Journal of Cleaner Production
·
2024
·
IF 9.7
Chengling Huang,Youjie Gao,Yi Chen,Yunfei Shen,Hou-Yong Yu
Earth has become depleted of oil and has suffered from the misuse of non-biodegradable plastics. Significant efforts have been dedicated to addressing the application flaws of cellulose as a substitute for plastics derived from petroleum. One of key defects was non-hydrophobic nature which highly influenced the mechanical properties of cellulose material during practical uses. Here, an innovative method was proposed to achieve hydrophobic modification of cellulose films through the molecular dissociation of dodecyltrimethoxysilane (DTMS) without the use of any toxic agents during the cellulose regeneration process. The hydrophobic (water contact angle of 118°), transparent (transmittance of 85%), and high-strength (70 MPa) DC films (cellulose films modified by DTMS) were successfully fabricated via cellulose regeneration process tailored by DTMS after molecular dissociation. The DC films stood out in both hydrophobicity and strength compared with several commercial plastics and the possible hydrophobic mechanism was proposed. Furthermore, the obsession with smart sensing abilities in DC films has made it a potential tool for monitoring baby diapers. Therefore, unlike conventional concepts, the methodology we adopted is simple and efficient, and it also eliminates the need for cellulose and replaces it with plastics.
研究领域:
材料科学
·
化学工程
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高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 10
·866
·
IF 4.4
Guiming Liu,Zhao Huang,Jiujie Xu,Bowen Zhang,Tiesong Lin,Peng He
In the evolving landscape of portable electronics, there is a critical demand for components that meld stretchability with optical transparency, especially in supercapacitors. Traditional materials fall short in harmonizing conductivity, stretchability, transparency, and capacity. Although poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) stands out as an exemplary candidate, further performance enhancements are necessary to meet the demands of practical applications. This study presents an innovative and effective method for enhancing electrochemical properties by homogeneously incorporating Ru(III) into PEDOT:PSS. These Ru(III) PEDOT:PSS complexes are readily synthesized by dipping PEDOT:PSS films in RuCl3solution for no longer than one minute, leveraging the high specific capacitance of Ru(III) while minimizing interference with transmittance. The supercapacitor made with this Ru(III) PEDOT:PSS complex demonstrated an areal capacitance of 1.62 mF cm−2at a transmittance of 73.5%, which was 155% higher than that of the supercapacitor made with PEDOT:PSS under comparable transparency. Notably, the supercapacitor retained 87.8% of its initial capacitance even under 20% tensile strain across 20,000 cycles. This work presents a blueprint for developing stretchable and transparent supercapacitors, marking a significant stride toward next-generation wearable electronics.
研究领域:
材料科学
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电子工程
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DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 29
·期 6
·1788-1794
·
IF 2.137
Si Chen,Bo Zhou,Meng Ma,Yanqin Shi,Xu Wang
Permanently antistatic and high transparent PMMA terpolymer, P(MMA-co-HPA-co-SPMA), were reported in this paper, providing a new method to significantly improve the antistatic properties of PMMA without sacrificing transparency. 2-Hydroxypropyl acrylate (HPA) was chosen as a kind of compatilizer because of the good compatibility with both methyl methacrylate (MMA) and sulfopropyl methacrylate potassium salt (SPMA), a potential antistatic agent with a strong hydrophilic group. The mechanical and optical properties of P(MMA-co-HPA-co-SPMA) terpolymer barely show any visibly differences compared to PMMA homopolymer, confirmed through Fourier transform infrared, dynamic mechanical analysis, and a haze meter. Furthermore, antistatic property analysis indicates that only a small amount of SPMA can significantly improve the antistatic properties of the obtained PMMA terpolymers. The surface resistivity of the P(MMA-co-HPA-co-SPMA) sheets could be reduced to 10 9 Ω sq −1 order of magnitude, while the SPMA content reached 0.72 wt%. The hydrophilic groups, the hydroxyl and acrylate sulfonate, on the surface contributed to attract the water molecules, which rendered it a reasonably good antistatic property. These selected terpolymers will provide more opportunities to develop high-performance and antistatic products made from PMMA materials.
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
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2024
·
IF 5.8
Linxuan Han,Fenghao Hao,Yajun Chen,Xiao Wu,Lijun Qian
In this study, a novel phosphorus-containing flame retardant, SMAE, was prepared through a nucleophilic addition of N,N'-bis(salicylidene)ethylenediamine (SAED) and phenyl hypophosphite. SMAE can dissolve well in epoxy resin and provides molecular-level flame retardancy. By using SMAE as a co-curing agent and DDM to cure epoxy resin, EP/SMAE composites with excellent flame retardancy and good mechanical properties were obtained. As the dosage gradually increases, the limited oxygen index (LOI) values continue to rise. At a 5 % dosage, the Limiting Oxygen Index (LOI) value can reach 39.7 % and meet the UL 94 V-0 standard. It is observed that SMAE mainly exerts a blowing-out effect in EP. In addition, the use of SMAE as a co-curing agent can improve the impact strength of EP. The impact strength of 5 % SMAE/EP can reach 14.15 kJ/m 2 , which is 25 % higher than that of pure EP.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Zicheng Yuan,Xiaoqin Zhang,Fei Liu,Xianliang Jiang,Hao Wang,Jin Zhu,Jinggang Wang
High glass transition temperature polymers are extensively used in many fields such as packaging, electronic products, and automobiles. However, most of them are expensive as synthesized in polar aprotic solvent with low solid percent. The task of effectively synthesizing high glass transition temperature polymers faces at least three important challenges: the need for a solvent-free process to reduce cost and pollution, the requirement for a thermoplastic process with a high glass transition temperature above 150 °C, and the use of monomers derived from renewable resources. Traditional polyesters can be prepared via melt polycondensation, but achieving a glass transition temperature above 130 °C while maintaining good mechanical properties remains challenging. In this work, we developed a strategy to synthesize a new high glass transition temperature polyesters by employing rigid bulky diol of 9,9-bis [6-(2-hydroxyethoxy)naphthyl]fluorene (BNEF) and bio-based 2,5-furandicarboxylic acid (FDCA) which derived from fructose or furfural, as the main monomers. The new copolyesters exhibit a glass transition temperature of up to 164.2 °C, a number-average molecular weight of 24,600 g/mol, along with tensile modulus and strength values of 3030 MPa and 134 MPa, respectively. Furthermore, the copolyesters exhibit excellent transparency properties of 88.4 % by cutoff at 700 nm and well solvent resistance, which could serve as new low-cost, high-performance engineering plastics with ultra-high glass transition temperature and transparency.
研究领域:
材料科学
·
聚合物化学
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DOI
高影响因子
POLYMER
·
2019
·
IF 3.771
Bo Wu,Zhimeng Liu,Yuan Lei,Yi Wang,Qinfeng Liu,Anqian Yuan,Yuanyang Zhao,Xi Zhang,Jingxin Lei
Achieving good transparency, high strength and superior extensibility simultaneously in autonomic self-healing elastomers remains challenging and fascinating. Herein, a complementary design strategy of combining densely distributed multiple hydrogen bonds (H bonds) and loosely packed spacer units in supramolecular elastomer was reported to address the inherent contradiction of robust strength and room temperature self-healing. The chemical structure can be tuned to achieve a good compromise between the mechanical properties and self-healing efficiency. The representative elastomers can achieve robust strength (6.81 MPa), high extensibility (2520%) and superior toughness with the dissipated energy up to 63.7 MJ/m 3 . Moreover, this elastomer is capable of recovering mechanical fractures and routine scratches with the self-healing efficiency up to 90%, which are comparable to that of room-temperature self-healable counterparts. Spacer units with steric hindrance effect can facilitate segmental motions and dynamic changes of H-bonds. Meanwhile, the randomly distributed multiple H bonds crosslinking such spacers contribute to the good mechanical performance and intriguing self-healing. In contrast to previous reports, this strategy provides an uncomplicated and cost-effective route to prepare robust elastomers that can self-heal at room temperature without any need of external assistance.
研究领域:
材料科学
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化学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2022
·
IF 9.224
Lin-Xuan Fang,Yun-Gang Feng,Li Li,Guan-Wu Yin,Hualan Wang,Zheng Xu,Li-Wen Xu
Two silicon-containing eugenol-based benzocyclobutene monomers were prepared by a simple solvent-free hydrosilylation reaction. After heat treatment, a series of materials were obtained by a free radical addition reaction, [4 + 4] cycloaddition, or [4 + 2] Diels–Alder cycloaddition. All polymers displayed high thermostability with a 5% weight loss temperature (T5d) of over 410 °C and a glass transition temperature (Tg) of up to 216 °C as well as a good transmittance of 90% varying from 500 to 800 nm. In particular, all polymers also exhibited good hydrophobicity with contact angles exceeding 100° and water absorption as low as 8‰ after immersing in boiling water for 72 h. It should be noted that P3 showed excellent dielectric properties with a dielectric constant (Dk) of 2.48 and a dielectric loss (Df) of 6.38 × 10–3 at a high frequency of 2 GHz as well as good flame retardancy due to the high content of cyclotriphophazene compared with those of P1, P2, and previously reported biobased materials. The above advantages indicate that eugenol-based low-dielectric materials have great potential for application in encapsulation resins in the field of microelectronics.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Dequan Han,Huhu Tian,Lantao Liu,Luya Cao,Hongzhang Cao,Xiaoli Yu
The prevalent use of disposable plastic tableware presents notable environmental and health risks. An alternative, polylactic acid (PLA), often does not meet usage requirements due to its low crystallization rate. This research introduces an amide-based nucleating agent, BRE-T-100, developed through a straightforward method to enhance the heat resistance and crystallization rate of PLA. This study systematically investigates the impact of BRE-T-100 and other nucleating agents on the properties of PLA composites. The incorporation of 0.8 % BRE-T-100 increases the crystallization temperature of PLA from 109.6 °C to 131.9 °C. Further, the total crystallization time of PLA composites at 120 °C is reduced to <60 s, while maintaining good transparency. BRE-T-100 exhibits superior comprehensive properties compared to talcum, TMC-200, and TMC-300 and is nearly on par with LAK-301. Its application as a nucleating agent in PLA-based disposable tableware shows promise.
研究领域:
材料科学
·
环境科学
·
化学工程
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jia Chen,Zhilin Chen,Xianbo Hou,Liming Chen
Efficient thermal insulators that can maintain their efficacy at extreme temperatures are in pressing demand, particularly in fields such as energy saving, aerospace, and sophisticated equipment. Herein, a novel and facile polymerization-regulated optimal strategy is adapted to realize the comprehensive performance of polyimide (PI) aerogel membranes with mechanical robustness, high flexibility, hydrophobicity, light transmittance, and efficient thermal insulation. Benefiting from the hydrolysis of monomers and chemical imidization reaction process verified by a thermo-chemo-mechanically coupled theoretical model, the viscosity of precursors, shrinkage rate, and microstructure of aerogels are precisely controlled, leading to a low thermal conductivity range of 0.023–0.044 W/(m·K). The fabricated PI aerogel membranes, which undergo a remarkable transformation from their initial brittle and opaque nature to a state of high flexibility and transparency, exhibit a 3.0 times increase in tensile strength (4.6 MPa) and a 8.4 times improvement in elongation at break (20.6%) over previous studies while demonstrating an exceptional light transmittance of 92.5% across a wide spectral range from 500 to 2500 nm. Additionally, the PI aerogel membranes possess superior mechanical properties and a wide temperature resistance range extending from −196 to 300 °C. These flexible PI aerogel membranes can be effectively adjusted to meet the practical application of a circular ring solar thermal collector, which displayed a high solar heat collection temperature of 135 °C at a thickness of 0.5 mm. The coordination between the thermophysical properties and mechanical properties of the PI aerogel membranes in this work holds great promise for application requirements of thermal insulators in optical elements under harsh environments.
研究领域:
材料科学
·
能源工程
·
航空航天工程
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Meiling Zhang,Jing Yu,Rongrong Chen,Qi Liu,Jingyuan Liu,Dalei Song,Peili Liu,Liangtian Gao,Jun Wang
Recently, taking advantage of slippery liquid-infused surfaces (SLIPS) has been proposed as a simple passive ice removal method. However, the process of frost formation and ice freeze on SLIPS is accompanied by the lubricant migration from the structured substrate to the surface of frozen droplets which would lead to the sacrifice of lubricant. In this paper, highly transparent and robust slippery coatings were carried out by infusing lubricant into tube-like SiO 2 composite structure. The tubular material and a stack-hole composite structure contribute a lot to lock the lubricating oil, thus reducing the loss of lubricant during the icing/deicing cycles. The ultra-low ice adhesion strength (∼17 kPa) encourages the SLIPS to be a promising candidate for anti-icing applications. Moreover, capillary action within the unique structure as well endows SLIPS with the self-healing property. As a consequence, the as-prepared samples achieve long-term anti-icing stability while ensuring a glass substrate transmittance of up to 92.01%. In addition, surfaces maintain all the slippery characteristics after being directly exposed to running water for 30 min. Such good stability offers a possibility of applying SLIPS to everyday life.
研究领域:
材料科学
·
表面工程
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DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Shuaishuai Huang,Yichen Wan,Yuxuan Sun,Kaka Zhang,Xiaoqing Ming,He Zhu,Qi Zhang,Shiping Zhu
Poly(ionic liquid)s (PILs), combining the advantages of both polymers and ionic liquids, have attracted significant attention from the academia and industry. This study has developed a fluorinated PIL copolymer-based adhesive with versatile adhesion ability and high transparency. The adhesive was prepared by in situ UV-curing a precursor solution composed of commercially available monomers, that is, 2,2,3,4,4,4-hexafluorobutyl methacrylate and 1-vinyl-3-butylimidazolium bis(trifluoromethylsulfonyl)imide. The prepared adhesive showed a superior adhesion strength of 6.61 MPa toward glass substrates. Furthermore, minimal addition of a plasticizer in the bulk adhesive could significantly enhance the adhesion performance on fluorinated polymer substrates while maintaining the polar surface bonding strength and high transparency. The resulting PIL-based adhesive showed a strong adhesion on various adherends, such as glass, steel, ceramics, and low surface energy polymers. This work provides a methodology for using PILs as adhesives and is believed to have good potential for commercialization.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
POLYMER INTERNATIONAL
·
2019
·Vol. 68
·期 6
·1186-1193
·
IF 2.433
Qi Wu,Xiaoru Ma,Feng Zheng,Xuemin Lu,Qinghua Lu
A new diamine with bulky pendant biphenyl and ortho -position dimethyl structures, 4,4′-((1,1′-biphenyl)-4-ylmethylene)bis(2,6-dimethylaniline), was synthesized via a one-pot reaction of 4-biphenyl carboxaldehyde and 2,6-dimethylaniline. The diamine was employed to polymerize with several dianhydrides via one-step condensation under high-temperature conditions. The light yellow or colorless polyimide (PI) films obtained were found to have cut-off wavelengths in the range 286–358 nm and transmittance over 80% in the visible region (400–780 nm). Meanwhile, these PIs possessed excellent solubility in common organic solvents, even in low-boiling-point solvents such as chloroform (CHCl 3 ), dichloromethane (CH 2 Cl 2 ) and tetrahydrofuran. The glass transition temperatures ( T g ) of the PIs were determined to exceed 343 °C, even to 456 °C. All PI films were flexible with a tensile strength of 78–119 MPa, a Young's modulus of 2.0–2.5 GPa and elongation at break of 4.0%–8.2%. Therefore, these colorless PIs can be used as candidate materials for flexible display substrates. © 2019 Society of Chemical Industry
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）