MINERALS ENGINEERING
·
2021
·
IF 4.765
Changbin Li,Qing Shi,Guofan Zhang,Hongjiang Liu,Haigang Feng
Talc is a gangue mineral of many sulfide minerals , which is naturally hydrophobic. The depression of talc is very important and challenging in sulfide ore flotation . This research introduced aluminum ions into the process of using carboxymethyl cellulose (CMC) to depress talc. Flotation experiment results showed that aluminum ions used alone exerted a weak depression effect on talc, and that aluminum ions used in conjunction with CMC effectively depressed the flotation of talc at pH 8.5. Results of X-ray photoelectron spectroscopy and adsorption tests showed that the interaction of aluminum ions with talc changed the surface of talc, and Al(OH) 3 formed on the talc surfaces, thereby promoting the adsorption of CMC onto talc and depressing the flotation of talc. On this basis, the morphology of CMC on the talc surface was observed by atomic force microscopy imaging. With the addition of aluminum ions, CMC aggregated to a greater extent, multiple layers adsorbed onto the surface of talc, and the coverage of CMC substantially increased. Based on all tests and analysis, the mechanism of the synergistic effect of CMC and aluminum ions on talc flotation was also proposed.
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Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2020
·
IF 1.349
Peng Zhou,Siyu Lin,Lilin Yu,Shuqin Tao,Genglin Song,Jinxin Yao,Zhiyuan Peng
Tannin-immobilized cellulose was prepared by the phenolic reaction of the phenol ring of tannin with the aldehyde group of aldocellulose, where aldocellulose was prepared by the oxidization of cellulose with sodium periodate as oxidizing agent. The method of immobilized tannin is environmentally friendly due to the lack of crosslinking agent. The adsorption properties of cellulose were improved due to the introduction of tannin. The maximum adsorption capacity of the tannin-immobilized cellulose for berberine hydrochloride was 143.66 mg/g. The isothermal adsorption for berberine hydrochloride conformed to the Langmuir model well. The adsorption of tannin-immobilized cellulose for berberine hydrochloride was a weak chemical adsorption, and the adsorption process was exothermic. The adsorption equilibrium was reached within 90 min in the initial concentration 100 mg/L, and the sorption kinetics fitted well to a pseudo-first-order model. Tannin-immobilized cellulose has potential application prospect in the field of the separation and purification of alkaloids.
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Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2022
·
IF 2.216
Yingchun Huang,Jialing Li,Lei Zhou,Chen Cheng,Ziqiang Hu,Zhiyuan Peng
The chlorinated hydroxyethyl cellulose (HEC-Cl) was prepared by the chlorinated reaction of hydroxyethyl cellulose (HEC) and thionyl chloride, and dopamine-modified hydroxyethyl cellulose (HEC-DA) was prepared by the reaction of dopamine and HEC-Cl. The nano-silver supported on dopamine-modified cellulose (HEC-DA@AgNPs) was obtained by immersing the HEC-DA in AgNO3 solutions, where silver ions are absorbed and reduced by catechol groups. The X-ray photoelectron spectroscopy spectra of HEC-DA@AgNPs shows that the silver nanoparticles was loaded in the HEC-DA, and the diameter of AgNPs on the surface of HEC-DA is about 20 ± 10 nm. The catalytic activity was detected by the reduction of 4-NP, and it could be accomplished within 3 min with an apparent rate constant of 22.9 × 10−3 s−1. Therefore, the HEC-DA@AgNPs is expected to be a promising catalytic material.
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JOURNAL OF FOOD PROCESSING AND PRESERVATION
·
2016
·Vol. 41
·期 2
·e12860
·
IF 0.894
Wen-Xi Yu,Chang-Ying Hu,Zhi-Wei Wang
The aim of this study was to evaluate the kinetics of potassium sorbate (PS) loaded in low methoxyl pectin/carboxymethyl cellulose (PS-LMP/CMC) films into 95% ethanol. The ratio of LMP and CMC was changed from 8:2 to 0:10 by modulating the composition of the initial casting solution, and the corresponding diffusion coefficients were obtained from 0.26 × 10 −12 to 2.11 × 10 −12 cm 2 /s and showed a good linear relationship with the ratio of CMC in LMP/CMC films. The diffusivity and partition coefficient were increased with the increasing of CMC content. A decrease in temperature from 60C to 4C resulted in a reduction of diffusion coefficients from 3.11 × 10 −12 to 0.93 × 10 −12 cm 2 /s. The activation energy for the diffusion of PS in LMP/CMC (4:6) film was 16.42 kJ/mol. The release experiment at 15C showed that it is reliable to predicted release profile of PS from LMP/CMC (4:6) film according to the Fickian model. Practical Application Considered as one of the safest food preservatives, potassium sorbate (PS) is well known for its potential antimicrobial activity and widely used as preservatives in food products. As an environmental-friendly packaging material, low methoxyl pectin/carboxymethyl cellulose (LMP/CMC) antimicrobial films with PS can release antimicrobial agent onto food surface and enhance food safety, and could replace partially conventional plastics packaging material. The present study evidenced that the PS-LMP/CMC antimicrobial films control the release of PS by changing the ratio of polymer matrix. Compared to the experiments, the use of release models to evaluate the release profile of PS in antimicrobial films is economical and time saving and helpful to design packages with desired release of PS.
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CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Ming Li,Shiyu Fu
Wood is actually a natural polymers composite that is easy to process, mainly constituted of cellulose, hemicellulose and lignin. However, most wood-based functional materials are prepared by physical methods, which undoubtedly limit the application of wood-based materials. Herein, the wood aerogel (WA) was obtained from wood by delignification and freezing dried. The WA then was fabricated into an unexpected photochromic wood aerogel (PWA) via surface-initiated atom transfer radical polymerization (SI-ATRP) covalently grafting poly{6-[4-(4-methoxyphenyl-azo)phenoxy]hexyl methacrylate} (PMAZOM). Both WA and PWA showed good compression resilience. The hydrophobicity of PWA was obviously enhanced because of the surface modification. The color of PWA can change from yellow to orange-red after being irradiated by UV light for 30 s. The color of sample can be reversibly changed to yellow under sunlight for 200 s. The lightweight and photosensitive wood aerogel is potential to apply for optical information storage materials and photosensitive devices.
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Materials
·
2026
·Vol. 19
·期 19
·4255
·
IF 3.7
Haopeng Yu,Rui Yang,Xiaohua Feng,Pengyu Li,Hua Li
This study employs the non-solvent-induced phase separation (NIPS) method to fabricate porous cellulose acetate (CA) coatings. By optimizing the concentration of CA andN,N-dimethylacetamide (DMAC), the pore structure and size of the coatings are effectively controlled. The influence of homogeneous solution concentration on the optical properties of CA coatings is explored, and the relationship between the microstructure of the coatings and their radiative cooling performance is analyzed in depth. A self-assembled radiative cooling device is used to experimentally evaluate the cooling effect of the porous CA coatings. The results show that when the CA concentration reaches 15 wt%, the coating exhibits an ordered transition from irregular large pores to well-defined finger-like pores and then to sponge-like pores, achieving the optimal radiative cooling performance. At this concentration, the coating achieves a high solar reflectance (0.3–2.5 μm) of 96.56% and an emissivity of 0.96 in the atmospheric transparency window (8–13 μm). Compared to the uncoated substrate, the temperature difference reaches 18.88 °C, and the cooling effect relative to the ambient temperature is 2.6 °C, demonstrating excellent radiative cooling performance. After 10 cycles of the damp–heat cyclic test, the optical properties of the coating showed almost no change, indicating excellent damp–heat resistance.
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PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
·
2025
·
IF 1.9
Shuang Jin,Yubin Ren,Hongyao Cai,Biqiong Chen,Yupeng Cheng,Weili Liu,Cailiang Peng,Yujie Fu,Chen Lv,Huiling Li
This study introduces a green, sustainable, and efficient approach for biotransforming sophoricoside into genistein from Fructus Sophorae using Aspergillus oryzae by removal of one molecule of glucose by β-glucosidase, an edible microorganism immobilized on magnetic cellulose and treated with deep eutectic solvents (DES). The goal was to enhance the biotransformation ratio by optimizing reaction conditions and selecting the most suitable DES. Various DESs, including natural deep eutectic solvents (NADES), were assessed for their ability to improve catalytic performance. Among them, the NADES system comprising choline chloride (CHCL) and glycerol (G) exhibited the highest catalytic efficiency (32.19 mg/g) under optimal conditions: temperature 33 °C, time 65 hours, pH 5.5, and a liquid-to-solid ratio of 45:1 (mL/g). This yield was 10.60 times greater than the genistein yield from untreated F. Sophorae. This combination notably increased cell membrane permeability, aiding the bioconversion process. The cellulose immobilization technique provided a stable and reusable microreactor and maintained microbial activity (80.37%) over 10 cycles. These findings validate the bioconversion method as a promising and sustainable strategy for genistein production from plant-derived sophoricoside, with potential applications in pharmaceutical and nutraceutical industries.
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DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2026
·
IF 13.2
Guancheng Liu,Zhe Zhang,Xin Long,Kai Zhang,Bai Yang
Hemoperfusion is an effective technique for removing low-density lipoprotein (LDL) from the bloodstream, with the performance of the adsorbent critical to its efficacy. This study innovatively introduces carbonized polymer dots (CPDs), which exhibit excellent biocompatibility and structural versatility, as a new functional ligand in hemoperfusion. A novel hemoperfusion adsorbent was prepared using cellulose microspheres as the support material. Here, we synthesized highly negatively charged CPDs using a hydrothermal method facilitated by nitric acid in the presence of citric acid and p-aminosalicylic acid. This process resulted in a stable zeta potential of −61.0 mV at physiological pH. Incorporating CPDs onto cellulose microspheres enhanced their negative charge from −1.22 mV to −31.0 mV, significantly improving LDL adsorption capacity to 80.3 ± 1.2 mg/g, with a removal rate of 80.3 ± 1.2%, which is 5.7 times greater than high-density lipoprotein (HDL). Furthermore, the introduction of CPDs improved the hemocompatibility of cellulose microspheres, resulting in a low hemolysis rate of 0.81% and minimal cytotoxic effects. FTIR and XPS characterization confirmed that the CPDs contain carboxyl and nitro groups, enhancing their negative charge properties. This research presents a new class of functional ligands for hemoperfusion adsorbents, indicating potential advancements in blood purification technologies.
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DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Zheyi Zhu,Li Wang,Haojie Yu,Yuan Meng,Yalong Wang,Ying Zhang,Chenguang Ouyang,Yuguang Lu,Lei Zhang,Yan Sheng
Water shortages in distant and dry areas require sustainable measures. An alternative composite hydrogel, which is extremely effective in solar-powered atmospheric water harvesting, is proposed in this research. Its synthesis was performed using radial polymerization. Based on polyacrylamide (PAM), hydroxypropyl cellulose (HPC) was incorporated to increase hydrophilicity. Lithium chloride (LiCl) was used as a humectant, and carboxylated carbon nanotubes (CNT-COOH) were used as photothermal nanofillers. The formulation of the optimized hydrogel (PAM-HPC0.3-CNT3.5-LiCl25) shows a high capacity of water absorption of 2.52 g g–1 at 90% RH and 25 °C and has the ability to achieve 90% saturation in 2 h at 40% RH. The hydrogel surface temperature under exposure to simulated sunlight (1.0 kW m–2) is 48.4 °C and allows desorbing approximately 96% of water in 10 h. It is also shown that the material has good cyclic stability after 10 adsorption–desorption cycles. Experimental testing outdoors proves its technical feasibility to collect atmospheric water on natural light. This paper offers a promising and energy-saving approach to materials to harvest water in areas with plentiful sunlight.
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CELLULOSE
·
2026
·
IF 4.6
Chang Minmin,Peng Ke,Shen Peng,Jia Zhixin,Zhang Xuejin
Cellulose-based foams have received increasing attention in sustainable materials due to their biodegradability and environmental friendliness. However, the poor compressive resilience and insufficient structural stability caused by the dynamic hydrogen bond between cellulose molecular chains severely restrict their applications in flexible sensing. In this study, a synergistic strategy combining Fe 3 ⁺ cross-linking and fines reinforcement is successfully developed. Specifically, carboxymethyl cellulose (CMC) serves as the matrix, which is combined with fines to reinforce the network structure. Fines are fragmented microscale pulp fractions separated from beaten bleached softwood pulp after screening with a 200-mesh sieve. And carbon black (CB) is introduced to enhance the conductivity, while Fe 3 ⁺ is introduced for cross-linking to further strengthen the stability of materials, thus yielding the multifunctional CMC/fines/CB/Fe 3 ⁺ composite foams. The resulting foams possess excellent compressive resilience, with a height retention rate of 89.25% after 1000 cycles under 40% strain. Meanwhile, the foams also exhibit ultra-low density (0.0590 g/cm 3 ), high porosity (90.3%) and low thermal conductivity (0.049 W/(m·K)). Crucially, the CMC/fines/CB/Fe 3 ⁺ foams exhibit ultrahigh sensitivity (8.55 kPa⁻ 1 ), which can work stably in both air and underwater environments, and maintain sensing stability after water immersion-drying cycles. This study provides an effective strategy for the preparation of high-performance cellulose-based foams and lays a foundation for the development of waterproof wearable electronic devices.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Chengjie Sun,Yixin Luo,Mo Qiu,Qingxin Guan,Ruitong Ma,Zilu Zhang,Feng Shen,Shizhou Shen,Jirui Yang,Wei Li
Insufficient synergy between hydrolysis and hydrogenation seriously hinders the efficient conversion of insoluble cellulose in biomass utilization. Herein, using tobacco straw-derived lignin to prepare ordered mesoporous carbon (OMC), we report a complex-mediated strategy for constructing a Ni–P–O@NixP/OMC catalyst with tailored P–C–O doped sites and Niδ+–P–Oδ− frustrated Lewis pairs (FLPs). Characterizations and DFT results indicate that the P–C–O sites in a P/O-doped OMC support promote H2O adsorption and polarization, accelerating H3O+ generation for enhanced cellulose hydrolysis. Simultaneously, the Niδ+–P–Oδ− FLPs on the NixP surface promote H2 heterolysis and H2O dissociation, generating highly active Hδ+/Hδ– and H3O+ species that synergistically enhance hydrolysis and hydrogenation. Benefiting from the spatial coupling of hydrolysis and hydrogenation at the atomic scale, the prepared catalyst achieves an 80% sorbitol yield from cellulose in water at a low Ni loading of 4.5 wt %, along with satisfactory cycling stability. Increasing the Ni content to 8.0 wt % further raises the sorbitol yield to 89.5%, outperforming most reported noble-metal-based catalysts. Finally, a sorbitol yield in excess of 90% is obtained by using the residue after lignin extraction as the substrate. This work establishes a design paradigm for efficient cascade biomass conversion by creating atomic-scale P–C–O sites and Niδ+–P–Oδ− FLPs that enable spatially coupled hydrolysis and hydrogenation through tailored electronic structures.
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BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Yuanyuan Zhang,Menglong Chen,Yating Wang,Zhenwei Xiong,Keqiang Xu,Xinyu Liu,Hui Lin,Quanjun Liu,Hongge Chen
The in vitro biosynthesis of artificial starch from non-food cellulose biomass represents a sustainable strategy for the valorization of agricultural waste and alleviation of food shortages. However, the previously established in vitro cellulose-to-starch pathway is fundamentally limited, as only half of the glucose units in cellulose can be integrated into amylose, resulting in only 50% of the theoretical amylose yield. Here, we constructed a glucose-utilization bypass consisting of polyphosphate glucokinase and phosphoglucomutase (PGM) to redirect the glucose byproduct toward amylose biosynthesis, thereby increasing the theoretical amylose yield to 100%. To facilitate the thermodynamically unfavorable conversion of glucose-6-phosphate to glucose-1-phosphate catalyzed by PGM in the glucose-utilization bypass, three types of bienzyme complex between PGM and the next-step enzyme potato α-glucan phosphorylase (PGP) were constructed. The results showed that the fusion complex PGP-PGM exhibited the highest promoting effect on strengthening the glucose-utilization bypass with the amylose yield of one-pot cellulose-to-starch biotransformation reaching up to 68.2%, which was 22.4% higher than that achieved with separate PGM and PGP. The newly established cellulose-to-starch pathway 2.0 with a strengthened glucose-utilization bypass significantly enhanced the efficiency of starch production with a 2.3-fold increase in amylose yield compared to the previous pathway, and therefore improved the economic feasibility of valorization of cellulosic biomass into starch.
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PubMed
高影响因子
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