ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jianzhong Ma,Chongxin An,Lei Zhang
In this work, we synthesized an acid-responsive zinc metal–organic framework (ZIF-8) at room temperature by a solvent method, which can not only be used as an antibacterial by releasing zinc ions but also as a carrier for antibacterial material encapsulation. Subsequently, the broad-spectrum antibacterial triclosan (TCS) was encapsulated in ZIF-8 by the impregnation method, and a long-term antibacterial and antimildew material with slow-release effect TCS@ZIF-8 was synthesized successfully. The encapsulation rate and drug loading rate of TCS@ZIF-8 prepared by adjusting the mass ratio of ZIF-8 and TCS were 71.9 and 25.1%, respectively. Further, TCS@ZIF-8 was introduced into polyacrylate (PA) emulsion, and PA/TCS@ZIF-8 nanocomposite emulsion was prepared successfully by the physical blending method. When the pH of the coating surface became slightly acidic due to the metabolic byproducts of microbial growth, ZIF-8 in PA/TCS@ZIF-8 disintegrated to release Zn2+ and TCS, which can effectively kill bacteria and mold. When the dosage of TCS was 4.0 wt %, the antibacterial rate of the PA/TCS@ZIF-8 nanocomposite film against Escherichia coli and S. aureus was 100 and 97.3%, respectively. Finally, PA/TCS@ZIF-8 nanocomposite emulsion-coated leather was prepared by the spraying method. Compared with the control group that did not use ZIF-8-encapsulated TCS, PA/TCS@ZIF-8 nanocomposite emulsion-coated leather not only showed better antibacterial and antimildew effects but also showed long-term antibacterial and antimildew performance even after being treated under hot and humid environments of 90% humidity and 40 °C for 30 days. Overall, this study not only provides theoretical guidance into the preparation of long-term antibacterial and antimildew coatings for leather but also has great application prospects in paper, clothing, furniture, and other fields, which has great significance in protecting consumers from the invasion of bacteria and mildew.
研究领域:
材料科学
·
皮革化学
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微生物学
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2021
·Vol. 13
·期 19
·3314
·
IF 4.329
Rui Peng,Jingjing Zhang,Chungui Du,Qi Li,Ailian Hu,Chunlin Liu,Shiqin Chen,Yingying Shan,Wenxiu Yin
In the present study, the sustained-release system loading citral was synthesised by using PNIPAm nanohydrogel as a carrier and analysed its drug-release kinetics and mechanism. Four release models, namely zero-order, first-order, Higuchi, and Peppas, were employed to fit the experimental data, and the underlying action mechanism was analysed. The optimised system was applied to treat a bamboo mould, followed by assessment of the mould-proof performance. Our experimental results revealed that the release kinetics equation of the system conformed to the first order; the higher the external temperature, the better the match was. In the release process, PNIPAm demonstrated a good protection and sustained-release effect on citral. Under the pressure of 0.5 MPa, immersion time of 120 min, and the system concentration ratio of 1, the optimal drug-loading parameters were obtained using the slow-release system with the best release parameters. Compared to the other conditions, bamboos treated with pressure impregnation demonstrated a better control effect on bamboo mould, while the control effect onPenicillium citrinum,Trichoderma viride,Aspergillus niger, and mixed mould was 100% after 28 days. Moreover, the structure and colour of bamboo remained unchanged during the entire process of mould control.Keywords:nanohydrogels;citral;sustained-release;mechanism;bamboo;anti-mould
研究领域:
材料科学
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微生物学
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林业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Na Wang,Xiang Zhou,Youming Dong,Ying Zhang,Rong Liu,Haijiao Kang,Kaili Wang,Jianzhang Li
Natural mildew preventives, like citral, have great potential to protect bamboo from mildew, while their long-lasting antimildew performance is yet to be challenged owing to their oxidability and volatility. Inspired by biomimetic mineralization, in this work, citral@ZIF-67 particles were synthesized by encapsulating citral into a zeolite imidazolate framework-67 (ZIF-67) cage and introduced into a bamboo structure. Benefiting from the unique cage structure and large surface area of ZIF-67, it can encapsulate sufficient citral molecules. The encapsulation reduced the particle size of ZIF-67 due to the nucleation of citral. Furthermore, the surface area, pore size, and volume of citral@ZIF-67 particles gradually decreased with the increase in loading amounts of citral. ZIF-67 exhibited a certain antibacterial ability against E. coli and S. aureus. The encapsulation of citral can further enhance the antibacterial activity of ZIF-67. In addition, the citral@ZIF-67 showed slow-release performance that followed the Fickian diffusion mechanism. After the citral@ZIF-67 treatment, bamboo showed no mold spots on the surface with an infection grade of 0, which was retained, even though bamboo was conditioned at 50 °C and 85% relative humidity for 10 days. This proposed method can effectively improve the stability of natural mildew preventives and endow bamboo with long-term antimildew properties with low cost and minimized environmental impacts.
研究领域:
材料科学
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生物学
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林业科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Wu Bin Ying,Haixiong Liu,Peiyuan Gao,Zhengyang Kong,Han Hu,Kai Wang,Ang Shen,Zhijin Jin,Lin Zheng,Hongxia Guo,Ruoyu Zhang,Jin Zhu
Considering the complicated environment in daily use of stretchable devices, the capabilities of anti-stress relaxation, anti-fatigue, anti-fungal and self-healing are very much appreciated, and the above four functionalities largely depend on the elastic matrix. Here, these demands are fulfilled by a poly(thiourethane-urethane) elastomer CBPU-3. In detail, a large amount of cyclohexane rings, with completely reversible boat–chair conformational transition, are introduced into the backbone of poly(thiourethane-urethane), and such non-planar ring imparts molecular elasticity and modulus into the elastomer, resulting in remarkable anti-stress relaxation and anti-fatigue abilities. Even after 20 h fixation at 300% strain and 1000 times cyclic tensile (50% strain), the recovery ratio could still be higher than 98%, and its stable microstructure is proved by SAXS scattering patterns. In addition, the thioether bond ensures the effective mildew proof ability, and the mechanical properties and transmittance change little even after a severe mildew pollution for 30 days. Simultaneously, the relatively lower bond energy of C-S (62.0 Kcal/mol) in thiourethane bonds endowes the poly(thiourethane-urethane) with self-healing capability (highest: 40 μm/min at 80 °C). Finally, the durability and usability of the deformable resistive sensor array based on this elastomer as the matrix are drastically enhanced due to the above integrated functionalities.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Longchao Ma,Yihan Zhao,Tao Zhang,Tiancheng Yuan,Xinzhou Wang,Yanjun Li
The flattened bamboo board (FB) represents a promising innovation in the bamboo industry. To address the challenges of flammability and hygroscopicity, composite coatings consisting of melamine (MEL), phytic acid (PA), cerium ions (Ce 3+ ), and sodium laurate (La) are assembled on the FB surface through an in-situ impregnation strategy. The resulting MEL/PA-Ce 3+ @La FB exhibits exceptional flame retardancy. It achieves a V-0 rating in the vertical burning test (UL-94) and boasts a high limiting oxygen index (LOI) value of 38.5 %. The coated FB exhibits superhydrophobicity, evidenced by a water contact angle of 156.5°, which can be attributed to the in-situ growth of PA-Ce 3+ complexes (for constructing micro/nanoscale coarse structures) and the modification with La (for reducing surface energy).This superhydrophobic surface imparts both self-cleaning and anti-mold properties to the coated FB. Moreover, the coated FB exhibits excellent mechanical stability, withstanding 36 cycles of sandpaper abrasion and tape peeling without losing its hydrophobicity. In summary, this work provides an innovative strategy for the bamboo processing industry to produce flattened bamboo boards with combined flame retardancy, superhydrophobic and anti-mold properties. Such versatility holds significant potential to facilitate the utilization of flattened bamboo boards in the construction and decorative materials industries.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2021
·Vol. 14
·期 3
·577
·
IF 3.623
Shaokun Hao,Chuanshuang Hu,Xiuyi Lin,Jin Gu,Hong Yun,Weiwei Zhang
Complexation copper with amine provides an effective strategy for fixation copper in wood, while hydrophobic modification improves the dimensional stability of wood. Thus, a combination of complexation and hydrophobization is expected to enhance the efficiency of copper-based biocides. In this study, hydrophobic hybrid silica gel containing copper amine complexes (MACu) was prepared through an in situ sol-gel process in wood using methyltriethoxysilane (MTES), 3-amino-propyltriethoxysilane (APTES), and copper chloride. The resistance to growth of molds for MACu modified wood (Populus tomentosa) was measured according to ASTM D3273-16. A leaching resistance test was carried out in accordance with AWPA E11-16. The results showed that onlyAspergillus nigercovered the surface of untreated wood blocks and no mold grew on the MACu surface even after the leaching test. MACu xerogel and MACu wood were further characterized by SEM-EDS, FTIR, and XPS. A possible schematic diagram of the reaction mechanism was proposed to explain the high-efficiency anti-mold performance of MACu wood.
研究领域:
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2020
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IF 5.289
Wenwen Guo,Xin Wang,Jiali Huang,Wei Cai,Junling Wang,Lei Song,Yuan Hu,Zhou Gui
Currently, aluminum phosphide tablets have been extensively used as fumigant for grain storage because they could release phosphine that shows highly efficient anti-microorganism. However, phosphine is highly toxic and flammable which usually causes production accidents. Therefore, this study aimed to develop a novel fumigant based on cinnamaldehyde and study its antimicrobial efficacy for grain storage. The novel fumigant tablet was composed of cinnamaldehyde, silica, citric acid and sodium bicarbonate. Results showed that mesoporous silica with ultra-high specific surface area (1036.5 m 2 /g) served as carrier for cinnamaldehyde. The mixture of citric acid and sodium bicarbonate reacted with moisture to generate carbon dioxide which was helpful to release cinnamaldehyde. As expected, the fumigant tablet displayed a sustained release effect. The in vitro culture experiments showed that cinnamaldehyde had high antimicrobial effect against five fungi including Aspergillus flavus , Aspergillus candidus , Aspergillus niger , Fusarium and Penicillium . In the accelerated mildew simulation experiment (temperature: 35 °C, humidity: 98%), the blank group without mildew preventive began to go mouldy after five days, the control group with only cinnamaldehyde became mildew one week later, whereas there was no visible mildew growth in the experimental group with the fumigant tablet after one week. The number of fungal colonies in the blank group and the control group after one week was 8.3 × 10 4 and 6.5 × 10 3 CFU/g, respectively, while there were no fungi detected in the experimental group. This cinnamaldehyde-based fumigant tablet is a green and safe mildew preventive, which provides an alternative solution to aluminum phosphide tablet for grain storage.
研究领域:
食品科学
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微生物学
·
植物化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Siwen Pan,Dezhang Kong,Hui Chen,Qiang Gao,Jianzhang Li
Soy protein adhesives have great potential for development and have gradually become one of the research hot spots in recent years. However, the unmodified soy protein adhesives have many problems such as poor bonding performance and water resistance, high viscosity and easy to mildew, which affect their wide industrial application. In this study, soy protein adhesives were modified with borax and tannic acid to investigate the structural characteristics, physicochemical properties and mildew resistance of soy protein adhesives and to explore the strength mechanism of the modifier. Results showed that boron-oxygen reversible dynamic covalent, multiple hydrogen bonds and electrostatic interactions are formed between borax-tannic acid and soy protein isolate, and the synergistic effect of these multiple network structures improves the properties of soy protein adhesive. Therefore the dry and wet shear strength of the modified soy protein adhesive increased by 54 % and 45.8 % to 2.37 MPa and 1.115 MPa compared with unmodified soy protein adhesives. In addition, the anti-mildew performance of the liquid adhesives was extended from 2 d to more than 96 h. This research provides a simple and green method to improve the comprehensive properties of soy protein adhesive, and promotes the application of soy protein adhesive in wood industry.
研究领域:
材料科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Zhu Liu,Shoulu Yang,Zhongwei Wang,Ning Ji,Yan Qing
To ensure the long-term fire-retardant (FR) and anti-mildew (AM) of bamboo materials when employed in outdoor settings susceptible to rainfall exposure, high durability is essential. In this study, we achieved water-leaching resistance of FR and AM bamboo through the in situ synthesis of phosphotungstic acid (PW) and silver nitrate (AG) via vacuum-pressure impregnation. The successful synthesis of the nanospheres within the bamboo (referred to as PWAG-B) was confirmed by TEM, FTIR, and XPS. These nanospheres remained intact within the bamboo cell wall after being subjected to a leaching test , with only a negligible mass loss of 0.88 % and virtually no traces of Ag and W in the leachate for PWAG-B 1 . Furthermore, the treated bamboo exhibited superior AM properties, with complete resistance against two types of mildew , namely Botryodiplodia theobromae and Alternaria alternate , as well as stain fungi including Aspergillus niger and Penicillum citrinum . Notably, the treated bamboo displayed reduced thermal and smoke parameters in comparison to untreated bamboo, along with a delayed ignition time . This long-term AM and FR bamboo has the potential for the development of eco-friendly outdoor building materials .
研究领域:
材料科学
·
林学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-10
·
IF 4.011
Liu Gonggang,Lu Zhou,Zhu Xiu,Du Xiaoqing,Hu Jinbo,Chang Shanshan,Li Xianjun,Liu Yuan
Bamboo with the outstanding properties, such as good mechanical strength, fast growth rate and low growth cost, is considered as one of utilitarian structural nature materials. But bamboo is easy to get mildewed resulting in disfiguration and fungi corrosion. In this work, a facile method was developed to improve the mildew-proofing capability of bamboo. Mussel-inspired polydopamine (PDA) with biomimetic adhesion function and highly active functional groups was employed to immobilize highly-dispersed Ag and TiO 2 nanoparticles on the surface of bamboo via an in-situ growth method. Integrating the uniform PDA coating, photocatalytic function of TiO 2 nanoparticles and bactericidal role of Ag nanoparticles, the mildew-proofing capability of bamboo is enhanced significantly. The results show a non-covalent interaction is more likely to account for the binding mechanism of PDA to bamboo. And the prepared bamboo samples show good photocatalytic performance and have excellent resistance leachability. Meanwhile, the mildew-proofing property of prepared bamboo sample was greatly improved.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Kaili Wang,Tao Zhang,Xiao Xiao,Xinyu Fang,Xiaorong Liu,Youming Dong,Yanjun Li,Jianzhang Li
Bamboo is easily affected by moisture and mold, etc., causing performance deterioration, which limits the practice application. Phytic acid (PA) as abundant biomass resources , can form the polyelectrolyte complexes with cationic charged compounds, and also the coordination complexes with metal ions . In this work, the green and transparent superhydrophobic coating on bamboo surface was developed by deposition and assembly of PA-based hybrid complexes and subsequent hydrophobic treatment. The micro-/nano- hierarchical structure supported by hybrid complexes and the low energy component provided by octadecylamine both contributed to the excellent superhyophobic performance. The contact angle and sliding angle of the modified bamboo surface were 153.2° and 7.5°, respectively, and exhibited great environment and chemical durability. In addition, the superhydrophobic coating endowed bamboo with mildew resistant property. This work demonstrates the potential of PA-based hybrid complexes as constructing superhydrophobic coatings, and also provides an avenue for the fabrication of green and transparent superhydrophobic coatings on bio-based material surfaces.
研究领域:
材料科学
·
表面工程
·
可持续材料
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Haoran Li,Rongcui Fan,Fudong Zhang,Ziwei Cui,Jiongjiong Li,Yahui Cai,Lixing Kang,Xianxu Zhan,Jianzhang Li,Dan Tian
Biomass adhesives show great potential in developing environment-friendly wood-based panel industry. Among them, soybean protein isolate (SPI) adhesives have a wide source of raw materials, but exploring high-strength, water-resistant, mildew-proof soybean protein-based adhesives remains a tremendous challenge. Inspired by the spatial structure arrangement of spider silk in nature, a facile and efficient bionic approach is adopted to prepare soybean protein adhesive with excellent overall performance by introducing chitosan (CS) and MXene nanosheets in soybean protein. The addition of MXene nanosheets is expected to form the β-sheet crystalline conformation of spider silk, which contributes to the formation of a tightly cross-linked adhesive system that hinders the penetration of moisture. Compared with the 1-SPI adhesive, the prepared 5-SPI/CS/MXene adhesive shows an increase of 175% in wet shear strength (1.76 MPa), indicating excellent adhesion strength and water resistance. Besides, the addition of CS benefits to improve the dispersibility of MXene in the adhesive system. Therefore, the synergy of MXene and CS significantly improves the strength, water resistance of the adhesive and increases the storage time from 7 d to more than 50 d. This research would provide a new idea for the preparation of biomass-based adhesives.
研究领域:
材料科学
·
生物仿生学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）