JOURNAL OF POLYMER SCIENCE
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2025
·Vol. 63
·期 8
·1924-1937
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IF 3.6
Xueting Xuan,Haowei Zhang,Xing Xu,Zhouyi Pan,Yonghao Luo,Yi Li,Li Sun
Polyacrylamide (PAM) hydrogels have shown great potential in applications such as tissue engineering, biosensing, and soft robotics due to their biocompatibility, low cost, and tunable properties. However, limited by the low viscosity and the relatively short chemical cross-linking time of the PAM precursor, direct 3D printing of PAM gel with desired mechanical properties remains challenging. This study addresses these challenges by incorporating Laponite nanoclay as a rheological/gelling regulator and nanofiller, alongside N, N′-methylenebisacrylamide (MBA) to accelerate curing. A combination of using Laponite nanoclay and MBA not only alters the viscoelastic characteristics of the precursor and the gelling time but also introduces a significant shear-thinning effect. The formulated PAM-Laponite mixture can be optimized to be adopted by conventional extrusion-based 3D printing to synthesize gel structures with good shape fidelity. The study also shows that the combination of nanoclay physical gelling, PAM chemical cross-linking, and the competitive molecular interactions among different gel compositions allows significant improvement and tunability in the mechanical performances of the resultant gel samples. Hereby, the work demonstrates an efficient and practical approach to tuning the rheological properties of the extrusion precursor for prototyping 3D gel structures suitable for biomedical applications. Graphical
研究领域:
生物材料
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组织工程
·
软体机器人
·
生物医学工程
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产品关联
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Yanping Huang,Nianhua Dan,Weihua Dan,Weifeng Zhao
A novel clay-reinforced polycaprolactone/chitosan/curcumin (PCl/CS/Clay/Cur) composite film was fabricated in this study. The prepared Cur-loading composite films were characterized with attenuated total reflection Fourier transformed infrared spectroscopy, scanning electron microscopy, atomic force microscopy, water contact angle, differential scanning calorimetry, thermogravimetric analysis, and X-ray diffraction, and the results showed good dispersion of clay in the composite films. The addition of nanoclay was found to significantly increase the tensile strength. Also, the clay-enhanced drug-loading films exhibited better controlled-release profiles of Cur than those membranes without clay. Skin disinfection test demonstrated that the curcumin-loaded film could protect wound from bacterial infection. Cytotoxicity analysis proved the good biocompatibility of the composite films. The clay-enhanced Cur-loading films might be promising candidates for wound care.
研究领域:
生物材料
·
药物递送
·
组织工程
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 16
·3357
·
IF 5
Jiamei Zhang,Xia Huang,Jiachang Chen,Sheng Zhou,Junying Chen
Protective coatings for bronze relics should adhere to the basic principles of cultural relic preservation, such as not altering the color and appearance of the artifacts, and being moderately combined with the artifacts to resist erosion due to external environments (such as water and gas). This paper presents the development of a physically crosslinked supramolecular hydrogel produced from guanidinium-based chitosan (GC). The hydrogel exhibits the excellent adsorption protection of bronze, and the addition of clay enhances the water barrier properties of the chitosan film. The supramolecular interaction between sodium polyacrylate/GC/clay confers corrosion buffering capability to the hydrogel coating in corrosive environments, and the gel coating can be self-healing at room temperature for 24 h. The fabricated nanocomposites were comprehensively characterized using various methods (Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, X-ray photoelectron spectroscopy, scanning electron microscopy, etc.). The electrochemical properties of coated specimens were evaluated, and the impedance spectrum revealed a large impedance arc indicating high charge resistance, which has a corrosion resistance effect.Keywords:nanoclay;anticorrosion;gel coating;self-healing;buffer capacity
研究领域:
材料科学
·
文物保护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Chen Yao,Zhuang Liu,Chao Yang,Wei Wang,Xiao-Jie Ju,Rui Xie,Liang-Yin Chu
A novel and facile assembly strategy has been successfully developed to construct smart nanocomposite (NC) hydrogels with inhomogeneous structures using nanoclay-cross-linked stimuli-responsive hydrogel subunits as building blocks via rearranged hydrogen bonding between polymers and clay nanosheets. The assembled thermoresponsive poly(N-isopropylacrylamide-co-acrylamide) (poly(NIPAM-co-AM)) hydrogels with various inhomogeneous structures exhibit excellent mechanical properties due to plenty of new hydrogen bonding interactions created at the interface for locking the NC hydrogel subunits, which are strong enough to tolerate external forces such as high levels of elongations and multicycles of swelling/deswelling operations. The proposed approach is featured with flexibility and designability to build assembled hydrogels with diverse architectures for achieving various responsive deformations, which are highly promising for stimuli-responsive manipulation such as actuation, encapsulation, and cargo transportation. Our assembly strategy creates new opportunities for further developing mechanically strong hydrogel systems with complex architectures that composed of diverse internal structures, multistimuli-responsive properties, and controllable shape deformation behaviors in the soft robots and actuators fields.
研究领域:
材料科学
·
生物工程
✓ 已验证
DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Shenghe Zhang,Zhimin Song,Bibo Wang,Richard K.K. Yuen,Yuan Hu
In this study, an organic macromolecular flame-retardant quaternary ammonium salt (OCA-HP-LA) was synthesized through molecular design and its structure was characterized. Subsequently, it was mixed with nano clay (DK4) and poly (butylene adipate terephthalate) (PBAT) by melt blending to prepare PBAT/DK4/OCA-HP-LA nanocomposite. The tensile strength (TS) and elongation at break (EB) of the sample PBAT/DK4/OCA-HP-LA 5wt% were 23.3MPa and 1362%, respectively, which were higher than the pure sample. This indicates that the addition of OCA-HP-LA enabled complete delamination of the DK4 flakes, achieving true nanocomposite., which can be confirmed by transmission electron microscopy results. The PHRR of the modified samples was significantly reduced, notably, the SPR and TSP of the sample PBAT/DK4/OCA-HP-LA 5wt% were 0.127m 2 /s and 7.86m 2 , which were 40.4% and 47.1% lower than those of the pure PBAT. Therefore, OCA-HP-LA achieves a multi-dimensional improvement in the mechanical and fire safety properties of PBAT.
研究领域:
材料科学
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高分子化学
·
燃烧学
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产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 11
·1528
·
IF 4.7
Ji Xu,Lingxiao Jia,Qixin Lan,Daheng Wu
The green and environmentally friendly cardanol epoxy resin has a bright application prospect, but its insufficient thermal/mechanical properties seriously hinder its application. Adding nanoclay to polymer matrix is an effective method to enhance the thermal/mechanical properties of material, but the dispersion and compatibility of nanoclay in epoxy resin remain to be solved. In this work, active Girard’s reagent clay (PG-clay) and non-active Girard’s reagent clay (NG-clay) were prepared by using acethydrazide trimethylammonium chloride (Girard’s reagent) as the modifier, and cardanol epoxy resin/G-clay nanocomposites were synthesized by the “clay slurry composite method”. The results showed that both PG-clay and NG-clay were dispersed in the epoxy matrix in the form of random exfoliation/intercalation, which effectively improved the thermal/mechanical properties of the composites. Tg of the cardanol epoxy resin has raised from 19.8 °C to 38.1 °C (4 wt.% PG-clay). When the mass fraction of clay is 4%, the tensile strength of the non-reactive NG-clay increases by 128%, and the elongation at break also increases by 101%. Simultaneously, the active PG-clay can participate in the curing reaction of epoxy resin due to the amino group, forming a chemical bond between the clay layer and the resin matrix and establishing a strong interfacial force. The tensile strength of the composite is increased by 970%, and the elongation at break is also increased by 428%. This research demonstrates that the cardanol epoxy resin/G-clay nanocomposite stands as a highly promising candidate for bio-based epoxy resin materials.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2015
·Vol. 72
·期 11
·3007-3030
·
IF 1.438
Islam Muhammad Remanul,Beg Mohammad Dalour Hossen,Jamari Saidatul Shima Binti
Five different types of acid anhydrides such as succinic anhydride (SA), maleic anhydride (MA), phthalic anhydride (PA), 3,4,5,6-tetrahydrophthalic anhydride (TPA) and cis -1,2-cyclohexanedicarboxylic anhydride (CDA) were used to prepare various polyalkyd resins from palm oil by following alcoholysis and esterification reaction. Palm oil was subjected to dehydration process using concentrated sulphuric acid prior to alcoholysis to improve the unsaturation in the fatty acid chains. Various physicochemical properties of the resins such as acid value, iodine value, yield, density, specific gravity, molecular weight, non-volatile material content, drying time, colour, solubility, etc., were tested by using standard methods. The resins were cured by using methyl ethyl ketone peroxide (MEKP), styrene and cobalt naphthenate at 120 °C. To enhance the thermal, structural and other resinous properties, 0.5 wt% of montmorillonite nanoclays (MNCs) was dispersed in TPA-based resin. The cured films were tested for X-ray diffraction, surface morphology, tensile properties, pencil hardness, gloss, gel content, swelling ratio, adhesion, thermogravimetric analysis, and chemical resistivity. In addition, hydrophobicity of the cured films was observed by contact angle measurement. A comparison was drawn among the resins as well as the films prepared from different acid anhydrides. Analysis revealed that TPA-based resin/film shows improved characteristics among the others due to high degree of crosslinking. On the other hand, incorporation of MNCs into the polyalkyds led to higher thermal properties, acceptable pencil hardness and reduced wettability, which may suit this film to be applied for high-performance surface coating applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-11
·
IF 14.919
Cui Yan,Huang Zongwang,Lei Li,Li Qinglin,Jiang Jinlong,Zeng Qinghai,Tang Aidong,Yang Huaming,Zhang Yi
Death from acute hemorrhage is a major problem in military conflicts, traffic accidents, and surgical procedures, et al. Achieving rapid effective hemostasis for pre-hospital care is essential to save lives in massive bleeding. An ideal hemostasis material should have those features such as safe, efficient, convenient, economical, which remains challenging and most of them cannot be achieved at the same time. In this work, we report a rapid effective nanoclay-based hemostatic membranes with nanoclay particles incorporate into polyvinylpyrrolidone (PVP) electrospun fibers. The nanoclay electrospun membrane (NEM) with 60 wt% kaolinite (KEM1.5) shows better and faster hemostatic performance in vitro and in vivo with good biocompatibility compared with most other NEMs and clay-based hemostats, benefiting from its enriched hemostatic functional sites, robust fluffy framework, and hydrophilic surface. The robust hemostatic bandages based on nanoclay electrospun membrane is an effective candidate hemostat in practical application.
研究领域:
医学
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材料科学
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生物工程
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2024
·
IF 3.2
Ying Gou,Yuejiang Xie,Shukun Shen,Huiping Xing,Pujun Jin,Hua Li,Xiaolian Chao,Daodao Hu
Constructing inorganic adhesive to bond the broken fragments that for that meet the requirements of restoration of cultural relics is still challenging. In response to this problem, a new design of nano-clay/aluminum phosphate adhesive and the preparation of corresponding material were proposed. An orthogonal experiment L25 (53）was conducted to optimize the ratio of the adhesives. The composite adhesive was characterized and the bonding efficiencies of mimicking terracotta figurine were evaluated. Based on the above experiments, the composite adhesive with attractive mechanical properties is mainly based on the Si – O –P, Al– O –P covalent bond and hydrogen bond interactions between nano-clay surface and aluminum phosphate. The proposed inorganic adhesive has advantages in similarity with the raw materials of the restored cultural relics, easy control of bonding course, durability, and environmental friendliness, which represents a potential utility of this adhesive in the restoration of earthenware relics.
研究领域:
文物保护
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Menghan Yu,Li Feng,Zongle Gan,Yicheng Hua,Haiyan Wu,Bernhard Ganss,Huaming Yang
Achieving superior mechanical properties of composite materials in artificially engineered materials is a great challenge due to technical bottlenecks in the size and morphological modulation of inorganic nanominerals. Hence, a “bioprocess-inspired fabrication” is proposed to create multilayered organic–inorganic columnar structures. The sequential assembly of halloysite nanotubes (HNTs), polyelectrolytes (PAAs), and calcium phosphates (CaPs) results in organic–inorganic structures. PAA plays a crucial role in controlling the formation of CaP, guiding it into amorphous particles with smaller nanosizes. The introduction of HNT induces the assembly and maturation of CaP–PAA, leading to the formation of a highly crystalline hydroxyapatite. Poly(vinyl alcohol) was then woven into HNT-encapsulated hydroxyapatite nanorods, resulting in composite materials with basic hierarchical structures across multiple scales. The fabricated composite exhibits exceptional hardness (4.27 ± 0.33 GPa) and flexural strength (101.25 ± 1.72 MPa), surpassing those of most previously developed biological hard tissue materials. Additionally, the composite demonstrates effective antibacterial properties and corrosion resistance, attributed to the dense crystalline phase of CaP. This innovative approach showcases the potential of clay minerals, particularly HNT, in the advancement of biomaterial design. The outstanding mechanical and antimicrobial properties of clay-based composites make them a promising candidate for applications in hard tissue repair, offering versatility in biomedicine and engineering.
研究领域:
生物材料学
·
组织工程学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Bio Materials
·
2022
·
IF 0
Jiabo Shi,Ruizhen Zhang,Jiajing Zhou,Wonjun Yim,Jesse V. Jokerst,Yi Zhang,Bradley W. Mansel,Na Yang,Yuxuan Zhang,Jianzhong Ma
Functional bionanocomposites have evoked immense research interests in many fields including biomedicine, food packaging, and environmental applications. Supramolecular self-assembled bionanocomposite materials fabricated by biopolymers and two-dimensional (2D) nanomaterials have particularly emerged as a compelling material due to their biodegradable nature, hierarchical structures, and designable multifunctions. However, construction of these materials with tunable properties has been still challenging. Here, we report a self-assembled, flexible, and antioxidative collagen nanocomposite film (CNF) via regulating supramolecular interactions of type I collagen and tannic acid (TA)-functionalized 2D synthetic clay nanoplatelets Laponite (LAP). Specifically, TA-coordinated LAP (LAP-TA) complexes were obtained via chelation and hydrogen bonding between TA and LAP clay nanoplatelets and further used to stabilize the triple-helical confirmation and fibrillar structure of the collagen via hydrogen bonding and electrostatic interactions, forming a hierarchical microstructure. The obtained transparent CNF not only exhibited the reinforced thermal stability, enzymatic resistance, tensile strength, and hydrophobicity but also good water vapor permeability and antioxidation. For example, the tensile strength was improved by over 2000%, and the antioxidant property was improved by 71%. Together with the simple fabrication process, we envision that the resulting CNF provides greater opportunities for versatile bionanocomposites design and fabrication serving as a promising candidate for emerging applications, especially food packaging and smart wearable devices.
研究领域:
生物材料学
·
食品科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Mei Long,Xiaohui Yang,Tao Shi,Yinye Yang
Developing an effective and user-friendly hemostatic agent is highly desired in the treatment of hemorrhage. Inspired by the natural nanostructure and abundant hydroxyl groups of cellulose and clay minerals, we designed an aerogel (HNTs/TOCNs) composed of halloysite nanotubes (HNTs) and TEMPO-oxidized cellulose nanofibers (TOCNs) with a hierarchical porous structure for the treatment of bleeding, using a simple and environmentally friendly self-assembly method. TOCNs formed a three-dimensional porous scaffold with excellent water-holding capacity. The incorporation of HNTs enhanced the hemostatic efficiency and mechanical properties of the 3D framework. The large interlayer spaces and wide channels within the HNTs/TOCNs aerogel provided rapid passage for blood, facilitating blood concentration and offering ample room for interactions between the HNTs/TOCNs aerogel and platelets, erythrocytes, and coagulation factors, thereby promoting hemostasis. Benefiting from the natural hemostatic properties and well-designed structure, the HNTs/TOCNs aerogel displayed excellent hemostatic performance both in vitro and in vivo . Notably, the hemostatic time of HNTs/TOCNs-2 was only 74 ± 8 s, which is approximately 50 % shorter than the blank control (151 ± 20 s) in liver femoral artery injury model. This design of an HNTs/TOCNs aerogel presents a unique opportunity to enhance hemostatic efficacy by synergizing the advantages of natural materials.
研究领域:
生物医学工程
·
材料科学
·
止血材料研究
✓ 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）