MATERIALS LETTERS
·
2023
·
IF 3
Hongmei Zuo,Lihua Zou,Wu Jing,Hongjie Wang,He Wang,Xu Wang,Hao Yin,Fangtao Ruan,Zhenzhen Xu,Diansen Li
Polydopamine (PDA) and carbon nanotubes (CNT) were successively incorporated onto carbon fiber (CF) to enhance surface activity. The impact of PDA and CNT on wettability and mechanical properties of the resulting composites were revealed. Fiber reinforced polylactic acid (PLA) composites were prepared. The results indicated an improved wettability for PDA-CNT modified fibers. Simultaneously, the tensile and bending curves showed brittle and plastic fracture, respectively. Mechanical properties of CF-PDA-CNT/PLA composite significantly outperformed those of CF/PLA composite. The bridging effect of PDA on the CF surface allowed for a tight bond with the matrix PLA , and provided effective load transfer between the matrix and fibers. The application of PDA and CNT on surface modification provides a novel approach for the study of fiber modification.
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高影响因子
CARBOHYDRATE POLYMERS
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2023
·
IF 11.2
Zicong Shi,Liang Liu,Huangjingyi Chen,Chong Tang,Juan Yu,Yimin Fan
In order to explore the possibility of natural carbohydrate polymers as a biodegradable and sustainable fog water harvesting material, this work proposed an efficient substrate (hydrophobic)-transition layer (amphoteric)-coating (hydrophilic) sandwich spin-coating strategy to form all biomass-based Janus film. The oxalic acid hydrolyzed nanochitin (OAChN) was applied as a transition layer that enabled successful spin-coating of the hydrophilic nanocellulose (TEMPO-oxidized cellulose nanofiber , TOCN) and nanochitin (partially deacetylated chitin nanofibers, DEChN) on the hydrophobic polylactic acid (PLA) film substrate. In which a layer-by-layer (LBL) assembling of TOCN (carboxyl-rich negative surface charge) and DEChN (amino-rich positive surface charge) was designed to form a thickness and surface property controllable polysaccharide coating on PLA. The finally formed PLA-OAChN-TOCN/DEChN (LBL) film showed hydrophilic and hydrophobic heteromeric faces at the opposite sides and thus had improved fog water collection capacity of 90.85 mg·cm −2 ·h −1 (30 layers of TOCN/DEChN spin-coated on PLA), which was 276 % higher than the pure PLA film. The transition layer engaged sandwich spin-coating strategy, together with LBL assembling method proposed in this study provided a feasible fabrication of all biomass-based fog water collectors (FWC) that could contribute to alleviating water shortage.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jincui Gu,Peng Xiao,Peng Chen,Lei Zhang,Hanlin Wang,Liwei Dai,Liping Song,Youju Huang,Jiawei Zhang,Tao Chen
Although the construction of superwettability materials for oil/water separation has been developed rapidly, the postprocess of the used separation materials themselves is still a thorny problem due to their nondegradation in the natural environment. In this work, we reported the functionalization of polylactic acid (PLA) nonwoven fabric as superoleophilic and superhydrophobic material for efficient treatment of oily wastewater with eco-friendly post-treatment due to the well-known biodegradable nature of PLA matrix.
研究领域:
材料科学
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环境科学
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生物降解材料
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PubMed
高影响因子
POLYMER TESTING
·
2023
·
IF 5.1
Minzimo Song,Shenghua Li,Guiyou Zhu,Jianwei Guo
It is valuable research to improve the compatibility and toughness of PLA/PCL blends while endowing them with shape memory & 4D printing capability. In this work, lactic acid/caprolactone-modified chitosan (mCS) was used to connect the amorphous region of PLA and PCL to achieve compatibilisation, toughening and 4D printing shape memory ability. The effects of different mCS additions on the morphology, crystalline behaviour, and thermal properties of PLA/PCL blends were observed to study the mechanism of compatibilisation and toughening. Adding 0.5 g mCS into 10 g PLA/PCL blends had the best compatibilisation and toughening effect. At the same time, the blends with this addition ratio had the best shape memory performance after 4D printing. The shape fixity and shape memory ratios of the 4D printing model were as high as 100% and 94.5%, respectively. This work provides a new way to fabricate biomedical devices and bionic components with 4D printing.
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高影响因子
POLYMER
·
2023
·
IF 4.6
Tong Song,Man Liu,Jiaei Tian,Shiwei Wang,Qian Li
In this study, a method for preparing high expansion ratio, high cell density PLA foams based on a combination of titanium dioxide(TiO 2 ) and lignin(Lg) is demonstrated. TiO 2 can act as a rigid core to generate heterogeneous nucleated crystals and increase the strength of the PLA matrix, Lg can be used as a polymer plasticizer with good dispersibility to improve the mobility of PLA molecular chains and reduce the entanglement between molecular chains. By studying the competition and synergy of two nucleating agents in the nucleation process, Lg exhibits a significant nucleation-promoting effect compared to TiO 2 in the case of a single nucleating agent. While adding 5 wt% TiO 2 /Lg, the high content of TiO 2 /Lg provided the best synergistic effect to accelerate the overall crystallization. In addition, the 1 wt% PLA/Lg composite foams prepared in this work also exhibited excellent foaming properties.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 17
·e53775
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IF 3
Kunyan Wang,Yuqi Jiang,Changjin Lv,Qianhui Chi,Yuhua Guo,Peisong Tang,Guoxiang Pan,Qipeng Guo
In this work, an environmentally friendly and energy-saving strategy to decorate Ni-Al layered double hydroxides nanosheets (LDHs@PN) has been utilized to boost their flame retardancy and dispersion in the polymer. This proposed strategy was implemented through noncovalent self-assembly supramolecular aggregate of phytic acid (PA) and 1,4-bis(3-aminoethyl) piperazine (AEP) onto NiAl-LDHs surface in water without any organic solvent. The target product LDHs@PN was investigated by different characterization techniques. It was found that LDHs@PN was successfully fabricated possessing hydrophobic surfaces. In contrast, the surface of LDHs@PN became rough and exhibited a fluffy structure. Meanwhile, Ni, Al, P and N were homogeneously distributed on the surface of LDHs@PN. Significantly, after introducing LDHs@PN into biobased polylactic acid (PLA) via melting-blending, the thermal stability of composites was improved compared to that of pure PLA and LDHs@PN promotes the formation of composite residual carbon. In addition, the PLA/LDHs@PN composite with 20 wt% loadings reached V-0 rating in the UL-94 test and achieved 30.1% limiting oxygen index value, indicating LDHs@PN significantly increased the flame retardant performance of the PLA. The flame retardant mechanism of LDHs@PN in the PLA matrix was analyzed. This facile, low-cost and eco-friendly decorating strategy is promising for industrial production.
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POLYMER COMPOSITES
·
2022
·Vol. 43
·期 6
·3753-3764
·
IF 3.531
Minqi Sun,Ling Zhang,Chunzhong Li
To make up for the brittleness of poly(lactic acid) (PLA), people usually introduce flexible poly(butylene adipate- co -terephthalate) (PBAT) which greatly reduces the strength and limits toughening effect due to unfavorable immiscibility of the blends. Herein, functionalized biodegradable cellulose nanocrystals (CNCs) were used as enhancement to simultaneously improve strength and toughness of PLA/PBAT blend. To improve the interaction between PLA and PBAT, poly(glycidyl methacrylate) (PGMA) was grafted on the surface of CNC via a surface-initiated atom transfer radical polymerization reaction. After the addition of CNC-PGMA30, the phase size of PLA/PBAT (70/30 wt%) reduces dramatically, showing improved interfacial compatibility between PLA and PBAT. Meanwhile, prepared PLA/PBAT/CNC1.0-PGMA30 composite has tensile strength of 49.6 MPa and elongation at break of 268.5%, demonstrating considerably increased strength and toughness in comparison to the pure PLA/PBAT blend.
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EUROPEAN POLYMER JOURNAL
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2015
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IF 3.005
Hongwei Zhang,Qijian Niu,Ning Wang,Jun Nie,Guiping Ma
In this research a thermo-sensitive drug loaded core–shell fibers were prepared by UV photo-polymerization combined with electrospinning technology. The biodegradable polymer polylactic acid (PLA) was used as the core with electrospinning and the N-isopropylacrylamide (NIPAM) was selected to be shell of the fibers via UV photo-polymerization, respectively. Combretastatin A4 (CA4) was used as the model drug loaded in PLA (core structure) to test the thermo-sensitivity of the core–shell fibers. SEM was performed to observe the morphology of the fibers. TEM was carried out to confirm the core–shell structure of the fibers. Furthermore, XPS and FTIR results demonstrated that the core–shell structure had been fabricated as designed. Water contact angle (WCA) test indicated that the fibers show different wettability when the temperature was below or above the lower critical solution temperature (LCST). Moreover, in vitro drug release test was conducted to explore the difference of the drug release when the temperature was at 25 °C and 40 °C. The cell culture studies showed that the prepared core–shell structure nanofibers have a potential application in the biomedical fields as tissue engineering.
研究领域:
生物材料
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药物递送
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组织工程
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高分子科学
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纳米医学
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高影响因子
Journal of Food Measurement and Characterization
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2026
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IF 3.6
Kou Haijuan,Zou Kai,Wang Rong,Jin Lili,Luo Shipeng,Liu Guihua,Shao Chenjie,Zhou Zhirong,Chang Jiayin
As popular food packaging materials in the biodegradable plastic market, plant-fiber/PLA composites (PFPCs) require comprehensive evaluation to ensure their safety. In this work, semi-volatile organic compounds migrated from three batches of PFPC were characterized via gas chromatography coupled with quadrupole time-of-flight mass spectrometry. A total of 44 compounds were identified in the 4% (v/v) acetic acid food simulant and 95% (v/v) ethanol food simulant. Ten of them were authorized, but the eugenol migration exceeded the limit of detection in GB 9685–2016. The risk of the other 34 compounds were assessed according to the threshold of toxicological concern. Among them, 21 compounds were assessed as Cramer rule I, and the rest were assessed as Cramer rule III. Ethyl 5,6-dimethoxyindole-2-carboxylate, furfural, tributyl citrate, and caffeine have the greatest potential risks among Cramer class III substances. To systematically investigate the cumulative migration patterns of potentially hazardous compounds, 20 migration tests were conducted to evaluate the risk associated with repeated use of PFPC. As a result, the concentrations of Cramer class III substances in 95% (v/v) ethanol were greater than those in 4% (v/v) acetic acid after repeated migration tests, indicating that the samples presented greater health risks when they were in contact with food containing alcohol or grease than when they were in contact with acidic food.
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高影响因子
POLYMER BULLETIN
·
2026
·Vol. 83
·期 6
·299
·
IF 4.2
Song Kangjia,Liu Jie,Zhang Feifei,Lu Aide,Jin Liqiang,Zhao Zecui,Nian Xinyue,Song Jianan,Zhu Deyi
To mitigate plastic pollution and reduce reliance on fossil fuels, the development of high-performance polymeric coatings from renewable resources to mitigate plastic pollution and reduce reliance on fossil fuels remains a critical challenge. Among them, substituting petroleum-based isocyanates with bio-based 1,5-pentanediisocyanate (PDI) not only significantly reduces the carbon footprint but also provides a key green feedstock for developing high-performance biodegradable polyurethanes. In this study, bio-based poly (lactic acid) polyol (PLA) and PDI were utilized as the raw materials. By incorporating polytetramethylene glycol (PTMEG) into the soft segment of waterborne polyurethane (WPU), a series of PLA/PDI bio-based waterborne polyurethanes (PP-WPU-Ts) were synthesized. The results demonstrate that PP-WPU-3 (n PLA : n PTMEG = 5:5) achieved a high bio-based content of 53.1 wt% along with a balanced combination of mechanical properties, including a tensile strength of 4.02 MPa, an elongation at break of 1118.6%, and a toughness of 26.7 MJ/m 3 . Additionally, PP-WPU-3 exhibited outstanding wear and yellowing resistance, reaching 80,000 abrasion cycles and a grade 1 yellowing resistance (ΔE = 2.8). Most importantly, the material exhibited controllable degradation across various environments: rapid disintegration in alkaline media (65% weight loss in 6 h), efficient biodegradation in soil (54.3% in 120 days), and synergistic mineralization by Bacillus sp. (19.3% in 15 days), offering a promising end-of-life solution. The optimized PP-WPU-3 possesses balanced mechanical properties while also exhibiting excellent yellowing resistance and degradation capabilities. These characteristics validate its potential as an eco-friendly alternative for organic coatings.
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高影响因子
Emergent Materials
·
2026
·Vol. 9
·期 5
·109
·
IF 4
Khudher Raad H.,Hasan Ahmad A.,Albayati Talib M.,Zendehboudi Sohrab,Saady Noori M. Cata
In this study, eco-friendly ultrafiltration (UF) membrane is developed using a blend of polyacrylonitrile (PAN) and polylactic acid (PLA) polymers. The UF membrane is modified with green additive nanoparticles (NPs) derived from onion peel waste (OPW), to enhance anti-fouling performance in oily wastewater treatment. The PAN/PLA/OPW membrane is prepared using a phase inversion technique and systematically investigated using FTIR, FE-SEM, AFM, EDX, along with contact angle measurement, porosity determination, mechanical strength testing, and surface roughness evaluation. The effects of varying OPW NP loadings (0.025–0.15 wt.%) on membrane properties and performance are examined. At a membrane loading of 0.1 wt.%, it exhibits a significant enhancement in performance, with an improvement in pure water flux to 931 L/m 2 .h from 524 L/m 2 .h for pristine PAN/PLA, driven by improved hydrophilicity (contact angle reduced from 66.8° to 34.6°), porosity (69% to 95%), and tensile strength (7.81 to 11.7 MPa). Under a feed at an oil concentration 50 ppm and a pressure 2 bar, the modified membrane achieves an oil rejection of 65.8%, which increases to 100% at 550 ppm, highlighting its strong performance at higher contaminant loads. The flux recovery ratio (FRR) reaches 95.8%, leading to enhanced anti-fouling properties. Surface roughness decreases, enhancing foulant resistance. After four operation-cleaning cycles, oil rejection efficiency remains stable with only a slight decline in flux. The modified membrane demonstrates reliable chemical and operational stability, showing its ability to operate continuously for 48 h without noticeable performance degradation, exhibiting its compatibility with water treatment environments containing complex chemical components. Utilizing low-cost agricultural waste as a source of NPs contributes to reducing the environmental footprint and promoting the concept of a circular economy within engineering solutions. The residual oil content in the effluent remains below 5 ppm, aligning with World Health Organization (WHO) environmental discharge standards. Overall, the PAN/PLA/OPW membranes demonstrate high separation efficiency, durability, and environmental sustainability, thus qualifying them as promising candidates for industrial oily wastewater treatment.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Wenhui Fu,Duo Yu,Aiping Zhan,Hou-Yong Yu
Solar-enabled thermal regulation is important for agricultural protection applications, yet it remains challenging to simultaneously achieve mechanical robustness, environmental stability, and degradability in biodegradable polymers. Here, a novel bioinspired brick-mortar-reinforcement architecture was designed to construct a multifunctional PLA-based film. In this design, the PLA matrix serves as the load-bearing 'bricks', the polydopamine-calcium carbonate stabilized enzymes act as the functional 'mortar', and the hydrophobically modified cellulose nanocrystals (DPC) function as the 'reinforcing bars', collectively forming a hierarchically integrated structure. Benefiting from this multiscale architecture, PCPM7% exhibits significantly enhanced mechanical performance, with a tensile strength of 32.5 MPa and an elongation at break of 186.9%. The engineered structure also imparts excellent UV shielding (UPF 2000), improved hydrophobicity (water contact angle of 101.2°), and effective solar-to-thermal conversion, enabling stable heat retention under fluctuating environments. The embedded enzyme system enables stage-dependent biodegradation after service, achieving a mass loss of 78.3% within 180 days. This work provides a comparative design strategy for developing high-performance photothermal agricultural films.
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高影响因子
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