RSC Advances
·
2026
·Vol. 16
·期 9
·8166-8177
·
IF 6.1
Yifei Meng,Xuan Ou,Zhenghui Liu,Shun Yao,Chuxiao Hu,Qiuchi Yu,Wenjie Xia
Achieving sustainable and cost-effective production and modulating the structure of biosurfactants is increasingly obtaining attention due to carbon neutrality and eco-safety. Nanotechnology-assisted approaches have been emerging as a promising strategy for this purpose. Here, we investigated the effect of metal oxide nanoparticles on the yield and molecular structure of trehalose lipids produced by Rhodococcus erythropolis WJ-2. Sunflower oil was identified as the optimal carbon source against other oils, yielding 12.60 g L−1. Subsequent optimization of four key medium components (sunflower oil, ZnSO4, (NH4)2SO4, and yeast extract) using a Box–Behnken design elevated the baseline yield to 24.75 g L−1. Interestingly, the trehalose lipid yield was further enhanced to 28.12 g L−1 compared to the optimized medium without NPs when supplemented with 0.5 g per L Fe2O3 NPs (≈20 nm). Furthermore, structural diversity analyzed by FTIR and HPLC-MS showed the obvious m/z value shifts of trehalose lipids with NPs comprising longer hydrophobic fatty acid chains and more unsaturated fatty acid derivatives. In the absence of Fe2O3 NPs, the main m/z peaks were detected at m/z 496, 694, 877, and 1044 (relative abundances: 14.19%, 27.08%, 44.18%, 14.55%), corresponding to short-to-medium-chain fatty acid derivatives (e.g., methyl hexanoate, methyl octanoate). In contrast, the dominant peaks shifted to m/z 673, 807, 874, and 1043 (relative abundances: 22.21%, 18.39%, 47.64%, 11.76%) with Fe2O3 NP supplementation. These findings suggest that the unique redox properties and high surface area of Fe2O3 nanoparticles could enhance the yield and modulate the structures to enable the tailored biosynthesis of glycolipids by influencing key-enzyme activity and metabolic flux. This nanoparticle-assisted fermentation strategy offers a promising route for the scalable production of designer biosurfactants for diverse industrial applications.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Yuhang Bai,Jinrui Li,Jia Liu,Peipei Wang,Xing Zhao,Laifei Cheng
Y 3 Si 2 C 2 powders were successfully fabricated through the in situ reaction of Y and SiC using ultrafast high-temperature sintering (UHS), which is the first attempt to synthesize rare-earth silicates (RE 3 Si 2 C 2 ) at an ultrahigh rate. Phase analysis reveals that a relatively pure Y 3 Si 2 C 2 product is obtained at 1050 °C, exhibiting distinctive lamellar morphology. The synthesized Y 3 Si 2 C 2 powder was then employed to formulate a shear-thinning ink, and an optimized emulsion-based ink combined with direct ink writing enabled the precise fabrication of honeycomb structures, which exhibited exceptional mechanical properties after sintering. Compared with conventional sintering processes featuring low heating rates (∼10 °C/min) and prolonged dwell times (∼2 h), UHS can efficiently synthesize Y 3 Si 2 C 2 within significantly shorter times (∼50 s) and at lower temperatures (∼950 °C). The proposed integration of the preparation and forming methods paves the way for the exploration of novel perspectives in the application of Y 3 Si 2 C 2 in complex-structure ceramics.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Wenjing Ma,Juntao Zhao,Olayinka Oderinde,Jingquan Han,Zhongche Liu,Buhong Gao,Ranhua Xiong,Qilu Zhang,Shaohua Jiang,Chaobo Huang
Marine pollution and industrial wastewater have caused serious environmental pollution, thereby resulting into an alarming damage to public health in the past decades, hence the high demand for, cost effective, energy-efficient oil-water separation technologies for the removal of oil contaminants from such water. Herein, we report a facile method to fabricate superhydrophobic/superoleophilic membrane by immersing a polyimide (PI)-based nanofibrous membrane into a water/ethanol/ammonia/dopamine mixture, followed by modification with 1H, 1H, 2H, 2H-perfluorodecanethiol (PFDT). The PI-based membrane exhibited water contact angle (WCA) above 153°, while the oil contact angle (OCA) approached 0°, thereby promoting an outstanding chemical stability which sustained its superhydrophobicity when immersed in aqueous solutions at different pH values. Additionally, the PI-based membrane possesses ultrahigh flux, high separation efficiency and good reusability in oil-water separation. The aforementioned properties, as well as the easily scale-up preparation process ensure that this promising as-fabricated membrane can be applied for practical environmental applications including treatment of oily wastewater and oil spillage clean-up.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xin-Yi Hui,Cheng Zuo,Ying Xu,Bo Wang,Jia-Long Wen,Tong-Qi Yuan
The conversion of biomass feedstocks into bio-based nanomaterials was made easier with hydrated DES (HDES) pretreatment , which can boost the value-added applications of lignocellulosic biomass. In this study, two types of HDESs were initially prepared by 3-Chloro-2-hydroxypropyltrimethyl ammonium chloride (CHPTAC) with formic acid (FA) and acetic acid (AA), respectively. We achieved rapid conversion of bamboo feedstock into bio-based nanomaterials (including lignin nanoparticles, LNPs ; lignin-containing cellulose nanofibers, LCNFs) through one-pot microwave-assisted HDES pretreatment coupled with robust nanofabrication strategies. The findings demonstrated that an impressive delignification ratio of 92.10 % and a cellulose retention ratio of 92.95 % were achieved under the optimal DES pretreatment conditions (120 °C, 20 min). The fractionated lignin fractions were effortlessly self-assembled into dispersed, uniformly shaped circular LNPs (<100 nm) using a novel proposed strategy, which was successfully applied to stabilizing oil-in-water (O/W) Pickering emulsions. To produce LCNFs, we conducted functionalization of cellulose-rich residue in aqueous citric acid followed by simple ultrasonic treatment. Compared to the control LCNF, the LCNF-based self-assembly films exhibited significantly improved mechanical properties and hydrophobicity (water contact angle 106.26°). In short, the proposed HDES pretreatment combined with robust nanofabrication strategies will broaden the fractionation and fabrication of bio-based nanomaterials, enhancing their potential in promising fields.
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JOURNAL OF ECONOMIC ENTOMOLOGY
·
2025
·
IF 2.4
Tian Jingyin,Zhao Guoyu,Zhou Xia,Hu Feng,Shao Kangmeng,Dassanayaka Sajith Madhusanka,Jin Linhong
The successful commercialization of entomopathogenic nematodes (EPNs) as a biopesticide product depends on industrial mass production of viable infective juveniles (IJs) at low cost. This study focused on enhancing the yield of the Steinernema carpocapsae All (Weiser) and reducing its production costs. An optimal basal medium was screened among several basal media, and several optimized components were included in the selected optimal basal medium. The optimal medium formulation was obtained by evaluating the yield, virulence, and survival rates of S. carpocapsae All at different times. The results showed that when isopropylstilbene was added to the basal medium together with insulin, the yield increased from 13.14 × 104 IJs/ml with the basal medium to 19.63 × 104 IJs/ml. At 30 d of low temperature storage, the survival rate increased from 31.42% (basal medium) to 56.83% (optimal medium), demonstrating a prolonged the shelf life. The virulence of S. carpocapsae All was measured before and after 30 d of storage on sponges. The virulence against Tenebrio molitor (Linnaeus) (Coleoptera: Tenebrionidae) and Galleria mellonella (Linnaeus) (Lepidoptera: Pyralidae) was 90 and 86.67% (before) and 93.33 and 94.44% (after), respectively, when insects were treated at 48 h, long-term cryogenic storage has no effect on the virulence. The yield with the individual optimization components added to the optimal basal medium was lower than when the components were combined, indicating that there may be a synergy between the 2 components. The results would provide practical technology for low-cost commercial production of S. carpocapsae All and promote field applications.
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高影响因子
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