ACS Sustainable Chemistry & Engineering
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2023
·
IF 8.4
Gaojian Zhu,Jie Wang,Xiaotong Wang,Yuqian Liu,Weibing Wu,Huining Xiao,Liulian Huang,Hongqi Dai,Xuelian Zhou,Huiyang Bian
Microplastics pollution in the aquatic environment has been considered as a particular concern for global ecosystems in recent years. Herein, bleached eucalyptus pulp was chemically modified by 2,2,6,6-tetramethylpiperidine-1-oxyl and 2,3-epoxypropyltrimethylammonium chloride to produce modified cellulose nanofibrils (CNFs). Then, porous CNF-based aerogels were prepared by the freeze-drying process and selected as a matrix filter for highly efficient separation of polystyrene microplastics (PSMPs). Results showed that the modified CNF aerogels could efficiently separate different types of PSMPs with filtration efficiencies of 100 and 75% for carboxylate-modified polystyrene (PS–COOH) and amine-modified polystyrene (PS–NH2), respectively. Meanwhile, the hydrophilicity and porous structure of these materials endowed aerogels with high filtration flux. The excellent filtration performance of materials mainly relied on their microstructure and high surface charge, which could effectively capture and separate PSMPs from aqueous solution through the synergistic actions of physical entrapment, electrostatic interaction, and hydrogen bonding. In addition, the modified aerogels had good stability and reusability, and the filtration efficiency of PS–COOH remained at 100% after eight cycles. These findings provide a green and promising method for designing functional aerogel filters from sustainable resources to be used for applications in microplastics separation and water purification.
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PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Shuang-Mei He,Fang Wang,Lin Zhang,Jia-Yan Zhang,Fu-Rong Zeng,Bo-Wen Liu,Yan-Bing Luo,Yu-Zhong Wang,Hai-Bo Zhao
Cellulose-based paper is widely used in cultural communication, art appreciation, and cultural relic protection, but is susceptible to fire and mildew. Traditional protective materials have negative impacts on the appearance, flexibility, and writability of paper, resulting in severely limited applications. Herein, we demonstrate a quick and effective approach for enhancing the flame retardancy, antibacterial, and antifungal properties of cellulose papers by assembling polyhexamethylene biguanide (PHMB) and sodium polyphosphate (PSP). By exploiting hydrogen bonding and electrostatic interactions , PHMB and PSP can assemble into micro-nano protuberances that are deposited on the surface of the paper through a 30 s dip-treating technology. The PHMB/PSP layers promote the formation of char layer when exposed to flame, providing the paper with self-extinguishing property with a limiting oxygen index value of 34.5 % and an 84.0 % reduction in peak heat release rate. Meanwhile, the treated papers exhibit excellent antibacterial activity against S. aureus (>99.99 %) and appreciable fungal resistance against T. viride (Grade 1). Importantly, the treatment does not alter the appearance, mechanical stability, and writability of the paper. Owing to the mild conditions and fast processability, this study promotes the wide development of advanced high-performance cellulose paper with combined fire-safety, antibacterial, and antifungal properties for diverse applications.
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Sustainability
·
2023
·Vol. 15
·期 18
·13382
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IF 3.9
Qihang Dai,Ju Liu,Junjie Zheng,Bo Fu
Metal–organic frameworks (MOFs) hold great potential for efficient removal of particulate matter (PM) due to their high porosity and tunable surface groups. In this work, sustainable bacterial cellulose (BC) was employed as a substrate for Zr-based MOF (i.e., UiO-66-NH2) deposition. Specifically, the UiO-66-NH2@BC aerogel exhibits a multi-level pore structure with a specific surface area of 103 m2/g. Pristine BC aerogels indicated a removal efficiency of 50.6% for PM2.5, with a pressure drop of 22.8 Pa. While UiO-66-NH2@BC aerogels showed a PM2.5removal efficiency of 96.9%. The filtration mechanism can be assigned to the following reasons: (i) the interception/impaction of PM with the fibrous and porous aerogel network; and (ii) the presence of polar amine groups that boost electrostatic interactions between PM and MOFs. Moreover, as-prepared filters can be regenerated in a facile way with good reusability and long-term stability.
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CARBOHYDRATE POLYMERS
·
2021
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IF 9.381
Dandan Zhang,Huiming Liu,Mingjie Chen,Qian Wang,Jin Feng,Xiulin Shu,Cailing Li,Yulian Li,Xiaobao Xie,Qingshan Shi
Inspired by antimicrobial peptides (AMP) which could alleviate drug resistance pressure, antimicrobial peptide mimics (AMPMs) were designed timely. Here, carboxymethyl cellulose (CMC) -based AMPMs were constructed by introducing different diamines on CMC effectively. Firstly, CMC was degraded to be oligomers with different molecular weights, followed by amination reactions with different diamines respectively. After protonation, a series of AMPMs with different structures were synthesized successfully. Their antibacterial effect has been evaluated by dynamic growth curves and microdilution method. The images snapped by the confocal laser scanning microscope and transmission electron microscope have fully proved its great lethality. And the antibacterial mechanism measured by flow cytometry analysis and zeta potential detection demonstrated that the destruction of membrane potential leads to bacteria death. The excellent blood compatibility and negligible drug resistance has also been confirmed. In addition, the synthesis method is simple and environmental-friendly.
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SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Luyu Yang,Xuran Xu,Mengdi Liu,Chen Chen,Jian Cui,Xiao Chen,Kai Wu,Dongping Sun
Herein, using three-dimensional interconnected bacterial cellulose (BC) as substrate, we prepare a wearable polyaniline (PANI)-based ammonia sensor via co-doping method with sulfosalicylic acid (SSA) and poly(2-acrylamido-2-methyl-1-propane sulfonic acid) (PAMPS). The introduction of SSA is intended to improve the intrachain carrier mobility of PANI, while the simultaneous doping of PAMPS is responsible for efficient interchain charge transfer, resulting in a significant synergy in carrier mobility and sensitivity enhancements. Moreover, with high specific surface area and 3D network, BC substrate is beneficial to enhance the contact area with detected gas as well as the mechanical tolerance during the practical utilization. Consequently, our PANI-SSA/PAMPS-based sensor performs a high response (21.3 for 50 ppm ammonia), quick response and recovery time (4.1 s/16 s). Furthermore, the sensor also demonstrates excellent ammonia selectivity among different interfering agents, with a lower detection limit (LOD) of 10 ppb at room temperature , and the limit sensing temperature even below -10 °C. Our work provides more opportunities for the design of flexible gas sensor in sensing application.
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CELLULOSE
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2021
·Vol. 28
·期 5
·2879-2888
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IF 5.044
Li Chang,Ju Benzhi,Zhang Shufen
The synthesis of the first cellulose-based vitrimer is described. Dynamic ester bonds were responsible for the dynamic properties of carboxymethyl cellulose (CMC)-based vitrimer. The addition of suitable catalyst and glycerol in the vitrimer formulations was crucial for the reprocessability of these materials. Thermogravimetric and dynamic mechanical analyses tensile strength tests were performed to investigate the effect of the catalyst and glycerol on the thermal stability and mechanical properties of the materials. A minimum amount of 5 mol% of 1,5,7-triazabicyclo[4.4.0]dec-5-ene with respect to the carboxyl group content was required to maintain reprocessability by hot press. The CMC vitrimer exhibited good reprocessability and shape memory ability. Our work demonstrates that cellulose, the most abundant bio-resource on the planet, can be a promising raw material for bio-based vitrimer due to its excellent renewability and low cost. Graphic abstract
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2021
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IF 6.789
Qianqian Yu,Zishuai Jiang,Yuan Yu,Haiyue Yang,Xiaohan Sun,Chengyu Wang,Shih-Hsin Ho
Membrane is a considerable precursor for emulsions separation and organic dyes degradation used in water purification and oil reclamation. However, the tedious preparation method, the surface smears easily, and low degradation efficiency, these characteristics usually significantly hinder its applicability toward wastewater governance . Herein, a green, facile, and efficient fabrication strategy to prepare a bi-functional palladium nanoparticles (PdNPs)-loaded bacterial cellulose membrane (BCMPd) is proposed. A tri-functional bacterial cellulose membrane (BCM) was obtained by percolating bacterial cellulose (BC) on a basal membrane, and BCM served as a support, reducing agent, and stabilizer in the subsequent reduction of PdNPs. Bi-functional BCMPd was successfully obtained and used for continuously removing emulsions and reducing methylene blue (MB) from simulated wastewater via the integration of physical sieving and chemical reaction. Meanwhile, the enhancement factors for the water transfer ability and demulsification capacity correlated directly with the wettability and surface structure of BCMPd. Furthermore, the dosage of BC was adjusted to reveal the mechanism for the enhanced water transferability and demulsification capacity. Notably, PdNPs of BCMPd decreased Fermi potential difference between BH 4- and MB, accelerating the electron transfer of the reduction reaction and thus exhibiting a remarkable MB degradation efficiency. Together, the information obtained in this work can be useful for comprehensively addressing the bottleneck of forming a cost-effective, eco-friendly, and bi-functional membrane reactor , providing an alternative approach for better treatment of complex wastewater.
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APPLIED SURFACE SCIENCE
·
2021
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IF 6.707
Xiaohan Yang,Hanbin Liu,Liwei Qian,Qingjun Meng,Haiwei Wu,Zhijian Li,Hongwei Zhou
The remediation of water that polluted by organic dyes and nanoparticles (NPs) remains a great challenge. However, second pollution of solid waste may produce if the adsorbents are not degradable or recyclable. The stimuli-responsive materials were regarded to be able to resolve this problem by reversible adsorption-desorption under stimuli. Here in this work, the surface of cellulose fibers was modified with CO 2 -responsive molecules through a simple esterification followed by an aza-Michael addition reaction. The chemical structure was confirmed with Fourier transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS), x-ray diffractometer (XRD) and thermal analysis. The gas-responsiveness was demonstrated by monitoring of the pH, conductivity and surface zeta potential. Anionic dyes and negative charged NPs in water can be selectively and reversibly captured by the CO 2 -responsive surface on cellulose fibers, suggesting the inexpensive, readily available and smart cellulose fibers may find great potential in water remediation.
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JOURNAL OF MOLECULAR LIQUIDS
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2021
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IF 6.165
Yanling Wang,Yongfei Li,Qian Wang,Lei Liang,Longhao Tang,Chuanbao Zhang,Jincheng Lan,Lingtao Meng,Baoyang Jiang
In gas condensate reservoirs, liquid condensation near the wellbore region can break gas well deliverability when the pressure drops lower than dew point . Gas-wetting alteration is one of the potential approaches to overcome the difficulty. However, gas production remains restricted because the wettability of the core surface can only be altered from original liquid-wetting to neutral gas-wetting by traditional methods. Herein, fluorine-modified nanocrystalline cellulose is developed to achieve super gas-wetting alteration, increasing the contact angles of brine and decane on core surface from 22° and 0 o to 153° and 142°, respectively. This product not only reduces the surface free energy from 68.41 mN/m to 0.35 mN/m but also increases the surface roughness from 68.23 nm to 154.51 nm. The capillary tube and imbibition experiments further confirm that the wettability of the core surface has been altered from strong liquid-wetting to super gas-wetting. This result indicates that the liquid is easier to peel from the core surface to improve the ability of transportation and distribution. Besides, after the super gas-wetting alteration, the required pressure for displacement is reduced and the core permeability is restored dramatically. Meanwhile, it has been proved that fluorine-modified cellulose is more suitable for unconventional low permeability reservoirs. This work also reveals the mechanism of super gas-wetting alteration in detail, which will expand the better application of the material in more oilfields and other mining engineering developments.
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Materials Science & Engineering C-Materials for Biological Applications
·
2021
·
IF 7.328
Ofaira Azhar,Zaib Jahan,Farooq Sher,Muhammad Bilal Khan Niazi,Salik Javed Kakar,Muhammad Shahid
Hemodialysis considered as therapy of end-stage renal disease (ESRD) for the separation of protein and uremic toxins based on their molecular weights using semi-permeable membranes. Cellulose Acetate (CA) hemodialysis membrane has been widely used in the biomedical field particularly for hemodialysis applications. The main issue of CA membrane is less selectivity and hemocompatibility. In this study, to enhance the filtration capability and biocompatibility of CA hemodialysis membrane modified by using Polyvinyl Alcohol (PVA) and Polyethylene Glycol (PEG) as additives. CA-PVA flat sheet membranes were cast by phase inversion method, and separation was done by dead-end filtration cell. The synthesized membranes were described in terms of chemical structure using Fourier Transform Infrared Spectroscopy (FTIR) and morphology by Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), pure water flux, solute permeation, and protein retention. Biocompatibility of the membranes was tested by the platelet adherence, hemolysis ratio, thrombus formation, and plasma recalcification time. SEM images exposed that the CA-PVA membrane has a uniform porous structure. 42.484 L/m 2 h is the maximum pure water flux obtained. The CA-PVA rejected up to 95% of bovine serum albumin (BSA). A similar membrane separated 93% of urea and 89% of creatinine. Platelet adhesion and hemolysis ratio of casted membranes were less than the pure CA membrane. Increased clotting time and less thrombus formation on the membrane's surface showed that the fabricated membrane is biocompatible. CA-PVA hemodialysis membranes are more efficient than conventional reported hemodialysis membranes. It revealed that CA-PVA is high performing biocompatible hemodialysis membrane.
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POLYMER BULLETIN
·
2021
·Vol. 79
·期 2
·1201-1216
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IF 2.87
Yu Changjiang,Li Han,Ma Haoyue,Zhang Limei,Li Yu,Lin Qiang
A magnetic composite microsphere, calcium alginate (CA)/carboxymethyl cellulose (CMC)@MnFe 2 O 4, was prepared using CA and CMC encapsulated MnFe 2 O 4 through blending and cross-linking for the removal of Cu(II) from aqueous solution. The CA/CMC@MnFe 2 O 4 was characterized in detail by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and X-ray phosphorescence spectroscopy. In addition, various adsorption conditions including the initial pH of Cu(II) solution, equilibrium contact time, and initial Cu(II) concentration were tested. The adsorption data fit better to the Langmuir isotherm and follow the pseudo-second-order model, suggesting that it is a monolayer adsorption process with chemisorption as the rate-limiting step. The maximum adsorption capacity of the CA/CMC@MnFe 2 O 4 was 77.22 mg g −1 at 25 ℃ and pH 5. Cu(II) removal mechanisms of CA/CMC@MnFe 2 O 4 follow ion exchange as well as the formation of complexes as evidenced based on the microstructure analysis and adsorption data fitting.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Yue Jiao,Ya Lu,Kaiyue Lu,Yiying Yue,Xinwu Xu,Huining Xiao,Jian Li,Jingquan Han
Hypothesis Hydrogel-based sensors have attracted considerable attention due to potential opportunities in human health monitoring when both mechanical flexibility and sensing ability are required. Therefore, the integration of excellent mechanical properties , electrical conductivity and self-healing properties into hydrogels may improve the application range and durability of hydrogel-based sensors. Experiments A novel composite hydrogel composed of polyaniline (PANI), polyacrylic acid (PAA) and 2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO)-oxidized cellulose nanofibrils (TOCNFs) was designed. The viscoelastic, mechanical, conductive, self-healing and sensing properties of hydrogels were studied. Findings The TOCNF/PANI/PAA hydrogel exhibits a fracture strain of 982%, tensile strength of 74.98 kPa and electrical conductivity of 3.95 S m −1 , as well as good mechanical and electrical self-healing properties within 6 h at ambient temperature without applying any stimuli. Furthermore, owing to the high sensitivity of the TOCNF/PANI/PAA-0.6 hydrogel-based strain sensor (gauge factor, GF = 8.0), the sensor can accurately and rapidly detect large-scale motion and subtle localized activity. The proposed composite hydrogel is as a promising material for use as soft wearable sensors for health monitoring and smart robotics applications.
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