Biomass Conversion and Biorefinery
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2023
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IF 4
Xu Yanran,Niu Yanfei,Wu Chunhua,Yan Jia,Rao Xiaoping,Shi Zhengjun,Xu Kaimeng,Algadi Hassan,Guo Zhanhu
In the paper, five quaternary ammonium salts derived from rosin were synthesized, characterized and their antifungal activities against different molds were studied. Choline quaternary ammonium salt and tetramethylammonium hydroxide were synthesized from dehydroabietic acid and the rosin ethanolamine ester quaternary ammonium salts which are new compounds were synthesized from propylene pimaric acid. Their structures were confirmed by FTIR, 1 HNMR, 13 CNMR, and high resolution mass spectrometry. The antifungal activities of the synthesized quaternary ammonium salts from rosin acid were tested by Oxford cup method, and their minimum inhibitory concentration was determined. The results show that quaternary ammonium salts derived from rosin acid have inhibitory effects on bamboo slices to some extent. Among them, propylene pimaric acid ethanolamine ester quaternary ammonium salts (A 1 and A 2 ) showed obvious antifungal activity in the Oxford cup test. The Oxford cup activity test and anti-mildew effect of quaternary ammonium salts (B 1 and B 2 ) synthesized from rosin acid are significant, and there are almost no mould growth on bamboo slices. It can be inferred that A 1 , A 2 , B 1 and B 2 are expected to be used as bamboo mildew inhibitors. Graphical abstract Five quaternary ammonium salts derived from rosin were synthesized and characterized; and their antifungal activities against different molds were studied.
研究领域:
化学
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生物学
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材料科学
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Ling Liu,Hong Peng,Ying Shen,Limin Shen,Guiming Fu,Yin Wan,Zhaodi Xu
In-depth understanding the influence of ionic liquid structure on the selective dissolution of the main biopolymers from plant cell walls is necessary for designing ionic liquids that could efficiently pretreat and fractionate lignocellulosic biomass. The current study aimed to investigate the effect of electronegativity of anions of 1-butyl-3-methylimidazolium halide based ionic liquids BmimCl, BmimBr, and BmimI on dissolving bamboo slices. The surface of pretreated bamboo slices and the regenerated carbohydrate-rich fractions were characterized carefully. The results revealed that the ability to damage bamboo cell walls and dissolve bamboo slices followed the order of BmimCl>BmimBr>BmimI, which was consistent with the electronegativity of halogen anions (Cl - >Br - >I - ). The dissolving selectivity for lignin from bamboo cell walls was in the order of BmimBr>BmimI>BmimCl. The ionic liquids performed a greater dissolving selectivity for lignin than carbohydrates (cellulose and hemicellulose). The permeating rate of ionic liquid molecules into bamboo cell walls increased with the enhancement of electronegativity of halogen anions. The regenerated carbohydrate-rich fractions were rich in hemicellulose and cellulose with an amount of lignin. Both temperature and time had also great effect on the dissolution of bamboo slices. On the whole, the electronegativity of halogen anions had a profound impact on the deconstruction of bamboo cell walls and dissolution of bamboo. This study provided important theoretical assistance for designing ionic liquids that could more efficiently pretreat and fractionate lignocellulosic biomass.
研究领域:
生物质工程
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植物化学
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产品关联
DOI
高影响因子
Frontiers in Materials
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2021
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IF 3.515
Lin Peng,Xu Yuchen,Hou Junfeng,Zhang Xiaochun,Ma Lingfei,Che Wenbo,Yu Youming
Bamboo is a rich natural resource in the Asia Pacific, and it is widely used in the construction and decoration industry. Meanwhile, bamboo is an extremely combustible natural polymer material. Herein, the bamboo slices were treated with melamine and phytic acid using layer-by-layer (LBL) assembly technology to improve their flame retardancy properties. The morphology and chemical composition of untreated and treated bamboo slices were measured by scanning electron microscopy equipped with energy dispersive X-ray analysis and Fourier transform infrared spectra. The results showed that two-dimensional melamine–phytate (MP) nanoflakes were successfully formed and deposited on the bamboo surface. The deposition of the MP coating caused the earlier degradation of the bamboo to form char, according to thermogravimetric analysis. The peak heat release rates of the treated bamboo slices were reduced by more than 28% compared to those of the untreated ones. The MP coating promoted the formation of thermally stable char, which was responsible for the significant improvement in flame retardancy. Besides, the char layer with excellent thermal resistance performed a vital role in suppressing flame spread.
研究领域:
材料科学
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生物质资源利用
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Lian Chen,Xianshuo Wei,Ye Sun,Yaoting Xue,Jingwen Wang,Qijun Wu,Chunxin Ma,Xuxu Yang,Gaigai Duan,Feng Wang,Shaoju Jian,Weisen Yang,Shaohua Jiang
Near-infrared light-responsive hydrogels are one of the most important soft biomimetic actuators owing to their accuracy, remote control performance, and permeability. However, the complex deformations and materials of hydrogel actuators are still a serious challenge. Herein, we have developed a novel composite hydrogel actuator by combining natural bamboo sheet and nigrosine/poly(N-isopropylacrylamide) (PNIPAM) composite hydrogel. The high-efficient photothermal conversion of the nigrosine/PNIPAM composite hydrogel sheet generates light-responsive actuation that is remotely controllable. Furthermore, the bamboo sheet with fiber-oriented structure can be cut at different angles, which facilitates programmable 3D complex deformations in the actuator. Accordingly, we have designed a series of biomimetic actuating devices, including simulations of butterfly antenna, Dendrobium , smart switch, and even a multi-step deformational biomimetic claw. In addition, we also explored a biomimetic insect with precisely-controlled fast movements on the water surface based on Marangoni effect. This work provides a simple but general strategy for fabricating biomimetic actuators and will inspire new designs for intelligent soft actuators.
研究领域:
材料科学
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仿生学
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光化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Kexia Jin,Da Zhang,Binqiang Pan,Khak Ho Lim,Tiffany Abitbol,Wen-Jun Wang,Xuan Yang
With nano-dimension, high aspect ratio, and high mechanical properties, cellulose nanofibrils (CNFs) are emerging sustainable nanomaterials with potential applications in films and composites. However, their preparation often involves a series of chemical treatments such as delignification, bleaching and harsh chemical pretreatments, and treats lignin as waste. Herein, we report a sustainable method to prepare high-quality lignin-containing cellulose nanofibrils (LCNFs) from bamboo chips, using a one-step maleic anhydride esterification treatment without any toxic organic solvent or catalyst. The resultant LCNFs have high lignin content (24%), high surface charge (2.25 mmol/g), fine diameter (∼2.5 nm), and high aspect ratio (>400). These superior properties can be translated into the corresponding nanopaper films with high optical transmittance (85% at 600 nm), UV shielding (<10% transmittance at 200–350 nm), hydrophobicity (water contact angle 75°), thermal stability (maximal weight loss temperature at 338 °C), and mechanical properties. Importantly, such films show the best reported tensile strength (290 MPa) among all the LCNF films, and it still outperforms conventional CNF films after 5 rounds of recycling. Furthermore, as sustainable nanofillers, such LCNFs can be directly incorporated into a hydrophobic polyester matrix, and significantly enhances the UV shielding and mechanical properties of the final nanocomposites. Altogether, with eco-friendly production and multiple functions, these LCNFs are a new class of nanocelluloses with high industrial relevance.
研究领域:
材料科学
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可持续化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Chao Wang,Siyi Xue,Yufeng Huang,Yangyang Li,Xiao Ma
Hydroxyapatite (HA) nanocrystals in bones typically exhibit a layered structure, characterized by extensive exposure of (100) facet and uniaxial orientation with organic collagen fibers. However, the inherent brittleness of traditional hydroxyapatite particles often complicates the achievement of optimal structural and property characteristics in subsequent composite preparations. Researchers found that high aspect ratio and small crystal size can greatly improve the rigidity of hydroxyapatite. In this study, we synthesized "bamboo lamellar"-like hydroxyapatite particles (LHA) that combine the biological advantages of exposed crystal planes with the mechanical benefits of a higher aspect ratio. We investigated the effects of the calcium complexing agent stearic acid and the alkaline regulator urea on the morphology of LHA samples using XRD, SEM, and TEM, with all final samples exhibiting pronounced laminar characteristics. Biocompatibility studies with pre-osteoblast MC3T3-E1 cells demonstrated that the LHA series samples displayed superior biocompatibility compared to commercially available hydroxyapatite. Alkaline phosphatase (ALP) activity assays indicated that LHA significantly outperformed commercial hydroxyapatite in promoting bone induction. Additionally, MC3T3-E1 cells adhered well to the surface of the LHA film. Incorporating LHA into a chitosan matrix significantly enhanced performance compared to both the pure organic matrix and the commercial hydroxyapatite control group. Thus, this " bamboo lamellar " biomimetic hydroxyapatite particle shows great potential as both an organic enhancer and a promoter of pre-osteoblast-induced bone formation, positioning it as a promising material for bone tissue engineering.
研究领域:
材料科学
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生物医学工程
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组织工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）