Advanced Materials Interfaces
·
2016
·Vol. 3
·期 24
·1600725
·
IF 3.365
Xiu Dai,Yu Cao,Xiaowei Shi,Xinlong Wang
In this study, the nanoparticles of metal–organic framework ZIF-8 are incorporated into the poly(lactic acid) (PLA) to prepare the nanocomposite electrospun membrane. The diameter and the surface roughness of the fibers can be successfully controlled by increasing the content of ZIF-8 in the membranes. The prepared PLA/ZIF-8 membranes have increased oil wettability and significantly improved mechanical property compared with pure PLA membrane. The tensile strength, stain at break of PLA/ZIF-8 membrane with 0.5 wt% ZIF-8 are increased to 5.02 MPa and 88.81% compared to 2.77 MPa and 57.89% for pure PLA membranes, respectively. The PLA/ZIF-8 membranes are proved to be good candidate for oil/water separation with high efficiency because of the fast oil wetting ability, the roughness of fibers, and the adsorption effect of the porous ZIF-8 nanoparticles.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zhiyuan Chen,Yingying Zhang,Xiuyuan Feng,Xiaoci Cui,Huining Xiao,Anquan Yang,Minxie,Ranhua Xiong,Weixia Cheng,Chaobo Huang
In our latest research endeavor, we are proud to present an innovative approach to the synthesis of carbon dots (CDs) derived from the biomass xylan, which we have termed P-CDs. These P-CDs are meticulously integrated with a state-of-the-art biomass nanofiber membrane composed of polycaprolactone (PCL) and polylactic acid (PLA), resulting in the creation of a novel solid-state fluorescent sensor, designated as NFP-CDs. This cutting-edge sensor has been meticulously engineered for the highly sensitive and specific detection of nitrite ions (NO 2 − ), a critical parameter in various fields. The NFP-CDs sensor stands out for its user-friendly design, cost-effective production, and portable nature, making it an ideal choice for rapid and visible nitrite ion detection. It exhibits an extraordinary response time of less than 1 s, which is a testament to its high sensitivity. Furthermore, the sensor demonstrates exceptional selectivity and specificity, with a remarkably low detection threshold of 0.36 μM. This is achieved through a sophisticated dual detection mechanism that synergistically combines colorimetric and spectral analyses, ensuring accurate and reliable results. In addition to its impressive technical specifications, the NFP-CDs sensor has been rigorously tested and validated for its efficacy in detecting nitrite ions in real-world samples. These samples include a diverse range of food products such as rock sugar, preserved mustard, kimchi, and canned fish. The sensor has demonstrated a remarkable recovery rate, which varies from 99 % to 106 %, highlighting its potential for practical application in nitrite ion detection. This research not only offers a robust and effective strategy for the detection of nitrite ions but also carries profound implications for enhancing food safety and bolstering environmental monitoring efforts. The development of the NFP-CDs sensor represents a significant step forward in the field of sensor technology, providing a powerful tool for the detection of nitrite ions and contributing to the broader goals of public health and environmental stewardship.
研究领域:
材料科学
·
分析化学
·
食品安全
·
环境监测
·
传感器技术
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DOI
PubMed
高影响因子
MOLECULES
·
2021
·Vol. 26
·期 23
·7140
·
IF 4.412
Jingwen Chen,Yinxuan Li,Wenzheng Shi,Hui Zheng,Li Wang,Li Li
This study aimed to develop an active biodegradable bilayer film and to investigate the release behaviors of active compounds into different food matrices. Cinnamaldehyde (CI) or thymol (Ty) was encapsulated inβ-cyclodextrin (β-CD) to prepare the activeβ-CD inclusion complex (β-CD-CI/β-CD-Ty). The tilapia fish gelatin-sodium alginate composite (FGSA) containingβ-CD-CI orβ-CD-Ty was coated on the surface of PLA film to obtain the active bilayer film. Different food simulants including liquid food simulants (water, 3% acetic acid, 10% ethanol, and 95% ethanol), solid dry food simulant (modified polyphenylene oxide (Tenax TA)), and the real food (Japanese sea bass) were selected to investigate the release behaviors of bilayer films into different food matrixes. The results showed that the preparedβ-CD inclusion complexes distributed evenly in the cross-linking structure of FGSA and improved the thickness and water contact angle of the bilayer films. Active compounds possessed the lowest release rates in Tenax TA, compared to the release to liquid simulants and sea bass. CI and Ty sustained the release to the sea bass matrix with a similar behavior to the release to 95% ethanol. The bilayer film containingβ-CD-Ty exhibited stronger active antibacterial and antioxidant activities, probably due to the higher release efficiency of Ty in test mediums.Keywords:biodegradable bilayer film;tilapia fish gelatin;β-cyclodextrin inclusion complex;release kinetics;food simulants;active activities
研究领域:
食品科学
·
材料科学
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DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 27
·275604
·
IF 3.953
Kai Cheng,Jie Zhou,Yujie Zhao,Yu Chen,Lan Ming,Da Huang,Rui Yang,Zhenyu Lin,Daozhen Chen
Herein, an amphiphilic block copolymer CD44-targeting peptide-conjugated polyethylene glycol-block-hydroxyethyl starch-block-poly (L-lactic acid) (CD44p-conjugated PEG-b-HES-b-PLA) are synthesized, which could self-assemble into the pH-responsive and CD44-targeting polymer micelles against breast cancer cells MDA-MB-231. Emodin (Emo) is a natural anthraquino with pharmacological activities in anti-tumor effects. However, Emo suffers from poor water solubility, low biocompatibility, rapid systemic elimination, and off-target side effects, resulting in unsatisfactory treatment outcomes. Nanotechnology-based drug delivery systems have proven great potential for cancer chemotherapy. The constructed polymeric micelles Emo@CD44p-PM have exhibited an average size of 154.5 ± 0.9 nm characterized by DLS and TEM. Further, the Emo@CD44p-PM have effective Emo-loading capacity, good thermal stability, and pH responsiveness. Intracellular uptake study shows the enhanced cellular internalization of Emo@CD44p-PM due to the increased exposure of CD44p enhances the cellular internalization of Emo@CD44p-PM effectively. Furthermore, the in vitro results showed Emo@CD44p-PM has been observed good biocompatibility and anti-tumor effects. Therefore, the polymeric micelles Emo@CD44p-PM provide a promising delivery strategy of targeted therapy for breast cancer.
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PubMed
高影响因子
FIRE SAFETY JOURNAL
·
2022
·
IF 3.78
Qinyong Liu,Xingyu Chen,Guiyang Zhu,Xiaoyu Gu,Hongfei Li,Sheng Zhang,Jun Sun,Xiaodong Jin
A novel integrative supramolecular intumescent flame retardant was fabricated by self-assembly of melamine, p -aminobenzene sulfonic acid and phytic acid and was abbreviated as MAP. After chelation with Fe 3+ or Zn 2+ , the resulted products (MAP-Fe and MAP-Zn) were melt-blended with polylactic acid (PLA) to enhance the flame retardancy of PLA. The fire performance was characterized by limiting oxygen index (LOI), UL-94 vertical burning and cone calorimeter tests. The results showed that control PLA was flammable with a low LOI of 20.4%, and it cannot satisfy any UL-94 grade for its severe ignited dripping, whilst the incorporation of 3% MAP-Zn increased the LOI to 29.2％, upgraded the UL-94 rating to V-0, and reduced the peak heat release rate by 18.7%. It was proposed that MAP-Zn mainly promoted the formation of more graphitic carbon in the char residues . In addition, the presence of 3% MAP-Zn slightly reduced the tensile strength of PLA from 64.9 MPa of the control PLA to 60.1 MPa, which met the requirements of most practical applications.
研究领域:
材料科学
·
高分子化学
·
消防安全工程
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 31
·e52720
·
IF 3.057
Xiaolong Wang,Weiguang Gong,Xin Meng,Chenyang Li,Jin Gao
Biobased flame retardant (FR) has attracted great interest owing to its green and degradable properties similar to polylactic acid (PLA). In this work, with ammonium polyphosphate (APP) as the core, chitosan (CS) and halloysite (HNT) as the shell, a biobased FR (APP@CS@HNT) with a core-shell structure was prepared through the self-assembly method. The flame retardancy of PLA composites has been improved with the addition of the FR (APP@CS@HNT). With the loading of 17 wt% APP@CS@HNT, the PLA composite shows a high limiting oxygen index value (29.4%) and achieves vertical burning (UL-94) test V0 rating. Compared with pure PLA, the cone calorimetry test indicates that the peak heat release rate (PHRR) and total heat release decrease from 299.88 to 152.29 kW/m 2 and from 102.0 to 71.2 MJ/m 2 , respectively. The addition of APP@CS@HNT can also improve the smoke suppression performance of PLA composites. Such enhanced flame retardancy is mainly attributed to APP@CS@HNT prompting the PLA matrix to produce more continuous and denser carbon layers at a lower temperature to form physical barriers.
研究领域:
材料科学
·
高分子科学
·
消防安全工程
·
纳米技术
·
环境科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 31
·12058-12064
·
IF 8.262
Ailin Gao,Yongqing Zhao,Qing Yang,Yinyi Fu,Lixin Xue
A facile method to prepare rose petal-like quasi-superhydrophobic poly(lactide) (PLA) membrane surfaces with tunable water droplet adhesion properties based on the stereo-complex co-crystallization of PLAs via non-solvent induced phase separation processes is reported. The co-crystallization of the D- and L-enantiomer of PLA on the bottom surfaces contacting the base glass has led to the formation of hierarchical microstructures containing half-developed to well-developed micrometer-scale papilla or spheres and nanometer-scale folds depending on the thickness of the primary membranes. The bottom surfaces of thinner PLA membranes with primary thicknesses of 100–200 micrometers containing half-developed smaller microspheres and a wider gap space could firmly pin water droplets even upside down with an extremely high adhesion force of about 118–132 μN with water drop breakup, while the bottom surfaces of thicker PLA membranes with a primary thickness of 300–500 micrometers containing larger well developed microspheres with narrower gap space could allow the rolling of water droplets with lower adhesion forces of 74–99 μN. Strategies were developed to create patterned PLA quasi-superhydrophobic membrane surfaces with zoned water droplet adhesion properties for controllable micro-droplet transportation and potentially image encrypting applications.
研究领域:
材料科学
·
高分子化学
·
表面工程
·
生物材料
·
微流控
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DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 6
·575
·
IF 2.935
Zicong Zhao,Bintian Li,Liqun Xu,Yan Qiao,Feng Wang,Qingyou Xia,Zhisong Lu
Electrospun nanofiber mats have been used as sensing elements to construct piezoresistive devices due to their large surface area and high porosity. However, they have not been utilized as skin-contact supporting layers to package conductive nanofiber networks for the fabrication of piezoresistive sensors. In this work, we developed a sandwich-structured pressure sensor, which can sensitively monitor human motions and vital signs, with electrospun nanofiber mats as supporting, sensing, and packaging layers. The nanofiber mats were prepared by electrospinning with biocompatible poly (l-lactide) (PLA), silk fibroin (SF), and collagen (COL) as raw materials. The synthesized PLA–SF–COL mat possesses a non-woven structure with a fiber diameter of 122 ± 28 nm and a film thickness of 37 ± 5.3 μm. Polypyrrole (PPy) nanoparticles were grown in-situ on the mat to form a conductive layer. After stacking the pristine and conductive mats to form a PLA–SF–COL mat/(PPy-coated mat)2structure, another layer was electrospun to pack the multilayers for the construction of a sandwich-structured piezoresistive sensor. The as-prepared device can sensitively detect external pressures caused by coin loading and finger tapping/pressing. It can also tolerate more than 600 times of pressing without affecting its sensing capability. The human body-attached experiments further demonstrate that the sensor could real-time monitor finger/arm bending, arterial pulse, respiration rate, and speaking-caused throat vibration. The electrospinning-based fabrication may be used as a facile and low-cost strategy to produce flexible piezoresistive sensors with excellent skin-compatibility and great pressure sensing capability.
研究领域:
材料科学
·
柔性电子学
·
可穿戴传感器
·
生物医学工程
·
纳米技术
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 9
·1-17
·
IF 2.8
Shen Yunda,Jin Bingrui,Ren Liang,Gan Hongnian,Li Jiankun,Zhao Dan,Shen Huizhong,Zhang Mingyao
Synergistically integrating poly(butylene adipate-co-terephthalate) (PBAT) with polylactic acid (PLA) presents an economical strategy to develop biodegradable materials by leveraging their complementary characteristics. However, the inherent phase incompatibility between PBAT and induces severe interfacial defects, fundamentally limiting the development of high-strength biodegradable composites. In this study, glycidyl methacrylate (GMA) is grafted onto PBAT through reactive blending during the melting process, whereupon PLA/PBAT-g-GMA blends are prepared by means of an in-situ compatibilization approach, in an attempt to achieve PLA/PBAT blends with satisfactory comprehensive properties. The effects of PBAT content and GMA grafting rate on the interfacial compatibility, microstructure, mechanical properties, thermal performance, crystalline behavior and rheological processability of PLA/PBAT blends are investigated in detail. Systematic research has shown that the compatibility of PLA/PBAT blends has been significantly improved by implementing reactive compatibilization methods, and when the PBAT-g-GMA (2.84, the number refers to the grafting rate of GMA) content is 40%, the impact strength of the blend can reach 961 J/m without affecting rigidity, which indicates that our work proposes an effective approach to fabricate high-toughness PLA/PBAT blends through simple, environmentally friendly, and low-cost processing methods. Furthermore, the PLA/PBAT blends exhibit enhanced crystallization behavior while showing a slight decrease in thermal performance. The rheological analysis shows that the storage modulus, loss modulus, and complex viscosity significantly increase with the increase of PBAT content and GMA grafting rate, which improves processing performance of blends. SEM shows that as the grafting rate of GMA increases, the particle size distribution of PBAT becomes smaller and more uniform.
研究领域:
材料科学
·
高分子科学与工程
·
生物可降解高分子
·
复合材料
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高影响因子
Nano Research
·
2021
·Vol. 15
·期 2
·1183-1192
·
IF 8.897
Xu Yudi,Ma Sheng,Zhao Jiayu,Si Xinghui,Huang Zichao,Zhang Yu,Song Wantong,Tang Zhaohui,Chen Xuesi
Certain chemo drugs have been reported to potentially induce tumor-specific immune recognition by triggering immunogenic cell death (ICD), which provides a promising alternative way for cancer immunotherapy. However, the immunogenic effects of such treatments are still weak and robust systemic antitumor immune responses are rarely seen when these agents were used alone. Herein, we proposed a trinity immune enhancing nanoparticles (TIENs) for boosting antitumor immune responses of chemo agents. The TIENs was constructed with Food and Drug Administration (FDA) approved polylactic acid (PLA), canonical proton-sponging cationic polymer polyethyleneimine (PEI), and Toll-like receptor 9 (TLR9) agonist cytosine phosphate guanine oligodeoxynucleotide (CpG-ODN). In in vitro studies, the TIENs was proved to (1) promote antigen capturing, (2) antigen-presenting cells (APCs) activation, and (3) antigen cross-presentation. In in vivo studies, intratumorally injected TIENs greatly enhanced antitumor effect and robust immune responses of oxaliplatin and doxorubicin in murine CT26 and 4T1 tumor models, respectively. Furthermore, after decoration with a detachable shielding, the TIENs was proved to be effective in promoting the antitumor effects of chemo agents after intravenous injection. The combination of TIENs with clinically widely used chemo agents should be meaningful in boosting effective antitumor immune responses and cancer therapy.
研究领域:
癌症免疫疗法
·
纳米医学
·
化疗
·
免疫学
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DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2025
·
IF 6.1
Zichen Cui,Tian He,Shuo Zhang
Polylactic acid (PLA), as a bioplastic, is extensively utilized in bone tissue engineering for its biocompatibility, adaptability and affordability. However, the toxicological research of PLA is still limited. The hydrolysis products of PLA induced inflammatory response which caused inflammatory osteolysis mediated by oxidative damage through the recruitment of macrophages and the accumulation of foreign body multinucleated giant cells, ultimately leading to the failure of bone tissue regeneration. The lack of effective treatments highlights the importance of finding new therapies. This study systematically investigated the potential molecular mechanisms of PLA-induced inflammatory osteolysis by employing network toxicology and molecular docking techniques. We first conducted a network toxicology-based assessment according to the molecular structure of PLA. The result from integrating and screening targets from multiple databases identified 126 potential targets associated with PLA-induced inflammatory osteolysis, and then an interaction network diagram of the targets was constructed. Gene ontology (GO)/KEGG enrichment analysis clarified that PLA may cause inflammatory osteolysis via metabolic pathways and pathways in cancer, as well as lipid and atherosclerosis. Further analysis by STRING and Cytoscape software screened 25 core targets including HSP90AA1, AKT1, SRC, STAT1 and FYN. We found that the enriched highly correlated pathways covered 18 of the 25 core targets, supporting the scientific hypothesis that PLA induces inflammatory osteolysis. Moreover, the results of molecular docking confirmed that PLA displayed a strong binding ability with the core targets and formed stable binding. Taken together, this study not only revealed the potential biological mechanism of PLA-induced inflammatory osteolysis, but also provided new evidence for the future prevention and treatment of PLA-induced inflammation.
研究领域:
生物医学工程
·
毒理学
·
分子生物学
·
生物信息学
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DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Bo Wen,Gaopeng Wang,Renze Xu,Chenglong Weng,Jintao Yang
With the growing global emphasis on environmental protection, supercritical CO 2 foaming technology for biodegradable materials such as polylactic acid (PLA), poly(butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS) and their blends has emerged as a research and application hotspot. However, the low melt strength and poor compatibility of these polymers often lead to low nucleation efficiency, cell wall rupture and coalescence, exhibiting inferior foaming performance. In this work, aiming to enhance the foamability of PLA and PLA/PBAT blends, a fluorinated chain extender, F-CE (GMA-co-DFHA-co-MMA), was designed and synthesized. Through the reactive melt blending, F-CE effectively enhanced the melt strength of PLA and interfacial adhesion between PLA and PBAT, leading to a significant improvement in foaming performance. Additionally, the fluorine groups in DFHA demonstrated high affinity for CO 2 , providing additional heterogeneous nucleation sites for bubble formation, thereby increasing both foam expansion ratio and cell density. Notably, the F-CE/PLA foam exhibited a cell diameter of ∼13.8 μm with an exceptionally high expansion ratio of ∼35. As a contrast, pristine PLA foam shows an expansion ratio of ∼30, but with large cell diameter (∼118 μm). Although PLA foam containing CE without fluorine (CE/PLA foam) exhibits small cells with an average cell diameter of ∼13.6 μm, the expansion ratio is low (∼23). In addition, F-CE also exhibits superior performance in improving the foamability of PLA/PBAT blends. This work presents a chain extender specifically engineered for foaming applications, which functions as a highly efficient foaming additive to holistically enhance the foaming performance of polymers.
研究领域:
高分子科学
·
材料工程
·
绿色化学
·
发泡技术
·
超临界流体加工
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DOI
高影响因子
危险品化学品经营许可证（带存储）