INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Xu Jin,Jing Zhang,Yanlong Zhu,Anying Zhang,Rui Wang,Meng Cui,De-Yi Wang,Xiuqin Zhang
Developing multifunctional biodegradable PLA with ignition delay, high efficient fire retardancy, and UV resistance properties is a challenging task owing to its high flammability , and mutually exclusive phenomenon between the latter two properties. In this work, we report a superior efficient synergistic action combining piperazine pyrophosphate (PAPP) and a Co based metal-organic framework (ZIF-67). Results illustrated that with merely 0.06 wt% ZIF-67, intumescent PLA containing 4.96 wt% PAPP reached UL-94 V0 rating. The PLA/4.9PAPP/0.1MOF sample possessed a limiting oxygen index (LOI) value at 33 %, exhibited a 28 % reduction in peak heat release rate (pHRR) and a 67 % increase in fire propagation index (FPI). Moreover, the presence MOF delayed the ignition time of PLA by 12 s due to the highly porous structure of MOF and its chemical heat-sink performance. Insightful reaction to fire mechanism in the condensed phase via TG-FTIR and Raman revealed that a crack free protective intumescent char layer with higher graphitization degree was formed, which effectively enhanced the barrier effect and minimize the heat and fuel transfer. In addition, the UV resistance of PLA composites is enhanced, remaining at and below 5 % transmittance in the UVA and UVB areas. This work provides a green production way of multifunctional degradable materials and broadens their application fields.
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PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 41
·e54523
·
IF 3
Guiyou Jiang,Song Wu,Wei Yan,Tian Tian,Yang Li,Youwei Liao,Yan Yang
This paper presents a viable coating design for the production of waterborne coatings using PUA, Silicone-modified-PUA, Al-SiO 2 , and PTFE as key ingredients. The coatings are prepared through an air compression spraying technique followed by a photocuring procedure. The resulting PUA/Silicone-modified-PUA/Al-SiO 2 /PTFE coating exhibits exceptional properties including high hardness, low surface tension, and a low coefficient of friction. Experimental findings reveal noteworthy characteristics of the coating. It possesses a gloss level of 4–6°, a hardness of 492.69 N/mm, an elasticity modulus of 11469.94 MPa, a surface roughness of 0.87 μm, a dynamic coefficient of friction of 0.125 μN, and a surface tension of 0.4967 mN/m. To assess its performance, the coating underwent rigorous tests such as the CS-5 Wool Touchpad Shinning Friction test with a 200 g load over 250,000 cycles. It exhibited minimal changes in gloss (≤2°) and color difference (∆E ≤ 0.75). Additionally, the CS-10 abrasive head Optical Surface Taber Abrasion Resistance test was conducted using a 500 g load for 10 cycles, resulting in a Class 1 rating, and after 100 cycles, it achieved a Class 3 rating. This demonstrates its remarkable resistance to tribological environments, enduring tapping, touching, and scraping by fingers over extended periods.
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高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Zhiyuan Chen,Peipei Han,Wenhui Chen,Zhi Wan,Jizhou Yang,Zhigang Liu,Peng Hu,Feng Teng,Haibo Fan
In recent years, Ga2O3 flexible solar-blind ultraviolet photodetectors (UVPDs) are gradually becoming the focus of research and the industry because of their excellent wearability, low manufacturing cost, portability, large area compatibility, and high scalability. However, the crystallization temperature required for high-quality α-phase Ga2O3 films exceeds the heat resistance of most flexible materials, so the growth of Ga2O3 films on flexible substrates is a very big challenge. In this study, a highly ordered α-Ga2O3 nanorod array and flexible solar-blind UV PDs with excellent performance were successfully prepared on a flexible titanium (Ti) substrate at 500 °C by a simple water bath heating method. When irradiated by 254 nm ultraviolet light, the α-phase Ga2O3 flexible photodetector exhibits an excellent self-power optical response at 0 V bias and exhibits excellent photoelectric performance with a responsivity of 15.3 mA/W, a fast rise and fall time of 0.104 and 0.077 s, a photocurrent density of 45.7 μA/cm2, and a high detectivity of 13.8 × 109 Jones. Bending and repeating experiments demonstrated that the detector had high stability. This study provides a simpler and less expensive method for the preparation of flexible self-powered α-Ga2O3 solar-blind UV photodetectors.
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高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 15
·2300303
·
IF 9
Dangli Gao,Zhigang Wang,Qing Pang,Qingqing Kuang,Feng Gao,Xiangyu Zhang,Sining Yun,Xiaojun Wang
UV-charged optical stimulated single-band phosphors are being used for single-level optical data storage because of their ability to easily write/read information by light. In contrast, UV–visible–NIR rechargeable optical stimulated double-band phosphor is urgently necessary for multiplexed high-throughput optical data storage. Here, the authors design and synthesize Mn 2+ ,Cr 3+ co-doped zinc gallate storage persistent phosphor that exhibits strong red-green bicolor persistent luminescence (PersL). Besides the traditional ultraviolet charging, the phosphor can be effectively and repeatedly charged by using visible and NIR light by one- or two-photon process. Interestingly, red and green PersL exhibit the opposite temperature dependence, which is extremely important for multilevel information storage. The mechanism of temperature-dependent PersL intensity based on different trap types and filling approaches for the double luminescence centers is proposed. The phosphor promises a sophisticated application in optical data storage of wavelength multiplexing.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Kang Hoon Lee,June Young Kim,Imtiaz Afzal Khan,Jae Won Lee,Jong-Oh Kim
This study aimed to optimize the ultraviolet (UV)/hydrogen peroxide (H 2 O 2 ) process for degrading chemicals of emerging concern (CECs), such as caffeine (CAF), atenolol (ATL), acetaminophen (ACT), and chlortetracycline (CTC). The CECs used in this study were chosen because they are used in various industries, affect water bodies, and are difficult to degrade using conventional oxidation and biological processes. The individual degradation results revealed that the CAF degradation rate increased from 23 ± 2%–80 ± 4% as the UV/H 2 O 2 dose increased from 1 to 10 mg·L −1 . Similarly, the ATL, ACT, and CTC degradation rates increased from 59.23 ± 2%, 34.21 ± 1.9%, and, 41.36 ± 2.3%–91.24 ± 3%, 68.12 ± 3%, and 91.93 ± 3.1%, respectively. The complex feed water analysis results revealed that CTC had a higher degradation rate than the other targeted contaminants owing to its higher degradation potential. The rate of reaction results revealed that the degradation of these CECs followed the pseudo-first-order reaction, with R 2 > 0.95 in all cases. liquid chromatography with tandem mass spectrometry (LC–MS/MS) was used to identify the degradation products , and the results revealed the presence of low-molecular-weight organic products due to oxidation. The organic products were formed because of the hydroxylation and demethylation of intermediates and photoproducts, which caused a ring opening and generated several low-molecular-weight carboxylic acids before complete mineralization. These results illustrate that the UV/H 2 O 2 process had some significant effects on the complex mixture. However, CTC exhibited a relatively high degradation rate, which is believed to have inhibited the degradation of other chemicals.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Shuai Zhang,Kuanjun Fang,Xiuming Liu,Dongdong Liu,Xiran Qiao,Jinkun Wang,Fuyun Sun
The variety of colors in clothing is not satisfying the demand for textile performance. It is still a challenge to efficiently construct multifunctional colored cotton fabrics with durability. Here we report a convenient process to prepare multifunctional colored cotton fabrics with hydrophobic and UV resistant properties via self-curing raspberry-shaped colored nanospheres and PMHS. The synthesized silica/disperse dye nanospheres (SiO 2 @DPBA) effectively avoid the leakage of disperse dyes. SiO 2 @DPBA nanospheres with well monodispersity have excellent color performance that can be directly sprayed on cotton fabrics to obtain a good color depth. In order to further improve the color fastness and durability of cotton fabric, a transparent hydrophobic coating was constructed on the surface of the cotton fabric using PMHS. Ultimately, the colored cotton fabric achieved 140.2° hydrophobic angle and UPF value (200 + ), and exhibited good mechanical and chemical stability under various environmental conditions. Thus, the synergistic interaction of colored nanoparticles and PMHS provides an easy and feasible approach for the fabrication of multifunctional dyed textiles.
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高影响因子
Journal of Materials Chemistry B
·
2023
·
IF 7
Jianan Li,Wenjie Huang,Huixia He,Shuangni Shi,Xiuxia Sun,Jianxi Xiao
Prolonged exposure to UV radiation can cause severe photodamage to the skin, leading to abnormal fragmentation of elastin fibers. As one of the main protein components of the dermal extracellular matrix, elastin plays a critical role in the mechanical behavior and physiological function of the skin. Animal-derived elastin has attracted extensive attention in tissue engineering, however it suffers from severe drawbacks such as a risk of virus transmission, ready degradation, and challenging quality control. Herein, we have for the first time developed a novel recombinant fusion elastin (RFE) and its cross-linked hydrogel for improved healing efficacy for UV-irradiated skin. RFE showed temperature-sensitive aggregation behavior similar to natural elastin. Compared with recombinant elastin without the fusion V-foldon domain, RFE showed a much more ordered secondary structure and lower transition temperature. Furthermore, Native-PAGE results indicated that the addition of the V-foldon domain triggered the formation of remarkable oligomers in RFE, which may result in a more ordered conformation. Tetrakis Hydroxymethyl Phosphonium Chloride (THPC) cross-linking of RFE led to the production of a fibrous hydrogel with uniform three-dimensional porous nanostructures and excellent mechanical strength. The RFE hydrogel showed superior cellular activity, significantly promoting the survival and proliferation of human foreskin fibroblast-1 (HFF-1). Studies of mice models of UV-irradiated skin demonstrated that the RFE hydrogel pronouncedly accelerated their healing process by inhibiting epidermal hyperplasia as well as boosting the regeneration of collagen and elastin fibers. The highly biocompatible and bioactive recombinant fusion elastin and its cross-linked hydrogel provide a potent treatment for photodamaged skin, which may have promising applications in dermatology and tissue engineering.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 6
·1-12
·
IF 2.8
Wang Chenlin,Zhang Zhihao,Ma Zhongying,Zhou Zhenzhu,Wang Yuhua
In present, during preparing flame retardant polyvinyl alcohol (PVA) composites, most flame retardants present inferior fire retardant efficiency and trend to decrease the mechanical performance of PVA owing to bad dispersibility. Besides, they possess possible threat to human and environmental safety. In order to solve these issues, a bio-based flame retardant (PAE) is synthesized by using phytic acid and ethylenediamine to improve PVA flame retardancy, UV shielding properties and mechanical properties. According to thermographic examination, PVA composites retained its well-performed capacity of char production and thermal stability with the addition of PAE. The limiting oxygen index grows from 18.4% of pure PVA to 29.7% of PVA/PAE-15 composite and vertical burning rating reaches UL-94 V-0. The peak heat release rate and total heat release of PVA/PAE-15 sharply decreased by 68.1% and 31.0% comparing with pristine PVA. More importantly, PVA/PAE composites have outstanding mechanical properties and UV shielding, the addition of 5 wt.% PAE increases the tensile strength from 67.6 MPa to 85.1 MPa compared with pure PVA. Therefore, the results imply that the inclusion of PAE can elevate the flame retardant capability, mechanical properties and UV shielding of PVA.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Hongnan Zhu,Yan Cheng,Shuaijie Li,Min Xu,Xuemeng Yang,Tianci Li,Yonggang Du,Yanfang Liu,Hongzan Song
Fabricating sustainable ionic skin with multi-functional outstanding performances using biocompatible natural polymer-based ionogel is highly desired but remains a great challenge up to now. Herein, a green and recyclable ionogel has been fabricated by in-situ cross-linking of gelatin with a green bio-based multifunctional cross-linker of Triglycidyl Naringenin in ionic liquid . Benefiting from the unique multifunctional chemical crosslinking networks along with multiple reversible non-covalent interactions, the as-prepared ionogels exhibit high stretchability (>1000 %), excellent elasticity, fast room-temperature self-healability (>98 % healing efficiency at 6 min), and good recyclability. These ionogels are also highly conductive (up to 30.7 mS/cm at 150 °C), and exhibit extensive temperature tolerance (−23 to 252 °C) and outstanding UV-shielding ability. As a result, the as-prepared ionogel can easily be applied as stretchable ionic skin for wearable sensors, which exhibits high sensitivity, fast response time (102 ms), excellent temperature tolerance, and stability over 5000 stretching-relaxing cycles. More importantly, the gelatin-based sensor can be used in signal monitor system for various human motion real-time detection. This sustainable and multifunctional ionogel provides a new idea for easy and green preparation of advanced ionic skins.
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高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 6
·3569-3588
·
IF 5.7
Sun Lijian,Li Limei,Fu Qiu,Qian Xueren
The combination of two or more seemingly different features into a unique composite is an exciting direction for the preparation of novel versatile materials. Here, we report a facile and green strategy to fabricate transparent multifunctional cellulose-based film material. With carboxymethylated cellulose hydrogel as supporting medium and carboxyl groups as reactive sites, a type of antibacterial, biodegradable and UV-blocking nanocomposite films were fabricated by in situ synthesis of copper(II)-imidazolate metal–organic framework (Cu-MOF). The results show that the nanocomposite films possessed remarkable UV-blocking capability through the whole UV region meanwhile retaining high transmittance. Due to the weak photocatalytic effect of Cu-MOF, the nanocomposite films exhibit high photostability even after continuous UV irradiation (365 nm) for 12 h while maintaining their good mechanical strength. Quite encouragingly, Cu-MOF endowed the film with desirable antibacterial ability, and the antibacterial mechanism could be explained by the release of metal ions and ligands from Cu-MOF. Moreover, the incorporation of Cu-MOF can enhance the mechanical strength of the nanocomposite films. Therefore, the nanocomposite films have great potential for UV protection and transparent antimicrobial packaging applications. Graphical abstract
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高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Suning Zhang,Tongshu Wang
In this paper, a natural composite wall material sunscreen microcapsule was prepared, which significantly improved the SPF value and photostability of the embedded sunscreen agents. Using modified porous corn starch and whey protein as wall materials, the sunscreen agents 2-[4-(diethylamino)-2-hydroxybenzoyl] benzoic acid hexyl ester and ethylhexyl methoxycinnamate were embedded by adsorption, emulsion, encapsulation and solidification. The embedding rate of the obtained sunscreen microcapsules was 32.71 % and the average size was 7.98 μm; the enzymatic hydrolyzed starch formed a porous structure, its X-ray diffraction pattern did not change significantly, and the specific volume and oil absorption rate increased by 39.89 % and 68.32 %, respectively, compared with those before enzymatic hydrolyzed; The porous surface of the starch after embedding the sunscreen was covered and sealed with whey protein. 120 h sunscreen penetration rate was lower than 12.48 %; Compared with the lotion containing the same amount of sunscreen but not encapsulated, the SPF value of the lotion containing sunscreen microcapsules increased by 62.24 %, and the photostability of sunscreen microcapsules increased by 66.28 % within 8 h under the irradiation intensity of 25 w/m 2 . The wall material and the preparation method are natural and environmentally friendly, and have a good application prospect in low-leakage drug delivery system.
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高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Qi Wang,Nan Huang,Wenlong Wang,Yunpeng Wu,Song Xue,Hongwei Xu,Zhuo Chen,Yinhu Wu,Qianyuan Wu,Hongying Hu
Urea in the ultrapure water production process threatens semiconductor manufacturing . This work proposed a urea removal strategy involving the VUV/UV/chlorine process in an acidic solution to achieve high-efficiency urea removal. VUV/UV/chlorine could thoroughly remove urea of 2 mg/L within 9 min at pH 3. A TN removal rate of 70% and a dissolved organic carbon removal rate of 84% were achieved in the urea degradation process . The decrease in pH and the increase in oxidant dosage could improve urea removal efficiency. The presence of chloride anion could improve urea removal by 55–85%. Based on the radical probe and quenching experiments, free radicals accounted for more than 90% of urea removal. •Cl 2 − and •OH were calculated to contribute approximately 36% and 22%, respectively, to urea removal. •Cl and •ClO together contributed less than 32%. The chlorination of urea was responsible for less than 10% of urea removal. Nitrogen in urea was transformed efficiently into inorganic nitrogen (N 2 , ammonium, and nitrate with a rough ratio of 6:1:1.1). Organic chlorine products formed in the urea degradation process took up less than 3% in all chlorine element and was converted into chloride anion finally.
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高影响因子
危险品化学品经营许可证（带存储）