INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2018
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IF 3.909
Junjun Kong,Yi Li,Yungang Bai,Zonglin Li,Zengwen Cao,Yancun Yu,Changyu Han,Lisong Dong
A novel polyester poly(diethylene glycol succinate) (PDEGS) was synthesized and evaluated as a plasticizer for polylactide (PLA) in this study. Meanwhile, an effective sustainable filler, functionalized eggshell powder (FES) with a surface layer of calcium phenyphosphonate was also prepared. Then, PLA biocomposites were prepared from FES and PDEGS using a facile melt blending process. The addition of 15 wt% PDEGS as plasticizer showed good miscibility with PLA macromolecules and increased the chain mobility of PLA. The crystallization kinetics of PLA composites revealed that the highly effective nucleating FES significantly improved the crystallization ability of PLA at both of non-isothermal and isothermal conditions. In addition, the effective plasticizer and well-dispersed FES increased the elongation at break from 6% of pure PLA to over 200% for all of the plasticized PLA composites. These biodegradable PLA biocomposites, coupled with excellent crystallization ability and tunable mechanical properties, demonstrate their potential as alternatives to traditional commodity plastics.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
WATER RESEARCH
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2024
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IF 11.4
Chengyou Sun,Chao Huang,Ping Wang,Jinglin Yin,Haoran Tian,Zili Liu,Haiyin Xu,Jian Zhu,Xinjiang Hu,Zhiming Liu
Fly ash (FA) and eggshells (ES) are common solid wastes with significant potential for the recovery of phosphorus from water. This study focuses on synthesizing a low-cost and environmental-friendly phosphate adsorbent called eggshell-fly ash geopolymer composite (EFG) using eggshells instead of chemicals. The CaO obtained from the high-temperature pyrolysis of eggshells provides active sites for phosphate adsorption, and CO 2 serves as a pore-forming agent. The phosphate adsorption performance of EFG varied with the eggshell-fly ash ratios and achieved a maximum of 49.92 mg P/g at an eggshell-fly ash ratio of 40 %. The adsorption process was well described by the pseudo-second-order model and the Langmuir model. EFG also exhibited a good regeneration performance through six-cycle experiments and achieved the highest phosphate desorption at pH 4.0. The results of the column experiment showed that EFG can be used as a filter media for phosphorus removal in a real-scale application with low cost. Soil burial test indicated saturated EFG has a good phosphate slow-release performance (maintained for up to 60 days). Overall, EFG has demonstrated to be a promising adsorbent for phosphorus recovery.
研究领域:
环境科学
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农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Zhiwei Li,Abdukaiyum Abdurashid,Ruxangul Jamal,Tursun Abdiryim,Jiangan You,Jin Shang,Jin Wei,Yanqiang Zhou,Erman Su,Longjiang Huang
The output of polyethylene (PE) is enormous and widely used, but the waste polyethylene products pollute the environment. In this study, a new composite material with excellent mechanical properties, good thermal stability and crystallization properties was prepared by using recycled polyethylene/high-density polyethylene (R-PE/HDPE) as matrix, PE-g-MAH was used as a compatibilizer, glass fiber (GFKH) and eggshell powder (ESPKH) treated with silane coupling agent KH550 were used as reinforcement phases. The results showed that the composite containing 30 wt% GFKH and 0.5 wt% ESPKH (GFKH/ESPKH0.5) exhibited significant enhancements in multiple properties compared to R-PE/HDPE. Specifically, its crystallinity, storage modulus, tensile strength, bending strength, and impact strength were measured as 62.9 %, 918.8 MPa, 49.91 MPa, 42.73 MPa, and 10.68 KJ/m 2 , respectively. These values represent substantial improvements of 33.3 %, 107.9 %, 125.3 %, 115.3 %, and 79.8 % over those of R-PE/HDPE (47.2 %, 441.9 MPa, 22.15 MPa, 19.85 MPa, and 5.94 KJ/m 2 , respectively). Thermal analysis revealed that the incorporation of GFKH and ESPKH significantly enhanced the thermal stability of R-PE/HDPE. Specifically, the GFKH/ESPKH0.5 composite demonstrated a Vicat softening temperature (VST) of 122.6 ℃ and a temperature at 5 % weight loss (T 5 % ) of 415.6 ℃, corresponding to increases of 6.9 ℃ and 41.0 ℃, respectively, compared to those of pristine R-PE/HDPE (115.7 ℃ and 374.6 ℃). Through the analysis of variance (ANOVA) parameters P-value and F critical value, it can be seen that ESPKH had a significant effect on the mechanical properties of the composite. This experiment primarily investigates the relationship between composite material properties and microstructure, and it provides a novel approach for modifying recycled thermoplastic resin and designing high-performance composite materials. A comparison of the test results with those of traditional building materials reveals that GFKH/ESPKH0.5 composite exhibits strong potential in the manufacture of sustainable construction components, parts, and products.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Hao Xu,Jiaxu Li,David Julian McClements,Hao Cheng,Jie Long,Xinwen Peng,Zhenlin Xu,Man Meng,Yidong Zou,Guanxiong Chen,Zhengyu Jin,Long Chen
Starch has great potential to replace petroleum-based plastics in food packaging applications. However, starch films often exhibit poor mechanical and barrier properties, and are vulnerable to moisture and bacterial contamination . This study proved that the incorporation of eggshell powder (ES) enhanced the hydrogen bonding in starch-based films significantly, which contributed to improved tensile strength , Young's modulus , and water resistance of the films. The performance of ES-incorporated films could be optimized by adjusting the size, concentration, and surface property of ES in the film matrix. Notably, adsorbing epigallocatechin gallate (EGCG) on the surface of porous ES contributed to enhanced dispersibility of the fillers in the film matrix, which increased the tortuous path of light, water vapor, and oxygen have to take through the films, resulting in increased UV screening performance, water vapor and oxygen barrier property of the films by 60 %, 7.2 %, and 27.9 %, respectively. Meanwhile, loading EGCG in ES also enable superior antibacterial activity of the final films. This study suggests that eggshell fillers offer a sustainable means of improving the functional performance of starch-based films, which may increase their application as packaging materials in the food industry.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
VACUUM
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2023
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IF 4
Zhihua Liu,Qiaoling Liu,Xiaoyu He,Yihai Zhu,Qunlong Pan,Rongmou Zhang,Haiming Yu
Failure of surgical treatment is usually the result of bacterial colonization around the implant. This subsequently brings about various diseases such as peri-implantitis and sepsis. The purpose of this study was to develop and evaluate the antimicrobial properties of polydopamine adhered eggshell powder-loaded copper sulfide antimicrobial coatings. Here, we used eggshell powder-loaded copper sulfide as an antimicrobial agent to form an antimicrobial coating on the surface of titanium alloy screws using the chelating action of polydopamine. The coating showed good antibacterial effects against both Gram-positive and Gram-negative bacteria represented by Staphylococcus aureus and Escherichia coli . A series of subsequent characterizations confirmed the perfect loading of the material on the screws, and subsequent friction experiments on porcine femurs also demonstrated the good adhesion of the antimicrobial coating. Meanwhile, cytotoxicity assessment was performed by the CCK-8 method, confirming cellular biosafety. This work explores the value of eggshell-loaded CuS nanomaterial coatings in the prevention and treatment of orthopedic endothelial infections, which contributes to the translational application of novel antimicrobial materials in the clinical setting and has important social and economic value.
研究领域:
材料科学
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生物材料
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生物医学工程
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抗菌技术
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骨科
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）