CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Wen Wen Deng,Ze Ping Zhang,Min Zhi Rong,Ming Qiu Zhang
To impart processability and practical serviceability to organic room temperature phosphorescence (RTP) molecules, and address phase separation and rigid confinement environment of conventional RTP polymers, a small amount of Schiff base bonds crosslinked tetraphenylene luminescence networks are pinned to the borate ester bonds crosslinked epoxy networks producing reversible interlocked polymer networks-based halogen-free RTP material. By taking advantage of the conjugation interaction of Schiff base linkages, and phase separation inhibition/molecular confinement effects of the interlocking networks, excellent fluorescence quantum yield (up to 78.9 %), RTP lifetime (660 ms) and quantum yield (16.7 %) are achieved with ultra-low concentration of luminophores (0.05 wt%). Moreover, the resultant acquires decent tensile strength (3.8 MPa) and a high elongation-at-break (365 %) owing to its unique molecular design. The phosphorescence lifetimes (457 ∼ 602 ms) are only slightly affected even after cyclic stretching (at 50 % strain for 100 cycles), or soaking in water (for 30 days), or heating (90 °C). The built-in reversible covalent bonds and the topological network reorganization further enable injection molding and self-healing of the material. Having been repeatedly crushed/hot-pressed, the recycled material still shows RTP lifetime and quantum yield of 398 ms and 14.6 %, respectively. The present work provides a feasible approach to fabricate multifunctional robust organic phosphorescent materials with application prospects.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
Food Packaging and Shelf Life
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2024
·
IF 8.5
Fuyuan Ding,Ruike Wu,Xiaowei Huang,Jiyong Shi,Xiaobo Zou
In this study, we developed composite films by crosslinking gelatin with oxidized alginate and anthocyanin through Schiff base linkage, electrostatic interaction and hydrogen bonds. Physicochemical properties of the films can be adjusted by changing the concentration of oxidized alginate. The tensile strength of the film containing 10 wt% oxidized alginate reached 45 MPa, surpassing that of films with 1 wt% and 3 wt% oxidized alginate. As the concentration of oxidized alginate increased, the swelling ratio of the films decreased. The release rate of anthocyanin from the film with 10 wt% oxidized alginate in pH 7.0 water was 15.3%, significantly lower than that of the film lacking oxidized alginate (release rate 42.1%). The antioxidant properties of the composite gelatin films with anthocyanin were about 40% in DPPH radical scavenging activity. Additionally, the color of film with 3 wt% oxidized alginate changed from light pink to green in a solution with a pH range from 3 to 11 and the film was sensitive to acidic or basic vapors. This color-changing capability makes the film a potential indicator for detecting spoilage in fish, pork, and chicken, manifesting color changes from light pink to light green. Furthermore, the composite films exhibited biodegradable characteristics in soil, lakes, and simulated seawater. Notably, the film containing 10 wt% oxidized alginate demonstrated greater stability compared to the film without oxidized alginate. The gelatin film with pH responsive and biodegradable properties can be potentially used in the field of intelligent food packaging.
研究领域:
食品科学
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材料科学
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生物化学
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产品关联
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
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2020
·Vol. 305
·期 9
·2000188
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IF 3.853
Lvyang Wang,Mengya Li,Xiumin Li,Jie Liu,Yajie Mao,Keyong Tang
In this work, a gelatin (Gel)-oxidized gellan gum (OG)/amino hydroxyapatite (mHap) hybrid hydrogel with Schiff base linkages is reported. The mHap is obtained by modifying hydroxyapatite with tetraethyl orthosilicate and 3-aminopropyl-triethoxysilane. The effects of different mHap contents on the structure, morphology, and properties of hydrogels are particularly investigated. Scanning electron microscopy coupled with energy dispersion spectroscopy reveals that mHap of around 100 nm is uniformly distributed inside the hydrogel with interconnected porous structures. Notably, the hydrogel with 1 wt% mHap possesses the highest compressive stress (2.01 ± 0.10 MPa) at 90% strain, as well as the lowest equilibrium swelling ratio (97% ± 5%) and degradation rate than other hydrogels. Besides, an ultra-high compressive stress equivalent to 91% of the initial stress can be obtained by this hydrogel after 50 loading-unloading cycles (85% strain). Meanwhile, after being swollen, this improved hydrogel also exhibits better structural stability than Gel-OG hydrogel. The in vitro 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay further shows that all hydrogels are nontoxic against mouse fibroblasts. This work provides a biomimetic strategy to construct the organic/inorganic hydrogels with excellent interactions, elasticity, reversibility, and biocompatibility, which is of great importance for the practical applications in cartilage tissue engineering.
研究领域:
生物材料学
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组织工程学
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DOI
高影响因子
ACS Applied Polymer Materials
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2025
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IF 4.7
Zhouyuanye Wan,Hongjie Zhang,Meihong Niu,Yanzhu Guo,Haiming Li
The digital light processing (DLP) 3D printing technology enables the construction of hydrogels with high precision and complex structures. In this work, a hydrogel precursor solution with excellent printing performance was developed through a chemical and physical dual cross-linking strategy. The printed poly(acrylamide–acrylic acid)/N,N′-bis(vanillinidene)ethylenediamine1–carbomer1 (P(AM–AA)/N,N′-BVE1–CBM1) hydrogel exhibited excellent tensile strain (685%), tensile strength (0.37 MPa), Young’s modulus (157 kPa), and toughness (1075 kJ/m3), as well as good adhesion properties and self-healing ability. Notably, its shape memory properties enable it to recover quickly after deformation and show excellent strain response characteristics, enabling reliable and stable conversion of human motion into electrical signals, and it is very suitable as a flexible sensor for monitoring human body motion. With remarkable precision and customization ability to fabricate unique structures and excellent response behavior, the P(AM–AA)/N,N′-BVE1–CBM1 hydrogel based on DLP 3D printing is promising in the field of personalized wearable flexible sensors.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2019
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IF 6.044
Shouping Xu,Hao Li,Huan Ding,Zhouxiang Fan,Pihui Pi,Jiang Cheng,Xiufang Wen
Smart hydrogels with dual network were presented since a new allylated chitosan was conceived. As a double network hydrogel, its first network consisted of poly( N -isopropylacrylamide) worked as the gel matrix, and its second network with Schiff base bond enabled itself function as a molecular switch through the formation and break of the bond. When only the intestinal fluid was used, the second network could provide efficient protection for the loaded drug, and the drug release mechanism conformed to the non-Fickian type diffusion. While pre-treated with simulated gastric fluid, the switch would be opened and the mechanism was the Fickian type, which increased the cumulative percentage of drug release by about 25% and the release time by about 300 min. Besides, the hydrogel was characterized by 1 H NMR, FT-IR and SEM. The effects of allylated chitosan, pH and crosslinker on the swelling ratio and morphology of hydrogel were also studied.
研究领域:
材料科学
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生物医学工程
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药剂学
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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）