MOLECULES
·
2024
·Vol. 29
·期 12
·2822
·
IF 4.2
Jian Xiao,Tingting Liu,Qiulu Chu,Chaoguang Yu,Yunlong Yin,Lei Xuan,Shufang Wu
Carboxymethyl cellulose (CMC) and polylactic acid (PLA) are recognized for their environmental friendliness. By merging them into a composite film, packaging solutions can be designed with good performance. Nonetheless, the inherent interface disparity between CMC and PLA poses a challenge, and there may be layer separation issues. This study introduces a straightforward approach to mitigate this challenge by incorporating tannin acid and ferric chloride in the fabrication of the CMC−PLA. The interlayer compatibility was improved by the in situ formation of a cohesive interface. The resulting CMC/TA−PLA/Fe multilayer film, devoid of any layer separation, exhibits exceptional mechanical strength, with a tensile strength exceeding 70 MPa, a high contact angle of 105°, and superior thermal stability. Furthermore, the CMC/TA−PLA/Fe film demonstrates remarkable efficacy in blocking ultraviolet light, effectively minimizing the discoloration of various wood surfaces exposed to UV aging.
研究领域:
材料科学
·
环境科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2011
·
IF 2.13
Zhangliang Gui,Jinwen Qian,Qiang Zhao,Yanli Ji,Yanxing Liu,Tao Liu,Quanfu An
A layer-by-layer (LbL) self-assembly technique was used to construct temperature-responsive multilayer films of polybetaine poly-3-dimethyl(methacryloyloxyethyl) ammonium propane sulfonate (PDMAPS) and poly(acrylic acid) (PAA). The assembly and disintegration behaviors of PDMAPS/PAA multilayer films were investigated by quartz crystal microbalance (QCM) and atomic force microscopy (AFM). The results indicated that the assembly behaviors of PDMAPS/PAA multilayer films could be well regulated by the pH and temperature of dipping solutions. The disintegration of PDMAPS/PAA multilayer films could be well controlled by varying the disintegration temperature ( T d ) and the pH of buffer solution. The critical disintegration temperature ( T cd ) decreased with increasing pH of buffer solution used. The ionization of carboxylic acid groups (COOH) of PAA and the breakage of intra-chain associations of PDMAPS in multilayer films are two main reasons for the film disintegration. Based on the controllable disintegration of the PDMAPS/PAA multilayer, free-standing multilayer films were successfully prepared by LbL self-assembly of poly(4-vinylpyridiniomethanecarboxylate) (PVPMC) and PAA using PDMAPS/PAA as a sacrificial sublayer.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2010
·
IF 4.539
Zhizhang Guo,Xingyu Chen,Jianyu Xin,Duo Wu,Jianshu Li,Chenlong Xu
The influence of molecular weight and arm number of star polymers on the buildup and pH-dependent morphology changes of multilayer films assembled from star poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) and linear poly(styrenesulfonate) (PSS) was systematically investigated. Well-defined star PDMAEMA, consisting of β-cyclodextrin (CD) core and different arm number (21, 14, and 7) were successfully synthesized via atom transfer radical polymerization (ATRP). It is found that star polymers with certain arm number deposit more mass with the increase of molecular weight. As for the star polymers with almost the same arm length but different arm number, film assembled from 14-arm star PDMAEMA exhibits the fastest growth and the most significant morphology changes upon the pH 2.75 treatment. It is assumed that the interdiffusion of PSS controlled by star PDMAEMA with different structures should be responsible for the different buildup and pH-dependent morphology changes of the multilayer films.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
POLYMER INTERNATIONAL
·
2021
·Vol. 70
·期 9
·1396-1403
·
IF 2.99
Tingxiao Li,Yifan Huang,Lei Wang,Binjie Xin
A bead-on-string structure with special beads at the microscale level could act as an effective carrier for solid drug particles as well as giving a continuous and sustained release profile. Tetracycline hydrochloride (TCH), used as solid model drug particles, was ground to obtain nanoscale and well-distributed size. Electrospun poly[lactic- co -(glycolic acid)] (PLGA) bead-on-string nanofibers loaded with TCH of different particle sizes were fabricated for controlled drug delivery. The morphology of TCH particles and bead-on-string nanofibers were observed using a particle sizer and scanning electron microscopy. The effects of drug particle size on the release behaviors of nanofibers were further investigated and analyzed using UV–visible spectrophotometry. In vitro release results suggested that bead-on-string nanofibers encapsulating ground TCH particles had higher total drug release quantity compared with unground particle-loaded nanofibers. Coating of the surface of PLGA/TCH nanofibers was investigated for controlled-release effects and the release mechanism to understand the drug–polymer carrier interaction. The results indicated that coating on both sides of nanofibrous membranes could effectively decrease the initial burst release. Bead-on-string nanofibers proved to be promising mats for drug delivery applications. © 2021 Society of Industrial Chemistry.
研究领域:
生物材料学
·
药剂学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Fanqin Ji,Lina You,Lei Wang,Zhikai Liu,Yajun Zhang,Shanshan Lv
A “post-infiltration and subsequent photo-cross-linking layer-by-layer assembly” strategy was, for the first time, introduced to fabricate carboxylated chitosan (CCS) based antibacterial multilayer films with improved stability under alkaline conditions. Precursory polyelectrolyte multilayers were assembled from CCS and poly(allylamine hydrochloride) (PAH). 4,4′-Diazostilbene-2,2′-disulfonic acid disodium salt was then infiltrated to cross-link the multilayers under UV irradiation. Analysis by UV–vis spectra showed that absorbance at characteristic wavelengths of the multilayers increased almost linearly with number of CCS/PAH bilayers. AFM images indicated that surfaces of the cross-linked multilayers were rather uniform and stable against basic treatments. Surface wettability of the multilayers was determined by water contact angle measurements. The multilayers exhibited reasonable antibacterial properties against Gram-negative E. coli, demonstrating that the multilayers were active in preventing bacterial growth and represented a novel type of antibacterial films with improved stability under alkaline conditions. These results open new possibilities for building functionalized architectures onto polyelectrolyte multilayer films.
研究领域:
生物材料学
·
表面科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2016
·Vol. 163
·期 13
·H1104
·
IF 3.014
Huiqin Yao,Xiayue Luo,Tiangang Yang,Menglu Li,Baohua Yang,Yanli Lu,Hongyun Liu
Triple-responsive films with binary architecture for switchable biosensors were designed on electrodes through the combination of the weak polyelectrolyte {PAH/PAA}n (PAH = poly(allylamine hydrochloride), PAA = poly(acrylic acid)) layer-by-layer assembly and chemically polymerized poly(N,N-diethylacrylamide) (PDEA) hydrogel containing horseradish peroxidase (HRP). The films exhibited reversible pH-, thermo-, and sulfate concentration responsively reversible on-off behaviors toward K3Fe(CN)6 in its cyclic voltammetric (CV) response. Taking thermo-switch as an example, at 25°C, CVs showed a large and well-defined peak pair of Fe(CN)63− and the system was at the on state; while at 40°C, the CV peaks were greatly suppressed and the system was at the off state. The bioactivity of HRP enzyme embedded in the films was well maintained and this film system could be further employed to control and modulate the bioelectrochemical reduction of H2O2 by HRP with K3Fe(CN)6 as the mediator in solution. This triple-triggered bioelectrocatalysis based on the binary interface system could be used as a 3-input AND logic gate and demonstrated the potential perspective for fabricating novel multiple factor-switchable biosensors with immobilized enzymes.
研究领域:
材料科学
·
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Long Chen,Yanhui Li,Lina Chen,Na Li,Chenglong Dong,Qiong Chen,Beibei Liu,Qing Ai,Pengchao Si,Jinkui Feng,Lin Zhang,Jonghwan Suhr,Jun Lou,Lijie Ci
A flexible and free-standing graphene oxide and nylon 6 (GO@nylon 6) multilayer nanofiltration membrane was prepared by a layer-by-layer assembly process. The combination of electrospinning and electrospraying technique was employed, which can facilely prepare large-area membrane with size of 20 × 30 cm. The mechanical stability of multilayer membrane has enhanced significantly due to the tightly locked structure achieved by nylon 6 nanofibers network. The novel GO@nylon 6–13 multilayer nanofiltration membrane demonstrated a pure water flux up to 11.15 L m −2 h −1 bar −1 , while keeping high organic dye rejection rate (>95% for methylene blue, and >99% for methyl orange). The rejections rate of the Na 2 SO 4 , NaCl, CuSO 4 , and Pb(NO 3 ) 2 were 56.5%, 27.6%, 36.7%, and 18.9%, respectively. Furthermore, GO@nylon 6–13 multilayer nanofiltration membrane also demonstrated a high flux of some common organic solvents (8.4, 5.3, and 0.8 L m −2 h −1 bar −1 for methanol, ethanol, and NMP, respectively), showing excellent chemical stability for separation process in those solvents.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2014
·Vol. 211
·期 7
·1651-1654
·
IF 1.525
Jiaqing Mo,Yajun Liu,Chunliang Liu,Zhenhong Jia
This paper reports on the use of a novel all-porous-silicon configuration consisting of a surface grating and a high-reflectivity quarter-wave stack, arranged as both an all-porous-silicon grating diffractive device, and a highly sensitive and inexpensive biosensor. The diffraction efficiency of the top surface grating in this structure can be considerably improved for biosensing. Moreover, a porous-silicon high-reflectivity multilayer can not only prevent the signal energy from radiating to the substrate, but also increase the internal surface area of the sensing platform for detecting more probing molecules. When 3-aminopropyltriethoxysilane (APTES) was employed as a probing molecule, the sensitivity of the proposed structure increased up to 1 order higher than the porous-silicon diffraction-grating biosensors without a high-reflectivity quarter-wave stack. It has been shown by experimentation that before and after the APTES, −3-order diffraction efficiency changes from 1.30 × 10 −3 to 1.25 × 10 −4 . Excellent agreement is achieved between the experimental results and simulations based on the rigorous coupled-wave analysis.
研究领域:
材料科学
·
生物医学工程
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Tonghe Xing,Annan He,Zhiming Du,Yu Zhang,Yuxin Luo,Zhiyu Huang,Mengqi Wang,Zhicheng Shi,Aixin Tong,Sijie Qiao,Xiaohong Liao,Jie Bai,Heng Pan,Zihui Liang,Wei Ke,Hao Yu,Fengxiang Chen
Silk fiber, as a luxurious textile raw material, is widely used in the textile industry due to its excellent mechanical properties and wearing comfort. However, the poor (ultraviolet, UV) light stability of silk affects its further application in high-end textiles, fashionable apparel, and smart materials. Although surface modification can endow the excellent UV resistance of silk fibers, it often reduces its comfort property. Herein, a laminated ultrathin Al2O3/TiO2 coating with a total thickness of 120 nm is fabricated on the surface of silk fiber via a modified atomic layer deposition (ALD) technique. The tenacity of ALD-coated silk can maintain 61.1% of its original value after exposure to intense UV light (640 mW/cm2) under high temperature (>200 °C) for 6 h, which is far superior to other work that has been reported. This can be attributed to the synergistic effect of the reflection of UV light by the multilayer film barrier, the strong oxidizing free radicals by the Al2O3 layer in the innermost layer, and thermal shield of laminated ultrathin Al2O3/TiO2 film. ALD-coated silk fabrics can also demonstrate a multicycle laundering durability, thermal and chemical stabilities, and flame retardancy. More importantly, the wearing comfort of the modified silk has no obvious change. This method provides principle and technical guidance in high-performance and multifunctional fibers and devices.
研究领域:
材料科学
·
纺织工程
·
表面改性技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2010
·
IF 3.167
Xue Mao,Bin Ding,Moran Wang,Yanbing Yin
In this study, a novel nanocomposite multilayers was deposited on the electrospun nanofibrous mats by an electrostatic layer-by-layer (LBL) self-assembly technique. The positively charged water-insoluble 2,9,16,23-tetraaminophthalocyanine copper (CuTaPc) and the negatively charged water-soluble poly(acrylic acid) (PAA) were alternately deposited on the surface of negatively charged nanofibrous cellulose mats. The cationic CuTaPc was synthesized and characterized by UV–Vis and Fourier transform infrared (FT-IR) spectroscopy. The template nanofibrous cellulose mats were obtained from the alkaline hydrolysis of electrospun nanofibrous cellulose acetate mats. The resultant nanofibrous mats were characterized by scanning electron microscopy (SEM) and FT-IR spectroscopy. The SEM images showed that the composite LBL structured films were homogeneously deposited on the surface of the nanofibers . The diameters of nanofibers increased with the number of deposition bilayers . The average thickness of each CuTaPc/PAA bilayer is about 10 nm. Additionally, the FT-IR spectra results also indicated that the CuTaPc and PAA were coated on the nanofibrous cellulose mats.
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
KEY ENGINEERING MATERIALS
·
2016
·
IF 0
Jian Shu,Yu Song Liao
Poly (diallyl dimethylammonium chloride)-graphene oxide multilayer film (PDDA/GO) was successfully fabricated onto a silicon substrate by a layer-by-layer self-assembly technology. Subsequently, PDDA/GO were thermally reduced to be PDDA/RGO in a vacuum. X-ray photoelectron spectroscopy (XPS) was carried out to investigate the formation and microstructure of multilayer samples, as well as by water contacted angle (WCA). Results indicates that the multilayer film was prepared successfully, and the surface energy of PDDA/RGO is lower than PDDA/GO. nanotribological properties was investigated by an atomic force microscopy (AFM). It was found that the frictional coefficients of PDDA/RGO is better than PDDA/GO. To investigate the micro-tribological behaviors, a ball-on-plate tribometer was adopted. Results show that the layer-by-layer self-assembled multilayer thin film possesses good frictional and anti-wear properties. Therefore, both nanoand micro friction performance of PDDA/RGO behaves better than PDDA/GO. The obtained samples make the further application to be more possible.
研究领域:
材料科学
·
表面工程
·
纳米技术
✓ 已验证
DOI
FOOD CONTROL
·
2021
·
IF 5.548
Jianghao Yan,Min Li,Huifang Wang,Xiaojie Lian,Yanying Fan,Zhigao Xie,Baolong Niu,Wenfeng Li
Traditional plastic packages threaten the security of the environment and human beings. In this circumstance, novel biodegradable composite packages based on biodegradable materials have attracted increasing attention. In this study, the multilayer films containing chitosan and polyvinyl alcohol were prepared by Layer-by-Layer assembly technology with the addition of ferulic acid as a cross-linking agent. They demonstrated the enhanced performances in terms of tensile strength , water resistance, and antioxidant activity , while the interaction between PVA and chitosan was investigated by structure analysis. Successively, the addition of Cu 2 O@NCs further improved the tensile strength, water resistance, and antibacterial activities of films due to the well-dispersed nanoparticles in the matrix. The prepared films exhibited biodegradable properties and extended the shelf life of cherry tomatoes . In summary, the prepared composite films exhibited great potential for functional food packaging.
研究领域:
材料科学
·
生物学
·
食品科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）