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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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Ying Chen,Xin Liu,Rui Zhou,Jiaxian Qiao,Jiating Liu,Rong Cai,Jiaxian Liu,Jingjing Rong,Yi Chen
High adsorption capacity, high adsorption rate and reusable adsorbents are urgent needed for removing heavy metals from wastewater. In this study, porous sodium alginate/cellulose nanofiber (SA/CNF) composite hydrogel microspheres were prepared by combining sodium alginate with cellulose nanofibers by microfluidics technology and adding polyethylene glycol (PEG) as pore making agent. The SA/CNF composite hydrogel microspheres could efficiently adsorb heavy metals (Pb 2+ , Cu 2+ and Cd 2+ ) in wastewater. The influencing factors of adsorption process, including pH, temperature, initial concentration, coexisting ions and aquatic environments, were systematically discussed. The adsorption process was more consistent with Langmuir isotherm model and pseudo-second-order model in batch system, indicating the adsorption process was mainly chemical adsorption. The adsorption capacity to Pb 2+ obtained by Langmuir model was as high as 544.66 mg/g at 20 °C. Fixed-bed column adsorption experiments demonstrated the excellent performance of the as-prepared SA/CNF microspheres for treatment of the flowing wastewater in a column system. Overall, a highly practical adsorption process based on hydrogel adsorbents was developed for the removal of heavy metals from actual wastewater.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Gewen Su,Peiqing Jiang,Liyun Guo,Huawei Zhang,Xinyu Cheng,Huapeng Zhang
Bio-based aerogels are sustainable and eco-friendly materials that have gained increasing attention. However, their development is hindered by complex technological processes and unsatisfactory mechanical properties. To obtain a multi-scale hierarchical micro-meso porous composite aerogel with extraordinary thermal insulation and mechanical properties via simple and facile preparation process, we used oxidized cotton linter fiber (CF) as the skeleton and reinforcement, oxidized microcrystalline cellulose (MCC) as the supporting and filling matrix, and PVA as the crosslinking agent and a good glue to enhance the interaction between CF and MCC, and the porous network of the composite aerogel. The composite aerogel is very light, strong, and flexible. The best obtained composite aerogel has a apparent density of only 67.5% of the pure cotton fiber composite aerogel (CF 0 ), a maximum compressive stress of 1.22 MPa, which is 22 times higher than the pure microcrystalline composite aerogel (MCC 0 ), and a thermal conductivity of 0.0335 W/m.K, which is 89% lower than CF 0 . These properties make the composite aerogel suitable for various thermal insulation applications, such as protective clothing for extremely cold environment.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Weijie Lin,Dengwen Ning,Dezhong Xu,Shuai Wu,Qiuxia Zou,Ajoy Kanti Mondal,Fang Huang
This study compares the behavior of combined and free lignin on the cellulose enzymatic hydrolysis (EH). The combined lignin refers to the lignin naturally existed in the lignocellulose and the free lignin refers to the cellulolytic enzyme lignin. Three kinds of lignocelluloses (i.e., Moso bamboo, horsetail pine and aspen) are chosen for the research. Lignin is mainly biosynthesized of guaiacyl (G), syringyl (S), and p -hydroxyphenyl (H) structural units. The HSQC NMR analysis shows that the free lignin of Moso bamboo, horsetail pine and aspen are mainly composed of G-S-H, G-H and G-S type lignin units, respectively. Furthermore, a blood glucose meter (BGM), UV and fluorescence spectrophotometer are used to determine the cellulose conversion, enzyme adsorption and fluorescence intensities in the EH. It shows that the combined lignin has a weaker inhibitory effect on the EH breakdown than the free lignin. The influence of EH follows the order of Moso bamboo > aspen > horsetail pine. This study can be applied to the development of theoretical guidelines for mitigating the residual prohibition of lignin in the lignocellulose EH.
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POLYMER COMPOSITES
·
2024
·
IF 4.8
Zhongyuan Xie,Xinyu Li,Qiyuan Zhang,Hua Jiang
Currently, toughening poly(lactic acid) (PLA) without reducing its strength and modulus is still challenging. Fortunately, this problem could be addressed by incorporating cellulose nanocrystals grafted with epoxidized soybean oil (CNCs-g-ESO) into the PLA matrix. The percolation threshold for uniform dispersion of the CNCs-g-ESO in the PLA matrix was about 0.8 wt%. The loading made the elongation at break and tensile fracture energy of the PLA composite film increase to 26.5 and 11.26 from 3.7% and 0.96 MJ.m −3 , respectively, concerning the neat PLA. Meanwhile, it also resulted in a 4.7% and 12.4% increase in the tensile strength and Young's modulus, respectively. Additionally, the initial decomposition temperature (T 5% ) of the PLA composite increased to 334.9 from 316.1°C after incorporating the CNCs-g-ESO. Therefore, the CNCs-g-ESO, acting as an ESO-like plasticizer and a CNCs-like nucleating agent, is a potential nanofiller for reinforcing and toughening PLA. Highlights Cellulose nanocrystal grafted with epoxidized soybean oil (CNCs-g-ESO) The CNCs-g-ESO acting as both plasticizer and nucleating agent The CNCs-g-ESO decreasing the spherulite size, but increasing the CrI of PLA The CNCs-g-ESO enlarging the window for thermal process of PLA Simultaneous reinforcement and toughness of PLA
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuxin Zhu,Ting Zhang,Hong Liu,Chenkai Jin,Chengqi Feng,Juncheng Huang,Haining Na,Jin Zhu
The preparation of stable and efficient cellulose-based oil/water separation membranes is of great significance in solving the problem of industrial oily wastewater. Herein, rod-like hydroxyapatite (HAP) modified microfibrillated celluloses (MFCs) are used to form the fibrous framework to produce a microporous PDMS-MFC-HAP membrane. The membrane shows good superhydrophobicity with a water contact angle of 151.6°. It exhibits the oil-water separation performance for various water-in-oil emulsions. The separation flux of the membrane is up to 3665.3 L·m −2 ·h −1 ·bar −1 under 0.5 bar pressure with a separation efficiency of over 99.6 %. The PDMS-MFC-HAP membrane could maintain a high separation efficiency of 98.6 % after 20 cycles. This study provides a simple and effective method to fabricate cellulose-based superhydrophobic membranes, which have a greater potential to achieve oil-water separation for oily wastewater treatment with high efficiency.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xianxian Wang,Xinyu Feng,Qing Li,Zheqin Dong
Cellulose membranes (CMs) are garnering significant interest in water purification due to their abundant, renewable, and biodegradable properties. Surface functionalization of CMs provides a promising avenue to equip them with diverse functionalities, thus expanding their application spectrum. In this study, we introduce a simple, efficient, and versatile method for CM functionalization, utilizing silanization and thiol–ene chemistry. We demonstrate that these reactions proceed rapidly within minutes, endowing the origin CMs with various functional groups including perfluoroalkyl, thiol, and amino groups. We then explore the distinct properties and potential applications of the three functionalized CMs. The perfluoroalkyl-functionalized membranes display superhydrophobicity with a water contact angle of 154° and show excellent separation efficiency for various water-in-oil emulsion. The thiol-functionalized membranes exhibit strong adsorption capacity for the heavy metal Pb2+, coupled with satisfactory reusability. Lastly, the amino-functionalized membranes, quaternized with benzyl bromide, exhibit robust antibacterial properties against both Gram-negative (Escherichia coli) and Gram-positive bacteria (Staphylococcus aureus). We believe that the efficiency and versatility of the functionalization method pave the way for creating advanced functional CMs suitable for a range of applications, from oily water treatment and metal remediation to bacterial rejection.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Lu Wang,Lijuan Zhang,Fangtong Liu,Shuncheng Lin,Jun Wu,Panmin Guo,Aniruddha Majumder,Jie Lu
Carbamazepine (CBZ) is a widespread polymorphic drug, with Form II being the metastable polymorph that exhibits higher solubility, making it more attractive for pharmaceutical applications. However, Form II is prone to rapidly converting into the thermodynamically stable Form III at ambient temperatures. In this study, CBZ was crystallized in an aerogel synthesized by crosslinking TEMPO-oxidized cellulose nanofibers (TOCNF) with citric acid, resulting in the formation of the metastable Form II polymorph. PXRD and DSC analyses demonstrated that the aerogel could stabilize Form II at both room and high temperatures. Further storage studies indicated that the carboxyl and hydroxyl groups within the aerogel formed hydrogen bonds with Form II, effectively inhibiting its transformation to the stable polymorph. Molecular dynamics simulations revealed the interaction between cellulose nanofibers and the crystal face of different CBZ polymorphs. The results indicated that the interaction with Form II was the strongest, followed by Form III, while Form I exhibited the weakest interaction. These findings not only provide experimental evidence supporting the stability of CBZ’s metastable polymorph but also offer insights into potential strategies for stabilizing metastable forms of other drugs. This research could pave the way for the development of more effective pharmaceutical formulations that leverage the benefits of metastable polymorphs.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Qinfei Ke,Zhaoyuan Qin,Yifei Zhang,Yuxin Yang,Yunchong Zhang,Xingran Kou
Traditional methods for regulating microcapsules' mechanical properties are limited by a narrow adjustment range and complex processes, hindering their functional applications. This study proposes a new regulation strategy using the interfacial self-assembly of cellulose nanocrystals (CNC). A controllable interfacial layer was formed through the electrostatic interaction between sulfonated CNC and NH 2 -PDMS-NH 2 , combined with tannic acid/polydopamine co-deposition to prepare microcapsules. By adjusting the concentration of NH 2 -PDMS-NH 2 , CNC adsorption at the interface between limonene oil and CNC water was regulated, reducing the emulsion interfacial tension from 20.8 mN/m to 5.6 mN/m. This led to a decrease in droplet size and improved emulsion stability. The storage modulus increased from 134.1 Pa to 625.9 Pa. Atomic force microscopy showed that the interfacial film hickness reached 22.6 nm. The Young's modulus of the obtained microcapsules was tunable within the range of 263.5–1606.5 MPa, representing a substantial enhancement compared to traditional methods. Furthermore, in pressure response tests, significant differences in aroma release were achieved by modulating the mechanical properties of the microcapsules. This study provides a novel strategy for the regulation of mechanical properties of microcapsules and is expected to promote their application in fields such as daily chemical products.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Jialong Tian,Junqing Shi,Hanzhi Zhou,Qingqing Wang,Fenglin Huang,Qufu Wei,Yibing Cai
Personal thermal management (PTM) technology has attracted considerable interests but is limited by material constraints. The emergence of aerogel fiber offers potential promising for the development of advanced functional composites facilitating multifunctional integration from 1D to 3D structures. In this work, 1D cellulose aerogel fiber (CCAF) reinforced with hydroxylated multiwalled carbon nanotubes (CNTs) was fabricated to construct hierarchical PTM textiles. The obtained CCAF with 10 wt% CNTs amount exhibited a high fracture strength of 7.57 MPa, which was subsequently used to incorporate with polyethylene glycol (PEG) for the fabrication of phase change fiber (CCAF-P). The CCAF-P exhibited a fracture strength of 10.1 MPa at 11.2 % strain, a melting enthalpy ( ΔH m ) of 120.2 J/g, and exceptional durability and thermal cycling stability. For wearable PTM application, 2D phase change fabric was fabricated from CCAF-P blended with warp carbon fiber, exhibiting excellent thermal storage capacity, long-term cyclic stability, and outstanding photo- and electro-thermal effects. In addition, 3D composite textile could be assembled conveniently to realize effective infrared stealth and tunable electromagnetic interference (EMI) shielding performance. This innovative strategy demonstrates significant potential for thermal storage and management.
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Small
·
2025
·
IF 12.1
Dong Li,Qiang-Wu Tan,Chun-Xia Zhao,Yuan-Peng Wu,Xiu-Li Wang,Yu-Zhong Wang,Fei Song
3D-printable photonic crystals are widely utilized in sensors, painting decoration, and information encryption. The development of photonic inks capable of forming complex shapes and exhibiting flexible color changes enables the fabrication of structural-color devices with unique structures and specialized functions, while achieving collaborative control over 3D printability and dynamic color-changing function remains a significant challenge. Here, printable and thermosensitive photonic inks are demonstrated through the co-assembly of hydroxypropyl cellulose (HPC) and hydroxyethyl acrylate into cholesteric liquid crystals. The semi-interpenetrating network created by HEA polymerization, along with the hydrogen bonding between the co-phases, facilitates the 3D printing of complex objects. Moreover, this network maintains the cholesteric phase structure while reducing the phase separation of HPC, enabling the manipulation of varying degrees of color change, with sensitivities ranging from 6.4 to 3.0 nm °C −1 . Through 3D printing, these photonic inks can be utilized to create both 2D and 3D objects with dynamic thermochromic properties. This work offers a simple and instructive strategy for developing flexible and responsive photonic materials.
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Polymers
·
2025
·Vol. 17
·期 17
·2377
·
IF 4.9
Zhengsong Wu,Yucheng Gao,Shibin Nie,Dongyue Zhao,Xudong Cheng
Cellulose aerogel is a promising thermal insulation material with terrific thermal insulation and environmental friendliness. However, the intrinsic flammability of polysaccharide molecules and dependence on freeze-drying have limited its application in flame-retardant and thermal management systems. Here, we develop a flame-retardant biomass aerogel based on a dual-network matrix of bacterial cellulose and sodium alginate. This innovative material enables high-efficiency and low-cost preparation via ambient pressure drying technology (only ~3.5% volume shrinkage), while achieving flame retardancy by introducing an inorganic nanosheet microstructure within a polymer matrix. The resulting dual-network flame-retardant cellulose aerogel demonstrates thermal performance superior to that of most polymer foams and conventional cellulose aerogels, featuring an ultra-low thermal conductivity of ~0.04 W m −1 K −1 and a high limiting oxygen index (LOI) of ~69%. This research provides a novel strategy for simultaneous flame-retardant modification and energy-efficient manufacturing of biomass-derived aerogels.
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