INDUSTRIAL CROPS AND PRODUCTS
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2025
·
IF 6.2
Ruonan Zhu,Ming Yang,Jie Yin,Zheng Wu,Meiru Li,Lihong Zhao,Xingjie Wang,Junli Ren
In order to enhance enzymolysis saccharify, the impact of pretreating wheat straw with sodium carbonate (Na 2 CO 3 ) at moderate temperatures was investigated. The effects of pretreatment condition, for instance, reaction time (10–120 min) and temperature (75–105 °C) were investigated on delignification and polysaccharides (cellulose and hemicellulose) protection. It was found that the wheat straw effectively achieved the recovery of 82.67 %, 89.70 %, and 71.11 % for total sugar, cellulose, and hemicellulose respectively, and removed of 54.96 % lignin after pretreatment at the temperature of 90 °C with 4 % (w/v) Na 2 CO 3 for 120 min. After a 20 FPU enzymes saccharification for 72 h, the highest enzymatic digestibility of cellulose and xylan for pretreated residues were 81.8 % and 82.4 %, significantly higher than that of the raw material (16.48 % cellulose enzymatic digestibility, 8.43 % xylan enzymatic digestibility). The enzymatic hydrolysis results also demonstrated that the removal and polydispersity of lignin affected the conversion efficiency of the raw material, and delignification degree was positively correlated to enzymatic hydrolysis efficiency within a certain range. This pretreatment has potential for C6 and C5 sugars co-fermentation of wheat straw for biorefinery.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Luzhen Wang,Muqiu You,Jinhao Xu,Jing Zhou,Yongcan Jin,Dagang Li,Zhaoyang Xu,Junshuai Li,Chuchu Chen
Hydrogels are soft and wet materials, but their applications are always limited by insufficient mechanical strength and toughness, and they are prone to freezing at low temperatures. In this study, we introduced an eco-friendly approach to developing wood-based hydrogels reinforced by the naturally aligned wood skeleton (WS) through the Hofmeister effect. The resulting wood-based composite hydrogels exhibited a high tensile strength of 20 MPa and a strain of 35 % in the longitudinal direction. This impressive mechanical performance was primarily due to densely packed hydrogen bonding, physical entanglements, and van der Waals forces between the cellulose of WS, polyacrylamide (PAM), and poly(vinyl alcohol) (PVA) chains during polymerization. Notably, the polymerization was induced using wood carbon dots as initiators, imparting additional fluorescence features to the hydrogels. Afterward, by incorporating a metal salt (sodium chloride), the developed wood-based hydrogels maintained high conductivity (3.0 S/m) and mechanical properties even under low-temperature conditions (−20 °C). Moreover, the conductive hydrogels exhibited multifunctional sensing capabilities, including strain, temperature, and ultraviolet (UV) irradiation detection, making them highly suitable for applications in human motion monitoring and healthcare, particularly under harsh environmental conditions.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Xingtong Gao,Kai Liu,Wenjin Hu,Aixiang Li,Zijian Lyu,Haiqiang Chen,Hu Zhu
Currently, the incidence of kidney failure is increasing worldwide. Hemodialysis is the main method for the treatment of kidney diseases, and the continuous development of new hemodialysis membranes is the key to improve the treatment effect and the quality of life of patients. In this study, heparinized multi-walled carbon nanotube/cellulose acetate (Hep/MWCNTs@CA) membranes were prepared by non-solvent induced phase separation (NIPS). The morphology and pore structure of Hep/MWCNTs@CA membranes were characterized by scanning electron microscopy (SEM). The elongation at break and tensile strength of the membranes were characterized by a mechanical property universal tester. The results showed that mechanical properties of 0.1 wt% MWCNTs enhanced the membrane is best. The water contact angle test confirmed that MWCNTs can improve the membrane hydrophilicity, and combined with the adsorption test results for proteins, it was found that the hydrophilicity can reduce the adsorption of proteins to the composite membrane and improve the blood compatibility of the material. The dialysis performance of urea and lysozyme was tested by a self-made simulated hemodialysis device, and the clearance rates of urea and lysozyme were 84% and 47.2%, respectively, which showed that the interfacial gap between MWCNTs and CA matrix can make the composite membrane retain a high retention rate of macromolecular proteins (92.3%) and further improved the clearance rate of small and medium molecular toxins. In addition, the good blood compatibility and biocompatible properties of the materials were confirmed by hemolysis, recalcification and cytotoxicity tests on Hep/MWCNTs@CA membranes. In conclusion, the prepared Hep/MWCNTs@CA holds great potential for application in the field of hemodialysis.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xuanxuan Huang,Rui Huang,Qian Zhang,Zhaohong Zhang,Jinlong Fan
Plastic pollution, UV radiation and food spoilage have attracted widespread public attention, which will pose a serious threat to the global environment and human health. Therefore, the preparation of renewable, degradable, environmentally friendly packaging materials with antimicrobial activity and UV-shielding properties is urgent. In this work, we describe a simple strategy for the preparation of antimicrobial and UV resistant composite films. Specifically, silver nanoparticles (AgNPs) were synthesized in situ on the surface of cellulose oxide (TOCN) using a one-pot method, and then the folic acid (FA) modified TOCN was blended with silver loaded cellulose oxide (TOCN@AgNPs), and the films were prepared using a vacuum-assisted filtration device. The experimental results showed that the film inhibited both Staphylococcus aureus and Escherichia coli, and at the same time, the film had excellent UV-shielding properties and mechanical strength. Therefore, the film will be an ideal candidate for replacing plastics and extending the shelf life of food. In addition, the method is expected to reduce the environmental impact of plastics.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Fang Yuan,Xiangyang Lan,Fuguang Ban,Yanchun He,Meiqing Wei,Chunyan Wang,Xuezhu Xu,Haohe Huang,Chongxing Huang
Deep eutectic solvents (DESs) have gained increasing attention owing to their effectiveness in extracting lignin from biomass. This study aims to investigate the mechanism of selective extraction of lignin from bagasse by adjusting the ratio of oxalic acid (OA) to lactic acid (LA) within a choline chloride (ChCl)-based ternary DES. The objective is to obtain bagasse cellulose and lignin of different qualities. The experimental results indicated that incorporating OA into the ChCl/LA DES system successfully reduced the lignin content in bagasse cellulose from 16.51 wt% to 8.75 wt% and generated bagasse with a more uniform morphology. This study also examined how ratio variations in the ternary DES influenced the molecular weight, degree of polymerization (DP), and elemental/structural compositions of both lignin and bagasse cellulose, thereby providing insights into the underlying mechanisms. The excessive amounts of OA tended to break the β-O-4 bond within lignin and disrupt fiber uniformity. Overall, this study investigated the roles of different components in the ternary DES in producing wood fiber materials of various qualities, providing a theoretical basis for the comprehensive utilization of cellulose materials.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yile Fu,Zina Wang,Tian Tian,Guan Li,Jinghua Gu,Jun Zhou,Sheying Dong
Despite the promising potential of zeolitic imidazole framework-8 (ZIF-8) for dye adsorption, addressing challenges such as aggregation and recycling difficulties remains essential. Herein，a novel three dimensional (3D) carboxymethyl cellulose (CMC), graphene oxide (GO) and ZIF-8 hybrid aerogel (CGZ-3) was prepared via blending ZIF-8 into the CMC-GO matrix. The structure and composition of CGZ-3 were characterized by SEM, FT-IR, TG and XPS. Adsorption experiments were conducted to optimize various parameters affecting the behavior of methylene blue (MB) adsorption. The composite aerogel exhibited an obvious lamellar network structure, with a surface rich in oxygen-containing functional groups such as -OH and -COOH. CGZ-3 demonstrated a rapid adsorption rate for MB, achieving a removal efficiency of 96% within 15 minutes. The entire adsorption process was spontaneous and endothermic, consistent with the pseudo-first-order kinetic model and Langmuir adsorption isotherm model. The maximum theoretical adsorption capacity was 427.35 mg/g at 298 K. Selective adsorptions tests demonstrated high selectivity of the composite aerogel for MB, and dynamic adsorption further confirmed the exceptional adsorption capacity of CGZ-3. After five cycles of adsorption-desorption, the MB removal rate remained above 95%, with an adsorption capacity exceeding 240 mg/g, highlighting the stability and reusability of CGZ-3. Collectively, the CGZ-3 would be a potential material for the adsorptive removal of MB in practical water treatment.
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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.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qin Shi,Jialve Zhang,Zhenjie Duan,Yanqing Wang,Yumin Wu,Yuetao Liu
With the rapid development of science and technology, the discharge of industrial wastewater, especially dye wastewater, has caused great harm to the ecological environment. In response to the pollution caused by cationic organic dyes in industrial wastewater, this study employed free radical polymerization to prepare a new hydrogel adsorbent, PAA-PA-CMC, which exhibits both reusability and a large adsorption capacity. Phytic acid (PA) and carboxymethyl cellulose (CMC) were introduced into the acrylic acid-based polymer network using N, N ‘-methylene-bisacrylamide (MBA) and glycidyl methacrylate (GMA) as cross-linking agents. Phytic acid serves as both a cross-linking agent and an active component in the adsorption of methylene blue cationic dyes. Methylene blue (MB) adsorption experiments demonstrated that PAA-PA-CMC possesses a porous structure and abundant functional groups, primarily utilizing hydrogen bonds and electrostatic interactions for efficient MB adsorption. The adsorption capacity of PAA-PA-CMC for MB can reach 1005.41 mg/g and has good reusability. After 5 cycles, its adsorption efficiency remains at about 85 %. The adsorption behavior of PAA-PA-CMC conforms to the pseudo-second-order kinetic model and the Langmuir isotherm adsorption model, which is a monolayer chemical adsorption. In summary, the PAA-PA-CMC hydrogel prepared in this investigation shows great potential for treating MB dye wastewater.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Qingtian Xu,Jierui Ye,Shuaibo Han,Yuebing Gao,Pan Chen,Siqun Wang,Qiang Wu,Qian Li
Renewable polymeric microcapsules hold promise for precisely controlled release of hydrophobic drugs (curcumin) in therapeutic treatment. However, there still remains challenges to stabilize the properties of microcapsules and to enhance encapsulation efficiencies of curcumin. By using an eco-friendly ternary deep eutectic solvent here, we successfully fabricated native cellulose nanofibrils, holocellulose nanofibrils, and lignocellulose nanofibrils containing both phytates and sulfate groups. In addition, a novel type of curcumin-loaded polymeric microcapsules with diameter of 10–20 μm were prepared by cellulose nanofibrils as stabilizing agents in Polylactide Pickering emulsion. The Pickering emulsions stabilized by P/N/S-containing cellulose nanofibrils, holocellulose nanofibrils, and lignocellulose nanofibrils are more stable than the unmodified cellulose nanofibrils-stabilized emulsion. The Pickering emulsion stabilized by 0.2 wt% P/N/S-containing lignocellulose nanofibrils exhibited the highest emulsion layer height and the zeta potential reached −39.74 ± 2.88 mV. Moreover, the highest encapsulation efficiency of curcumin can be up to 94.80%. Antimicrobial test revealed that curcumin in the polymeric microcapsules exhibited an excellent inhibitory effect on S. aureus and the antibacterial efficiency reached 98.66%. These results provided important information on the comparison of different cellulose nanofibrils-stabilized Pickering emulsions and the application of controlled release of curcumin incorporated polymeric microcapsules in drug delivery system.
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NANOTECHNOLOGY
·
2024
·Vol. 35
·期 13
·135601
·
IF 2.9
Yifan Yuan,Hongyou Chen,Liangkui Peng,Yingqi Liu,Jin Zou,Lu Cheng,Ying Wang,Xin Xia,Huimin Zhou
Flexible solid-state zinc–air batteries as a wearable energy storage device with great potential, and their separators, which control ion permeability, inhibit zinc dendrite generation, and regulate catalytic active sites, have been developed as gel electrolyte separators with high retention of electrolyte uptake. However, the gel electrolyte separator still has problems such as poor affinity with the electrolyte and poor ionic conductivity, which limits its further application. In order to further improve the electrolyte absorption, ionic conductivity and mechanical strength of cellulose acetate(CA)/polyvinyl alcohol (PVA) nanofibers, TiO2 was added to CA/PVA to increase the porosity, and glutaraldehyde (GA) was used to modify the CA/PVA/TiO2 separator by acetal reaction with CA and PVA to make the molecules closely linked. The results shows that the optimal mass fractions of TiO2 and GA were 2% and 5%, respectively. At this time, the porosity and absorption rate of the separator increased from 48% to 68.2% and 142.4% to 285.3%, respectively. The discharge capacity reached 179 mA cm−3, and the cycle stability rate was 89% after 7 stable constant current charge/discharge cycles.
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REACTIVE & FUNCTIONAL POLYMERS
·
2024
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IF 4.5
Ai Liu,Xianghong Li,Wenbiao Xu,Xixin Duan,Junyou Shi,Xiangyu Li
A lignin-embedded nanocellulose (LCNC) hydrogel, derived from repurposed wheat straw biomass, was fabricated through a ZnCl 2 -mediated soaking process. This innovative hydrogel leverages acrylamide/acrylic acid (AM/AA) monomers as a polymerizable deep eutectic solvent (PDES), enhancing its structural integrity. Notably, the hydrogel exhibits remarkable properties, including a minimal water loss rate of less than 5 %, a peak compressive stress of 0.28 MPa, Young's modulus of 0.015 MPa, a minimum impedance of 500 Ω, and an impressive conductivity of 8.0 × 10 −4 S/m. Furthermore, when integrated into a sensor, it demonstrates a sensitivity factor (GF) of 0.08 KPa −1 . Selecting this advanced hydrogel as the foundation for a piezoresistive stress sensor, we investigated its capability to detect subtle bodily motions. Our findings underscore the sensor's remarkable versatility; it not only promptly registers significant arm and wrist movements but also meticulously captures delicate throat movements during swallowing, finger flexion, and even the weight distribution when gripping heavier objects. This (PAM-PAA)/LCNC/SA-Zn 2+ hydrogel-based sensor holds immense potential for many applications, including wearable technology, smart devices, health monitoring systems, and human motion recognition platforms. Its ability to accurately track and interpret a range of bodily movements and pressures underscores its significance in advancing the field of personal health tracking and interactive technologies.
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JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Guoqiang Zhang,Xilin Rong,Wenyi Huang,Zhenfang Xiao,Ziran Xue,Hao Cheng,Jun Feng,Lijun Li
Global environmental pollution has motivated the development of environmentally friendly photocatalysts. In this study, we successfully synthesised a carboxylated nanocarbon aerogel (NCA) as a substrate and loaded zinc oxide nanorods (ZnO NRs) onto NCA using a hydrothermal method. NCA/ZnO-1, NCA/ZnO-2, and NCA/ZnO-3 were prepared by adding different amounts of NCA and were used for the photocatalytic degradation of methyl orange (MO) dye under UV or visible light and then fully characterized. The NCA was found to have a graphitic carbon-laminate structure, which leads to a reduced NCA/ZnO bandgap and enhanced charge-carrier separation and transport. In addition, the porous carbon structure of NCA reduces the stacking density of the ZnO NRs so that they are well dispersed, providing more active sites, thereby improving the photocatalytic performance of NCA/ZnO. The catalytic degradation of MO using NCA/ZnO showed a significantly enhanced photocatalytic effect and better recyclability than ZnO alone. The complete degradation of MO by NCA/ZnO-2 under UV and visible light at pH = 9 took only 30 and 120 min, respectively, and the recovered NCA/ZnO-2 still had a catalytic performance of 99 % after recycling five times. This study provides new design ideas for the fabrication of three-dimensional semiconductor photocatalysts doped with carbon materials and opens a new path for renewable energy in combination with semiconductor applications.
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