JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2024
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IF 3.6
Hongxia Chen,Hao Zhou,Zhiwen Qi,Xingying Xue,Chengzhang Wang
There have been studies published on the composition and coating uses of raw lacquers following enzymatic oxidative polymerization. The change of urushiol’ thermal stability and biological activity following polymerization to create oligomer, however, has received little attention. This work using silica gel column chromatography to separate urushiol and urushiol oligomer from polymerized raw lacquer and assessed its antibacterial, antioxidant, and thermal stability in an effort to decrease the allergenicity of urushiol and increase its application. By using gel chromatography, the urushiol oligomer were discovered to be polymers with 2–5 degrees of polymerization. According to characterization results from techniques like UV, FT-IR, and 1H NMR, urushiol was converted into urushiol oligomer by addition reactions, and C–C coupling. The findings demonstrated that the urushiol oligomer’ IC50 values for scavenging DPPH and ABTS free radicals were 40.8 and 27.4 μg/mL, respectively, and that their minimum inhibitory concentrations against Staphylococcus aureus and Staphylococcus epidermidis were 250 and 125 μg/mL. The urushiol oligomer’s thermogravimetric differential curve peak temperature (461.8 °C) was higher than urushiol’s (239.5 °C), indicating that urushiol undergoes polymerization with enhanced thermal stability. The study’s findings establish a foundation for the use of polymerized urushiol and urushiol oligomer in applications including functional materials and additives.
研究领域:
材料科学
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生物化学
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DOI
PubMed
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2024
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IF 3.1
HongXia Chen,Hao Zhou,Zhiwen Qi,Xingying Xue,ChengZhang Wang
Toxicodendron vernicifluum bark has been used for many years as a component in foods and as a traditional herbal medication. Unfortunately, the presence of urushiols, which induce allergies, limits its application. This study used a vortex-blending matrix solid-phase dispersion microextraction technique to extract urushiols from Toxicodendron vernicifluum bark. HPLC was used to evaluate the amounts of the extracted urushiols (15:0, 15:1, 15:2, and 15:3). The modified magnetic adsorbent was prepared through an in situ coprecipitation method and characterized using a variety of techniques. The optimized extraction conditions are as follows: using magnetic Zeolite Socony Mobil-Five as an adsorbent, a 1:2 sample/adsorbent ratio, 2.5 min of vortex-blending time, 4 mL of 0.1% (V/V) trifluoroacetic acid-methanol as the elution solvent and 8 min of ultrasound time. There was good linearity and high repeatability in the method. Furthermore, the limits of detection for the urushiols ranged from 0.20 to 0.50 μg/mL. Under the optimized conditions, 50 compounds were identified by ultra high performance liquid chromatography and quadrupole time-of-flight mass spectrometry. These compounds included 8 phenolic acids, 9 monomeric urushiols, 11 urushiol dimers, 10 other components, and 11 flavonoids. The suggested approach, which has the advantages of few stages and high extraction efficiency over existing extraction procedures, is a potentially useful method for obtaining and evaluating urushiols in raw materials or extracts.
研究领域:
植物化学
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分析化学
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药物化学
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2022
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IF 6.206
Jiulong Sun,Xinzhe Xiao,Guozhe Meng,Lin Gu
Boron nitride nanosheets (BNNSs), a two-dimensional (2D) insulator material with outstanding barrier properties, are prone to aggregation owing to π-π interaction, which limits their use in heavy anti-corrosive coatings. In this work, urushiol (Ur), a cheap and easily available natural compound, was employed to modify BNNSs via interacting catechol groups of Ur with the surface of BNNSs inspired by mussel, which was proved by UV–vis, Raman, FTIR , and XPS . Synthesized BNNSs@Ur exhibited high hydrophobicity and dispersibility in solvents and epoxy coatings (EP), which enhanced the compatibility between the BNNSs and matrix. Electrochemical impedance spectroscopy (EIS) clearly manifested that the impedance at low frequency (|Z| f = 0.01 Hz ) of the polymeric coating containing 0.75 wt% BNNSs@Ur was about two orders of magnitude higher than that of pure EP coating immersed in 3.5 wt% NaCl solution for 50 days. Characterization of corrosion products also evidenced that the modified BNNSs significantly enhanced the anticorrosive resistance of EP coatings via the improved barrier performance and corrosion inhibition effect of Ur, which is supposed to be extensively used as nano-reinforcing fillers in the field of corrosion protection .
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
E-POLYMERS
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2023
·Vol. 23
·期 1
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IF 3.7
Xiaoyu Jie,Bing-Chiuan Shiu,Huazhong Wu,Yuchi Zhang,Yuansong Ye,Chunxiang Lin,Run Fang
Chitosan (CS) is widely used in the treatment of wastewater containing metal ions. However, the poor stability in acidic aqueous solutions severely limits its application in many practical scenarios. In this work, a CS-based composite nanofiber membrane was prepared by electrospinning using urushiol, a natural biomaterial, as the cross-linking agent. The application of the CS-urushiol (CS-U) membrane in the adsorption and recovery of Cr( vi ) in wastewater was systematically studied. The CS-U membrane showed great resistance to strongly acidic and oxidative environments, and the adsorption process combined two mechanisms of electrostatic attraction and redox reaction. Due to the nanoscale fibers, porous structure, and strong acid resistance, the CS-U membrane adsorbed Cr( vi ) rapidly and efficiently in both batch and continuous modes. Moreover, the adsorption capacity and selectivity of the CS-U membrane for Cr( vi ) could be maximized simultaneously by adjusting the solution pH, promoting the recovery of high-purity Cr 2 O 3 .
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Hang Shen,Huawei Qiao,Huagui Zhang
The growing cost of petroleum derivatives and the increasingly stringent environmental regulations have led the adhesive industry to re-seek solutions from natural resources in the past decades. However, most currently available natural adhesives (e.g. polysaccharides) are conflicted with low performances such as weak adhesion and easy microbial degradation, etc. On the other hand, owning self-repairability has become a popular way for a new material to extend its lifetime, to reduce its environmental footprint, and to meet the increasing demands of smart functions. This is also true to adhesive industry with self-repairable adhesive highly desirable. In this work, plant resourced urushiol and industrial waste of elemental sulfur (S) was used to prepare sulfur-urushiol copolymers (IVurux) as a high-strength, self-repairable and antimicrobial adhesive through inverse vulcanization, a facile and green approach free of solvent and catalyst. The polymerization between unsaturated bonds of urushiol and sulfur in forming a reversibly crosslinked network with polysulfide segments has been verified by FTIR and 1 H NMR analysis. The adaptable covalent S-S bonds from polysulfide segments endow the copolymer networks with a distinct self-healing property, while the rich catechol groups from urushiol moiety guarantee the material with an outstanding adhesive property. The adaptable covalent networking was well validated by a distinct rubbery plateau in rheological measurements of both temperature ramping test and frequency sweep test. The crosslinking density was revealed to increase with sulfur content, with frequency scaling exponent of G’ in the plateau regime varying from G’∼ω 0.27 in IVuru70 (S content 30 wt%) to G’∼ω 0 in IVuru50 (S 50 wt%) and IVuru40 (S 60 wt%), while when S >60 wt% few unreacted sulfur presented in the product as indicated from XRD and DSC analysis. Moreover, the self-healing property was well demonstrated in a repeated breaking-healing cycle test with 92.7% recovery obtained after 4 breaking cycles for IVuru50, and the dynamic S-S bond exchange was studied by stress relaxation to be temperature dependent with an activation energy of metathesis ∼100 kJ/mol. Furthermore, the P(sulfur-r-urushiol)s were examined to exhibit a considerable adhesion strength ∼3.0 MPa, about 6 times of a commercial hide glue, with IVuru60 being the best as a balanced contribution between catechol groups and covalent networking for adhesive and cohesive bonding. Meanwhile, a very good self-repairability of the adhesive was demonstrated with heating being the trigger for S-S metathesis. Ultimately, the P(sulfur-r-urushiol) copolymers were found to be hydrophobic with a contact angle ∼ 85° and have an excellent antimicrobial activity against S. aureus and S. cerevisiae with a high inhibition efficiency >80% and >52%, respectively. Such a high-strength, self-repairable and antimicrobial adhesive material foresees promising applications in broad fields in light of its advantages of fabrication simplicity, environmentally friendliness and good durability.
研究领域:
材料科学
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化学工程
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生物医学
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2024
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IF 3.9
Zheng Lu,Zhu Jide,Chen Jipeng,Xu Yanlian,Jiang Lilong
The performance of silver nanoparticles (AgNPs) as highly efficient antimicrobial agents is limited by their agglomeration and instability. Environmentally friendly silver-based nanomaterials have attracted considerable attention, owing to the superior dispersion and antibacterial activity of AgNPs. In this work, polyurushiol (PUL) was used to modify an AgNPs-based material and prepare PUL-decorated AgNPs (PUL-AgNPs). The stability and dispersion of the composites varied with the reaction conditions. The PUL-AgNPs material showed higher antibacterial activity than the AgNPs, with minimum inhibitory concentration (MIC) values against E. coli and S. aureus of 3.13 mg/L ( p < 0.01) and 6.25 mg/L ( p < 0.01), respectively. PUL-AgNPs also showed inhibitory potential against three microalgae, P. tricornutum , I. zhanjiangensis , and N. closterium . The 72-h LC50 values of PUL-AgNPs for the three algae were 1.95, 1.89, and 4.07 mg/L, respectively. This study shows the promising potential of PUL-AgNPs for antibacterial and anti-microalgae applications, especially for marine antifouling. Graphical Abstract
研究领域:
材料科学
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微生物学
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环境科学
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DOI
高影响因子
RSC Advances
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2020
·Vol. 10
·期 24
·13936-13943
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IF 3.119
Lu Zheng,Yucai Lin,Donghui Wang,Jipeng Chen,Ke Yang,Binbin Zheng,Weibin Bai,Rongkun Jian,Yanlian Xu
Silver nanoparticle-based coatings have been regarded as promising candidates for marine antifouling. However, current toxic fabrication methods also lead to environment risks. Nanoparticle agglomeration, poor compatibility with polymer, and rapid release of Ag+ result in short-term efficacy. In this study, a facile one-pot synthesis method of silver nanoparticles (AgNPs) encapsulated in polymeric urushiol (PUL) was developed. AgNPs were synthesized in situ by natural urushiol, serving as a reductant, dispersant and surfactant. Simultaneously, silver nitrate catalyzed the polymerization of urushiol into PUL. This in situ reduction method made AgNPs uniformly distributed in the polymer matrix. The binding between the AgNPs and the PUL resulted in the stable release of Ag+. Results showed the antibacterial rate of a 0.1% AgNPs coating is 100% in laboratory experiments. This environment-friendly coating showed good microbial inhibition performance with long-term (120 days) marine antifouling efficacy. This study shows the potential of preparing an eco-friendly coating with long-term marine antifouling ability.
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
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Ying-Qi Dong,Wei-Bin Bai,Wen Zhang,Yu-Cai Lin,Rong-Kun Jian
Bio-based hydrophobic coating modified cotton fabrics with durable flame retardancy are of high interest in the application of oil-water separation for not only avoiding the use of hazardous substances but also improving the fire safety during use. Herein, phytic acid@Polyurushiol‑titanium complex coated cotton fabric was developed using the facile dip-coating method involving the sequential immersion in the solution of poly(ethyleneimine), phytic acid , titanium oxide, and urushiol. The underlying coating accommodated abundance of phytic acid, which imparted excellent flame retardancy to cotton fabric, and the top coating composed of the polyurushiol‑titanium complex endowed cotton fabric with high hydrophobicity that the water contact angle (WCA) was up to 149.8°. The hydrophobicity also guaranteed effective protection of the underlying phytic acid against chemical solvents and abrasion. Besides, the hydrophobic coating allowed cotton fabric for good self-cleaning and effective oil-water separation. Therefore, the preparation of phytic acid@polyurushiol‑titanium complex coated cotton fabric offers a promising approach to construct durable biomass-coated cellulose-based fabric with multifunctionality.
研究领域:
材料科学
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环境科学
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纺织工程
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2024
·
IF 6.5
Honghui Zeng,Chuhan Wan,Yuansong Ye,Yuchi Zhang,Huazhong Wu,Run Fang
The fabrication of micro/nano hierarchical structures is a crucial step in imparting super-wettability to materials. However, existing methods often suffer from drawbacks such as low efficiency, complex processes, and limited applicability. In this study, a simple one-step deposition process was employed to prepare a coral-like coating with a micro/nano hierarchical structure. This was achieved through the precipitation copolymerization of a renewable biomaterial, urushiol, with 1,6-hexamethylenediamine (HDA) in an ethanol solution. The reaction mechanism of the precipitation copolymerization and the formation of the deposited coating were investigated using chemical structure and surface morphology characterization. The study also examined the effects of various reaction conditions, including reactant ratios and solution pH, on coating morphology and hydrophobicity. Due to the unique functional groups and microstructures, the urushiol-HDA deposition modification imparted high hydrophobicity to various substrates without using low-surface-energy modifiers, demonstrating its broad applicability. Furthermore, secondary modifications of the deposited coating endowed the substrates with more diverse chemical structures and surface properties. Thus, the ease of preparation, broad applicability, and tunable modification effects make the urushiol-HDA deposition modification a promising method for creating super-wetting surfaces.
研究领域:
材料科学
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化学工程
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表面科学
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DOI
高影响因子
MATERIALS LETTERS
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2014
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IF 2.269
Longhui Zheng,Qinhui Chen,Baoling Chen,Jinhuo Lin
Janus materials with anisotropic chemical structure and physical properties have attracted increasing attention due to their diversified potential applications. However, existing organic parts of Janus particles mainly come from synthetic polymer . Urushiol is a kind of natural renewable product. Herein, we described the synthesis and functionalization of urushiol-titanium chelate polymer (UTi)-polystyrene (PS) Janus composite particles . The core@shell composite particles of PS@UTi was obtained through in-situ reaction between sulfonated polystyrene microspheres and UTi. UTi-PS Janus composite particles were synthesized by swelling assisted protrusion. Both of the two knobs of Janus particles could be modified. For example, polyaniline (PANi) could be favorably grown on the PS knob by specific interactions. Results of characterization indicated that the Janus composite particles of UTi-PS containing natural product have been synthesized and modified successfully. The modified product of UTi-PANi Janus composite particles is expected to serve as directional conductive material and heat-resistance polymer material.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Hang Shen,Siyi Li,Huagui Zhang
Lacquer is well recognized in the coating industry thanks to its excellent performance, artistic value, and renewable properties. However, there exists difficulty in curing thick lacquer film due to its dark color attributed to the phenol oxidation and the inertness of internal double bonds that are persistent in the cured films, which also reduces the thermal stability of the obtained film. Meanwhile, the slow manual curing process also limits its large-scale commercial use. To address the issues, in the current study, urushiol–urethane prepolymers were synthesized, characterized, and adopted as the foundation for transparent and thick lacquer film preparation through a fast and green thiol–ene click reaction with polymercaptan. By this mild and readily implemented method, flexible and transparent networked films based on renewable urushiol can be obtained with almost no film shrinkage. Moreover, the cross-linking density, modulus, and hydrophobicity of the films are also alterable, as validated by the differential scanning calorimetry, contact angle, and rheological measurements. More interestingly, the functionalization by mercapto groups not only stabilizes the double bonds remaining in the cured urushiol films but also endows the films with a good hydrophilicity. The high moduli of these films can be retained after repeated distortion under high temperatures, exhibiting an excellent thermal stability, which is incomparable with those of traditional lacquer films. Moreover, the urushiol-urethane prepolymer was demonstrated to well copolymerize with styrene as a macro-cross-linker for good film formation, exploring the application generality of this approach.
研究领域:
材料科学
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化学工程
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可再生资源研究
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 23
·3392
·
IF 4.7
Yuansong Ye,Huiping Shi,Yuchi Zhang,Jianrong Xia,Bing-Chiuan Shiu,Run Fang
Urushiol is recognized as a sustainable coating material with superior properties; however, it faces significant challenges in applications such as petrochemicals and marine engineering due to surface oil contamination. This study aimed to enhance the cleanability of urushiol-based coatings through hydrophilic modification. Polyethylene glycol monooleate (PEGMO) was identified as an appropriate hydrophilic macromonomer and utilized as a modifier to develop a novel urushiol-based coating, termed P(U-PEGMO), via thermal curing. The results indicated that copolymerization occurred between urushiol and PEGMO during the curing process, forming a stable urushiol copolymer with favorable compatibility. The incorporation of PEGMO greatly improved the surface hydrophilicity of the coatings, as evidenced by a reduction in the water contact angle to below 30° when the modifier content reached 30% or higher, demonstrating a high degree of surface hydrophilicity. This enhanced property imparted the modified coating with underwater superoleophobicity and reduced oil adhesion, thereby facilitating the removal of oil. The cleaning performance was evaluated using a simple water rinsing method, after which, less than 2.5 wt% of oil residues remained on the surface of the modified coating. The high hydrophilicity is considered responsible for the coating’s easy-cleaning capability. In addition, the modified coatings exhibited improved flexibility and impact resistance, albeit with a slight decrease in hardness.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）