INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Feiyang Zhang,Huifang Zhao,Lizheng Sha,Jing Li,Daliang Guo,Tianzhong Yuan
Plastic and fluorine-containing oil and water resistant packaging materials have been gradually replaced by non-toxic and harmless bio-based materials because of their hazard to environment and human health. In this study, chitosan/carnauba wax emulsions (CS/CWs) were firstly prepared by one-step and used as oil and water resistant coating for cellulose-based food packaging paper. The impacts of emulsion components on stability of the emulsions and barrier performance of the coated paper were investigated. The results showed that the viscosity, particle size and polydispersity index of the emulsions were greatly dependent on the concentration of CS and CW, and the coated paper had the best comprehensive performance in water and oil resistance when the concentration of CS was 3 % and the amount of CW was 90 % of the total solid content (CS3/CW90). The particle size of CS3/CW90 was in the range of 0.5–0.7 μm, and the Cobb60 value, water contact angle and the kit ratings of paper coated with CS3/CW90 achieved 7.5 g/m 2 , 130.9° and 12/12, respectively, and the coated paper also exhibited excellent thermal stability and high antibacterial rate of 99.1 %, demonstrating its great potential for application in multi-functional food packaging.
研究领域:
材料科学
·
食品包装
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Foods
·
2025
·Vol. 14
·期 4
·610
·
IF 5.1
Chengcheng Gao,Ni Zhang,Ying Chen,Fengwei Xie,Linghan Meng,Xiaozhi Tang
The strong hydrophilicity of chitosan-based films limits their practical applications. To enhance the hydrophobicity of these films, hierarchical carnauba wax particles were prepared using the Pickering emulsion method and subsequently coated onto the film surfaces. The wax was stabilized with various types and concentrations of TiO2. The resulting wax particles exhibited a micro-scale structure, with nano-scale TiO2and micro-scale TiO2aggregates present on the surface. No significant differences in contact angle were observed among these particles. Hydrophilic TiO2demonstrated smaller sliding angles and particle sizes. To improve the mechanical durability and compatibility of the wax particles with the chitosan matrix, the wax particles were mixed with a diluted chitosan solution before coating. As the concentration of wax particles increased and the concentration of chitosan solution decreased, more wax particles became exposed on the surface. This exposure increased the roughness of the coatings, resulting in a significant increase in contact angle and a decrease in sliding angle. A high concentration of chitosan provided greater protection to wax particles during mechanical durability tests. Additionally, the residue rate of liquid foods on the coating films significantly decreased. This study demonstrates that the Pickering emulsion method is an effective approach for preparing hierarchical wax particles, and that mixing these particles with a polymer similar to the matrix can effectively improve mechanical durability.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2024
·
IF 2.8
Yang Zou,Yanfen Zhang,Hui Zhang,Bin Cao,Zixin Luo,Huawei Duan
Studies have shown that fluoridated reagents for oil and water resistance are harmful to the human bodies and the environment. Consequently, the developments of nontoxic, environmentally friendly, fluorine-free and degradable materials have received increasing attentions. Here, we introduce a novel method for fabricating a hydrophobic and oleophobic paper-based packaging material through the application of chitosan/carnauba wax emulsions. These emulsions were prepared via high-shear homogenization, blending melted carnauba wax with chitosan in acetic acid aqueous solutions. The stable chitosan/carnauba wax emulsion with particle size of 430 nm was prepared at the chitosan concentration of 1.5 wt%, the carnauba wax concentration of 8 wt% and temperature of 85 °C. After 10 g/m 2 of chitosan/carnauba wax emulsion was applied to the paper surface, the oil and water resistance of the paper was significantly improved. The experimental results of kit rating value, oil contact angle, Cobb 60 value and water contact angle were 9.5 ± 0.6, 86.6 ± 2.1°, 8.90 ± 1.62 g/m 2 and 123.5 ± 2.6°, respectively. The application of chitosan/carnauba wax emulsion coating on papers provided a significantly lower water vapour transmission rate (WVTR, 78.45 ± 18.92 g/m 2 ·24 h) and oxygen transmission rate (OTR, 94.26 ± 20.21 g/m 2 ·24 h) as compared to the original paper, which met the needs of strawberry packaging.
研究领域:
材料科学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2016
·
IF 4.219
Hui Li,Jin Yang,Pan Li,Tianqing Lan,Lincai Peng
We proposed a green and facile method to fabricate superhydrophobic paper in this study, which is layer-by-layer (LBL) deposition of TiO 2 nanoparticles/sodium alginate (ALG) multilayers on paper surface followed by an adsorption treatment of colloidal carnauba wax. The formation of TiO 2 /ALG multilayers on paper surface was characterized by X-ray photoelectron spectroscopy (XPS), zeta potential measurement, scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively. The wetting property of modified paper was investigated by water contact angle (WCA) measurement. Moreover, the modified paper tensile strength has been evaluated. The results showed that WCA of paper modified with a wax-treated (TiO 2 /ALG) 3.5 multilayer reached up to 151.5°, and this obtained superhydrophobic paper exhibited improved tensile strength (increased by 4.1% compared to the pristine paper), excellent moisture-proofing property and high strength stability under high relative humidity condition, which might has a great potential for use in the liquid paper packaging and moisture-proof paper packaging.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Ni Zhang,Chengcheng Gao,Linghan Meng,Xiaozhi Tang
To improve the hydrophobicity of polysaccharide-based films, hydrophobic carnauba wax-based particles were prepared by Pickering emulsion . The influence of the different size of the particles on the structure and hydrophobicity of the chitosan coating films were investigated. The results showed that micro-scale particles (average particle size 25.04 μm) with nano-scale (5–10 nm) TiO 2 uniformly distributed on the surface of the particles were formed by Pickering emulsion. The chitosan coating films showed higher contact angle and lower sliding angle compared to the control due to the hierarchical structure, hydrophobicity and arrangement of the particles. In addition, the small particle (23–48 μm) coating film showed higher hydrophobicity than the large particle coating film (48–70 μm) due to the small particle size and the formation of more small gaps. The gaps were conducive to form “air cushion” which reduced the contact area between water and the coating films and thus increased contact angle and decreased sliding angle. The coating films showed high chemical stability and low residual rates of liquid food . The results suggest that Pickering emulsion is an effective method to create wax-based particles with hierarchical structure and the particles have potential to be used as hydrophobic coating materials .
研究领域:
材料科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Dagui Wang,Pengcheng Gao,Mengmeng Zheng,Zhijuan Duan,Dehui Wang,Defang Ding,Fan Xia
The biofouling adhering to underwater facilities has a negative impact on the environment, energy, and economic development. However, conventional anti-adhesion organic silicon and organic fluorine materials often have poor adhesion properties and mechanical stability when combined with substrates. This work presents a novel strategy for preparing composite antifouling coatings that low surface energy plant-based carnauba wax (CW) covering through rough substrates and chemically bond with flexible polydimethylsiloxane (PDMS) oligomers or polymers. The CW coating adheres strongly to the substrate owing to the mobility of the liquated CW, which flows into the micro-nano structure of the substrate and solidifies on the solid surface. The polymerization reaction of (PDMS) oligomers compounded the coating, thereby creating a composite coating with superior lubricating and antifouling properties. This distinctive bonding process imbued the coating with exceptional characteristics, including remarkable mechanical stability in destructive tests as well as an impressive ability to repel fouling, such as protein attachment, bacterial adhesion, diatom deposition, and biofilm formation. This work systematically investigated the impact of the composition and structure of composite materials on their mechanical stability and resistance to fouling, and developed high-performance antifouling coatings in the real world.
研究领域:
材料科学
·
海洋生物学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2015
·
IF 2.489
Wenjun Zhu,Jing Ren,Zichen Wang,Daxin Han,Hui Yang,Xingzhong Guo
Hierarchical porous microspheres have been prepared by emulsion-solvent evaporation with natural carnauba wax as raw material in the presence of surfactant . Appropriate reaction conditions allow the formation of “brain-like” porous microspheres with honeycomb-like inner porous structure . The as-prepared porous microspheres will be used in the potential applications, and could also be used as a promising template for synthesizing other function materials with desired porous structure.
研究领域:
材料科学
·
纳米医学
·
药物递送
·
生物材料
·
组织工程
✓ 已验证
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 12
·3000
·
IF 3.1
Jieying Su,Haitao Zhang,Meiting Zhu,Jiajie Cai,Bin Xu
As a renewable, environmentally friendly, natural, and organic material, wood has been receiving extensive attention from various industries. However, the hydrophilicity of wood significantly impacts the stability and durability of its products, which can be effectively addressed by constructing superhydrophobic coatings on the surface of wood. In this study, tung oil, carnauba wax, and silica nanoparticles were used to construct superhydrophobic coatings on hydrophilic wood surfaces by a facile two-step dip-coating method. The surface wettability and morphology of the coatings were analyzed by a contact angle meter and scanning electron microscope, respectively. The results suggest that the coating has a micron–nanosized two-tiered structure, and the contact angle of the coating is higher than 150° and the roll-off angle is lower than 10°. Sandpaper abrasion tests and UV diffuse reflectance spectra indicate that the coatings have excellent abrasion resistance and good transparency. In addition, the coated wood shows excellent self-cleaning and water resistance, which have great potential for applications in industry and furniture manufacturing.
研究领域:
材料科学
·
木材加工
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENTIA HORTICULTURAE
·
2018
·
IF 1.76
Huiyun Chen,Zhengxuan Sun,Huqing Yang
Indian jujube is perishable and has a relatively short shelf-life at room temperature. The effects of carnauba wax (CW) and CW containing glycerol monolaurate (CW-GML) coating on physico-chemical and qualitative attributes of jujube fruit are investigated during storage at 20 °C for 12 days. Compared to the control, both CW and CW-GML coatings reduce jujube weight loss, respiration rate, and ethylene production, maintain lower activities of polygalacturonase, pectin methylesterase and cellulase and delay the flesh softening. The two coatings also delay the change of skin color and ensure higher content of chlorophyll and ascorbic acid. However, the CW-GML coating most significantly inhibite the decay of jujube fruit and retains better sensory quality. After 12 d of storage at 20 °C, the decay index is only 44.3% of the control fruit, and 65.6% of the CW-coated jujube. These results confirm that CW-GML coating could be an effective means to contribute to the shelf-life extension and quality maintenance of jujube fruit stored at 20 °C.
研究领域:
食品科学
·
植物生理学
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Shaoqian Qin,Zhiwei Guo,Zumin Wu,Huabin Yin,Haofan Hu,Chengqing Yuan
The wear and vibration challenges of water-lubricated polymer components in mechanical systems remain critical. In this study, a polyurethane composite reinforced with modified nano-SiO2 and carnauba wax via casting (PUCW-SiO2) was developed, and its properties were explored. With merely 0.5% additive content of modified SiO2, the optimized composite of PUCW-0.5%SiO2 exhibited a low water swelling rate (0.157% after 7 days), enhanced mechanical properties (compressive elastic modulus is 410.39 MPa and compressive strength is 89.12 MPa), reduced wear loss (0.01 g in water), effective vibration damping (vibration acceleration signal is reduced to −4–4 m/s2 in a stable wear stage in a pure water environment), and sand-water environmental tolerance (average friction coefficient is 0.351, average wear loss is 0.0253 g). The improvements stem from modified SiO2 reinforcing the polyurethane matrix and synergizing with carnauba wax, facilitating the formation of a hydrophobic surface and continuous lubricating film that collectively mitigate wear and vibration.
研究领域:
材料科学
·
聚合物复合材料
·
表面工程
·
机械工程
·
水下技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD PROTECTION
·
2018
·Vol. 81
·期 10
·1643-1650
·
IF 1.51
Huqing Yang,Xia Li,Guoquan Lu
Because of high water loss and rot observed in postharvest sweet potato ( Ipomoea batatas (L.) Lam.) roots, a carnauba wax (CW)–based nanoemulsion without or with glycerol monolaurate (CW-GML) was developed by a high-energy emulsification approach. The effects of the two coatings on decay, respiration rate, weight loss, surface color, total soluble sugar, and starch content as well as the sensory quality of sweet potato roots were investigated during storage at 20°C for 50 days. Compared with the control treatment (water) and CW coating alone, CW-GML coating exhibited higher emulsion stability and antifungal activity, and treatment resulted in a uniform and continuous coating on roots. The CW-GML and CW coatings both effectively reduced root weight loss and respiration rate and inhibited decay incidence compared with control roots during storage. The CW-GML coating showed markedly stronger inhibition of root rot than the CW coating. Both the CW-GML and CW coatings promoted an increase in root sweetness but did not negatively impact perceived flavor. The overall results demonstrate that the CW-GML coating holds great promise as an effective postharvest technology to preserve food quality and extend shelf life of sweet potato roots.
研究领域:
食品科学
·
采后生物学
·
农产品贮藏
·
食品保鲜技术
·
应用植物学
✓ 已验证
DOI
高影响因子
Materials Horizons
·
2025
·
IF 10.7
Zhiguang Guo,Yuanmeng Zhou,Jing Wang,Shulun Ai
Facing the increasingly serious problems of plastic waste pollution and food waste, edible superhydrophobic coatings have received extensive attention from researchers because of their excellent anti-adhesion performance, which can effectively prevent liquid food from adhering to the inner wall of containers. In this study, we designed a heat-resistant and edible superhydrophobic coating by leveraging the unique and robust hierarchical structure of Lycopodium spore powder (LSP) and utilizing natural low surface energy carnauba wax (CW) as the binder. The focus was to evaluate the hydrophobicity, heat resistance, and mechanical properties of the coating and to further demonstrate its application on liquid food packaging surfaces. The results confirmed that the superhydrophobic coating (LCW) prepared by the coating exhibited excellent superhydrophobic properties (WCA>150°, SA<4°) and excellent self-cleaning function. It also has excellent anti-adhesion properties to food liquids with high viscosity and complex composition, such as honey and yogurt, etc. (it only takes 5170 ms and 2930 ms to completely slip on a surface with about 10° tilt, respectively). The incorporation of Lycopodium spore power notably enhanced the thermal stability of the coating, allowing it to retain a temperature of 150 ° even after being subjected to high-temperature treatment at 120 ℃ for 2 hours. We posit that this lycopodium-coated water-repellent material offers a promising avenue for the efficient production of biodegradable superhydrophobic coatings and holds significant potential for applications in functional food packaging.
研究领域:
材料科学
·
食品包装
·
表面工程
·
可降解材料
·
纳米技术
✓ 已验证
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）