APPLIED COMPOSITE MATERIALS
·
2021
·Vol. 29
·期 2
·729-743
·
IF 2.181
Huo Yanqiu,Ge Huan,Lin Changhong,Ying Puyou,Huang Min,Zhang Ping,Yang Tao,Liu Gang,Wu Jianbo,Levchenko Vladimir
The development of polymer-based composites with self-healing and recyclable capability has attracted the attention of several researchers for resource recycling and environment protection. In this work, Halloysite nanotubes (HNTs) reinforced polyurethane materials (PU) with self-healing and recyclable ability were constructed by in situ polymerization method. The mechanical, thermal amd morphological properties of PU and related composites were studied. The morphology of samples fracture surface ensured the homogeneous dispersion of HNTs in the polymer matrix. Moreover, thermal stability was improved with the incorporation of the HNTs. The tensile test showed strength increased with HNTs content increased. The tensile strength of composites increases from 23.38 to 34.92 MPa at 2 wt% HNTs. Therefore, the designed strategy provides a simple approach for preparing high mechanical properties, reprocessing and self-healing ability polyurethane composites.
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
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 29
·期 5
·1625-1636
·
IF 1.637
Zhang Rui,Zhu Xuyang,Liu Yi,Cai Youfeng,Han Qiong,Zhang Tongqing,Li Yu
In this work, the versatile filler (HNTs) consisted of a halloysite nanotube as skeleton and intermediate magnetic nanoparticles coating poly(dopamine + 3-aminopropyltriethoxysilane) derivate layer were prepared. PVDF membranes were then manufactured by incorporating a series of ratios of HNTs. The Fourier-transform infrared (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and transmission electron microscope (TEM) results proved that the modified materials were successfully achieved. The morphologies of membranes were characterized by scanning electron microscope (SEM) and atom force microscope (AFM). Meanwhile the PVDF hybrid membranes exhibited a stronger hydrophilicity (contact angle is 53°), higher bovine serum albumin (BSA) rejection (99%) than pure membrane (87°and 54%), and hybrid membranes maintain a higher flux recovery rate (FRR) that attains 85.3% after two cycles. Besides, the composite membrane showed a good removal rate (97.2%) of methylene blue. According to above experimental parameters, the 6% (based on PVDF mass) HNTs composite membrane was defined as the experimental optimal selection, and it could provide a promising candidate for methylene blue solution separation.
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Yuan Qin,Mingxia Wu,Yongfeng Yang,Yi Yang,Gang Yang
To improve the antiwear properties of halloysite nanotubes as an oil-based additive, the effect of thermal activation on the tribological properties of halloysite was investigated. The results showed that the anti-wear properties of the halloysite and calcined products are improved by 34.54% and 45.45 –54.76%, respectively, compared with the base oil. The outstanding wear resistance of the surface lubricated by the calcined product is attributed to the faster and easier formation of a multilayer nanocrystalline tribofilm, which mainly contains the nanocrystalline transition layer, the oxide film (composed of nanoscale iron oxide , Al 2 O 3 , SiO x ) and the amorphous carbon film . The findings here provide new insights into optimizing the tribological properties of phyllosilicate and enrich the tribological mechanism of halloysites.
研究领域:
材料科学
·
摩擦学
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Qiang Zhang,Yi Zhang,Sainan Liu,Huaming Yang
Halloysite nanotubes were investigated as a hard template for the preparation of multi-functional porous carbon due to their one-dimensional ordered structures and the composition of aluminosilicate . Herein, a novel N-doped three-dimensional porous carbon nanofiber (3D PCN) was obtained following electrospinning, pyrolysis and demineralization of natural halloysite. When used as anodes in Na + -batteries, the obtained 3D PCN exhibited a high specific capacity of 266 mAh·g −1 at a current density of 100 mA·g −1 and super cycling stability with a capacity retention of 91.1% after 5000 cycles at 1 A·g −1 . This work can not only extend the application of halloysite in energy storage but also provide a low-cost and promising three-dimensional porous carbon material for advanced Na + batteries .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Zengli Wang,Yaheng Pang,Hongxia Guo,Huan Wang,Li Liu,Xiao Wang,Sheng Zhang,Wenquan Cui
The development of highly efficient and low cost CO 2 adsorbent becomes increasingly significant in order to achieve the goal of carbon neutrality. Herein we prepared a new type of 3-aminopropyltriethoxysilane (AP) and polyethyleneimine (PEI) amino-bifunctionalized adsorbent by grafting AP onto the acid thermally activated Halloysite nanotubes (HNTS) through the use of Si-OH. The results showed that the adsorption capacity of the CO 2 adsorbent (5-700-HNTS-20AP-40PEI) was 1.03 mmol/g at 50 °C and further increased to 1.51 mmol/g at 80 °C. The hydrogen bonding and dipole interactions between the amino groups in PEI and the hydroxyl and amino groups in AP promote the dispersion of PEI into pore channels of the carrier, thus reducing the aggregation and blockage. Moreover, the amino-bifunctionalized adsorbent exhibited satisfactory cyclic regenerability over 20 cycles. The analysis of adsorption kinetics and internal diffusion indicates that untreated HNTS is predominantly dominated by physisorption , whereas amino-modified solid adsorbents exhibit both physisorption and chemisorption with adsorption mainly occurring on the carrier surface.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Nano Research
·
2023
·
IF 9.9
Sun Yaru,Yu Bin,Liu Yan,Yan Junbo,Xu Zixi,Cheng Bo,Huang Fenglei,Wang Jun
High-performance flame-retardant polylactic acid (PLA) bio-composites based on biobased fillers to meet usage requirements represents a promising direction for creating a sustainable world. Although flame retardant PLA composites have been reported extensively, it still remains a huge challenge to develop mechanically robust. The flame retardant PLA composites due to plastication effect of organic flame retardants and poor compatibility of organic fillers with the matrix lead to the severe deterioration in mechanical properties. In this work, a bio-inspired surface manipulation strategy for halloysite nanotubes (HNTs) was proposed via a facile and green self-assembly process. The structure and morphology of bio-inspired HNTs (b-HNTs) proved that biomass nanofillers (PA-NA-Fe) grew well both within the lumen and on the surface of HNTs. The growth of biomass on the inner and outer surfaces of HNTs was inspired from wooden towards enhancing the interface compatibility and imparting multi-properties to PLA biopolymer. Excellent mechanical properties (tensile, thermomechanical and anti-impact mechanical), great fire safety (heat release and smoke emission), thermostability and improved electromagnetic interference shielding effectiveness of this well-designed PLA nanocomposite were realized. The mechanisms of the enhanced performances of the PLA bio-composites by loading b-HNTs were proposed. This work presents a facile and environmentally-friendly bio-inspired modification strategy for HNTs to fabricate high-performance, multi-functional polymer composites, which is also suitable for surface modification of many other nanomaterials, including nanofibers, nanotubes, nanowires, and nanosheets.
研究领域:
材料科学
·
生物工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xi Yu,Lu He,Xiaofeng Zhang,Gege Bao,Rong Zhang,Xiaobei Jin,Daochun Qin
Bamboo fibers (BF), as an important sustainable natural material, are becoming a hot alternative to synthetic fibers for the reinforcement of polypropylene (PP)-based composites. However, the weak interfacial compatibility between BF and PP as matrix and their inherent flammability limit the practical application of BF/PP composites (BPC). Here, a fire-safe BPC was fabricated by constructing flame-retardant interfacial layers containing tannic acid (TA)-Fe 3+ complex and halloysite nanotubes (HNTs) on the fiber matrix followed by a hot-pressing process. The results showed that the interfacial chelating of TA with Fe 3+ improved the dispersion of HNTs on the fibers and the interfacial interactions within the fiber matrix, resulting in the as-fabricated composite with significantly improved mechanical properties and water resistance. In addition, the flame-retardant composite exhibited higher thermal stability and enhanced residual char content. Moreover, the composite possessed significant flame-retardant performances with a reduction of 23.75 % in the total heat release and 32.44 % in the total smoke production, respectively, owing to the flame retarding in gaseous phase and condensed phase of TA-Fe 3+ @HNTs layers. This work offers a green and eco-friendly strategy to address the inherent problems of BPC material in terms of fire safety and interfacial compatibility, thus broadening their applications in the automotive interior and construction industries.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Xuteng Xing,Dan Zhou,Erjun Tang,Shaojie Liu,Xiaomeng Chu,Xiaodong Xu,Yongquan Xu
The natural halloysite nanotubes were used as the nanocontainer to load Na 2 MoO 4 corrosion inhibitor , and the release rate of Na 2 MoO 4 was further controlled by wrapped with the CaMoO 4 end stopper through adding with Ca 2+ . The variable release rates were fulfilled by the formation of CaMoO 4 end stopper with different strength, and the release time can be adjusted from one to dozens of hours. Moreover, the prepared complex corrosion inhibitor is also an acid-responsive smart material, which can quickly release the large amount of corrosion inhibitors under acidic conditions through the decomposition of insoluble CaMoO 4 complex on the surface or end of halloysite. In addition, the epoxy coating mixed with 10 wt% Ca 2+ treated Na 2 MoO 4 loaded halloysite can provide the highest corrosion resistance and sustained release of the corrosion inhibitor to achieve corrosion healing in the coating defects.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Mingxian Liu,Rui He,Jing Yang,Wei Zhao,Changren Zhou
Here, we used capillary tubes to evaporate an aqueous dispersion of halloysite nanotubes (HNTs) in a controlled manner to prepare a patterned surface with ordered alignment of the nanotubes . Sodium polystyrenesulfonate (PSS) was added to improve the surface charges of the tubes. An increased negative charge of HNTs is realized by PSS coating (from −26.1 mV to −52.2 mV). When the HNTs aqueous dispersion concentration is higher than 10%, liquid crystal phenomenon of the dispersion is found. A typical shear flow behavior and decreased viscosity upon shear is found when HNTs dispersions with concentrations higher than 10%. Upon drying the HNTs aqueous dispersion in capillary tubes, a regular pattern is formed in the wall of the tube. The width and spacing of the bands increase with HNTs dispersion concentration and decrease with the drying temperature for a given initial concentration. Morphology results show that an ordered alignment of HNTs is found especially for the sample of 10%. The patterned surface can be used as a model for preparing PDMS molding with regular micro-/nanostructure. Also, the HNTs rough surfaces can provide much higher tumor cell capture efficiency compared to blank glass surfaces. The HNTs ordered surfaces provide promising application for biomedical areas such as biosensors.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Saeed Rehman,Jiayan Wu,Muddasir Hanif,Tianming Wang,Minye Huang,Tang Hongmei,Shang Zhongbo,Pingxiao Wu,Fazal Raziq
This research is focused on studying the effects of different dissolved organic matter (DOM) and electrolyte concentration on the Cd(II) adsorption on halloysite (HNT) surfaces. The DOM significantly decreased the Cd(II) adsorption by more than 25 %. Soil derived dissolved organic matter (SDT) showed the greatest negative impact, followed by humic acid (HA) and Fulvic acid (FA). The effects of background electrolytes NaCl and NH 4 Cl showed that both salts can undergo complexation with metals. Furthermore, the DOM (SDT/FA/HA) can cover the major HNT surface and the Cd(II) adsorption may occur due to outer-sphere complexation and ion exchange. Additionally, the influence of 100 mML −1 of NaCl on the aggregation tendencies of HNT has demonstrated that the presence of DOM amplifies the aggregation behavior of these nanotubes . The interaction energy barrier between HNT particles is dependent on physicochemical characteristics of DOM that inhibits Cd(II) sorption . These findings suggested that the HNT reduction, electrostatic repulsion and site-competition are the prominent mechanisms to decrease the Cd(II) immobilization on the HNT. The extent of Cd(II) adsorption/desorption on HNT surface followed the order of FA > HA > SDT/ HA > SDT > FA.
研究领域:
环境科学
·
土壤学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 83
·44197-44202
·
IF 3.708
Huilin Lun,Jing Ouyang,Huaming Yang
Natural halloysite nanotubes (HNTs) modified with 3-aminopropyltriethoxysilane were used as an aspirin carrier. The structure, drug loading and release profiles of samples were characterized by X-ray diffraction (XRD), thermogravimetry-differential scanning calorimetry (TG-DSC), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and UV-spectrophotometry. The Higuchi model Q = kt0.5 was employed to analyze the dissolution data in detail. The results indicated that the modification of HNTs could improve the amount of aspirin from 3.84 to 11.98 wt%. The physical state of aspirin was nanocrystalline and amorphous affected by the confined space of HNTs, which significantly enhanced the dissolution rate created by a burst release within the first hour. The linearity of the Higuchi equation indicated that the aspirin release mechanism for modified HNTs was fitted to Fick's diffusion and the dissolution rate was slower than that of natural HNTs. The as-synthesized N-HNTs could have interesting potential application in drug carrier systems.
研究领域:
药剂学
·
纳米医学
·
生物材料
·
药物递送系统
·
药动学
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Zheru Long,Jun Zhang,Yan Shen,Changren Zhou,Mingxian Liu
Inorganic nanoparticles have attracted much attentions in gene delivery because of their desirable characteristics including low toxicity, well-controlled characteristics, high gene delivery efficiency, and multi-functionalities. Here, natural occurred halloysite nanotubes (HNTs) were developed as a novel non-viral gene vector. To increase the efficiency of endocytosis, HNTs were firstly shortened into an appropriate size (~ 200 nm). Then polyethyleneimine (PEI) was grafted onto HNTs to bind green fluorescence protein (GFP) labeled pDNA. The structure and physical-chemical properties of PEI grafted HNTs (PEI-g-HNTs) were characterized by various methods. PEI-g-HNTs show lower cytotoxicity than PEI. PEI-g-HNTs are positively charged and can bind DNA tightly at designed N/P ratio from 5:1 to 40:1. PEI-g-HNTs/pDNA complexes show much higher transfection efficiency towards both 293T and HeLa cells compared with PEI/pDNA complexes at the equivalent N/P ratio. The transfection efficiencies of PEI-g-HNTs/pDNA complex towards HeLa cell can reach to 44.4% at N/P ratio of 20. PEI-g-HNTs/pDNA complexes possess a higher GFP protein expression than PEI/pDNA from simple western immunoblots. So, PEI-g-HNTs are potential gene vectors with good biocompatibility and high transfection efficiency, which have promising applications in cancer gene therapy.
研究领域:
生物医学工程
·
分子生物学
·
纳米医学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）