ACS Applied Polymer Materials
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2026
·
IF 5.2
Longjiang Huang,Haritz Sardon,Guangmou Cao,Xiaolong Wang,Weijun Zhen,Liuchun Zheng
Traditional nonbiodegradable plastics pose significant environmental hazards, whereas biodegradable plastics are free from these drawbacks. Poly(butylene dodecanedioate) (PBD) and Poly(ethylene dodecanedioate) (PED) exhibits well-rounded properties comparable to polyethylene (PE) while being biodegradable. However, its practical application is hindered by several limitations, including limited functionality and insufficient mechanical strength. To address these issues, this study incorporated polydimethylsiloxane (PDMS) as a block to synthesize a polyester-PDMS copolymer (PBDP and PEDP), thereby enhancing its performance and functionality. The introduction of flexible PDMS segments was found to significantly improve the mechanical properties of the material, with the elongation at break increasing from 355% for PEDP0 to 534% for PEDP4, and the impact strength improving from 259 J/m to 369 J/m. Owing to its low surface energy, PDMS enriches the material surface, endowing the synthesized block copolymer with enhanced antifouling and hydrophobic properties, as evidenced by an increase in the contact angle from 75° for PEDP0 to 97°. These improvements significantly broaden the application potential of PED-based materials. Given the minimal differences in structure and postmodification between PBD and PED, this paper primarily uses PED as the representative case for analysis. Relevant data and figures for PBD are available in the Supporting Information.
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LANGMUIR
·
2026
·
IF 4.4
Zhengqiu Chen,Junyu Chen,Huaming Mao,Jungang Yin,Yu Ren,Wei Dai,Shuanglong Zhao,Hongwei Yang
Although the preparation of silver nanosheets (AgNSs) through diverse methods has largely advanced over the past few decades, the simple and efficient synthesis of high-quality AgNSs under mild conditions remains challenging. Herein, we report a strategy for preparing rounded and sharp-cornered AgNSs with uniform thicknesses of 30–40 nm via simple liquid-phase reduction. Structural characterization revealed that the reduction reaction rate was mediated by coordination of silver ions with the amino groups of gelatins and the carboxylate ions of glutaric acid (GA), effectively suppressing burst nucleation. Density functional theory calculations further identified the adsorption preference of GA anions on Ag(111) as the key factor that dictates the anisotropic growth of silver nanosheets. Furthermore, selective etching with hydrogen peroxide (H2O2) mediates the morphological evolution of AgNSs from rounded to sharp-cornered morphologies, effectively removing byproduct particles to achieve sharp-cornered AgNSs in yields exceeding 90%. Catalytic performance testing of the hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) indicates that the mass-normalized rate constants reached 156.67 and 154.22 s–1 g–1 for the rounded and sharp-cornered AgNSs, respectively. The conversion rate of 4-NP decreased by only about 2% after five consecutive catalytic cycles. This work provides guidelines for the efficient, economical, and green synthesis of two-dimensional metal nanomaterials while offering valuable insights into the application of the AgNSs in the catalytic reduction of 4-nitrophenol.
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REACTIVE & FUNCTIONAL POLYMERS
·
2026
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IF 5.4
Shibo Pei,Yanli Xiang,Peng Zhang,Xv Meng,Chenyi Wang,Qiang Ren
A kind of epoxy-functionalized flexible graft polyesters containing pendant polydimethylsiloxane short chains (ADSE) as novel tougheners for epoxies were developed. The polyesters with varying compositions were synthesized using dodecanedioic acid and azelaic acid as diacids, diethylene glycol and a Y-shaped mono-terminal bis‑carbon hydroxyl polydimethylsiloxane (PDMS) as diols, and two epoxy compounds as capping agents. Chemical structure and crystallization property of ADSE were well characterized by 1 H NMR, FTIR, GPC and DSC. Viscosity testing revealed a higher content of PDMS resulted in a lower viscosity of ADSE. Polyester containing 50% of PDMS in diols (ADSE50) showed best toughening and strengthening performance for epoxies. The epoxy thermosets containing 2% of ADSE50 exhibited the maximum impact strength of 40.42 kJ/m 2 and tensile strength of 103.25 MPa, which increase of 94.14% and 34.21% compared with that of neat epoxy. The introduction of ADSE50 also increased the glass transition temperature ( T g ), initial thermal decomposition temperature, hydrophobicity and maintain high transparency of epoxy thermosets. The polyester of ADSE 50 was demonstrated to be a versatile toughener, capable of fabricating high-performance epoxy thermosets.
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Journal of CO2 Utilization
·
2025
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IF 8.4
Kihyuk Sung,Hye Jeong Joe,Changsu Ha,Hee-Seong Yang,In-Hwan Lee,Seok Ki Kim,Hye-Young Jang
We investigated the polymerization mechanism of a highly active heterogeneous Zn-gallate catalyst used for propylene oxide (PO) homopolymerization and PO/CO 2 copolymerization. The molecular weights of poly(propylene oxide) (PPO) and poly(propylene carbonate) (PPC) can be controlled by varying the ratio of chain transfer agents (CTAs) to PO. CTAs of varying acidity and structure provided insight into their interaction with catalytic sites. Theoretical calculations on a heterogeneous zinc hydroxide slab model for Zn-gallate revealed that polymerization is initiated by the reaction of PO with a hydroxyl group located within the zinc hydroxide lattice. Further energy barrier calculations and polymerizations at varying CO 2 pressures explained the kinetic preference for PPC formation over PPO at high CO 2 pressure.
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Polymers
·
2023
·Vol. 15
·期 10
·2345
·
IF 5
Diansong Gan,Yuejun Liu,Tianhui Hu,Shuhong Fan,Xiaochao Liu,Lingna Cui,Ling Yang,Yincai Wu,Lily Chen,Zhixiang Mo
A new bio-based polyamide 56/512 (PA56/512) has been synthesized with a higher bio-based composition compared to industrialized bio-based PA56, which is considered a lower carbon emission bio-based nylon. In this paper, the one-step approach of copolymerizing PA56 units with PA512 units using melt polymerization has been investigated. The structure of the copolymer PA56/512 was characterized using Fourier-transform infrared spectroscopy (FTIR) and Proton nuclear magnetic resonance (1H NMR). Other measurement methods, including relative viscosity tests, amine end group measurement, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), were used to analyze the physical and thermal properties of the PA56/512. Furthermore, the non-isothermal crystallization behaviors of PA56/512 have been investigated with the analytical model of Mo’s method and the Kissinger method. The melting point of copolymer PA56/512 exhibited a eutectic point at 60 mol% of 512 corresponding to the typical isodimorphism behavior, and the crystallization ability of PA56/512 also displayed a similar tendency.Keywords:copolymer PA56/512;bio-based polymer;thermal properties;non-isothermal crystallization kinetics
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PubMed
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CRYSTAL GROWTH & DESIGN
·
2022
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IF 4.01
Haozhou Huang,Jun Li,An Du,Yinggang Jia,Yuehua Cong,Baoyan Zhang
A new series of bent-structure liquid crystalline dimers containing a cholesteryl group were synthesized. The molecular structure and mesophase properties of the dimers were characterized by FTIR, 1H-NMR, DSC, XRD, POM, and UV–vis. The BPmem was proposed, which is considered to be a transition state appearing during the cooling process between BP I and N* and having memory for the original lattice network of BP I. The BPmem state was analyzed in detail, and it proved to be influenced by the molecular structure, the cooling rate, and the surface anchoring. For the planar-aligned sample, the macroscopic color of BPmem is the superposition of two selective reflection wavelengths, different from those of conventional N* and BPs, which has potential application value.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 29
·e54063
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IF 3
Huan Wang,Zhengzai Cheng,Lesly Dasilva Wandji Djouonkep,Linfeng Wang,Shuanpu Cai,Mario Gauthier
A novel biphenyl monomer, diethyl 6,6′-dimethoxy-[1,1′-bipheny]-3,3′-dicarboxylate (DDBD), was synthesized from 4-hydroxybenzaldehyde, a phenolic compound derived from lignin. A series of polyesters were prepared by polycondensation of the biphenyl monomer with hydroquinone bis(2-hydroxyethyl) ether and aliphatic diacids via a two-step melt polycondensation method. It was shown that the properties of the polyesters can be tuned by varying the length and the structure of the spacer in the aliphatic diacid monomers. Structure–property relations for these materials were investigated by Fourier-transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, gel permeation chromatography (GPC), differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical analysis. GPC analysis showed that the weight-average molecular weight ( M w ) of the samples varied from 4.2–5.0 × 10 4 g/mol, while thermal analysis yielded T g values of 51–120°C, and 5% decomposition temperatures ( T d,5% ) of 327–389°C. All the samples exhibited a high yield strength (56–87 MPa). After 30 weeks of degradation in soil, the copolyesters had mass losses of up to 4.4%, and an investigation of the ecotoxicity of the copolyesters with Eisenia fetida yielded a survival rate of over 80% after 14 days for the different copolyesters, suggesting low toxicity in the environment. Overall, these copolyesters have good properties and would be suitable to replace petroleum-based commercial poly(ethylene terephthalate) packaging materials.
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INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2023
·
IF 3.4
Ke Jiang,Yuzhu Chen,Jinqiu Qi,Jiulong Xie,Xingyan Huang,Yongze Jiang,Shaobo Zhang,Shanshan Jia,Qi Chen,Hui Xiao
Soy-based adhesives are considered to be a substitute for toxic petroleum-based adhesives in wood industry because of its environmentally-friendly property. However, their application range is limited by the lack of high wet bond strength and high toughness. While it is possible to impart these properties to soy-based adhesives by adding a variety of corresponding modifiers, it is difficult to do so by adding a single modifier. In this work, a multifunctional cross-linking agent dodecanedioic acid diglycidyl ester (DADE) with high reactivity, toughening, and hydrophobic effects was synthesized and incorporated into soy-based adhesive to ameliorate the bonding performance of the adhesives. The reaction process between DADE and protein was confirmed by instrumental analyses. Results revealed that the introduction of 4% DADE increased the wet bond strength of the soy protein adhesive by 140% to 1.57 MPa, whereas the wet bond strength (1.11 MPa) of soybean meal adhesive containing 4% DADE was comparable to that of MUF resin . The micrographs of the fracture surface and the force-distance curves of the shear strength test showed that the toughness of the adhesives was significantly improved by DADE. These improvements were attributed to the long hydrophobic aliphatic chains and highly reactive groups from DADE. This modification method avoided using large amounts of chemical additives. This work may provide an efficient and low-consumption method for producing bio-based adhesives with excellent bonding properties.
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2021
·
IF 3.178
Shuo Cheng,Yu Bao,Yue Cui,Jingtao Wang
In this paper, the solubility and dissolution thermodynamic properties of dodecanedioic acid (DDDA) in four binary-mixed solvents (ethyl acetate + ethanol, ethyl acetate + acetic acid, and ethyl acetate + acetone) were investigated. The gravimetric method was employed to determine the mole fraction solubility of DDDA in different solvent ratios from 288.15 K to 328.15 K under the atmosphere. In the binary solvents of ethyl acetate + ethanol and ethyl acetate + acetic acid, when the composition was varied the solubility change was not monotonous, and the phenomenon of co-solvency occured. Furthermore, four models were employed to fit the solubility data, among which the modified Apelblat equation and CNIBS/R-K model had better fitting results. Finally, the dissolution thermodynamic properties of DDDA were analyzed based on the modified Van’t Hoff equation.
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JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Haozhou Huang,Yuehua Cong,An Du,Bing Hu,Jun Li,Baoyan Zhang
A new series of liquid crystalline dimers containing a cholesteryl group were synthesized, exhibiting multiple mesophases including chiral smectic phases (SmX*, SmC* and SmA*), twist grain boundary phases (TGBA* and TGBC*), and chiral nematic phase (N*). Re-entrant phenomenon occurs, which is rarely reported for pure matters of dimeric liquid crystals. The chemical structure and liquid crystal properties of the dimers were characterized by FTIR, 1 H NMR, DSC, POM and XRD. It was in evidence that the length and the parity of the spacer and the length of the terminal tail were the decisive factors of the mesophase behaviours.
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BIOMACROMOLECULES
·
2023
·
IF 6.2
Qianfeng Wang,Jiayi Li,Jinggang Wang,Han Hu,Yunxiao Dong,Drow Lionel O’Young,Di Hu,Xiaoqin Zhang,Dong-Qing Wei,Jin Zhu
The demand for sustainable development has led to increasing attention in biobased polyesters due to their adjustable thermal and mechanical properties and biodegradability. In this study, we used a novel bioderived aromatic diacid, 2,5-thiophenedicarboxylic acid (TDCA) to synthesize a list of novel aromatic–aliphatic poly(alkylene adipate-co-thiophenedicarboxylate) (PAATh) copolyesters through a facile melt polycondensation method. PAAThs are random copolyesters with weight-average molecular weights of 58400 to 84200 g·mol–1 and intrinsic viscosities of 0.80 to 1.27 dL·g–1. All PAAThs exhibit sufficiently high thermal stability as well as the highest tensile strength of 6.2 MPa and the best gas barrier performances against CO2 and O2, 4.3- and 3.3-fold better than those of poly(butylene adipate-co-terephthalate) (PBAT). The biodegradability of PAAThs was fully evaluated through a degradation experiment and various experimental parameters, including residue weights, surface morphology, and molecular compositions. The state-of-the-art molecular dynamics (MD) simulations were applied to elucidate the different enzymatic degradation behaviors of PAAThs due to the effect of diols with different chain structures. The sterically hindered carbonyl carbon of the PHATh–enzyme complex was more susceptible to nucleophilic attack and exhibited a higher tendency to enter a prereaction state. This study has introduced a group of novel biobased copolyesters with their structure–property relationships investigated thoroughly, and the effect of diol components on the enzymatic degradation was revealed by computational analysis. These findings may lay the foundation for the development of promising substitutes for commercial biodegradable polyesters and shed light on their complicated degradation mechanisms.
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LIQUID CRYSTALS
·
2021
·
IF 0
Hao-Zhou Huang,Yue-Hua Cong,An Du,Bing Hu,Bao-Yan Zhang
A new series of liquid crystalline dimers containing a cholesteryl group were synthesised, exhibiting multiple mesophases including chiral smectic phases (SmC* and SmA*), twist grain boundary phases (TGBA*), and chiral nematic phase (N*). The chemical structure and liquid crystal properties of the dimers were characterised by FTIR, 1H-NMR, DSC, POM and XRD. It was in evidence that the lengths of the terminal tail and the flexible spacer were the decisive factors of the mesophase behaviours.
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