fabricate an origami pristine silk fibroin (SF) film via a straightforward yet robust strategy, using water and formic acid as the structural regulator. Benefiting from the asymmetric diffusion and the effect on the inter/intra-molecular hydrogen bonds of water, our strategy endows the SF film with gradient condensed structure from surface to interior, which has been both experimentally and theoretically confirmed. Owing to this unique structure with higher surficial crystallinity than interior, the SF films exhibit an excellent integration of strength, flexibility, and moisture-response functionality. The films are successfully origami-folded into a paper crane/boat without any damage, and can realize dynamic jump and moisture management functions. This work highlights a versatile path for exploiting biomaterial-based films combined with enhanced flexibility, strength, and additional functionalities.
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
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xueqi Li,Ziqiang Shang,Yaoxing Wang,Jiuqing Liu,Yanjun Xie,Jian Li,Yiqi Liu,Wentao Gan
Magnetic soft robots composed of stimuli-responsive materials are promising for biomedical engineering applications; however, typical responsive materials are fabricated with nondegradable polymeric substrates. In this study, we report a flexible, biodegradable, and magnetically sensitive cellulose film (M-film) that can be utilized for magnetically controllable soft robots (M-robots) with programmable locomotion, cargo delivery, and remote wireless operation functions. The M-film with good foldability, origami, and magnetic properties is synthesized by a simple paper-making process using cellulose nanofibers, additive sodium alginate, and BaFe12O19 particles. Through the following origami–magnetization process, the M-robot with multimodal movements is designed: climbing over the obstacles in the walking environment; additionally, this process can complete various cargo transport tasks by clawing, rolling, and flipping. This approach expands the precise controllability and manipulability of environmentally friendly cellulose nanomaterials beyond the known applications and opens the prospects of their implementation in stimuli-responsive robots, wireless control electronics, and intelligent devices.
研究领域:
材料科学
·
生物医学工程
·
机器人学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Qiu Fu,Ying Qin,Jingyuan Zhang,Weimin Guo,Kuo Zhang,Tianyuan Xiao,Xinjia Zhang,Jiang Chang,Lijian Sun
The potential dangers associated with UV and high-energy blue light (HEBL) exposure to human ocular health are increasingly attracting scholarly interest due to the escalating use of electronic devices. It is still a great challenge for materials to achieve efficient filtering of UV and HEBL while maintaining low haze and high transmittance. Herein, we reported a facile and green process for fabricating biodegradable and flexible gold ion (Au3+)-coordinated cellulose-based light filters with diverse UV- and HEBL-screening capacities via adsorption of Au3+. The incorporation of Au3+ results in superior UV- and HEBL-screening performance, especially almost 100% absorption of UVA and UVB. Meanwhile, the films could block 67.9–98.8% of HEBL in the 400–450 nm region. By absorption of light, these films can efficiently filter blue light emitted by lighting systems, computer and mobile phone screens. The films maintained exceptionally high transmittance (83.2–86.9%) and low haze (2.1–2.4%). Furthermore, the films exhibited stable UV and HEBL screening under thermal treatment or UV irradiation. Quite encouragingly, the incorporation of Au3+ facilitates films in achieving desirable flame retardancy, evidenced by a significant increase in the limiting oxygen index from 19.2% to 39.2%. Compared to the unaltered film, the films containing Au3+ demonstrate a marked decrease in peak heat release rate (PHRR) and total heat released (THR), with values declining from 203.8 to 15.5 W/g and 11.7 to 3.0 KJ/g, respectively. Our discoveries grant Au3+ a role in the realm of UV to blue light blocking, thus advancing the development of ion-based optical materials for the creation of antiblue light films and devices.
研究领域:
材料科学
·
光学材料
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Jiachen Guo,Zhiyuan Peng,Hu Wang,Liu Yang,Ling Zhang,Chunzhong Li
Facing the explosive growth of heat flux in microelectronic equipment, advanced thermal management materials should not only ensure the safe and stable operation of equipment, but also have the ability to withstand fire risks. Carbon materials such as graphene are subject to many restrictions in use due to their inherent high conductivity. Hexagonal boron nitride (h-BN) is often used to blend with polymers to prepare flexible thermal management materials due to its excellent electrical insulation and thermal conductivity. However, its further application is limited by its insufficient flame resistance and limited improvement of thermal conductivity at low filling levels. In this paper, urea-assisted ball milling is used to achieve the amination of boron nitride nanosheets (BNNS) and black phosphorus (BP), which creates the covalent bond between the filler and the cellulose. With the overlapping between small-size BP and large-size BNNS, the thermal conductivity, flame resistance, and mechanical properties of the film are significantly enhanced. Accordingly, the cellulose nanofiber (CNF)-based film has a high thermal conductivity of 42.29 W m–1 K–1 at 50 wt % loading (40 wt % BNNS-NH2 and 10 wt % BP-NH2), which is 777% higher than that of pure CNF. In addition, the peak heat release rate and total heat release of CBP10 decrease by 80.3 and 64.7%, respectively, compared with pure CNF, and the residue is more complete and denser, indicating that the film can effectively reduce and delay the fire hazard.
研究领域:
材料科学
·
热管理技术
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2023
·Vol. 25
·期 4
·1453-1463
·
IF 9.8
Chengling Huang,Hou-Yong Yu,Lumin Chen,Bin Xue,Yunfei Shen,Jiayuan Shen,Kam Chiu Tam
Following global trends in launching plastic bans driven by the increasing problem of non-degradable plastic polluting the environment, cellulose as an abundant natural polymer has gradually been exploited as an eco-friendly material. Nevertheless, there are two challenging problems to overcome: it is hard to dissolve and heat seal (self-bonding under heat and pressing) cellulose, which hinder cellulose materials from replacing plastic. Here, a binder-free method is proposed to realize the bonding of cellulose film without any other binders. The heat-sealable cellulose film was fabricated with a low bonding temperature of 78 °C and high transparency of 90%. Furthermore, glycerol and sorbitol were introduced in the cellulose film not only to reduce the brittleness of the films but also to assist the confined-solvent-driven process. Possible mechanisms of self-bonding and for the tunable concentration range of the residual solvent, which was crucial for the self-bonding, are reported. Additionally, a sealed cellulose-based band and bags were successfully made, indicating the potential of our heat-sealable cellulose films to overcome the inherent limitations of cellulose and boost the potential use of cellulose films as candidates to replace plastic.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wentao Gan,Yaoxing Wang,Shaoliang Xiao,Runan Gao,Ying Shang,Yanjun Xie,Jiuqing Liu,Jian Li
The architecture of cellulose nanomaterials is definitized by random deposition and cannot change in response to shifting application requirements. Herein, we present a magnetic field-controlled cellulose film derived from wood that exhibits great magnetic properties and reliable tunability enabled by incorporated Fe3O4 nanoparticles and cellulose nanofibers (CNF) with a large length-diameter ratio. Fe3O4 nanoparticles are dispersed in suspensions of CNF so as to enhance the magnetic response. The plane magnetic CNF can be processed to form a three-dimensional (3D) flower-like structure along the magnetic induction line after applying an external magnet. Inspired by the fluidic transport in natural flowers, a bilayer structure was created using the 3D flower-like film as the solar energy receiver and natural wood as the water pathway in a solar-derived evaporation system. Compared with a planar cellulose film decorated with Fe3O4, the 3D structure design can greatly improve the evaporation rate from 1.19 to 1.39 kg m–2 h–1 and the efficiency from 76.9 to 90.6% under 1 sun. Finite element molding further reveals that the 3D structural top layer is beneficial for the formation of a gradient temperature profile and the improvement of the energy efficiency through the reduction of thermal radiation. The magnetically controlled fabrication represents a promising strategy for designing cellulose nanomaterials with a complicated structure and controllable topography, which has a wide spectrum of applications in energy storage devices and water treatment.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
DOI
高影响因子
Waste and Biomass Valorization
·
2025
·
IF 2.8
Wang Shixing,Qiao Xiaolong,Zhang Yuanyuan,Chang Tao,Zhang Yuanming,Han Guangting,Ben Haoxi,Jiang Wei
The massive discharged of kenaf degumming wastewater posed severe environmental challenges due to its high solid waste content (more than 90% parenchyma cells (PCs) and a small number of fiber cells), yet current treatment strategies primarily focus on reducing chemical oxygen demand (COD) while neglecting the valorization of these solids. To address this gap, this study proposed a sustainable approach to repurpose PCs (abundant yet underutilized sheet structure lignocellulosic solid waste) into high-strength lignocellulose film. A hierarchical physical screening method was developed to isolate PCs from wastewater, followed by high pressure solid-liquid separation and filtration equipment to fabricate lignocellulose film. The natural sheet morphology of PCs (50–500 μm length and 25–250 μm width) facilitated dense brick-layer stacking, enabling exceptional dry strength (27.4 MPa) and modulus (4.84 GPa). Notably, the PCs film retained 30.28% dry strength (7.51 MPa) under wet conditions, outperforming conventional paper (14.32% retention). Further modification via nano-silica (NS) and 3-glycidyloxypropyltrimethoxysilane (GPTMS) enhanced interfacial interactions through hydrogen bonding and Si-O-C/Si-O-Si covalent grafting, achieving a tensile strength of 49.44 MPa (increase by 40%) and modulus of 6.72 GPa (increase by 39%). Thermal stability analysis revealed a maximum decomposition temperature of 354.41 °C, attributable to the synergistic effects of NS inorganic reinforcement and GPTMS crosslinking. Comparative evaluations against 8 commercial papers demonstrated excellent mechanical properties. This work pioneered the conversion of solid waste from kenaf degumming waste into functional cellulose films, offering a dual solution for pollution mitigation and sustainable material innovation in packaging.
研究领域:
材料科学
·
环境科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 3
·458
·
IF 3.164
Wei Wang,Baikai Zhang,Shuai Jiang,Huiyu Bai,Shengwen Zhang
The major challenge in preparing polymer nanocomposites is to prevent the agglomeration of inorganic nanoparticles (NPs). Here, with regenerated cellulose (RC) films as supporting medium, UV-shielding and transparent nanocomposite films with hydrophobicity were fabricated by in situ synthesis of CeO2NPs. Facilitated through the interaction between organic and inorganic components revealed by X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) characterization, it was found that CeO2NPs were uniformly dispersed in and immobilized by a cellulose matrix. However some agglomeration of CeO2NPs occurred at higher precursor concentrations. These results suggest that the morphology and particle size of CeO2and the corresponding performance of the resulting films are affected by the porous RC films and the concentrations of Ce(NO3)3·6H2O solutions. The optimized nanocomposite film containing 2.95 wt% CeO2NPs had more than 75% light transmittance (550 nm), high UV shielding properties, and a certain hydrophobicity.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）