PROGRESS IN ORGANIC COATINGS
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2024
·
IF 6.5
Mengnan Yu,Rongzhan Liu,Yanwei Du,Zhenyu Ni
Cotton fabric is widely used for its excellent wearability but often suffers from drawbacks such as poor stain resistance, susceptibility to corrosion, and low colorfastness. Here, we introduce a novel method to create colorful superhydrophobic cotton fabric using octadecylamine-modified dialdehyde cellulose (DAC/ODA) particles as building units, which are synthesized via a Schiff base reaction and subsequently dyed with active dyes. Leveraging the film-forming ability of ODA and the affinity between cellulose materials, DAC/ODA formed a robust coating on the cotton surface, with its microstructure precisely controlled through thermal induction. The resulting fabric (DAC/ODA/Cotton) exhibited exceptional superhydrophobicity, with a water contact angle of 155° and an osmotic pressure of 426.2 mm. The uniform coverage of DAC/ODA on cotton fibers also ensured high air permeability (33.1 mm/s). Additionally, DAC/ODA/Cotton demonstrated outstanding antifouling performance against various common liquids and water can easily remove dust from its surface. Importantly, the fabric maintains its superhydrophobicity under extreme conditions such as high temperature, UV radiation, and acid-base exposure. Even after 100 abrasion cycles, no significant changes in surface morphology and color on DAC/ODA/Cotton were observed. This fluorine-free, environmentally friendly approach offers significant potential for developing multifunctional textiles and coatings with broad applications while reducing environmental impact.
研究领域:
材料科学
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纺织工程
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环境科学
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产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2024
·
IF 3.5
Chunxia Yang,Hailong Cao,Fengyun Su,Mengzhen Tian,Haiquan Xie,Yezhen Zhang,Xiaoli Jin,Xin Li,Zhengdao Li
Photocatalytic H 2 evolution by water splitting is a promising approach to address the challenges of environmental pollution and energy scarcity. Graphitic carbon nitride (g-C 3 N 4 ) has emerged as a star photocatalyst because of its numerous advantages. To address the limitations of traditional g-C 3 N 4 , namely its inadequate visible light response and rapid recombination of photogenerated carriers, we employed a schiff base reaction to synthesize −C=N− doped g-C 3 N 4 . The introduction of −C=N− groups at the bridging nitrogen sites induced structural distortion in g-C 3 N 4 , facilitating n-π* electronic transitions from the lone pair electrons of nitrogen atom and extending light absorption up to 600 nm. Moreover, the presence of heterogeneous π-conjugated electron distribution effectively traps photogenerated electrons and enhances charge carrier separation. Benefiting from its expanded spectral response range, unique electronic properties, increased specific surface area, the doped g-C 3 N 4 exhibited outstanding photocatalytic H 2 evolution performance of 1050.13 μmol/g/h. The value was 5.9 times greater than the pristine g-C 3 N 4 .
研究领域:
材料科学
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能源科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Qiansen Wang,Cong Jiang,Hong Wang,Xingming Jin,Yehan Tao,Jie Lu,Jian Du,Haisong Wang
The development of sustainable agriculture has boosted an increase in demand for biodegradable and multifunctional biomass-based mulch films. Herein, a sort of eco-friendly and multifunctional soybean protein isolates crosslinked gelatins (SPI-c-Gel) composite mulch films were elaborately designed through the Schiff base reaction. The formation of physical entanglement and chemical cross-linking between the molecular chains of SPI and Gel could effectively dissipate the loading energy and thereby strengthen the resistance of the composite mulch films to water penetration. Specifically, the maximum tensile strain and tensile stress were observed to increase from 4.05 MPa at 73.3 % for pure SPI film to 14.7 MPa at 151 % for optimized SPI-c-Gel 0.3 mulch film. The swelling rate in water declined from 280 % for pure SPI film to 141 % for SPI-c-Gel 0.3 composite film. Furthermore, the fabricated composite mulch film exhibited satisfied water retention, urea slow-release properties, and biodegradability. The application experiments of SPI-c-Gel 0.3 composite mulch have shown that the seeds grew faster when cabbage seeds were covered by such mulch film during seed germination. Our findings provide a novel strategy for regulating the physical and chemical properties of biopolymer-based multifunctional mulch films, which may be employed to promote the development of sustainable agriculture.
研究领域:
农业科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Siyuan Tang,Da Chen,Yongsheng Yang,Changxing Wang,Xiameng Li,Yiru Wang,Chenjie Gu,Zhen Cao
Developing environmental-friendly and low-cost strategies of synthesizing red-emission graphene quantum dots (R-GQDs) is a considerable challenge. Herein, we present the green and facile preparation of R-GQDs by using o-phenylenediamine (o-PD) and catechol as precursors via oxidation/polymerization and Schiff base reaction at low temperature (80 °C) for 3 hrs. Results show that the prepared R-GQDs exhibit triple fluorescence emissions , which is enabled by the introduce of different nitrogen (pyrrolic N, pyridinic N, and amino N) species on the surface of R-GQDs. Moreover, the R-GQDs are implemented to detect the moisture in different organic solvent . A highly sensitive ratiometric sensing of water in organic solvents is achieved, and the relationship between the change of fluorescence signal caused by moisture and the corresponding internal emission site is also determined. In the end, the multicolor light emissions of R-GQDs are realized by simply adjusting the polarity of surrounding solvents. And based on the solvatochromism of R-GQDs, the multicolor solid fluorescent powder and ink are prepared for illumination application. All in all, the above research work presents a novel R-GQDs for wide application in detecting and illumination.
研究领域:
材料科学
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环境科学
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分析化学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
De-qiang Li,Maryamgul Tohti,Yong-sheng Fu,Yue Zhang,Zi-wei Xiong,Jun Li,Yan-Feng Guo
Periodate oxidation has been the widely accepted route for obtaining aldehyde group-functionalized polysaccharides but significantly influenced the various physicochemical properties due to the ring opening of the backbone of polysaccharides. The present study, for the first time, presents a novel method for the preparation of aldehyde group-functionalized polysaccharides that could retain the ring structure and the consequent rigidity of the backbone. Pectin was collected as the representative of polysaccharides and modified with cyclopropyl formaldehyde to obtain pectin aldehyde (AP), which was further crosslinked by DL-lysine (LYS) via the Schiff base reaction to prepare injectable hydrogel. The feasibility of the functionalization was proved by FT-IR and 1 H NMR techniques. The obtained hydrogel showed acceptable mechanical properties, self-healing ability, syringeability, and sustained-release performance. Also, as-prepared injectable hydrogel presented great biocompatibility with a cell proliferation rate of 96 %, and the drug-loaded hydrogel exhibited clear inhibition of cancer cell proliferation. Overall, the present study showed a new method for the preparation of aldehyde group-functionalized polysaccharides, and the drug-loaded hydrogel has potential in drug release applications.
研究领域:
生物材料学
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药剂学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Qingxiu Liu,Jie Liu,Shufa Qin,Ying Pei,Xuejing Zheng,Keyong Tang
This work prepared high mechanical strength gelatin composite hydrogels reinforced by cellulose nanofibrils with unique beads-on-a-string morphology. In detail, cellulose nanofibrils (H-Cel) with unique beads-on-a-string morphology were obtained by acid hydrolysis followed by intensive sonication. The D-H-Cel nanofibrils were prepared through oxidizing part of the non-esterified hydroxyl groups on the H-Cel into aldehyde groups. D-H-Cel were then mixed with gelatin and D-H-Cel/Gel composite hydrogels were produced. During the mixing, a giant network structure was constructed through the Schiff-base reaction between the aldehyde groups on the surface of D-H-Cel nanofibrils and the primary amino groups on gelatin macromolecular chains. Since the cellulose nanofibrils were covalently bonded to gelatin, the stress could be efficiently transferred between the reinforcing agent and matrix, resulting in a composite hydrogel with drastically increased mechanical strength. The compressive strength of D-40H-Cel/Gel hydrogel reached 3.398 MPa. SEM images showed a highly porous three-dimensional structure in the hydrogel with regulated pore size. The crosslinking indices were measured with ninhydrin assay. The composite hydrogels could maintain their shape well in buffer solution . The present work shows that natural polymer-based composite hydrogels with extremely high mechanical strength could be obtained by reinforcing with surface modified cellulose nanofibrils with unique beads-on-a-string morphology.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2025
·Vol. 59
·期 4
·1-25
·
IF 3
Ding Jiarong,Tian Shiyu,Hu Zewen,Zhao Aichen,Liu Yu,Zhu Xiaodong
Formaldehyde released from particleboard poses a serious threat to indoor air quality, and there is an urgent need to develop efficient adsorbents to reduce its release. This study introduces micro-nano chitosan (multiscale chitosan cross-linked polymers, MNCs) as a novel adsorbent, synthesized via ionic gelation and systematically characterized in terms of their specific surface area (0.301 m 2 /g), average particle size (19.96 μm), spherical morphology, and surface functional groups. The formaldehyde emission from particleboard treated with 3% MNCs was found to be reduced to 70.7% of that of the control group on day 28 by the 1 m 3 climate chamber experiment, which was a significant emission reduction effect. The adsorption kinetic analysis showed that the adsorption of formaldehyde by MNCs conformed to the pseudo-second-order adsorption kinetic model, and its chemical adsorption mechanism was attributed to the Schiff base reaction between the amino group on the chitosan ring and formaldehyde. In the C-history experiment, the C m0 of control panel was measured to be 1.94 × 10 5 mg/m 3 and D m to be 2.7 × 10 −8 m 2 /s, whereas after treatment with 3% MNCs, the C m0 ' was reduced to 0.29 × 10 5 mg/m 3 , the D m ' was reduced to 4.31 × 10 −10 m 2 /s and the partition coefficient K was enhanced from 243.9 to 855.5 in the original panels, indicating that the addition of MNCs significantly inhibited the diffusion of formaldehyde, enhanced the retention capacity of formaldehyde in the particleboards, and reduced the initial volatilizable formaldehyde reserves. This study provides theoretical basis and experimental support for the application of MNCs in the pollution control of wood-based panels, whose efficient emission reduction performance originates from the unique nanoporous structure and the active amino sites in chitosan molecules.
研究领域:
材料科学
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环境科学
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室内空气质量
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产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2016
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IF 3.42
Huinan Chen,Xiaodong Xing,Huaping Tan,Yang Jia,Tianle Zhou,Yong Chen,Zhonghua Ling,Xiaohong Hu
An antibacterial and biodegradable composite hydrogel dressing integrated with microspheres is developed for drug delivery and wound healing. The mechanism of gelation is attributed to the Schiff-base reaction between aldehyde and amino groups of oxidized alginate (OAlg) and carboxymethyl chitosan (CMCS). To enhance antibacterial and mechanical properties, tetracycline hydrochloride (TH) loaded gelatin microspheres (GMs) were fabricated by an emulsion cross-linking method, followed by integrating into the OAlg-CMCS hydrogel to produce a composite gel dressing. In vitro gelation time, swelling, degradation, compressive modulus and rheological properties of the gel dressing were investigated as the function of microsphere ratios. With increasing ratios of microspheres from 10 to 40 mg/mL, the composite dressing manifested shorter gelation time and lower swelling ratios, as well as higher mechanical strength. Comparing to other formulations, the gel dressing with 30 mg/mL microspheres showed more suitable stabilities and mechanical properties for wound healing. Also, in vitro drug release results showed that the loaded TH could be sustained release from the composite gel dressing by contrast with pure hydrogels and microspheres. Furthermore, powerful bacteria growth inhibition effects against Escherichia coli and Staphylococcus aureus suggested that the composite gel dressing, especially the one with 30 mg/mL GMs containing TH, has a promising future in treatment of bacterial infection.
研究领域:
生物材料学
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药剂学
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微生物学
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DOI
PubMed
高影响因子
MATERIALS LETTERS
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2019
·
IF 3.019
Ning Cao,Rujian Jiang,Lingwan Hao,Limei Tian,Ru Mo,Yong Fan,Jie Zhao,Luquan Ren
Herein, we report an effective bacterial anti-adhesive and bactericidal coating based on a Schiff-base reaction. The hydrophilic polyoxyethylene-bis-amine (PEG-bis-amine) is introduced in the system to endow the coating with valid bacterial anti-adhesive performance, while the tobramycin (Tob) with multi-amines serves as both a bactericidal agent and one of the cross-linkers for the construction of polyimide networks. The coating is obtained via a facile solvent-annealing method. This type of dual-functional antibacterial coating may provide as an excellent antibacterial platform for broad applications in bactericidal surfaces.
研究领域:
材料科学
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生物医学工程
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微生物学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Hao Yang,Hong Wu,Ziang Xu,Bowen Mu,Zhongxin Lin,Xuanxuan Cheng,Guanhua Liu,Fusheng Pan,Xingzhong Cao,Zhongyi Jiang
By mimicking the respiratory system in organisms, hybrid membranes with hierarchical pore structures were constructed by covalent organic nanosheets (CONs) and poly(ether sulfone) (PES). Two kinds of amide modified CONs, TpPa-1 and TpBD, with different pore sizes were facilely synthesized by the Schiff base reactions of 1,3,5-triformylphloroglucinol (Tp) with p-phenylenediamine (Pa-1) and benzidine (BD), and separately incorporated into the PES. The hierarchical pore structures within the hybrid membranes including micropores (0.278–0.289 nm), mesopores (2–50 nm) and macropores (1–10 µm) were generated by the addition of CONs. The microporous structures in top dense layer with high separation accuracy arose from CONs and PES chains. The mesoporous structures and the macroporous structures in porous sublayer with ultralow resistance arose from sponge-like pores and finger-like pores of PES, respectively. A smooth transition of micro-, meso- and macroporous structures rendered the membranes desired level of separation efficiency as well as high stability. Remarkably, the hybrid membrane consisting of TpPa-1 CONs (8 wt%) showed a high water/ethanol separation factor of 1150, while the membrane consisting of TpBD CONs (8 wt%) exhibited a high water/n-butanol separation factor of 2735. The permeation fluxes for both separation systems were higher than 2.5 kg m -2 h -1 . The links between hierarchical architectures and performance in membranes could facilitate the rational design of novel membrane architectures with advanced properties.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Yutong Hou,Aiyuan Jia,Xueming Qin,Xinru Yang,Jiayin Xie,Xiaoyu Li,Yongsheng Zhao
Dye pollution is becoming increasingly severe. This study used the Schiff base reaction to synthesize a polyaromatic ring covalent organic polymer material with amide bonds and high electronegativity named SLEL-9 to adsorb Methylene Blue (MB) and Rhodamine B (RhB). SLEL-9 was characterized by Fourier transform infra-red spectra, X-ray photoelectron spectra, Brunauer-Emmett-Teller (BET), zeta potential analysis, and other techniques. It was found that SLEL-9 material contains C–C, C N, C–N, and C O. SLEL-9 had a zeta potential of about −45 mV under neutral conditions, which proved that the material had been synthesized successfully. The BET and Langmuir surface areas of SLEL-9 were 35.187 m 2 g −1 and 56.419 m 2 g −1 , respectively. The adsorptions of SLEL-9 on low concentration (10 mg L −1 ) Methylene Blue and Rhodamine B reached equilibrium within 48 h. The results showed that SLEL-9's adsorption of dye molecules are more consistent with pseudo-second-order kinetic and Langmuir isotherm model. The adsorption experiments showed that the adsorption process is a spontaneous endothermic reaction, mainly chemisorption. The maximum adsorption capacity of SLEL-9 for MB and RhB were 132.45 mg g −1 and 101.94 mg g −1 . In addition, this study investigated to determine the optimal reaction parameters. The primary mechanisms of SLEL-9 adsorption of two dyes are n→π* interaction, π-π EDA interaction and electrostatic attraction. Selective adsorb ability experiment results showed that SLEL-9 could selectively adsorb MB and RhB to a certain extent. Finally, it was found that SLEL-9 can maintain over 70% adsorption capacity after five reuses and can maintain stability after soaking in different pH water and organic solvents for 120 h. SLEL-9 proved to be a promising organic covalent polymer adsorption material for the removal of Methylene Blue and Rhodamine B in water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
AUSTRALIAN JOURNAL OF CHEMISTRY
·
2017
·Vol. 71
·期 1
·74-79
·
IF 1.267
Xueying Sheng,Xian Li,Mengting Li,Renyi Zhang,Shuang Deng,Wangkai Yang,Guanjun Chang,Xu Ye
A series of injectable hydrogels was prepared by cross-linking oxidized carboxymethyl cellulose (oxi-CMC) with polyacryloyl hydrazide (PAH) via a Schiff base reaction under physiological conditions. The hydrogels exhibited superior performance such as appropriate rheology properties, high swelling ratio, and low degradation rate. In phosphate buffer solution (PBS, pH 7.4) at 37°C, the swelling ratio of the hydrogels ranged from 19 to 28 after 7 h, the degradation percentage of the oxi-CMC6/PAH3 hydrogel was ~47 % after 20 days. Using bovine serum albumin (BSA) as a model protein drug, the results of in vitro drug release studies demonstrated that the sustained release of BSA could be cooperatively controlled through drug diffusion and hydrogel degradation in PBS (pH 7.4) at 37°C, and the cumulative release percentage of BSA from a drug-loaded oxi-CMC6/PAH3 hydrogel was ~88 % after 8 days. The results signified that oxi-CMC6/PAH3 hydrogel could be potentially applied in the fields of drug delivery vehicles, tissue engineering, and cell encapsulation materials.
研究领域:
生物材料学
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药物递送系统
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组织工程学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）