JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 3
·49697
·
IF 2.52
Xiaoqiang Jin,Huihong Jiang,Fenghui Qiao,Weipin Huang,Xiaojiong Bao,Zhengke Wang,Qiaoling Hu
Conductive hydrogels have attracted a myriad of interest due to their potential applications for human motion monitoring, personal healthcare diagnosis and so forth. However, fabrication of hydrogel-based strain sensors integrating with ultrastretchability, adhesiveness, strain sensitivity, biocompatibility, and self-cleaning function is still a challenge. Herein, a new type of semi-interpenetrating multifunctional hydrogels, which integrated all above practical features magically were prepared via a facile one-pot in-situ radical copolymerization method. Thereinto, [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide (SBMA) and acrylamide (AAm) copolymers cross-linked by N , N ′-Methylenebisacrylamide (MBAA) served as the soft and functional matrix, whereas alginate was employed as the enhanced component. The transparent zwitterionic hydrogels had a max elongation and ionic conductivity of 1353% and 0.15 S/m, respectively. They could adhere onto various surfaces, including steel, glass, skin, and rubber. The repeatable adhesiveness, linear strain sensitivity within 0%–250% tensile strain and 0%–30% compressive strain provided remarkable working range and using stability. What's more notable was that the biocompatibility and self-cleaning function tested by MTT, live/dead assay, allergy patch tests, and plate colony-counting method imparted great possibility of practical application for strain sensors to hydrogels from a biological point of view.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 2
·49668
·
IF 2.52
Yuanyuan Li,Peixian Li,Minjie Wu,Xiaoyan Yu,Kimiyoshi Naito,Qingxin Zhang
Polylactic acid (PLA) polymers are promising substitutes for polluting fossil fuel-derived polymers in the field of food safety due to their environmental friendliness, good biocompatibility, and degradability. However, their poor mechanical property limits their practical utilization. In this study, abundant natural halloysite nanotubes (HNTs) were incorporated into PLA to address these issues. To overcome interfacial incompatibility between the matrix (PLA) and nanofillers (HNTs), 3-Aminopropyltrimethoxysilane (APS) were firstly grafted onto HNTs to form end-up amino groups which were served as binding sites for the polycondensation of lactic acid precursors. This formed PLA modified HNTs (pHNTs) precursor was further mixed with bulk PLA polymers to prepare the composite films by the solvent casting method. Compared with the pristine composite, the PLA/pHNTs composites show better thermal stability and mechanical properties, and the composite with 2 wt% pHNTs exhibits the best performance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 3
·49696
·
IF 2.52
Shanwen Zhu,Wenjun Wang,Zahidul MD Islam,Yaqin Fu,Yubing Dong
Shape memory epoxy (SMEP) is a high performance shape memory polymer; however, is extremely flammable which severely restricts its applications. In this work, a novel polydopamine modified ammonium polyphosphate (PDA@APP) flame retardant was prepared to improve the flame retardant and enrich the response method of SMEP. Through flame retardancy test confirmed that the flame retarding properties of the PDA@APP/WEP composites significantly improved than the APP/WEP composites, the limiting oxygen index (LOI) values of the APP/SMEP and the PDA@APP/SMEP samples increased by 29.8% and 32.2%, respectively. Moreover, the PDA@APP/WEP composites had excellent light response shape-memory performance. Interestingly, the PDA@APP/WEP treated polyester fabric exhibited excellent light crease recovery performance and excellent flame retardant property. This work develops a new method for fabric crease recovery and will help broaden the application of WEP and its composites.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 2
·49678
·
IF 2.52
Jiabao Guo,Haijie Li,Bingfeng Xue,Donghui Zhu,Xiaomeng Zhang,Haitao Zhao,Xiaoguang Qiao,Zhe Cui,Peng Fu,Qingxiang Zhao,Xinchang Pang,Minying Liu
To fabricate the low-cost transparent polyamide with high heat resistance and good melt flowing property simultaneously is a huge challenge in many high-end fields due to the contradiction between these two properties. In order to balance this contradiction, in this paper, by using isophthalic acid (IPA, aromatic monomer), 4,4′-methylenebis(cyclohexylamine) (PACM, alicyclic monomer) as rigid stereoscopic monomers, 1,6-hexanediamine (HMD, aliphatic monomer) as the flexible monomer, a series of transparent poly(hexamethylene isophthalamide/poly(m-benzoyl4,4′-methylenebis(cyclohexylamine)) (PA6I/PACMI) with rigid and stereoscopic structure (corresponding to the large distance between adjacent molecular chains) were successfully synthesized. The results indicated that the newly synthesized PA6I/PACMI copolymer has an intrinsically amorphous structure and high optical transparency, which could reach as high as 90%. Furthermore, the highest glass transition temperature ( T g ) of the copolymer is over 153.9°C, at the same time, the copolymer also possesses excellent melt flowing property, which can be melt processed easily. Therefore, the newly synthesized copolymer has great advantages in many fields, and it can also shed light on the design and fabrication of high-performance materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 10
·49966
·
IF 2.52
Yue Yin,Bo Jiang,Linghui Meng
In order to solve the poor nucleation ability and slow crystallization rate of polyethylene terephthalate (PET), we propose a new strategy to prepare PET with self-nucleation ability based on the mechanism of mutual attraction of ions. In this study, a hydroxyl-terminated sulfonate monomer, sulfonated 1,4-butanediol (SBDO) without rigid structure was synthesized as nucleating agent functionalized PET third monomer, and then PET ionomers (PETi) were prepared through melt polycondensation with different contents of SBDO. The half-crystallization time of PETi was sharply decreased in contrast with pure PET and the crystallization temperature was significantly increased from 182.6°C to 210.8°C for PETi1. Due to the high nucleation efficiency of SBDO, the crystallization temperature of PET was significantly increased, avoiding the excessive addition of traditional nucleating agents to deteriorate the mechanical properties of PET. The increased nucleation efficiency was contributed to the aggregation of SBDO induced by the ionic interactions.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 10
·49971
·
IF 2.52
Xinqiu Hong,Yongjing Xu,Liming Zou,Yan Vivian Li,Junwei He,Jiongxin Zhao
Polyvinyl alcohol (PVA) fibers were prepared using PVA with different degree of polymerization (DP) under the same wet spinning process. The effect of the DP of PVA on the structures and properties of PVA and PVA fibers were studied by using nuclear magnetic resonance hydrogen spectroscopy ( 1 H-NMR), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimeter (DSC), thermo gravimetric analysis (TGA), and environmental scanning electron microscope (ESEM). The results showed that DP had little effect on the crystallinity and tacticity of PVA, but had a positive effect on melting temperature, and initial decomposition temperature of PVAs. The hot drawing ratio determined by the spinning process where the PVA fibers could be continuously collected without breaking. The drawing ratio was decreased with an increase of DP, resulting in an increase of the final fiber diameter. The PVA fibers with medium DP and medium size demonstrated high strength and high modulus, but relatively low breaking elongation. It suggested that high DP of PVA was not a guarantee of high strength and high modulus PVA fibers, but rather a primary structure factor. The fiber performance was determined by a comprehensive effect combining a variety of factors including polymer properties and spinning conditions. It provided a guideline for PVA fiber manufacture that the PVAs with different DP require different spinning processes to obtain optimal fiber performance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 9
·49908
·
IF 2.52
Zhiqiang Du,Yang Chen,Martin Jensen,Ning Wang,Xianfeng Li,Xingxiang Zhang
Zinc oxide (ZnO) nanostructures have received widespread attention due to their unique structure and broad application possibilities, but high preparation costs and agglomeration limit their usage. In this article, low-cost and environmentally friendly cellulose and ZnCl 2 are used to synthesize ZnO nanoparticles (ZnO NPs). Subsequently, multifunctional ZnO/polyacrylonitrile hybrid nanofiber mats (ZnO/PAN@NFMs) with mechanical stability suitable for large-scale application are prepared via solution blow-spinning. The synthesized ZnO/PAN@NFMs exhibit higher photodegradation of organic dyes than earlier reported semiconductors and good recycling performance with an organic dye degradation above 94%–98% after five cycles, which is ascribed to fixation of the ZnO NPs in the nanofibers. In addition, the inhibition rate for Escherichia coli and Staphylococcus aureus is above 99.9% and the bacteriostatic rate against E. coli remains as high as 99% after 10 cycles. From these properties, the synthesized composite ZnO/PAN@NFMs are promising for wastewater cleaning and antibacterial fabrics.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 10
·49950
·
IF 2.52
Shuling Liu,Lingzhi Zhang
Partially lithiated ternary graft copolymers were synthesized through free radical graft polymerization of acrylic acid (AA), lithium acrylate (LiAA) and hydroxyethyl acrylate (HEA) onto polyvinyl alcohol (PVA). With optimized feeding molar ratio of AA/LiAA/HEA (2:1:2), the ternary graft copolymer with partial lithiation shows the best flexibility, elasticity and adhesion strength comparing to PVA-g-PAA and PVA-g-P(AA-HEA) when used as aqueous binder for Si anode. The Si anode using PVA-g-P(AA-LiAA-HEA) with the optimized molar ratio of AA-LiAA-HEA exhibits better cycling stability and rate performance, delivering a capacity of 2265 mAh g −1 with a capacity retention of 82.4% after 200 cycles at 1A g −1 . Even at a high current of 10 A g −1 , the Si electrode still obtained a high capacity of 1300 mAh g −1 .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 20
·50416
·
IF 2.52
Shaohua Wang,Ping Yang,Xiangfei Sun,Honglong Xing,Jianjun Shi
A highly-efficient nano-medical carrier system was constructed for drug release based on a facile synthesis, excellent fluorescence, and structure of phenol formaldehyde resin (PFR). The PFR was easily synthesized through a simple one-step hydrothermal reaction, reduction and etching process, and a silane coupling agent modification process. The multiple functionalized drug delivery system, defined as PFR-NH 2 @DOX was constructed by loading Adriamycin (DOX) into PFR. Drug release results in vitro displayed a DOX content of 145 mg g −1 prodrug nanosphere has excellent pH-triggered drug release (about 84.71%) within 72 h at pH 5 solution. The fluorescence recovery of PFR after DOX release indicates the potential application in fluorescence imaging and controlled drug release.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 19
·50391
·
IF 2.52
Liqiang Yi,Shuoshuo Wang,Lina Wang,Juming Yao,Jaromir Marek,Ming Zhang
In this work, a waterproof and breathable nanofibrous membrane with thermal-regulated performance and exhibits excellent mechanical property is fabricated by coaxial electrospinning. The fiber shell is consisted of polyvinylidene fluoride (PVDF) and polyvinyl butyral (PVB), and the core is octadecane. First, well-performed waterproof and breathable membranes are obtained by optimizing its morphology and pore structure. Then octadecane is loaded into the fibers in the form of core by coaxial electrospinning, though it gives the membranes a thermal regulating function, but the drawback is the sacrifice of overall properties. Thus, carbon nanotubes are loaded into the shell and studied, finally, the best membrane has a comprehensive performance with hydrostatic pressure of 59.2 kPa, water vapor transmission rate (WVTR) of 7.846 kg m −2 d −1 , latent heat of 50.1 J g −1 , as well as excellent tensile strength of 20.2 MPa, which shows its certain reference significance to the synthesis of multifunctional membrane.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 18
·50353
·
IF 2.52
Jing Mou,Xiaojun Wang,Dongmei Yu,Shengpeng Wang,Yulong Miao,Qin Liu,Bajin Chen
We reported a novel synthesis route to fabricate sulfonated aliphatic waterborne polyurethane dispersions (SWPU) only based on 2-[(2-aminoethyl) amino] ethane sulphonate sodium (AAS-Na) by two-step chain extension method with the assistance of acetone and water cosolvent. When AAS-Na was added, only less than 50% of AAS-Na was incorporated into polyurethane chain in the first-step chain extension and the residual AAS-Na formed molecular aggregates which were insoluble in acetone due to the high polarity of AAS-Na. Subsequently, the mixture of acetone and water was added, the residual AAS-Na aggregates dissolved, undertaking the further second-step chain extension reaction, and the ultimate reaction conversion of AAS-Na rose to more than 90%. The mechanism for acetone and water cosolvent to affect the preparation of SWPU dispersions was studied, as well as the water resistance, mechanical properties and hydrolysis resistance of as-prepared SWPU dispersions. With the decrease of AAS-Na content from 2.0% to 1.2%, the peak area of the melting peaks for SWPU films increased, as well as the water resistance. And the as-prepared polyester SWPU exhibited good hydrolytic stability.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 13
·50113
·
IF 2.52
Si-Wei Xiong,Pan Zhang,Yu Xia,Qian Zou,Meng-ying Jiang,Jing-Gang Gai
The common neglect of the prominent bacterial growth and accumulation on polymer-based thermal conductive materials used in medical electronic devices will hurt the functionality and lifetime of medical devices, and sometimes even lead to medical accidents. In this study, we developed a novel ternary composite with excellent antimicrobial and thermal conductive properties to solve this problem. This composite was composed of antimicrobial functionalized hexagonal boron nitride (AB@h-BN) nanoplatelets, low melt alloys (LMAs), and epoxy. Antimicrobial testing showed that the AB@h-BN/LMAs/epoxy composites were 100% against both Escherichia coli and Staphylococcus aureus ; their antibacterial mechanism was contact killing and was harmless to the environment. Besides enhancing the antimicrobial property, the AB@h-BN nanoplatelets connected the mutually independent LMAs, forming the continuous network for heat conduction in the epoxy. Benefited from this distinctive structure, the thermal conductivity of AB@h-BN/LMAs/epoxy can reach 2.66 Wm −1 k −1 , which represented an enhancement of about 1141% over the pure epoxy.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）