POLYMER COMPOSITES
·
2025
·Vol. 47
·期 1
·803-820
·
IF 4.7
Chunxiu Liu,Chunhui Zhang,Jianhong Liu,Chengxue Li,Huikai Nan,Ziyue Zhang,Yubing Dong
To improve the mechanical property of poly (butylene adipate-co-terephthalate) (PBAT), the bamboo powder/polylactic acid (PLA)/PBAT (BPP) composites were prepared by melt-blending, and the NaOH solutions treated bamboo fiber (BF)/BPP composites were prepared by a hot-pressing molding approach. The effects of BF on the structure and properties of the BF/BPP composites were studied. The results showed that the BF mat significantly improved the mechanical properties of the composites, especially those reinforced with a double-outer-layer BF mat. The tensile strength and Young's modulus of the 4 wt% NaOH solution pretreated-BF reinforced BPP composites were 19.0 and 257.9 MPa, respectively. In addition, the BF/BPP composites had good shape memory properties, with shape memory fixity ratio ( R f ) and shape memory recovery ratio ( R r ) reaching 97.8% and 82.2% under 120°C, respectively. The R r of the composites gradually increased with the concentration of NaOH solutions. This study may provide a feasible reference for the research and application of the PBAT-based biodegradable composites modified with natural reinforcing materials.
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高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Chunying Si,Yueru Li,Haoyi Wang,Quanxing Zhang,Haodi Wu,Wei Jiang
Although extremely attractive for biomedicine, degradable hydrogels often suffer from poor mechanical properties and bacterial contamination. Herein, ultrafine calcium phosphate oligomers (CPOs, 9 wt.‰) and tannic acid (TA) were integrated into a poly(acrylamide-co-lactic acid) (PAMLA) hydrogel to construct a composite hydrogel PAMLA-CPO9/TA with a dynamic multinetwork architecture. In this sustainable and synergistic reinforcement strategy, CPOs serve as inorganic cross-linking nodes that enhance mechanical robustness and resistance to deformation, while TA introduces reversible hydrogen and coordination bonding, providing additional structural stabilization and bacterial antiadhesion properties. The resulting PAMLA-CPO9/TA hydrogel exhibited a tensile strength of 0.19 MPa at 398% elongation and a compressive strength of 2.81 MPa at 80% strain, representing a 4-fold enhancement in the mechanical response over pristine PAMLA. The relative bacterial adhesion of Escherichia coli on the PAMLA-CPO9/TA hydrogel was reduced by over 99% compared to PAMLA, demonstrating excellent biocompatibility by maintaining >92% HeLa cell viability. The synergistic inorganic–organic, calcium phosphate–polyphenol interactions enabled significantly improved mechanical properties and excellent bacterial-repelling and biocompatibility of the PAMLA-CPO9/TA hydrogel, holding a great potential for designing sustainable, multifunctional, and degradable materials for wound-dressing applications.
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高影响因子
Micromachines
·
2026
·Vol. 17
·期 8
·910
·
IF 3.5
Chunmei Wang,Congyi Zhu,Qi Zhang,Shuangsheng Zhang,Ling Zhang,Jiang Wu,Guoliang Zhang
Titanium and titanium alloys have been widely used in clinical implants such as dental implants due to their high strength and corrosion resistance. However, their inherent biological inertness and mismatch with the elastic modulus of human bone tissue restrict bone healing and reconstruction. In this study, pure titanium was first modified by micro-arc oxidation (MAO), and then a biodegradable soybean protein isolate (SPI)/polylactic acid (PLA)–polycaprolactone (PCL) composite coating was prepared by using the spin-coating method. The coating was systematically characterized by scanning electron microscopy (SEM), an energy spectrometer (EDS), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and atomic force microscopy (AFM), confirming that the composite coating was successfully prepared. An evaluation of the physical and chemical properties showed that the introduction of SPI significantly improved the hydrophilicity, surface roughness and adhesion to the substrate of the coating, regulated the degradation rate, and reduced the elastic modulus to the range of 10–30 GPa, which matches human bone tissue. At the same time, it enhanced corrosion resistance. In vitro MC3T3-E1 osteoblast experiments showed that the coating containing 50% SPI showed better cell compatibility, adhesion ability and osteogenic inducibility, and all groups had good blood compatibility. The SPI/PLA–PCL composite coating effectively improves the biological activity of the pure titanium surface and provides a feasible strategy for the surface modification of titanium implants and bone defect repair.
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Jingjing Gao,Yadong Wang,Li Ma,Zongmin Zhu,Fei Xiao
The development of biodegradable polymers with excellent flame retardancy and mechanical robustness remains a critical challenge for sustainable materials. In this paper, a novel MXene nanohybrid (MXene-PPD) was prepared by grafting organic phosphorus-containing polymer onto MXene using interface engineering strategy. The incorporation of merely 2.5 wt % MXene-PPD into poly(lactic acid) (PLA) matrix remarkably enhances its flame retardancy, elevating the limiting oxygen index (LOI) from 19 % to 23.1 % and achieving a UL-94 V-0 rating. Cone calorimetry analysis demonstrates a 11 % reduction in peak heat release rate (PHRR) for the PLA/2.5MXene-PPD composite compared to neat PLA. The superior interfacial adhesion of MXene-PPD in PLA composites facilitates efficient stress transfer, resulting in demonstrated enhancements of up to 13.6 % in tensile strength and 13.9 % in impact resistance compared to unmodified PLA. These findings highlight the potential of MXene-PPD as an effective additive for developing high-performance biodegradable polymers.
研究领域:
材料科学
·
高分子化学
·
可持续材料
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DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2025
·
IF 2.3
Mao Wenqiang,Li Jiapeng,Wang Dongdong,Pan Yanxiong,Ji Xiangling,Jiang Wei
Hot melt adhesives are utilized in a variety of industries because to their solvent-free, strong adhesion and rapid curing. With the increasing awareness of environmental protection, biodegradable hot melt adhesives have received attention. Herein, chlorinated poly(propylene carbonate) (CPPC)/poly(butylene succinate) (PBS)/poly(lactic acid) (PLA) blends were prepared using diphenylmethane diisocyanate (MDI) as reactive compatibilizer. Thermogravimetric analysis (TGA) demonstrated that adding PLA improved the thermal stability of the blends. From rheological tests, the melt elasticity and viscosity of the blends at 170 ℃ were enhanced after PLA was added. The tensile strength of CPPC/PBS/PLA/MDI blends reached 47.9 MPa as 32 wt% of PLA was added. When PLA content was 16 wt%, the blends exhibited high adhesion strength (13.97 MPa), which was much higher than that of common commercial products. In addition, the enzymatic degradation tests showed that the blends had biodegradability. Therefore, CPPC/PBS/PLA/MDI blends have the potential to be used in biodegradable hot melt adhesives. Graphical CPPC/PBS/PLA/MDI blends with different PLA contents were prepared by in situ compatibilization. The biodegradable CPPC/PBS/PLA/MDI blends had good mechanical and adhesive properties.
研究领域:
材料科学
·
高分子科学
·
胶粘剂技术
·
环境科学
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2013
·
IF 4.093
Ailin Gao,Fu Liu,Lixin Xue
Bio-based poly (lactic acid) membrane with asymmetric porous structure was developed for hemodialysis via phase inversion for the first time. Heparin was immobilized to PLA membrane surface through the strong adhesion ability of dopamine, as confirmed by attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) respectively. The morphologies variations of PLA membranes induced by dopamine coating and heparin immobilization were analyzed by scanning electron microscope (SEM) and atomic force microscopy (AFM). Hydrophilicity and permeability of PLA membranes before and after modification were characterized. Particularly, platelet adsorption, plasma recalcification time and hemolysis ratio were executed to evaluate the blood compatibility of PLA membranes decorated by heparin. The in vitro results demonstrated that surface heparinization improved the hemocompatibility of PLA membrane, suppressed the adhesion of platelet, extended plasma recalcilication time, and also decreased hemolysis ratio. The dialysis simulation experiments including urea and lysozyme clearance as well as bovine serum albumin (BSA) rejection were implemented to determine the dialysis performances. The results showed that 79% of urea and 18% of lysozyme were cleaned and over 90% of BSA was retained. This study disclosed a window of opportunity to produce novel hemodialysis membranes using bio-based materials.
研究领域:
生物医学工程
·
材料科学
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DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 60
·34880-34887
·
IF 3.049
Wei Li,Zhengqiao Zhang,Jie Wu,Zhenzhen Xu,Zhi Liu
To investigate the influence of phosphorylation/caproylation on the adhesion of cornstarch to polylactic acid (PLA) and cotton fibers for improving its applications, such as in PLA and cotton sizing, herein, a series of phosphorylated and caproylated cornstarch (PCS) samples with different total degrees of substitution (DS) were synthetized by the phosphorylation of acid-converted cornstarch (ACS) with sodium tripolyphosphate (STP) and subsequent caproylation with caproic anhydride (CA). The PCS granules were characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The adhesion was evaluated by determining the bonding forces of the impregnated PLA and cotton roving. The results of the adhesion measurements were also analyzed, especially for the wetting and spreading of the pastes on the fiber surfaces as well as the failure type and internal stress of the adhesive layers among the fibers. In addition, the viscosity stabilities of the pastes were determined. The results showed that phosphorylation/caproylation was capable of obviously improving the adhesion of starch to PLA and cotton fibers. As the total DS increased, the bonding forces gradually increased. The two substituents improved the wetting and spreading, reduced the internal stress, lowered the layer brittleness, and decreased the probabilities of interfacial failure and cohesive failure, thereby favoring the improvement of the adhesion. The PCS samples with stabilities above 85% could meet the stability requirement for sizing. Based on the experimental results of the adhesion and the analysis of the results, it can be concluded that PCS shows potential for applications in PLA and cotton sizing.
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2023
·Vol. 31
·期 8
·3573-3584
·
IF 5.3
Chen Zixuan,Sun Fei,Zhao Huakun,Yu Tao,Yang Weidong,Li Qian,Li Yan
Poly (lactic acid) (PLA) is a bio-based polymer that is derived from renewable plant resources, such as corn, cassava, and other crops. It has a wide range of potential applications. However, currently, the PLA produced on an industrial scale is a thermoplastic polymer, which has poor mechanical strength and poor flame retardancy. These mediocre properties limit its potential uses in housings, structural interior of automotives, and packaging. The present study aimed to overcome the limitations of thermoplastic PLA by developing a synthesis route for producing thermosetting PLA with improved flame retardancy. The synthesis involved reacting 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) with itaconic acid (IA), polymerizing the product with pentaerythritol (PENTA) and lactic acid (LA) oligomer, and end-functionalizing with methacrylic anhydride (MAAH). The success of the synthesis was confirmed by analyzing the results of Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance ( 1 H NMR) analysis. The curing kinetics is elaborated by Kissinger’s and Crane’s methods with outstanding fitting. Increasing the LA-to-PENTA ratio results in higher molecular weight and larger arm length, leading to less crosslinking density and lower phosphorus content. A 10:1 LA-to-PENTA mole ratio contributes to UL-94 V1 ranking, 24% limit oxygen index (LOI), 183 kJ/g heat release capacity (HRC), and 21.4 kJ/g total heat release (THR) indicating the admirable flame retardancy. The development of flame-retardant thermosetting PLA could be a significant step forward in expanding its potential applications and improving its properties.
研究领域:
材料科学
·
化学工程
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 1
·
IF 1.64
Zhu Xiong,Xinyan Dai,Haining Na,Zhaobin Tang,Ruoyu Zhang,Jin Zhu
In this manuscript, a toughened PLA/nanosilica composite with good storage stability was obtained in the presence of the epoxidized soybean oil (ESO). The composite was fabricated via a twin-screw extruder, and characterized by the FTIR, selective distribution test, and SEM. The surface of nanosilica was modified by the ESO through the chemical bonding, and this rendered the nanosilica to selectively localize in ESO droplets in the composite. As a result, the PLA/nanosilica composite was changed from brittleness to ductility with the addition of ESO. For example, the elongation and notched impact strength of the PLA/silica/ESO nanocomposite with 5 wt % nanosilica and 15 wt % ESO were ∼42% and ∼11 KJ/m 2 , respectively, which were much higher than neat PLA or PLA/nanosilica composite without ESO. Furthermore, the change of the brittle fracture of PLA into ductile fracture was investigated by SEM micrographs in detail. A possible toughening mechanism was also proposed. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41220.
研究领域:
材料科学
·
高分子化学
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 15
·10920-10932
·
IF 2.993
Qian Shaoping,Sheng Kuichuan,Yu Kai,Xu Linqiong,Fontanillo Lopez Cesar A.
Poly(lactic acid) (PLA) is a potential green alternative for conventional petroleum-based plastics. However, the brittleness limits its application (e.g., agricultural films, garbage bags, plastic bags, food containers, food packaging). In this study, silane-compatibilized (triethoxyvinylsilane, A-151) bamboo cellulose nanowhiskers (BCNW) were introduced into a PLA matrix to toughen the composites. The A-151 successfully grafted on the surface of cellulose, and the thermal degradation stability of BCNW decreased after A-151 modification. Morphological, tensile and thermal properties of the toughened PLA bionanocomposites were investigated, and the toughen mechanism was clarified. The silane linked BCNW and PLA via Si–O–C bonds and hydrogen bonds. Elongation at break of the composites remarkably increased from 12.3 ± 1.7% (untreated) to 213.8 ± 21.6% (16 wt% A-151 treated). Both tensile strength and modulus decreased with the silane treatment. Typical toughness fracture characteristic (wire-drawing) was observed on the fractural surface. Glass transition temperature and crystallinity decreased from 45.6 °C/30.33% (untreated) to 33.6 °C/13.23% (16 wt% A-151 treated).
研究领域:
材料科学
·
生物复合材料
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Tianchi Chen,Jie Guo,Hao Xu,Jialu Zhang,Ningning Hu,Hongtao Liu
Various types of functional materials incorporating superhydrophobic components have been rapidly developed for efficient oil/water separation. The post-processing of these used separated materials remains a challenging problem due to their non-biodegradable characteristics in natural environments, thus easily contributing to secondary contamination. Herein, we report a biodegradable superhydrophobic PLA fabric with hierarchical coral-like micro/nano structures by a one-step spraying method. The as-prepared PLA fabric was found to be both superhydrophobic and superoleophilic with a static water contact angle of 161 ± 2° and an oil contact angle of 0°. In addition, the as-prepared PLA nonwoven fabrics also revealed efficient continuous oil separation efficiency (>97.5%) and tiny water droplet collection efficiency, as well as high oil flux ranging from 2239 L·m −2 ·h −1 to 59,713 L·m −2 ·h −1 . Furthermore, these fabrics retained their inherent wetting property and oil separation ability in a variety of acidic and basic solutions, 3.5 wt% NaCl solution, hot (100 °C), and freezing (0 °C) temperatures. This study provides a novel and environmentally friendly method for preparing biodegradable oil–water separation materials with green post-treatment characteristics when compared to the non-biodegradable separation materials, indicating potential applications in the fields of green water treatment and petroleum refining.
研究领域:
材料科学
·
环境科学
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2018
·
IF 4.92
Kuichuan Sheng,Shen Zhang,Shaoping Qian,Cesar A. Fontanillo Lopez
We prepared poly(lactic acid) (PLA)/bamboo cellulose nanowhiskers (BCNW) bionanocomposite with a high toughness but a low modulus in the previous work. In this paper, a new reinforcement, silane surface-modified ultrafine bamboo-char (UFBC), was employed to strengthen the binary PLA/BCNW bionanocomposite. The ternary bionanocomposite films were fabricated by a solution casting with different contents of surface-treated UFBC in the range of 0.25 wt% to 4.0 wt%. The functionalization of UFBC with (3-mercaptopropyl)trimethoxysilane (A-189) favored its dispersion in the PLA matrix; sea-island and nuclear-shell characteristics were observed by the scanning electron microscopy (SEM) and transmission electron microscopy (TEM). When the UFBC content was 0.25 wt%, the tensile strength and elongation at break increased by 99.26% and 104.93%, respectively, comparing to the neat PLA. Differential scanning calorimetry (DSC) results showed that glass transition temperature , crystallization temperature , crystallization enthalpy and crystallinity increased with the increase of UFBC contents. Thermogravimetric analysis demonstrated that the thermal degradation stability decreased with the UFBC addition. BCNW and UFBC produced a synergistic effect on composites’ toughening and strengthening. These results provided a basic understanding of PLA enhancement mechanism and a simple approach for PLA composite manufacture with sound mechanical properties .
研究领域:
材料科学
·
复合材料工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）