CELLULOSE
·
2021
·Vol. 29
·期 1
·233-243
·
IF 5.044
He Meng,Lu Tong,Jia Zhengtao,Tian Huafeng,Feng Mengna,Zhang Xinjiang,Zhang Meng,Wang Chengshuang,Zhao Yanteng,Qiu Jun
The development of novel biodegradable and ultraviolet (UV) shielding packaging materials has become a research hotspot, which could avoid “white pollution”. Chitosan is an ideal raw material for food packaging but lacks sufficient UV shielding property. In this work, we used an alkali/urea/zincate aqueous solvent to dissolve chitosan, and the resulting chitosan solution was heated with the existence of chemical crosslinker to convert Zn(OH) 4 2− into ZnO particles directly. Then, the chitosan/ZnO composite hydrogel sheets were obtained, which were converted to chitosan/ZnO composite bioplastic (CCZP) by a fixing and drying process. The structure and properties of CCZP were investigated with X-ray diffraction (XRD), scanning electron microscopy, XPS, water uptake and tensile testing etc. The results indicated that the in-situ synthesized ZnO particles had distributed evenly in the chitosan matrix. The optical transmittance of the obtained CCZP reached 0.01% at 300 nm and 51.6% at 800 nm, respectively, showing excellent UV shielding performance and relatively good visible light transmittance. Meanwhile, the mechanical properties of the chitosan bioplastic were improved by the incorporation of ZnO, and the tensile strength of CCZP reached up to 49.8 MPa, showing potential application as food packaging materials. Graphic abstract
研究领域:
材料科学
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食品科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 19
·52114
·
IF 3.057
Jianfei Yang,Ruoyun Wang,Xinwen Zhang,Fei Long,Tong Zhou,Lei Liu
Various strategies have been developed to fabricate superhydrophobic surfaces with the guidance of adding rough micro-nano structure and decreasing surface energy. However, it is still a challenge to prepare a superhydrophobic coating with multifunction, eco-friendliness, and broad applicability to substrates. The mussel-inspired polydopamine (PDA) possessing superior material-independent adhesion was considered as the promising candidate material. Herein, a hierarchical superhydrophobic PDA coating was fabricated on Cu substrate via a facile self-assembly method. Thanks to PDA's self-roughening and self-adhesive effects, the coating obtains sufficient surface roughness and good interface adhesion. The superhydrophobic coating exhibits excellent self-cleaning performance and enhanced corrosion resistance based on the surface wettability. Moreover, it possesses the additional functions of UV resistance and self-healing, inheriting from the PDA coating. PDA and the surface modifier are nontoxic, biodegradable, and eco-friendly. Our findings indicate that PDA can be used as an independent structural coating with multiple functions of corrosion protection, UV resistance, and superhydrophobic properties.
研究领域:
材料科学
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表面工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 6
·4212-4224
·
IF 3.553
Sheng Xinxin,Li Sihao,Huang Haowei,Zhao Yanfeng,Chen Ying,Zhang Li,Xie Delong
Abstract In this work, Ti 3 C 2 MXene, a novel two-dimensional nanosheet, was introduced to waterborne polyurethane (WPU) coatings to prepare a composite coating. First, MAX phase materials were in situ etched by HF acid and further intercalated by water molecules to obtain exfoliated single-layer MXene nanosheet. And then, composite coatings were prepared via solution-blending low addition (0–0.4 wt%) of MXene, self-prepared waterborne polyacrylate emulsion (PAE) and isocyanate hardener, applying on Q235 mild steel. Results of AFM, XRD SEM and SEM–EDS confirm that single-layer MXene nanosheets with large lateral-to-thickness ratio are successfully prepared and achieved homogenous distribution within WPU matrix. With 0.4 wt% MXene incorporated, the WPU/Ti 3 C 2 MXene composite coatings reach a lowest corrosion current of 2.143 × 10 –6 A/cm 2 , a decrease of one order of magnitude compared with blank WPU (1.599 × 10 –5 A/cm 2 ) and own an excellent UV-blocking property (almost block the whole UV light). Graphical abstract
研究领域:
材料科学
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表面工程
·
腐蚀防护
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xuanxuan Huang,Rui Huang,Qian Zhang,Zhaohong Zhang,Jinlong Fan,Jintian Huang
With the gradual increase in environmental awareness and the growing demand for food safety, sustainable and environmentally friendly cellulose-based materials have become a promising alternative to petroleum-based plastics. However, in practice, packaging materials prepared from cellulose-based materials still have some unsatisfactory properties, such as monofunctionality, low transparency, and lack of UV shielding, antibacterial or antioxidant properties. Herein, a novel synthetic strategy is proposed in this paper, specifically, tannic acid (TA), a green natural extract with antibacterial and antioxidant properties, is used as a plasticizer and cross-linker, and oxidized cellulose nanocellulose (TOCN) modified with folic acid (FA) grafting is blended with TA, and cellulose-based biomass thin films with ultraviolet (UV) shielding, antibacterial, and antioxidant properties have been successfully prepared by using a simple vacuum-assisted filtration. The experimental results showed that the films could completely block ultraviolet light at wavelengths of 200–400 nm while providing 81.47 % transparency in the visible spectrum, while the introduction of TA conferred excellent antibacterial and antioxidant capabilities with antioxidant activity of up to 95 %, and also resulted in films with excellent mechanical properties. Therefore, this work provides ideas for the design and manufacture of competitive biomass green packaging materials, laying the foundation for future applications in food packaging.
研究领域:
材料科学
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环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jiawei Zhang,Kaili Zhang,Chen Tian,Gaoyue Zhang,Xiao Jiang,Kui Wang,Kang Sun,Jianchun Jiang
Kraft lignin (KL), a major by-product of the pulp and paper industry, has garnered significant research attention due to its abundant availability and distinctive chemical structure, making it a promising candidate for applications such as biofuels, carbon materials, and polymer composites. Despite these advantages, its utilization in fine chemical industries, including nanomaterials, is constrained by its inherent dark color and broad molecular weight distribution. Addressing these limitations has become a central focus in ongoing research efforts aimed at enhancing the functionality and commercial viability of KL. In this study, we fractionated KL from a paper-making enterprise using pH fractionation, and obtained four kinds of lignin with different molecular weights. Following that, lignin microspheres (LMPs) were formed by self-assembly from four sizes of KL. Analyzing the KL and LMP properties, the low molecular weight lignin, such as KL-2, exhibited good antioxidant properties (84.27 %, 5 mg/mL), high brightness (ISO% = 7.6), high L ⁎ value (L ⁎ = 86.2) and low polydispersity index (PDI = 1.19). The LMP showed a narrow size distribution (1.0–1.4 μm). When the LMP content is 5 %, the 5 % LMP/PVA film maintains high transparency and exhibits excellent UV protection, achieving a UV shielding rate of up to 94.6 %. Therefore, this study offered an effective way for the comprehensive utilization of pulping waste KL.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
CELLULOSE
·
2024
·
IF 4.9
Zhou Canhao,Ma Yongqiang,Rong Hui,Yu Xinghui,Liu Siyuan,Deng Liandong,Zhang Jianhua,Li Shuangyang,Dong Anjie
A new strategy for multifunctional coatings with flame retardancy, superhydrophobicity and UV shielding ability on cotton fabrics (SFR cotton) was realized by step-by-step spraying ammonium phytate, lignin and hybrid nanoparticles of polydimethylsiloxane (PDMS) modified mesoporous silica nanoparticles (MSNs) with entrapped Fe 2 O 3 (PDMS@Fe 2 O 3 -MSNs). The surface adhesion PDMS@Fe 2 O 3 -MSNs constructed micro/nano-scale surface structure on SFR cotton fabric, which endowed superhydrophobic (WCA = 152 ± 1.3°), anti-fouling and self-cleaning properties. Benefiting from the synergistic effects of the physical barrier provided by the PDMS@Fe 2 O 3 -MSNs and the intumescent flame-retardant properties of ammonium phytate and lignin, the SFR cotton fabric demonstrated excellent self-extinguishing performance under an open fire and left a char layer with 8.4 cm. In addition, due to the excellent UV-absorption ability of lignin and Fe 2 O 3 nanoparticles, the SFR cotton fabric was able to shield the UV irradiation damages to rat skin. Furthermore, the SFR cotton fabric demonstrated remarkable durability against rigorous conditions, including ultrasonic washing, sandpaper abrasion, UV irradiation and exposure to strong acid/alkali environments. After 150 min of ultrasonic washing and 50 cycles of abrasion, the SFR cotton fabric could preserve its hydrophobicity, flame retardancy and UV shielding ability. In addition, the SFR cotton fabric delivered exceptional chemical stability and UV durability when exposed to strong acid/alkali for 24 h and UV irradiation (200 W) for 12 h, respectively. Significantly, the SFR cotton fabric could retain the original flexibility and breathability of pristine cotton fabric. Therefore, the simple and feasible strategy of multifunctional coatings has broad application prospects in advanced multifunctional textiles, military facilities and other fields.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Ying Qi,Shaojian Lin,Jianwu Lan,Yifei Zhan,Junling Guo,Jiaojiao Shang
A transparent versatile cellulose platform film was prepared from Eucalyptus pulp in this work. Based on such cellulose platform, multifunctional cellulose films with ultraviolet-shielding, photochromism, and strong mechanical strength were fabricated via nucleophilic postmodification strategy by introducing a versatile spiropyran moiety into cellulose molecules. The fabricated cellulose films exhibited super-high transmittance up to 96% and performed notable ultraviolet-shielding capacity at 200–400 nm. Moreover, the photochromic performance of cellulose films with color changes could be clearly observed by the naked eyes, and the fluorescent blue could be excited. Besides, the tensile stress of multi-functional cellulose film was about 80 MPa, which was almost 8 times stronger than that of the commercial polyethylene film at the same thickness. It is noteworthy that these superior performances promote such a cellulose platform to be a versatile precursor for fabricating various multi-functional cellulose used in the fields of out-door coating, transparent packaging, optical screen, etc .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2023
·Vol. 224
·期 24
·2300359
·
IF 2.5
Kuan Zhang,Lin Dang,Junliang Zhang
Silicone rubbers are widely employed in various fields such as electronics, electrical engineering, mobile communications, aerospace, and automotive industries. However, silicone rubbers are typically challenging to reprocess and degrade. Moreover, with the advancement of technology, higher demands are placed on its thermal conductivity and dielectric properties. In this study, diglycidyl ether terminated polydimethylsiloxane is cured by 4,4′-dithiodibutyric acid which contains dual dynamic covalent disulfide and ester bonds with triazobicyclodecene as the ester exchange catalyst to prepare silicone rubber vitrimers (SRVs) through a casting method. The SRVs demonstrate a relatively higher intrinsic thermal conductivity of 0.26 W (m⁻ 1 K⁻ 1 ) compared to ≈0.20 W (m⁻ 1 K⁻ 1 ) of conventional silicone rubber. Besides, the SRVs exhibit very low and stable dielectric constant and dielectric loss at both low and high frequencies (X-band). The lowest dielectric constant and dielectric loss tangent at 10 GHz are 2.75 and 0.0650, respectively. Besides, the dual dynamic covalent bonds enable the SRVs to have excellent reprocessability and fast degradability. Moreover, the SRVs reveal UV-shielding capability, as the transmittance of the SRVs is 0% from 200 to 400 nm of UV light.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Tonghe Xing,Annan He,Zhiming Du,Yu Zhang,Yuxin Luo,Zhiyu Huang,Mengqi Wang,Zhicheng Shi,Aixin Tong,Sijie Qiao,Xiaohong Liao,Jie Bai,Heng Pan,Zihui Liang,Wei Ke,Hao Yu,Fengxiang Chen
Silk fiber, as a luxurious textile raw material, is widely used in the textile industry due to its excellent mechanical properties and wearing comfort. However, the poor (ultraviolet, UV) light stability of silk affects its further application in high-end textiles, fashionable apparel, and smart materials. Although surface modification can endow the excellent UV resistance of silk fibers, it often reduces its comfort property. Herein, a laminated ultrathin Al2O3/TiO2 coating with a total thickness of 120 nm is fabricated on the surface of silk fiber via a modified atomic layer deposition (ALD) technique. The tenacity of ALD-coated silk can maintain 61.1% of its original value after exposure to intense UV light (640 mW/cm2) under high temperature (>200 °C) for 6 h, which is far superior to other work that has been reported. This can be attributed to the synergistic effect of the reflection of UV light by the multilayer film barrier, the strong oxidizing free radicals by the Al2O3 layer in the innermost layer, and thermal shield of laminated ultrathin Al2O3/TiO2 film. ALD-coated silk fabrics can also demonstrate a multicycle laundering durability, thermal and chemical stabilities, and flame retardancy. More importantly, the wearing comfort of the modified silk has no obvious change. This method provides principle and technical guidance in high-performance and multifunctional fibers and devices.
研究领域:
材料科学
·
纺织工程
·
表面改性技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Wei-hang Chen,Dou Hu,De-xiang Sun,Lin Guo,Jing-hui Yang,Yong Wang
To address the applications of polylactic acid (PLA) in various environmental conditions, this study designed a novel additive, i.e. in-situ growing polyphosphazene nano-network on ammonium polyphosphate (APP) surface to construct the core-shell like structure through the bridging effect of chitosan. Such additive as a novel flame retardant exhibited superior flame retardant efficiency compared to the original APP, and the composite with only 15 wt% additive showed the limited oxygen index (LOI) of 31 % and V -0 flammability rating in UL-94 testing. The unique polyphosphazene nano-network structure on the surface of filler enhanced the interfacial interaction of composites and promoted the dispersion of filler in the PLA matrix, which improved the strength and modulus of composites to a certain extent, making up for the deterioration of mechanical properties induced by APP. Furthermore, the additive also endowed the composite with excellent ultraviolet (UV) shielding capability, and mechanical properties of the composite could be maintained at high level after long time UV irradiation. This work not only offers novel perspectives on the development of advanced multifunctional flame retardants, but also enhances the applicability of PLA across diverse industries.
研究领域:
材料科学
·
高分子化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Chongxiao Ge,Rui Hu,Jingyan Zhu,Jiajing Huang,Cancan Zhang,Yaqiong Zhang,Yuxian Xing,Bin Zhang,Feng Jiang
Developing sustainable elastomers derived from natural resources is crucial to mitigate environmental pollution yet challenging on account of their limited properties. In this work, chitin, lignin, and plant oil were selected as the feedstocks to design renewable bottlebrush copolymer elastomers via homogeneous reversible addition-fragmentation chain transfer (RAFT) polymerization. In such kind of bottlebrush copolymers, chitin serves as the rigid backbone, while the plant oil-derived monomer 4-vinylbenzyl oleate (VBO) and lignin-derived monomer syringaldehyde acrylate (SA) were chosen as the soft and hard segments for the rubbery brushes, respectively. These chitin- graft -poly(4-vinylbenzyl oleate- co -syringaldehyde acrylate) (Chitin- g -P(VBO- co -SA)) bottlebrush elastomers possess tunable mechanical properties and superior UV-shielding performance. To further improve their macroscopic behavior, carbon dots (CDs) were incorporated into the Chitin- g -P(VBO- co -SA) copolymers. The resulting Chitin- g -P(VBO- co -SA)/CD composites exhibit significantly enhanced tensile strength and excellent photothermal conversion ability owing to the introduction of CDs. This robust and convenient strategy can inspire the continuous development of strong and functional sustainable elastomers by combining different natural resources.
研究领域:
材料科学
·
可持续化学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 15
·3734
·
IF 3.1
Yuyang Zhou,Peng Deng,Wei Chen
There is a significant trend towards the integration of natural substances with bio-polymers for fully bio-based functional composites. Polylactic acid is regarded as a promising biodegradable polymer for replacing synthetic polymers. Differing from the case of natural fiber, the incompatibility of polylactic acid with bio-based molecules prevents it from being used to fabricate high-quality sustainable composites. This work presents a simultaneous ultraviolet shielding and antibacterial finishing process of polylactic acid combined with bioactive baicalin and an eco-friendly ester, which is highlighted for (a) the lack of synthetic chemicals involved in such process, (b) adsorption enhancement achieved at a mild temperature, and (c) marginal color change on treated polylactic acid. A response surface methodology was adopted to analyze the impacts of various factors on the baicalin quantity in polylactic acid, and to optimize the treatment condition. The uptake ratio of baicalin in polylactic acid was drastically promoted from 8.5 mg/g to 21.1 mg/g using methyl cinnamate. The response surface methodology based on a central composite design experiment indicated that the usage of baicalin was the most significant factor followed by methyl cinnamate and temperature. After optimization, a very faint color depth of 1.2 was apparent, but UPF 50+ and 92% bacterial reduction could be achieved. In all, the success in strengthening of the functionalities of polylactic acid extends the applications of polylactic acid products.
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
危险品化学品经营许可证（带存储）