JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 37
·49103
·
IF 2.52
Beirong Ye,Chao Jia,Ziwei Li,Lei Li,Qiang Zhao,Jinshu Wang,Hui Wu
With the ever frequent of industrial organic solvent emissions and oil spillages, the development of high efficiency oil/water separation materials has attracted extensive attention. Here, PLA-based nanofiber membranes modified with metal oxides (SiO 2 , TiO 2 , Al 2 O 3 , and CeO 2 ) are fabricated through blow spinning the mixed solution of polylactic acid (PLA) and metal oxide nanoparticles (NPs). Results shows that the addition of SiO 2 NPs significantly increases the hydrophobicity of the membranes, while maintaining the excellent superoleophilicity. The PLA/SiO 2 nanofiber membranes demonstrate a higher separation performance than pure PLA, PLA/TiO 2 , PLA/Al 2 O 3 , and PLA/CeO 2 nanofiber membranes with high separation efficiency (~100%) and permeation flux (17,800 L m −2 h −1 for n-heptane), as well as prominent oil adsorption capacity (19.9 g/g for n-hexane). The successful fabrication of metal oxides modified PLA nanofiber membranes with high separation and adsorption ability, and excellent durability hold great application potential in the field of oily wastewater treatment.
研究领域:
材料科学
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环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Bio-Design and Manufacturing
·
2021
·Vol. 4
·期 4
·867-878
·
IF 6.302
Ma Suqian,Jiang Zeyu,Wang Meng,Zhang Lan,Liang Yunhong,Zhang Zhihui,Ren Lei,Ren Luquan
Abstract Shape memory polymers (SMPs) are a promising class of materials for biomedical applications due to their favorable mechanical properties, fast response, and good biocompatibility. However, it is difficult to achieve controllable sequential shape change for most SMPs due to their high deformation temperature and the simplex deformation process. Herein, shape memory composites based on polylactic acid (PLA) matrix and semi-crystalline linear polymer polycaprolactone (PCL) are fabricated using 4D printing technology. Compared with pure PLA, with the rise of PCL content, the 4D-printed PLA/PCL composites show decreased glass transition temperature ( T g ) from 67.2 to 55.2 °C. Through the precise control of the deformation condition, controllable sequential deformation with an outstanding shape memory effect can be achieved for the PLA/PCL shape memory composites. The response time of shape recovery is less than 1.2 s, and the shape fixation/recovery rates are above 92%. In order to simulate sequential petal opening and sequential drug releasing effects, a double-layer bionic flower and a drug release device, respectively, are presented by assembling PLA/PCL samples with different PLA/PCL ratios. The results indicate the potential applications of 4D-printed PLA/PCL composites in the field of bio-inspired robotics and biomedical devices. Graphic abstract
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
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.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 11
·115701
·
IF 1.62
Lan Zhang,Suqian Ma,Haohua Xiu,Zhaohua Lin,Zhihui Zhang
It has been found that PLA/PEEK blends have excellent mechanical properties and shape memory properties. In this article, the properties of PLA/PEEK blends were further studied. The mechanical properties of PLA/PEEK blends may be directly or indirectly affected by the molding temperature, molding method and heat treatment conditions. In this paper, PLA/PEEK blends were prepared under different processing conditions (molding temperature, molding method and heat treatment conditions) to evaluate the effects of different processing conditions on the mechanical properties of PLA/PEEK blends. In order to determine the lifting force of PLA/PEEK blends under different conditions, the effects of blends proportion and deformation temperature on the deformation force during the shape memory process were investigated. The experimental results show that the mechanical properties of PLA/PEEK blends can be improved by controlling the preparation conditions, and the deformation time and force can be effectively controlled by the proportion of the blends and recovery temperature.
研究领域:
材料科学
·
工程学
✓ 已验证
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2021
·
IF 5.89
Ou Zhiqiang,Zhou Qi,Rao Xin,Yang Haifeng,Huo Chunqing,Du Xueyu
Waste rubber wood (RW) is the castoff of rubber plantation with abundant reservation but without high-value utilization. In this study, cellulose with high purity has been efficiently isolated from waste RW and further processed into cellulose nanocrystals. By means of acetylation, more hydrophobic cellulose-based products, namely acetylated rubber wood cellulose (Ac–RWC) and acetylated rubber wood cellulose nanocrystals (Ac–RW–CNC) had been attempted as reinforcing fillers for fabricating two series of PLA-based composite films via spin coating instead of currently prevailing melt compounding technique. To ensure a uniformed dispersion of fillers in PLA matrix, the addition of reinforcing filler should be equal to or less than 5% based on the film dry weight. Compared with pure PLA film, the Ac–RWC reinforced PLA composite films are more thermally stable, while the Ac–RW–CNC reinforced PLA composite films on the other hand exhibit more enhanced performance in mechanical properties and the degree of crystallinity. The highest tensile strength (55.0 MPa) and Young’s modulus (3.9 GPa) were achieved for 5%Ac–RW–CNC/PLA composite film.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 120
·99418-99424
·
IF 3.84
Jinda Fang,Ke Zhang,Jingwei Jia,Zhengke Wang,Qiaoling Hu
To improve the drug-loading capacity and control the initial release of amphiphilic drug carriers, a series of N-phthaloyl-chitosan-g-(PEO–PLA–PEO) compounds were synthesized with well-defined structures. The self-assembly behavior of copolymers in aqueous solutions was confirmed by various techniques such as fluorescence spectrometry, dynamic light scattering, and transmission electron microscopy. The results demonstrated that the micellization behavior of graft copolymers was different from that of their linear counterparts. The micelle sizes of the graft copolymers could be tuned with chemical composition as well as temperature. Furthermore, when hydrophobic indomethacin was loaded into the micelles, the graft copolymer micelles trapped more indomethacin than PEO–PLA–PEO micelles, facilitating the in vitro control of the initial burst release of the drug. Drug release could be controlled in vitro by simply altering the EO/LA ratio of the grafting chains. The graft copolymer showed low cytotoxicity to 293T cells, indicating its great potential application for drug delivery.
研究领域:
生物材料学
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药剂学
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产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2021
·Vol. 21
·期 4
·2174-2184
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IF 0
Zhang Diansen,Xia Yuzheng,Gong Hongliang,Zhang Dong,Chen Xiaonong,Shi Shuxian,Lei Lei
Polylactide-b-poly(N-isopropylacrylamide)-b-polystyrene (PLA-b-PNIPAM-b-PS) triblock copolymers (tri-BCPs) with various chemical compositions (block ratio) were prepared from the combination of ring-opening polymerization and reversible addition-fragmentation
chain transfer polymerization. Subsequently, the self-assembling behaviors of these tri-BCP films obtained from spin-coating were investigated by annealing them under different solvent atmosphere. We found that these films could self-assemble into various morphologies due to the microphase
separation of incompatible copolymer blocks. Atomic force microscopy confirmed the perpendicular cylindrical morphology self-assembled from PLA4.5k-b-PNIPAM5.2k-b-PS22.4k tri-BCP film under mixed solvent atmosphere of toluene/acetone (7:3, v/v).
Self-assembled PLA cylinders are evenly distributed among the PS matrix and perpendicular to the film surface, with PNIPAM component taking place at the PLA/PS interphase. Furthermore, by etching the degradable PLA component, porous PS film decorated with PNIPAM “brushes” hoisting
channels were generated. This work provides a facile method and detailed protocol for fabricating stimuli-responsive porous films which are promising for thermoresponsive “smart” separation technologies.
研究领域:
材料科学
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高分子化学
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纳米技术
✓ 已验证
DOI
PubMed
POWDER TECHNOLOGY
·
2025
·
IF 4.6
Wanjun Li,Dongming Zou,Binling Chen,Yuan Wang
The application of selective laser sintering (SLS) across various industries is limited by the narrow range of available polymers. It is essential to develop new materials for SLS using sustainable methods. In this study, poly(lactic acid)/poly(butylene adipate- co -terephthalate) (PLA/PBAT) composite powders with great flowability were prepared in different ratios using thermally induced phase separation (TIPS). The particle size, morphology, and wide sintering window of the PLA/PBAT composite powders demonstrated their suitability for SLS. Optimized process parameters enabled the successful manufacturing of various specimens via SLS. Tensile tests revealed that the addition of PBAT improved the mechanical properties of the composite, with 3.5 wt% PBAT yielding the best results. PLA/PBAT composite powders produced via this environmentally friendly method were shown to be viable for use in SLS.
研究领域:
材料科学
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增材制造
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聚合物工程
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可持续性科学
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
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2025
·
IF 7.4
Shun Chen,Shuhan Ye,Wei Wang,Lingxin He,Wenwen Guo
Bio-based flame retardants are of great significance for ecological environments, sustainable development and human health. Herein, a novel DOPO-based furan-containing flame retardant (FAD) was successfully prepared by DOPO and bio-based compounds (furfural and furfurylamine) via the Schiff base-addition reaction. Subsequently, flame-retardant nonwoven materials with excellent thermal stability, flame retardancy, and carbonization performance were obtained by solution blow spinning technology. The thermal stability and flame-retardant property of the original PLA nonwoven material and the flame-retardant PLA nonwoven materials were analyzed by TGA, LOI, UL-94 flammability tests, and cone calorimetry. Compared to the original PLA nonwoven material, the flame-retardant nonwoven materials showed significantly improved flame-retardant properties. When the addition amount of the flame retardant FAD was 10% (P-FAD-10), the LOI of P-FAD-10 significantly reached 31%, and the peak heat release rate (PHRR) and total heat release (THR) decreased by 14.9% and 21.4%, respectively, compared to the original PLA nonwoven material. Additionally, P-FAD-10 passed the UL-94 V-0 rating with better anti-dripping. This novel P and N-containing bio-based flame retardant FAD and its flame-retardant PLA nonwoven material provide a green and efficient solution for developing high-performance, bio-based flame-retardant nonwoven materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Food Packaging and Shelf Life
·
2025
·
IF 10.6
Liangliang Zhang,Hanbo Yi,Saisai Feng,Mengmeng Zhang,Yu Wu,Jiahui Hao,Xuefang Liu,Jianguo Xu
Chitosan (CS) and polylactic acid (PLA) are both commonly used packaging materials in the food industry. However, a bilayer film made from CS and PLA, simultaneously incorporated with a complex essential oil-loaded Pickering emulsion (PE) system, have not been widely investigated. Therefore, this study designed bilayer films consisting of PLA layer and a PE layer. In the PE layer, binary nanoparticles composed of soybean protein isolate (SPI) and CS were used as solid supports to load increasing amounts (0 %, 2 %, 4 %, 6 %, 8 %, v/v) of complex essential oils (carvacrol and thymol, CT). The films were labeled BF-CT0, BF-CT2, BF-CT4, BF-CT6, and BF-CT8. The characteristics and functional properties were evaluated, along with the quality changes in refrigerated pork wrapped with the films (BF-CT0 or BF-CT8). Results indicated that CT addition significantly enhanced the stability of the PE. The PE layer with higher CT doses exhibited a denser microstructure, more hydrophobic surface, improved elongation at break, and greater water resistance. CT addition significantly improved light and gas barrier functions. Notably, the BF-CT8 film demonstrated extremely low water vapor and oxygen permeability (1.25 ± 0.06 kg•m⁻¹•s⁻¹•Pa⁻¹ and 0.24 ± 0.01 kg•m⁻¹•s⁻¹•bar⁻¹, respectively). All films showed a similar semi-crystalline structure, and CT addition decreased crystallinity. As expected, BF-CT8 displayed enhanced antioxidant and antibacterial performance. Finally, BF-CT8 extended the shelf life of refrigerated pork from 3 days to 6 days compared to BF-CT0 and unwrapped pork. In conclusion, the bilayer film shows great potential for use in pork preservation.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Lianxia Jing,Pengyu Zhang,Yanming Chen,Yunling Gao,Junxian Yun
A superhydrophobic PDMS/DTMS-SiO 2 @PLA membrane with a porous layered three-dimensional rough structure was obtained by a simple phase separation method for the preparation of polylactic acid (PLA) membrane with the addition of a layer of functionalized DTMS-SiO 2 nanoparticles. SEM, EDS, XPS, TGA, and FTIR were used to characterize the surface morphology and chemical composition of the PDMS/DTMS-SiO 2 @PLA membrane. The static water contact angle of the modified membrane could reach 160.7°. The high hydrophobicity remained after 50 abrasion experiments, and the WCA was still greater than 150° after 4 hours of immersion in different pH solutions. For petroleum ether, n-hexane, n-heptane, and isooctane mixtures with water, the modified membrane exhibited excellent oil-water separation capabilities in separation flux and efficiency. Meanwhile, the modified membrane also has good resistance to contamination and self-cleaning ability. Due to the advantages of simple preparation, degradable materials, mechanical stability, chemical resistance, excellent oil-water separation capability, good anti-pollution, and self-cleaning ability, superhydrophobic PDMS/DTMS-SiO 2 @PLA membrane can be applied to practical oil-water separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Biomedical Materials
·
2024
·
IF 3.9
Jun Xu,Xingyu Zhao,Zhenzhen Lei,Huimin Jia,Haolong He,Genghao Gong,Jing Wang,Tiegang Wang
Medical antibacterial textiles play a vital role in tackling the issue of bacterial infection. Traditional surgical sutures face significant challenges due to wound infection caused by bacteria and breakage and scars caused by poor suture strength. Therefore, a new antibacterial and high-strength suture preparation strategy with wide clinical applicability was highly desired. In this study, a biodegradable quaternary ammonium salt (QAS)/polylactic acid (PLA) core-spun yarn with excellent antibacterial and mechanical properties was prepared by conjugated electrospinning technology combined with the braiding process. The antibacterial test results revealed the best overall performance of the PLA micro/nanofiber core-spun yarn with 0.3 wt% QAS antibacterial agent. The antibacterial rate against Escherichia coli and Staphylococcus aureus was 94.49% and 94.00%, respectively, which could effectively solve the problem of wound infection caused by bacteria. In addition, we used the diamond-braided structure to address the poor strength and fragility of the traditional suture strength. The braiding angle of 30° and 45° could effectively enhance the mechanical properties of the yarn, and the breaking strength was also in line with the industry standard. The study proposed that the degradable QAS/PLA micro/nanofiber core-spun yarn, due to its excellent antibacterial and mechanical properties, could find application in medical protection. This provided a new avenue for research into new antibacterial surgical sutures.
研究领域:
生物医学工程
·
纺织科学与技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）