Polymers
·
2019
·Vol. 11
·期 1
·181
·
IF 3.164
Peijian Sun,Song Yang,Xuehui Sun,Yipeng Wang,Lining Pan,Hongbo Wang,Xiaoyu Wang,Jizhao Guo,Cong Nie
To selectively reduce the yield of hydrogen cyanide (HCN) in the cigarette smoke, functional porous carboxymethyl cellulose/cellulose acetate (CMC/CA) composite microspheres were prepared via the double emulsion-solvent evaporation method. Cupric ions, which have a high complexing ability toward HCN, were introduced to the CMC/CA composite microspheres during the fabrication process via an in situ ion cross-link method. The microspheres were characterized using nitrogen adsorption, mercury intrusion porosimetry, and scanning electron microscopy (SEM). The microspheres have a predominantly macroporous structure indicating weak physisorption properties, but sufficient functional cupric ion groups to selectively adsorb HCN. With these CMC/CA microspheres as filter additives, the smoke yield of HCN could be reduced up to 50%, indicating the great potential of these microspheres as absorbents for removing HCN from cigarette smoke.Keywords:porous microspheres;carboxymethyl cellulose;cellulose acetate;cupric ions;chemisorption;hydrogen cyanide;smoke yield
研究领域:
材料科学
·
烟草研究
·
环境健康
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 13
·5211
·
IF 4.6
Huatong Zhang,Shunjie Su,Shuxia Liu,Congde Qiao,Enhua Wang,Hua Chen,Cangheng Zhang,Xiaodeng Yang,Tianduo Li
Bio-based packaging materials and efficient drug delivery systems have garnered attention in recent years. Among the soluble cellulose derivatives, carboxymethyl cellulose (CMC) stands out as a promising candidate due to its biocompatibility, biodegradability, and wide resources. However, CMC-based films have limited mechanical properties, which hinders their widespread application. This paper aims to address this issue by exploring the molecular interactions between CMC and various additives with different molecular structures, using the rheological method. The additives include O-carboxymethylated chitosan (O-CMCh), N-2-hydroxypropyl-3-trimethylammonium-O-carboxymethyl chitosan (HTCMCh), hydroxypropyltrimethyl ammonium chloride chitosan (HACC), cellulose nanocrystals (CNC), and cellulose nanofibers (CNF). By investigating the rheological properties of film-forming solutions, we aimed to elucidate the influencing mechanisms of the additives on CMC-based films at the molecular level. Various factors affecting rheological properties, such as molecular structure, additive concentration, and temperature, were examined. The results revealed that the interactions between CMC and the additives were dependent on the charge of the additives. Electrostatic interactions were observed for HACC and HTCMCh, while O-CMCh, CNC, and CNF primarily interacted through hydrogen bonds. Based on these rheological properties, several systems were selected to prepare the films, which exhibited excellent transparency, wettability, mechanical properties, biodegradability, and absence of cytotoxicity. The desirable characteristics of these selected films demonstrated the strong biocompatibility between CMC and chitosan and cellulose derivatives. This study offers insights into the preparation of CMC-based food packaging materials with specific properties.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2024
·
IF 5
Fengyao Cong,Zhenjie Yu,Aiqin Wang,Yu Cong,Tao Zhang,Ning Li
In this work, a new route was developed for the synthesis of jet fuel range C16 and C11 paraffins with cellulose, the most abundant biomass. In the first step, cellulose was selectively converted to 5-methylfurfural (MFA) by a cascade hydrolysis/isomerization/dehydration/chlorination reaction in a toluene/NaCl aqueous solution biphasic system, followed by the hydrodechlorination over Pd/C catalyst at room temperature. After being decarbonylated, the MFA was converted to 2-methylfuran (2-MF). Among the investigated catalysts, Pd/C exhibited the highest activity for this reaction, which can be rationalized by the higher activity of Pd for the decarbonylation. Subsequently, tris(5-methylfuran-2-yl)methane (TMFM) was obtained by the solvent-free hydroxyalkylation/alkylation (HAA) reaction of MFA and 2-MF over a series of acidic resins. Among them, Nafion resin exhibited the highest activity, which can be rationalized by the high acid strength of this catalyst. Finally, the TMFM as obtained was hydrodeoxygenated to jet fuel range C16 and C11 paraffins under the co-catalysis of Ni/hydroxyapatite (Ni/HAP) and H-ZSM-5.
研究领域:
生物化学
·
催化化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Lili Li,Xiaojing Wang,Yali Hu,Wang Sun,Yugao Ding,Nisha He,Guofu Zhou,Zhen Zhang
Enzymes are promising biocatalysts due to their high efficiency, mild conditions, high specificity, nontoxicity, and environmental friendliness. However, the enzyme suffers from poor stability and reusability. Enzyme immobilization is a commonly used technology to enhance its stability and reusability. In this study, the cellulose nanocrystal (CNC) was chosen as the enzyme immobilization carrier due to its sustainability, high specific surface area, biocompatibility, water dispersibility, and excellent Pickering emulsifying ability. Lipase was immobilized on a polydopamine-coated CNC (PC), and the obtained lipase-immobilized PC (LPC) displayed significantly enhanced stability and higher activity in harsh conditions compared to free lipase. LPC possessed partial wettability with both water and oil phases and a lower absolute value of the zeta potential than CNC, endowing it with a better Pickering emulsifying ability than CNC. LPC was fixed at the oil–water interface of the Pickering emulsion by ultrasonication, and the resulting Pickering emulsion droplets were employed as microreactors for ester hydrolysis and synthesis via Pickering interface biocatalysis. LPC displayed significantly enhanced catalysis activity at the oil–water interface of the Pickering emulsion compared to free lipase in a traditional oil–water biphasic system due to the increased contact area between the enzyme and the substrate, reduced diffusion distance of the substrate, and lipase interface activation effect. Moreover, LPC could be facilely recycled by centrifugation, and the recycled LPC still retains high catalysis activity. This study proposed a facile and sustainable method of enzyme immobilization to enhance its stability and reusability and achieved a significantly increased activity via Pickering interface biocatalysis.
研究领域:
生物技术
·
化学工程
·
材料科学
·
酶学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Guozhen Wang,Tong Lu,Xinjiang Zhang,Mengna Feng,Chengshuang Wang,Wei Yao,Shunchao Zhou,Zhenzhou Zhu,Wenping Ding,Meng He
The exploiting of abundant natural polymers as potential absorbents for heavy metal ions is attracting. Cellulose is the most abundant natural polymer and exhibits amazing properties such as high chemical stability, hydrophilicity and biodegradability . However, some properties of pure cellulose-based materials including adsorbability are usually not enough, so it is important to improve their properties to broaden their applications. In the present work, hydroxyapitite (HAP) nanoparticles were prepared and introduced to improve the cellulose hydrogel (CG) properties. The structure and properties of the resultant cellulose/HAP nanocomposite hydrogels (CHG) were characterized and studied systematically. The results indicated that HAP nanoparticles was fixed and distributed evenly in CG. The maximum decomposition temperature increased gradually from 334.6 °C for CG to 346.7 °C for CHG, and the compressive strength increased gradually from 100 kPa for CG to 570 kPa for CHG with the increase of HAP content, respectively. Moreover, the adsorption capacity (q e ) value of CHG towards Cu 2+ could reach more than 300% higher than that of CG. As a potential absorbent, CHG exhibited relatively good recyclability of more than 78% after 10 cycles. Therefore, the introduction of HAP improved the properties of CG greatly, showing wide potential applications.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
MOLECULES
·
2021
·Vol. 26
·期 16
·4891
·
IF 4.412
Xiuya Wang,Ke Wan,Pengbo Xie,Yuanyuan Miao,Zhenbo Liu
With increasing energy demand driving the need for eco-friendly and efficient energy storage technology, supercapacitors are becoming increasingly prevalent in wearable devices because of their portability and stability. The performance of these supercapacitors is highly dependent on the choice of electrode material. The high capacitance and mechanical properties needed for these materials can be achieved by combining graphene’s stable electrical properties with renewable cellulose’s excellent mechanical properties into porous aerogels. In this study, graphene-cellulose hydrogels were prepared by a one-step hydrothermal method, with porous, ultra-light, and mechanically strong graphene-cellulose aerogels then prepared by freeze-drying. These composite aerogels possess excellent mechanical strength and high specific capacitance, capable of bearing about 1095 times the pressure of their own weight. Electrochemical tests show the specific capacitance of these composite aerogels can reach 202 F/g at a scanning rate of 5 mA/cm2. In view of their high surface area and fast charge transport provided by their 3D porous structure, graphene-cellulose aerogels have great potential as sustainable supercapacitor electrodes.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yipeng Chen,Jiayi Zhang,Zirui Zhuang,Jinghan Zhou,Yang Peng,Baokang Dang,Qingfeng Sun
Effectively regulating heat flow between buildings and their environment, through the use of infrared property-structural materials that passively regulate radiative heat dissipation, not only enhances thermal comfort but also offers a potentially cost-effective solution for energy conservation and countering global warming. However, fulfilling the demand for aesthetic appearance and effective display in real-life situations while maintaining infrared properties remains a significant impediment to the commercialization of structural materials. In this work, we utilized ion-dyed cellulose as the base material and employed gel-assisted and thermal pressing methods to produce ion-dyed cooling cellulose bulk. Experimental results demonstrate its bending strength reaching 111 MPa, and impact toughness reaching 79.8 kJ m −2 . While offering a wide range of colors, it exhibits excellent radiative cooling performance. During days with strong solar radiation, three different colors of ion-dyed cooling cellulose bulk achieve temperature reductions of 2.2–3.9 °C. Moreover, the fabrication process is simple, cost-effective, and conducive to industrialization. This study provides a practical and theoretical foundation for the development and design of colored wood-based radiative cooling materials.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Yanlan Pan,Dacheng Li,Yanyou Huang,Liangdong Ye,Li Jiang,Huiqin Lin,Qiaoyan Wei,Shaorong Lu
This device biodegrades 70% in soil within 15 days. • This device offers wide humidity sensing with only 1.2% hysteresis. • This device achieves 38 V output via triboelectric generation. • This device intelligently monitors sleep apnea syndrome. • This material integrates sensing and smart packaging functions. Recently, bio-based humidity sensing materials have attracted considerable attention due to their environmental friendliness. However, existing fully bio-based humidity sensors still suffer from limitations such as single functionality and relatively limited sensing performance, and they remain inferior to conventional electrode-based or multifunctional composite material systems. In addition, their functional extension in practical application scenarios such as intelligent packaging has not yet been fully realized. To address these issues, this study constructs a fully bio-based composite humidity sensing system based on carboxymethyl cellulose (CMC), carboxymethyl konjac glucomannan (CMKGM), and phytic acid (PA), referred to as CKP. Through synergistic material design, comprehensive optimization of mechanical strength, wide humidity response range, and low hysteresis characteristics is achieved. The sensor exhibits a stable and broad humidity response over the range of 35% RH to 98% RH, together with a low hysteresis (1.2%), and can be applied to practical scenarios such as human respiration monitoring. In addition, for intelligent packaging applications, the humidity sensing output is integrated with a microcontroller development board and an LED display unit to realize a visual humidity indication function, enabling intuitive visualization of environmental humidity variations. Overall, the CKP composite film demonstrates significant advantages in biodegradability, humidity sensitivity, and multifunctional integration. It provides a new strategy for the development of green multifunctional humidity-responsive materials and holds promising application prospects in electronic devices and environmental monitoring.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Fangyuan Zhou,Kezhen Jia,Hongke Zhang,Wanbin Zhu,Hongliang Wang
Develop AlCl 3 -assisted mechanochemical strategy enabling efficient one-pot conversion of recalcitrant cellulose to HMF. • Synergistic interplay between Lewis acidity and mechanical stress disrupts H-bonding networks and lowers crystallinity, markedly enhancing the chemical reactivity of cellulose. • Optimization of the Brønsted/Lewis acid balance by controlled HCl addition achieves a high HMF yield of 62.8% from mechanochemically pretreated cellulose. • This green and scalable approach can be broadly extended to diverse lignocellulosic biomass wastes, including waste paper, corncob residue, bamboo powder, and corn straw, to efficiently produce HMF. 5-Hydroxymethylfurfural (HMF) is a pivotal bio-based platform chemical, yet its direct production from inexpensive and abundant cellulose remains challenging due to the intrinsic recalcitrance of cellulose and the competing degradation of intermediates and products under acidic conditions. Herein, we report an AlCl 3 -assisted mechanochemical strategy that couples catalytic Lewis acidity with ball-milling mechanical force to activate cellulosic feedstocks, enabling their efficient one-pot conversion to HMF. Detailed structural characterizations demonstrate that the synergistic interplay between AlCl 3 and mechanical stress disrupts the extensive hydrogen-bonding network and partially cleaves β-1,4-glycosidic linkages, leading to pronounced reductions in cellulose crystallinity and degree of polymerization and, consequently, markedly enhanced chemical reactivity. The resulting mechanochemically pretreated cellulose (BMM-AlCl 3 ) was directly converted into HMF without additional catalysts during the reaction step, as the Al species introduced during pretreatment served as the catalytic sites, affording a yield of up to 46.8%. By further optimizing the Brønsted/Lewis acid balance through controlled HCl addition, the HMF yield increases to 62.8%. Importantly, this pretreatment strategy is broadly applicable to diverse lignocellulosic biomass resources, including waste paper pulp, corncob residue, bamboo powder, and corn straw, consistently delivering high HMF yields. This work establishes an efficient and potentially scalable mechanochemical route for the valorization of cellulose and lignocellulosic biomass into HMF. Download: Download high-res image (185KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2026
·
IF 4.6
Xu Hao,Zeng Xianting,Bin Yanling,Wu Renman,Liu Liting,Qin Chengrong,Liang Chen,Yao Shuangquan,Mo Wenxuan,Liu Baojie
Chlorine dioxide (ClO 2 ) is a strong oxidative free radical. Under its oxidative action, lignin was effectively degraded at temperatures between 50 and 80 °C. However, excessively high temperatures can lead to energy waste and enhance chlorination by-reactions, resulting in the formation of harmful substances. Therefore, this study constructed a high-concentration chlorine dioxide oxidation method, whereby lignin in pulp was effectively removed at room temperature (25 °C). Through efficient recycling of chlorine dioxide, the remaining ClO 2 does not increase costs, and the physicochemical properties of the pulp before and after treatment indicate that high concentrations of ClO 2 at room temperature do not damage the fibers. Using a ball-milling device, a nanocellulose membrane with good air permeability was prepared. Molecular dynamics simulations demonstrate that the reaction between lignin molecules and ClO 2 molecules is primarily guided by van der Waals interactions, with a lesser contribution from electrostatic forces. This finding provides a novel method for fiber purification at room temperature and proposes a feasible approach for the valorization of cellulose.
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-8
·
IF 4.011
Xu Airong,Wang Yongxin,Liu Rukuan
The utilization of cellulose in industrial applicat is of great significance to sustainable development of human society and reducing dependence on dwindling fossil resources. Nevertheless, this utilization of cellulose has actually been limited due to its insolubilization. Here, novel solvents consisting of diallylimidazolium methoxy acetate ([A 2 im][CH 3 OCH 2 COO]) and N- methylpyrrolidinone (NMP) were developed. The solubility of cellulose in [A 2 im][CH 3 OCH 2 COO]/NMP was determined, and the influence of [A 2 im][CH 3 OCH 2 COO]/NMP molar ratio on cellulose dissolution was systematically investigated. Meanwhile, we also presented the affecting factors of the cellulose material fabrication including preparation approach, [A 2 im][CH 3 OCH 2 COO] and cellulose solution concentration. Attractively, the [A 2 im][CH 3 OCH 2 COO]/NMP solvents display much powerful dissolution capacity for cellulose even at 25 °C (25.4 g 100 g −1 ). This is mainly ascribed to the combined factors: The hydrogen bond interactions of the H2, H4 and H6 in [A 2 im] + and carboxyl O atom in [CH 3 OCH 2 COO] − with the hydroxyl H atom and O atom in cellulose; the dissociation of NMP towards [A 2 im][CH 3 OCH 2 COO]; the stabilization of NMP towards the dissolved cellulose chains. In addition, the thermostability and chemical structure of the regenerated cellulose from the solvents was also estimated.
研究领域:
材料科学
·
化学工程
·
可再生资源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2012
·
IF 3.628
Xinwang Cao,Bin Ding,Jianyong Yu,Salem S. Al-Deyab
Cellulose nanowhiskers is a kind of renewable and biocompatible nanomaterials evoke much interest because of its versatility in various applications. Here, for the first time, a novel controllable fabrication of cellulose nanowhiskers from jute fibers with a high yield (over 80%) via a 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)/NaBr/NaClO system selective oxidization combined with mechanical homogenization is reported. The versatile jute cellulose nanowhiskers with ultrathin diameters (3–10 nm) and high crystallinity (69.72%), contains C6 carboxylate groups converted from C6 primary hydroxyls, which would be particularly useful for applications in the nanocomposites as reinforcing phase, as well as in tissue engineering, pharmaceutical and optical industries as additives.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）