Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 48
·17403-17409
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IF 7.059
Cuifang Meng,Dandan Yang,Ye Wu,Xuejia Zhang,Haibo Zeng,Xiaoming Li
Encapsulating cesium lead halide (CsPbX3, X = Cl, Br, and I) perovskite quantum dots (PQDs) into stable shells has been proved to be an effective strategy for improving their stability, which however usually forms agglomerated particles or alters PQDs’ original morphology and optical properties. Herein, we propose a surface activation strategy to prepare single CsPbBr3@SiO2 core–shell particles. (3-Aminopropyl)triethoxysilane (APTES) is used as a bifunctional surface ligand, which not only effectively passivates the surface defects of PQDs, but also provides –SiOCH3 and –SiOH groups for the formation of Si–O–Si covalent bonds with the subsequently introduced silanes. Furthermore, by controlling the hydrolysis rate of silanes, we realized the preparation of single CsPbBr3@SiO2 core–shell particles with an average shell thickness from 1 to 2.7 nm, and the PQDs maintained their initial cubic morphology and optical properties after coating. The stability of CsPbBr3@SiO2 in harsh environments has been effectively improved owing to the complete encapsulation of the SiO2 shell. As a result, the emission peak of CsPbBr3@SiO2 remains constant at 515 nm after being heated at 60 °C for 84 h, and the photoluminescence (PL) intensity still remains 90% after storage for 6 h in a high humidity environment. This work not only enhances the stability of PQDs for practical applications but also provides a reliable method to synthesize single core–shell particles, which can be instructive to other PQD systems.
研究领域:
材料科学
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纳米技术
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化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Wenjun Zhou,Yanjian Wang,Chunhua Ni,Liangmin Yu
Currently, it is highly desirable to develop a novel antifouling resin with a controllable hydrolysis rate and stable and effective antifouling performance for marine antifouling coatings. In our study, we prepared natural rosin-based zinc (RZn-x) resins by a relatively facile and green synthetic method from Zn(OH) 2 and antimicrobial natural rosin, which is considered a toxicity-free raw material, thus ensuring the green and antimicrobial character of the material. In their optimal combination, the RZn-x coating surface exhibited ideal peeling behaviour upon immersion in seawater, which caused the WCA of the material surface to change from 55° before immersion to 135° after immersion for 60 days and enhanced the antifouling properties. Dynamic simulation experiments of these resins also demonstrated that the hydrolysis rate of this material immersed in dynamic seawater was related to the zinc content, and we could control the self-polishing ability of the resins by adjusting the content of Zn(OH) 2 participating in the reaction. Moreover, hydrolysis led to a hydrophobic surface, which could prevent fouling organisms from adhering. Laboratory bioassays against BSA adsorption (immersed for 4 h: 1.986 μg/cm 2 ), bacterial (over 95 % reduction) and marine algal adhesion (more than 60 % reduction) revealed outstanding anti-protein, bacteriostasis and anti-algal growth and adhesion properties compared to pure rosin and the control sample. The long-term antifouling capability in marine field tests indicated that the RZn-x resins maintained their antifouling activity for more than 6 months, especially RZn-50, which showed excellent antifouling performance.
研究领域:
材料科学
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海洋生物学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yakun Li,Rongrong Chen,YanHua Feng,Xun Sun,Liang Tang,Kazunobu Takahashi,Peili Liu,Jun Wang
We constructed two kinds of amphiphilic acrylate boron fluorinated polymers (ABFPs) with backbones comprising acrylate fluorinated polymers (AFPs) and side chains comprising hydrolyzable pyridine–phenylborane functional groups. We determined the hydrolysis rates of the ABFPs by measuring their weight loss ratios. The ABFPs with shorter fluorinated side chains had higher rates of hydrolysis. We investigated and confirmed the amphiphilic and antifouling behavior of the ABFPs, using X-ray photoelectron spectroscopy (XPS) and surface wettability analyses. During immersion for 90 days in the Bohai Sea of China, the ABFP coatings exhibited good antifouling performance. We also assessed the environmental characteristics of the ABFP coatings by determining the chemical oxygen demand (COD) and growth rate of diatoms on their surfaces. The present study provides new insight into the development of environmentally friendly ABFPs with desirable antifouling properties.
研究领域:
材料科学
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环境科学
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海洋生物学
✓ 已验证
产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Zhaoxian He,Zhijie Zhu,Li Jiang,Hongkui He,Zhongliang Cheng,Caihong Wang,Xu Chen,Anjun Li,Xianfeng Du
This study investigated starch-lipid complexes formation during sorghum grain steaming and its inhibitory mechanism on starch gelatinization and hydrolysis. Scanning electron microscopy revealed that the remaining ungelatinized starch (RUS) within the white core region of steamed grains retained a granular structure but exhibited surface collapse. 13 C nuclear magnetic resonance analyses indicated that, compared to native sorghum starch (NS), RUS from grains steamed for 10 min displayed an increased single helix content (from 0.69 % to 1.24 %), confirming starch-lipid complexes formation. Confocal laser scanning microscopy demonstrated that starch-lipid complexes formed a protective barrier on RUS surfaces after 10 min of steaming. This barrier impeded water penetration, thereby delaying subsequent gelatinization and increasing the gelatinization temperature from 74.25 °C to 87.20 °C. It also blocked the action of enzymes, reducing the starch hydrolysis rate from 77.93 % to 68.54 %. This study provides a new research approach for investigating the effect of lipid on starch gelatinization during sorghum grain steaming, and a theoretical basis for precisely controlling sorghum steaming time and improving brewing efficiency.
研究领域:
食品科学
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谷物化学
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碳水化合物化学
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农产品加工
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分子结构分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Future Foods
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2025
·
IF 7.2
Yueyuan Chen,Ningtao Zhao,Jingru Song,Xiaojie Yan,Xiaohua Jiang,Fenglai Lu,Min Zhang,Dianpeng Li
Starch-guest complexes are gaining popularity due to their low digestibility and unique physicochemical properties. In this study, kudzu starch (KS) was modified by complexing it with four food-medicine homology extracts (FMH) to form starch-guest complexes (KS-FMH). The assembly process involved pre-gelatinization, autoclaving, and ultrasonic treatment. Digestion and structural characterization of KS-FMH were investigated to assess their potential as low glycemic index (GI) foods. Following the complexation treatment, the KS-FMH exhibited a more favorable hydrolysis pattern compared to native KS, showing a lower hydrolysis rate and equilibrium concentration ( C ∞ ) ( p < 0.05). Moreover, the addition of FMH affected the structural properties of KS, possibly due to non-covalent interactions between KS and FMH. The morphology and distribution of phenolic guests in KS-FMH were determined using scanning electron microscopy, confocal laser scanning microscopy, and high-performance liquid chromatography. These analyses demonstrated the selective inclusion characteristics of FMH in complexation, confirming the formation of KS-FMH complexes. This study underscores the potential of FMH as functional additives for creating low-GI diets with KS, thus promoting their practical application in the food industry.
研究领域:
食品科学
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淀粉技术
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功能性食品
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营养学
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生物高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Shuai Li,Mo Niu,Haoshui Yu,Xueying Song
Bio-degradable plastics have gained significant attention due to their biodegradability and environmental friendliness. However, how to improve the degradation rate of PBAT/PLA composites in aqueous environments is still a challenge. In this study, a green processing technology was proposed to achieve the rapid degradation of PBAT/PLA. By using lignin as an intermediate medium and adopting a continuous batch feeding strategy, the compatibility and biodegradability of PBAT/PLA composite materials are simultaneously improved in the absence of compatibilizers. The resulting PBAT/PLA/lignin films demonstrate excellent mechanical, water barrier, and degradation properties. The elastic modulus ( E ), tensile strength ( σ b ) and elongation at break ( ε b ) of PBAT/PLA/2%lignin are 124.2 MPa, 45.5 MPa, and 737%, respectively. The weight loss rate of the PBAT/PLA/10%lignin film after hydrolysis for 60 h was 30.0 wt%, which was 316% higher than that of the PBAT/PLA film. This sustainable and green processing strategy promotes the application of lignin in the field of composite materials, while solving the problems of poor mechanical properties and slow hydrolysis rate of PBAT/PLA composite materials.
研究领域:
材料科学
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高分子科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 10
·6205-6213
·
IF 12.732
Jiacheng Xing,Danhua Yuan,Hanbang Liu,Yansi Tong,Yunpeng Xu,Zhongmin Liu
The synthesis of TS-1 zeolites is regarded as a milestone in zeolite history, and it has led to the revolution of the green oxidation system of using H2O2 as an oxidant, leaving only water as the byproduct. However, because of the highly hydrolyzable titanium source, the preparation of TS-1 requires complex synthesis conditions. Moreover, the difference in the hydrolysis rate between the silicon source and titanium source tends to increase the difficulty of titanium insertion into the framework, and it is easy to generate extra-framework Ti species during the synthesis. Here, a high-quality TS-1 zeolite with a large external surface area and free of extra-framework Ti species has been successfully synthesized by using a kind of novel polymer containing titanium and silicon. Due to the high hydrolysis resistance of the polymer reagent, a good matching of the hydrolysis rate between the silicon source and the titanium source is realized during crystallization, which facilitates the incorporation of titanium into the framework. Furthermore, the TS-1 zeolite exhibited excellent catalytic performance in n-hexane oxidation with hydrogen peroxide as the oxidant. This method of synthesizing zeolites from polymers is expected to be widely applied for the synthesis of other titanium-containing zeotype materials.
研究领域:
化学
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材料科学
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催化
✓ 已验证
DOI
高影响因子
International Journal of Nanomedicine
·
2024
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IF 6.6
Huiyun Zhang,Shunru Wei,Yunfei Hu,Yu Zhang,Hao Yao,Gang Qi,Michael Adu-Frimpong,Congyong Sun
Background Bufalin (BFL, an active anti-tumor compound derived from toad venom) is limited in its application due to high toxicity and rapid metabolism of the cardiotonic steroid. Ester prodrug self-assembly nanoparticles have shown significant improved effects in addressing the above-mentioned issues.Methods An ester bond was formed between linoleic acid and bufalin to synthesize linoleic acid-bufalin prodrug (LeB). The self-assembly nanoparticles (LeB-PSNs) containing different mass ratios of DSPE-PEG2k and prodrug (6:4, 7:3, 8:2, 9:1 and 10:0) were prepared via co-precipitation method and defined as 6:4-PSNs, 7:3-PSNs, 8:2-PSNs, 9:1-PSNs and LeB-PSNs, respectively. Further, the characterization (particle size, zeta potential, surface morphology and stability) of the nanoparticles was carried out. Finally, we evaluated the impact of different ratios of DSPE-PEG2k on the hydrolysis rate, cytotoxicity, cellular uptake, cell migration and proliferation suppression potential of the prodrug nanoparticles.Results The linoleic acid-bufalin prodrug (LeB) was successfully synthesized. Upon the addition of DSPE-PEG2k at different weight ratios, both particle size and polydispersity index (PDI) significantly decreased, while the zeta potential increased remarkably. No significant differences in particle size, PDI and Zeta potential were observed among the 9:1, 8:2 and 7:3 PSNs. Notably, the 8:2 (w/w) DSPE-PEG2k nanoparticles exhibited superior stability, hydrolysis and cellular uptake rates, along with efficient cell cytotoxicity, cell migration and proliferation suppression.Conclusion These findings indicate that DSPE-PEG2k could improve the performance of BFL prodrug nanoparticles, namely enhancing stability and achieving adaptive drug release by modulating the hydrolysis rate of esterase. This study therefore provides more opportunities for the development of BFL application.
研究领域:
药学
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纳米技术
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药物递送系统
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肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2022
·
IF 4.132
Yujia Tang,Jiawei Hu
This work aims to reveal the effect of potassium permanganate (KMnO4) on the sludge anaerobic digestion process, as well as the relevant mechanisms. Experimental data showed that the biomethane production was gradually increased from 159.3 ± 3.0 to 211.5 ± 5.1 mL/g VSS (volatile suspended solids) when the KMnO4 content was increased from 0 to 0.08 g/g VSS, with an increasing rate of 32.8%. A further increase in the KMnO4 dosage however resulted in the decline of the methane yield. First-order kinetic model analysis indicated that higher methane production potentials and hydrolysis rates were achieved in KMnO4-added reactors than in the control. Mechanism analysis demonstrated that KMnO4 not only efficiently disintegrated the sludge flocs, which resulted in the increased contents of dissolved organics, but also enhanced the proportion of biodegradable substances in the sludge liquor. Meanwhile, the biodegradabilities of recalcitrant humus and lignocellulose substances were found to be promoted by KMnO4 treatment as higher methane yields were attained from KMnO4-treated model substrates. 16S rRNA analysis illustrated that the functional microbes participated in anaerobic digestion were largely enriched in the KMnO4-pretreated digestor. Furthermore, efficient inactivation of the fecal coliform was achieved by KMnO4 pretreatment.
研究领域:
环境工程
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废物管理
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生物化学工程
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
·
IF 3.898
Abid Ali,Bilal Ul Amin,Wenwu Yu,Taijiang Gui,Weiwei Cong,Kai Zhang,Zheming Tong,Jiankun Hu,Xiaoli Zhan,Qinghua Zhang
Biofouling, which comprises the absorption of proteins and the adhesion of bacteria to the surface of living entities, is a severe concern for the maritime sector since it ultimately leads to hydrodynamic drag, resulting in a higher increase in fuel consumption. As a result, polymer resins are crucial in the marine sector for anti-biofouling coatings. In this work, the poly(caprolactone-ethylene glycol-caprolactone)-polyurethane (PECL-PU) are prepared through ε -caprolactone (CL), poly(ethylene glycol) (PEG), 4,4′-methylene bis(cyclohexyl isocyanate ) and 1,4 butanediol. Our study demonstrate that the PECL-PU copolymer degraded in artificial seawater (5.21%), enzymatic solution (12.63%), and seawater (13.75%) due to the presence of PEG segments in the laboratory-based test under static condition. Because the addition of PEG segments are increased the polymer's amorphous area and decreased the crystallization of the polycaprolactone (PCL) in the copolymer, as demonstrated by differential scanning calorimetry , X-ray diffraction, and water contact angle studies. Therefore, the hydrolysis rates of PECL-PU were higher than the caprolactone- co -polyurethane (CL-PU). The antifouling test showed that PECL-PU3 copolymer had about 90.29% protein resistance, 85.2% Escherichia coli ( E. coli ) reduction and 94.61% marine diatom Navicula incerta reduction comparison to the control. We have developed an eco-friendly and inexpensive promising degradable polyurethane for reduction of bacterial biofilm, which can preserve the formation of biofouling on marine coating under practical sea conditions.
研究领域:
材料科学
·
海洋生物学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Chengyi Sun,Kai Du,Zhaoxian He,Zhijie Zhu,Yuqing Hu,Caihong Wang,Liping Mei,Qingling Xie,Yajie Chen,Yanyan Liu,Guangli Luo,Saddam Mustafa,Xu Chen,Xianfeng Du
This study investigated the effect of liquid nitrogen ball-milled mechanochemical treatment on multiscale structure and physicochemical properties of starches with typically selected A (rice starch, ReS), B (potato starch, PtS) and C (pea starch, PeS) crystal types. The morphology of starch samples changed from integral granules to irregular fragments, and the interaction between the exposure O H bonds led to a serious agglomeration. As the treatment times extended, the crystalline structure of starch samples was gradually destroyed, and the excessive treatment approached amorphization. Moreover, the thermal stability of starch samples showed the downward tendency; and with amorphization increased, the swelling power (SP), solubility (S), water absorption capacity (WAC), oil absorption capacity (OAC) and hydrolysis rate of starch samples gradually increased. The obtained results provided a theoretical foundation for broadening the application range of ball-milled starches with different crystal types.
研究领域:
食品科学
·
材料科学
·
化学工程
✓ 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）