POLYMER COMPOSITES
·
2022
·Vol. 43
·期 8
·5179-5188
·
IF 3.531
Gaoyuan Ye,Zelong Li,Boyuan Chen,Xin Bai,Xu Chen,Yingcheng Hu
In this study, polylactic acid (PLA)/polycaprolactone (PCL)/microcrystalline cellulose (MCC) composites and PLA/PCL/MCC composite compatibilized by the maleic anhydride (MA) copolymer were prepared via two-screw extrusion technology. The mechanical results showed that the strength and break elongation of the ternary composites are decreased with the increase in the MCC contents. After the grafting copolymer was added, due to the better compatibility between the components of the composite, the strength and break elongation of the composite are significantly improved compared with that of ungrafted composite. According to the conducted differential scanning calorimetry (DSC) analysis, the crystallinity of the PLA/PCL/MCC composites is increased with the increase in the MCC content, and the crystallinity of the grafted composites is higher. In addition, the 3D printed PLA/PLAma/PCL/5MCC composite exhibits good biocompatibility and adhesion with MCF-7 cells, thus indicating its bright application prospects as a biomaterial scaffold material in tissue engineering.
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JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 7
·5961-5970
·
IF 3.442
Luo Shuai,Qiao Xuan,Wang Qiu-Yu,Zhang Yun-Fei,Fu Ping,Lin Zhi-Dong,Du Fei-Peng,Cheng Chun
To develop low-cost and high-performance self-healing antifogging coatings, polyvinyl alcohol/hydrolyzed poly(styrene-co-maleic anhydride) (PVA/H-PSMA) coatings were prepared from a mixed solution of polyvinyl alcohol (PVA) and hydrolyzed poly(styrene-co-maleic anhydride) (H-PSMA) via spin coating and annealing. The microstructure, antifogging behavior, and self-healing ability were investigated. High transparency and low surface roughness were observed when the PVA/H-PSMA film was coated on glass slides. The PVA/H-PSMA coatings showed excellent antifogging performance in a warm, humid environment. The coatings also performed well when transferred from a refrigerator to room temperature. The antifogging coatings showed desirable water resistance due to strong chemical bonding between PVA and H-PSMA, as well as excellent self-healing ability due to hydrogen bonding self-assembly in the PVA/H-PSMA structure. The coatings still exhibited excellent antifogging effects after 20 scratching-repairing cycles, illustrating their potential use in practical applications.
研究领域:
材料科学
·
表面化学
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CEMENT & CONCRETE COMPOSITES
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2021
·
IF 7.586
Wenting Li,Qi Wei,Qing Chen,Zhengwu Jiang
Capsule-based self-healing of cementitious materials is a promising solution to improve the serviceability and to prolong the longevity of concrete structures. The successful use of mechanical triggering microcapsules to achieve cracks healing is still challenging and is closely dependent on the breakage of capsules upon crack formation . In this study, self-healing microcapsules were synthesized via complex coacervation using a styrene maleic anhydride (SMA) shell and an epoxy resin adhesive . The SMA/gelatin bi-layer wall formed with gelatin as the out layer for better trigger sensitivity under crack formation. The effects of various preparation parameters, referring to stirring rate, temperature, core-shell ratio and pH, have been investigated by characterizing the microcapsule morphology, shell thickness, size distribution, and chemical nature. The morphology demonstrates the encapsulation ability of SMA/gelatin and the spherical shape facilitates the rupture under crack formation. The elastic modulus and hardness of the microcapsules were determined using nano-indentation to assess the interfacial bonding and likelihood of mechanical triggering. Self-healing functionality of the developed microcapsules were validated in paste according to the in situ Acoustic Emission measurement.
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EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Yupeng Lv,Yecheng Xu,Wenmin Yang,Changjiang Sun,Guiying Li,Zhen Fang,Zhuhui Qiao
The popularity of conductive hydrogels in flexible sensor research stems from their excellent strain responsiveness and efficient conduction capability. In this study, maleic anhydride (MA)-modified soy protein isolate (MSPI) crosslinked with acrylamide (AM) to form a hydrogel with a tensile strength of 225 kPa at an MSPI content of 16 %. Furthermore, the incorporation of 15 % of lithium chloride (LiCl) significantly enhanced the electrical conductivity of the hydrogel (namely MSPI 0.16 Li 0.15 ), mechanical strength (tensile stress ∼ 238 kPa with a fracture strain of 241 %) and swelling resistance. MSPI 0.16 Li 0.15 presented a high conductivity of 2.8 S/m, surpassing that of a plethora of bio-based hydrogels. Additionally, MSPI 0.16 Li 0.15 was successfully employed to monitor the movement of fingers, elbows, knees and other joints, and can successfully maintain strain sensing under different pH conditions (pH 1, 3, 5, 9, 11 and 13) and organic solvents. It demonstrated distinct electrical responses to various strains, making it suitable for sensing human motion. This work contributes to the development of hydrogels with enhanced electrical conductivity and mechanical properties, promising applications in the field of flexible sensors.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 42
·e56117
·
IF 2.7
Mengxia Xu,Jingshun Liao,Zhu Luo,Ruhui He,Shenglong Yang,Hai Li,Yehan Yang
Polypropylene double-grafted maleic anhydride and bisphenol A epoxy resin (PP-g-M-E) was successfully prepared by a single-step method and characterized by Fourier-transform infrared spectroscopy. Subsequently, it was employed as a compatibilizer to fabricate polypropylene (PP)/polyethylene terephthalate (PET) blends via melt extrusion. The content of the PET dispersed phase in the composite varied from 0 to 30 phr. The microstructure and morphology of the composites were characterized using scanning electron microscopy and Raman spectroscopy. The addition of PP-g-M-E increased the interfacial interaction between the two phases and improved the compatibility and thermal stability of the system. In the presence of the compatibilizer, the crystallinity of the matrix phase (PP) increased, while that of the dispersed phase (PET) decreased owing to the heterogeneous nucleation effect of uniformly distributed PET. Double grafting of the PP-g-M-E compatibilizer considerably enhanced the mechanical performance of the PP/PET blend system. The elongation at break of the modified sample exceeded that of the PP/PET blends by 117.55%, and the flexural and impact properties also showed considerable improvement.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Yuli Jing,Yufei Li,Junwen Chen,Kai Cui,Peng Wu,Xiaohong Li
The demand for biodegradable plastics is increasing in line with the growth in environmental protection measures. Consequently, the demand for 1,4-butanediol (BDO), the upstream key raw material for biodegradable plastics, has increased significantly. BDO can be obtained through deep hydrogenation of maleic anhydride (MA). However, due to the complicated network involved in the MA hydrogenation reaction, it is rather difficult to obtain BDO with satisfactory yield via the one-pot deep hydrogenation of MA. In this work, Cu-0.03Fe/SiO2 catalysts were prepared by hydrothermal and co-precipitation methods and applied to the one-pot deep hydrogenation of MA to BDO, affording 92.7-94.4% BDO yield under mild conditions (190 °C, 5 MPa of H2 pressure). This value surpasses the results reported in the literature up to now. Moreover, the Cu-0.03Fe/SiO2 catalyst prepared by a modified hydrothermal method can be reused for at least four times without any distinct loss in activity or selectivity to BDO. A series of techniques were adopted to characterize the Cu-Fe/SiO2 catalysts to gain insights into the structure-performance relationship in the MA hydrogenation to BDO.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Cun-ying Zhang,De-fang Zhao,Yu-hui Xie,Dong Feng,Feng Wu,Delong Xie,Yuxin Liu,Yi Mei
Polylactic acid (PLA) is well regarded for its excellent environmental friendliness; however, its flammability presents a significant barrier to wider applications. Developing highly flame-retardant PLA (with a limiting oxygen index, LOI, greater than 30%) using simple, general methods remains a challenge. In this study, maleic anhydride (MA) was used to modify 9,10-dihydro-9-oxa-10-oxide (DOPO), enhancing its thermal stability and interaction with the PLA matrix. Additionally, by leveraging the carbonization effect of nano-SiO 2 , DOPO-MA was compounded with nanosilica to further improve PLA's flame-retardant properties. As a result, a highly flame-retardant PLA with an LOI of 31.3% and a UL-94 V-0 rating was successfully prepared using 5 wt.% DOPO-MA and 3 wt.% SiO 2 . Furthermore, total heat release (THR) and peak heat release rates (pHRR) of PLA decreased by 7% and 25%, respectively. Detailed analysis of the flame-retardant mechanism revealed that nano-SiO 2 significantly increased the residual char content and promoted the formation of a more stable graphite carbon structure. Moreover, silica effectively suppressed the generation of combustible gases in the pyrolysis products of PLA, collectively enhancing its flame-retardant properties. This study presents a straightforward and scalable approach for designing highly efficient phosphorus/silica-containing synergistic flame retardants, offering valuable insights into PLA flame retardancy.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiayi Xin,Ziyang Song,Bo Zheng,Jiawen Hu,Changwen Zhao,Dong Chen,Wantai Yang
In recent years, synthetic polymers have become integral to modern society, but their improper disposal has led to significant environmental challenges. Therefore, it is of great significance to investigate the environmental impact of polymer waste. Herein, we conducted comprehensive research on the biodegradability of poly(styrene-alt-maleic anhydride) (PSM) when exposed to soil and microbes, as well as its toxic effects on soybean seedlings and Eisenia fetida. The biodegradation process of PSM was thoroughly evaluated using respirometry tests, Fourier transform infrared spectroscopy, gel permeation chromatography, weight loss analysis, and bacterial reproduction tests. After 90 days of incubation in soil, the mineralization ratio of PSM reached 15%, and the weight-average molecular weight gradually decreased from 28.0 to 14.5 kg/mol in the first 14 days. Additionally, PSM experienced a 50% degradation by Pseudomonas aeruginosa after 30 days. In terms of phytotoxicity, PSM showed slight effects on the morphology of soybean seedlings while inducing oxidative stress in roots. The toxic effects of PSM on Eisenia fetida were investigated using both filter paper and soil contact methods. The filter paper contact test showed that the LC50 value was above 1000.0 μg/cm2 at 48 h, while the soil contact test indicated an LC50 value of 93.34 g/kg at 7 days. In conclusion, PSM demonstrates excellent biodegradability and low biotoxicity, suggesting great potential for emerging environmental applications.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiaoning Guo,Tong Song,Dong Chen,Jinchang Zhu,Zhenlin Li,Qing Xia,Li Wang,Wantai Yang
Multi stimuli-responsive aggregation-induced emission (AIE) active polymers have great application prospects in high-tech innovations. Herein, three types of tetraphenylethylene (TPE)-containing monomers were synthesized and utilized in preparing TPE-appended maleic anhydride terpolymers. After hydrolysis, the produced TPE-appended maleic acid terpolymers have identical linear charge densities but different “primary” structures, which created widely varied microenvironments around the carboxylate and TPE groups. Benefiting from the synergistic interaction of the TPE moiety and the terpolymer conformation change, the TPE-appended maleic acid terpolymers exhibited fluorescence changes in response to multi stimuli, including pH, ionic strength, Ca2+, and bovine serum albumin. On both the “signaling” and the “stimuli acceptor” sides, the multi stimuli-responsive fluorescence behavior was influenced markedly by the terpolymer primary structure. The fundamental insights gained in the present work are important for developing an efficient and versatile stimuli-responsive AIE-active polymer platform for chemo-sensing, bioimaging, and so on.
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Xiaojie Shao,Lijuan Su,Jiaojiao Zhang,Zishang Tian,Ning Zhang,Yingxiong Wang,Hongliang Wang,Xiaojing Cui,Xianglin Hou,Tiansheng Deng
The production of chemicals such as phthalic anhydride (PA) from renewable biomass is of crucial significance for sustainable social development. Herein, we demonstrate that a 99.0 mol % yield of PA can be achieved from a Diels–Alder adduct of furan and maleic anhydride on an acid resin catalyst. The active sites on the catalyst were produced by pretreating the resin with acetic anhydride. The excellent performance of the resin catalyst is attributed to its surface enrichment effect on the reactant and good ability to suppress the side reactions. Moreover, the catalyst deactivation mechanism was clarified to be the destruction of the resin skeleton during the reaction. These results will provide a practical route for the future industrial production of PA from renewable biomass.
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GREEN CHEMISTRY
·
2014
·Vol. 16
·期 9
·4351-4358
·
IF 6.852
Jihong Lan,Zhuqi Chen,Jinchi Lin,Guochuan Yin
Catalytic transformation of biomass-based furfural to value-added chemicals is an alternative route to the on-going fossil feedstock-based processes. This work describes catalytic aerobic oxidation of furfural to maleic anhydride, an important polymer starting material having a large market with H5PV2Mo10O40 and Cu(CF3SO3)2 catalysts. Under the optimized conditions, 54.0% yield of maleic anhydride can be achieved with about 7.5% yield of 5-acetoxyl-2(5H)-furanone formation. Notably, 5-acetoxyl-2(5H)-furanone is a highly value-added, biologically important intermediate that has been applied in pharmaceutical synthesis. The catalytic mechanism for furfural oxidation to maleic anhydride and 5-acetoxyl-2(5H)-furanone has been investigated in detail with identification of several key intermediates.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Dongdong Kang,Huiju Shao,Guijing Chen,Xiaoliang Dong,Shuhao Qin
Amphiphilic copolymers have increasingly attracted researchers’ attention to produce the hydrophilic and antifouling polymeric membranes. However, few studies has been reported on systematic manipulation of matrix miscibility to control the membrane microstructure during the nonsolvent induced phase separation (NIPS). Herein, a facile method is brought forward to investigate the effects of miscibility on the structure and performance of the membranes. Through the transformation of styrene-maleic anhydride copolymer (SMA) into sodium styrene-maleic anhydride copolymer (SMANa), a homogeneous and transparent dope solution was successfully prepared. Next, the crescent pores and spherical particles in the PVDF/SMA membrane were eliminated to achieve the uniformly porous PVDF/SMANa membranes by the exchange of nonsolvent and solvent components. Importantly, SMANa could segregate at the external surface and internal pore walls as SMA to enhance the hydrophilicity and antifouling properties of the membranes. Subsequently, by optimizing the dope solution composition and coagulation bath temperature, PVDF/SMANa ultrafiltration membranes exhibited the pure water flux of 1014 L/m 2 h and the rejection to BSA of 98.9%. These results outperformed previously reported ones for similar PVDF composite membranes. Significantly, this strategy can be applied to the large-scale manufacture of membranes.
研究领域:
材料科学
·
膜技术
·
高分子化学
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