JOURNAL OF APPLIED POLYMER SCIENCE
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2023
·Vol. 140
·期 40
·1-9
·
IF 3
Zhou Li,Weihang Wu,Sina Chen,Biao Xia,Tengfei Lin,Min Gao,Chunlin Zhao,Xiao Wu,Cong Lin,Weijin Yang,Yu Wang
Fluorescent hydrogels are soft materials that can emit light under certain conditions, which makes them attractive for biomedical and engineering applications. Nevertheless, one of the major challenges in developing fluorescent hydrogels is their low mechanical properties. To overcome this challenge, we have developed an efficient method for preparing high-strength and fluorescence hydrogels via freeze–thaw cycles. This approach offers a promising solution to enhance the mechanical properties of fluorescent hydrogels, which could broaden their applications in various fields. We used polyvinyl alcohol (PVA) as the main component and added 2,4,6-tri(4-aminophenyl) triazine (TAPT) as a rigid fluorescent substance. We find that these hydrogels have higher strength than conventional PVA hydrogels. These hydrogels exhibit strong fluorescence. Hydrogen bonds and π-π stacking between NH 2 and PVA construct the network structure. The composite hydrogel has significant mechanical properties, with a maximum tensile strength of 44.7 MPa, maximum elongation at break of 310.1% and Young's modulus of 138.5 MPa. Compared with the PVA hydrogel, the tensile strength and elongation at break of the hydrogel with the addition of 2% TAPT are increased by 292.6% and 153.0%, respectively. TAPT molecules are bound to the inside of the gel network, which makes the composite hydrogels have strong fluorescence. These hydrogels with high strength and fluorescence have a wide range of applications in flexible electronics and information displays.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 42
·e54539
·
IF 3
Xianjie Pan,Jiawei Li,Fanqi Liu,Chaoying Hu,Yanning Zeng
Vegetable oil-based polyurethane (PU) vitrimer is of significance for sustainable industrial development; however, development of vegetable oil-based PU vitrimers with high mechanical properties and excellent malleability by a facile synthetic process remains a challenge. Herein, a series of versatile, self-healable, weldable, and recyclable castor oil-based poly(thiourethane-urethane) networks are constructed by one-pot reactions. Double bonds and hydroxy groups in castor oil can react with thiol in 2,2′-(1,4-phenylene)-bis[4-mercaptan-1,3,2-dioxaborolane] (BDB) and isocyanate in 4,4′-diphenylmethane diisocyanate (MDI), respectively, as well as a reaction between the thiol of BDB and the isocyanate of MDI, which gives the castor oil-based poly(thiourethane-urethane) vitrimers. The obtained bio-based networks are characterized by Fourier transform infrared (FTIR) and dynamic mechanical analysis (DMA) measurements. The castor oil-based vitrimers show high thermostability ( T 5d > 312°C) due to the incorporation of rigid BDB and MDI with benzene group in the networks. Meanwhile, the castor oil-based networks have been proved to possess more excellent functions in self-healing, welding, shape memory, and reprocessing capabilities at moderate temperatures due to the dynamic boronic ester bonds. This work would be beneficial to developing of versatile vegetable oil-based poly(thiourethane-urethane) materials through a facile approach.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 40
·1-12
·
IF 3
Yongxu Li,Fang Guo,Hairui Wang,Yongyin Cui,Cancai Wang,Qingfu Wang,Lan Cao
Tooth extraction will leave a wound that may cause blood leakage, and the application of liquid-absorbing hemostatic cotton pressed on the wound can play the effect of pressure to halt bleeding. Unfortunately, the loose structure of the dental absorbent hemostatic cotton causes local slag to fall. Cotton fiber will impede wound heading and possibly drop into the throat and esophagus, thus impacting the life and health of the patient. Therefore, it is of great significance to prepare a material with toughness and high liquid absorption. The polyurethane foams (PUFs) with different chain extension coefficients synthesized from polyether polyol and diphenylmethane diisocyanate (MDI) with water as the blowing agent have excellent toughness and liquid-absorbing properties with potential applications. The hydrophilic polyethylene glycol (PEG) is introduced into the polyurethane chain segment to form a synergistic effect with the three-dimensional foam network structure to absorb more wound exudate. The hydrophobic PUFs can be applied to wounds with less exudate and the hydrophilic PUFs can be applied to chronic wounds with more exudate. The porous structure gives the PUF a strong loading capacity and promotes the wound-healing effect. The PUFs exhibit good liquid absorption/retention performance in both 0.9 wt% NaCl solution and DI water, especially PUF-1.10 has an ultimate DI water absorbency of nearly 840%. According to the performance, comparison of the current market commonly used dental absorbent hemostatic cotton; PUF-1.10 is considered a promising candidate for replacing traditional dental commercial absorbent hemostatic slag-fall cotton in liquid absorption/retention and mechanical properties.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 42
·e54544
·
IF 3
Guangchao Dong,Yuanzhi Chang,Cangang Li,Lifen Zhao,Xiujuan Tian,Xueping Liu
Polyurethane is a widely used viscoelastic polymer known for its exceptional damping properties. This paper focuses on the introduction of disulfide and imine bonds into the polyurethane matrix to enhance its damping capabilities, mechanical properties, and self-healing ability. Dynamic mechanical analysis shows that the synergistic effect of disulfide bond and imine bonds extends the effective damping temperature range of the polyurethane to 118°C (−18 to 100°C), while the effective damping frequency extrapolates to a range of 10 −2 –10 5 Hz. Furthermore, the addition of imide bonds compensates for the relatively low mechanical properties associated with disulfide bonds, allowing the polyurethane to achieve a tensile strength of 14.7 MPa at room temperature. Self-repair tests reveal that the combined action of these two dynamic bonds enables a remarkable 97% repair efficiency of polyurethane, exhibiting excellent self-healing performance. This study presents a novel approach to enhance the comprehensive properties of polyurethane.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2023
·Vol. 140
·期 40
·1-18
·
IF 3
Wan Xu,Shengyuan Zhao,Huijuan Zhang,Fangfang Niu,Xingsheng Liu,Zhenbin Chen,Yuan Sun
With the continuous depletion of global rhenium resources, the separation and purification of rhenium (Re) from secondary resources became very important. Herein, an imprinted composite membrane with “flexible chain” thermo-responsive imprinted separation layer structure (Re-TIICM) was prepared to achieve selective separation and recovery of Re from secondary resources with complex composition. Re-TIICM's thermo-responsive imprinted separation layer occurred sol/gel phase transition by adjusting the temperature, which effectively mitigated the trade-off between selectivity and desorption. The structure and performance of Re-TIICM under optimum process conditions were tested and evaluated. The results showed that Re-TIICM exhibited a maximum adsorption capacity of 0.1036 mmol/g at 35°C, a separation degree of 4.37 (MnO 4 − as disturbing ions), and remained good adsorption capacity and selectivity after 9 adsorption/desorption cycles. When Re-TIICM was applied in secondary resources, the purity of Re increased from 35.412% to 70.208% after one adsorption/desorption cycle, showing a great potential for industrial applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2023
·Vol. 140
·期 39
·e54462
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IF 3
Jia Liu,Zhengchun Cai,Yongxin Ji
The synthesis of bio-based modified amphoteric epoxy modified acrylate sizing emulsion based on reversible addition fragmentation chain transfer (RAFT) polymerization and its application in paper sizing were studied. A macromolecular chain transfer agent for RAFT polymerization was synthesized by the esterification of epoxy resin E-51 with RAFT agent to eliminate the active groups on RAFT agent. Amphoteric polymer emulsifiers with good emulsification and dispersion effects in acidic and alkaline media were successfully prepared by RAFT polymerization. After neutralization, other monomers were polymerized to access cationic sizing emulsion (acid neutralization) and anionic sizing emulsion (alkali neutralization). The effects of bio-based monomer content, hydrophilic monomer dimethylaminoethyl methacrylate (DM) content and degree of quaternization on the properties of sizing emulsion and sizing paper were further explored. In addition to the particle size and polymer dispersion index (PDI) of latex particles in different experimental groups, the water resistance, folding resistance, bursting strength, tensile strength and surface roughness of sized paper were analyzed and evaluated. Based on these results, a better sizing emulsion formulation was established. It was confirmed that the addition of bio-based monomers can improve the sizing performance of paper.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 37
·e54417
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IF 3
Mingjie Lin,Junmei Ma,Xuping Xue,Shiyang Li,Qingyi Wang,Zixuan Lv,Congjie Gao,Linxin Xue
Polyamide (PA) based thin film composite forward osmotic (TFC-FO) membranes were prepared through inter-facial polymerization (IP) processes on porous cellulose acetate (CA) substrates. A dual solvent modification process of adding DMF in the aqueous phase followed by activation with methanol was found to be able to simultaneously improve the permselectivity and anti-fouling capability of the modified membranes. On top of the acidic CA substrates, DMF could not only absorb the HCl formed in the IP processes, but also chemically bind with the PA matrix by reaction with MPD monomers, leading to formation of homogeneous thin and flat PA layers, while methanol activation further swelled the PA matrix, repaired defects and optimized water permeating channels. Using 1 M NaCl solution as the draw solution, the water flux of the CA/PA-DMF4-ME1 membrane was twice that of the pristine membrane, and 24% increase in J w /J s value from 182 to 225 L·mol −1 . Its J w /J s value could be further increased 10 times to 2000 L·mol −1 using 1 M Na 2 SO 4 solution as draw solution. RO tests for the CA/PA-DMF4-ME1 membranes showed 6-fold increase in water permeance, from 1.16 to 7.02 L·m −2 ·h −1 ·bar −1 , as well as increase in NaCl rejection from 94.8% to 97.7% from pristine membrane.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 44
·e54613
·
IF 3
Hong Zhang,Xin Zhang,Shanpeng Qiao,Bo Wang,Xu Zeng,Bo Ren,Xiaodong Yang
SBA-15 is successfully incorporated into a composite superabsorbent hydrogel polymer (SAHP) by in situ graft polymerization of acrylic acid (AA) on a carboxymethyl cellulose (CMC) backbone using SBA-15 as a filler. The structure and properties of the SAHPs are studied in detail by means of a variety of characterization methods, including Fourier transform infrared spectroscopy, X-ray diffraction, and field emission scanning electron microscopy. And the effects of the originating mate-rials (such as SBA-15, initiator, cross-linker, ratio of CMC to AA, and neutralization of AA) and pH on the water absorption properties are discussed. The obtained results show that the introduction of SBA-15 have significant effect on the intrinsic structure of the superabsorbent. Importantly, the composite SAHP exhibit higher thermal stability and significant swelling as well as water retention capacity. The prepared SAHP show good sensitivity to various surfactant solutions, which not only have water retention applications in agriculture but also show potential applications in the field of biomaterials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 43
·e54587
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IF 3
Feng Cheng,Jingting Qian,Hongbin Li,Jianwei Di,Jinmei He,Yongping Bai,Yudong Huang
Herein, we report a modified polyethylene (PE) separators via in situ polymerization of polydopamine (PDA) and coating of dense aramid nanofibers (ANFs) on the surface of PE separator. Due to the unique hydrophilic performance and cooperative effect of PDA and ANFs, the wettability and migration ability of lithium ion of the modified PE separator were obviously enhanced. Moreover, the modified PE separator have the lower thermal shrinkage, the higher melting temperature and decomposition temperature, and excellently electrolyte wettability than pristine PE separators. The capacity of the modified PE separator remains 140.29 mAh g −1 after 200 cycles at 1.0°C, and the coulombic efficiency also maintain more than 78.86%. In addition, the modified PE separator exhibits a higher lithium-ion transfer number, outstanding ionic conductivity (2.390 × 10 −4 S/cm) and small interfacial resistance (−83.85 Ω) due to its excellently electrochemical properties. Thus, the modified PE separator has great potential to fabricate the high quality separator materials for designing and developing lithium-ion batteries.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 44
·e54619
·
IF 3
Fazal Maula Khan,Mingchen Sun,Zhiwei Liu,Guanlong Li,Waheed Ali Bhagat,Kai Wang,Yan Zhao
The industry desires to create robust, resilient, thermally stable, and environmentally friendly composites. In this study, we created a poly (lactic acid) (PLA) composite via a straightforward method. The Ti 3 C 2 T X was surface-coated with polydopamine (PDA) via a bioinspired approach and was then reinforced in the PLA using melt blending. The PDA layer adorned on the Ti 3 C 2 T X provided several functional groups for the MXene nanosheets and strengthened the PLA-MXene interaction by hydrogen bonding. The well-dispersed PDA@Ti 3 C 2 T X in the PLA improved mechanical, thermal, and tribological properties. For PLA/PDA@Ti 3 C 2 T X -1, the tensile strength and elongation at the break of the nano-composite were 9.03% and 25.5% higher than pure PLA, respectively. The flexural strength and modulus were increased by 49.5% over pure PLA, reaching 148.8 and 6702 MPa, respectively. The nanocomposite toughness increased by up to 53.3%. The nanocomposites had 3.8% and 49.08% lower friction coefficient and specific wear rate, respectively, than pure PLA. The addition of Ti 3 C 2 T X and PDA@Ti 3 C 2 T X increased the thermal stability of PLA at lower temperatures and promoted carbonization. PLA/PDA@Ti 3 C 2 T X -1 showed the maximum char yield of 10 wt.% at 800°C, proving the highest thermal barrier effect due to MXene exfoliation during PDA and increased PLA dispersion state.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 44
·e54634
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IF 3
Meiling Yan,Zhihan Liu,Jing Yang,Xu Xiang
Magnetic composite hydrogels exhibit promising prospects for diverse applications, but their mechanical properties impose limitations on their further advancement. In this study, a novel approach is proposed to directly prepare magnetic composite hydrogels utilizing nanoferroferric oxide, aiming to replace the existing preparation method. Meanwhile, graphene oxide (GO) is introduced into magnetic composite hydrogels to enhance their mechanical characteristics. By employing ammonium citrate (AC) as a dispersant, the dispersion of ferroferric oxide magnetic nanoparticles at a concentration of 40 mg/mL is achieved, enabling their coexistence with GO for the preparation of magnetic composite hydrogels. Notably, the incorporation of 3 mg/mL GO and 40 mg/mL magnetic nanoparticles in polyacrylamide (PAM) hydrogel yields remarkable improvements in maximum stress and strain, reaching 148 kPa and 496%, respectively. In contrast, magnetic composite hydrogels without GO exhibit lower values of 46.5 kPa and 351%. The presence of magnetic nanoparticles imparts magnetism to the hydrogel, with higher concentrations of magnetic nanoparticles leading to increased magnetism. Moreover, the presence of AC and GO renders the hydrogels electronegative, thereby endowing them with selective adsorption capabilities. In summary, the magnetic composite hydrogels prepared by one-pot method have good mechanical properties and selective adsorption capacity, and have good application potential.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 43
·e54571
·
IF 3
Ching-Wen Lou,Sheng Chu,Peiyao Liu,Xiaomeng Wang,Jia-Horng Lin,Ting-Ting Li
Due to its exceptional mechanical properties, polyurethane (PU) foam has found wide application in various fields. Microcellular foaming not only reduces weight but also enhances the cushioning properties of PU. However, current foaming methods have limitations in improving performance. Therefore, this study aimed to construct spring-like sandwich-structured flexible PU foam composites (SFFCs). These composites were prepared using a two-step foaming method, utilizing a precise amount of polyol and isocyanate as raw materials, at room temperature (28–35°C). In the preparation process, warp-knitted spacer fabrics (WKSFs) with spring-like structures were encapsulated in the middle layer, while the top and bottom layers consisted of PUF (flexible PU foam with different ring radius differences) formed through the foaming process of polyol and isocyanate. The study focused on investigating the influence of the ring radius difference ( r = 1, 1.5, 2) and the two-layer layout (staggered, diagonal, overlapping) of the WKSFs on the compression and cushioning properties. The experimental results revealed a significant improvement in the mechanical properties of the PU with the incorporation of WKSFs. Particularly noteworthy was the excellent cushioning performance exhibited by the two-layer WKSFs sample, RPUS-1, in the dynamic impact test. RPUS-1 absorbed 94.3% of the energy and reduced the impact value to 3921 N, which is 848 N (17.7%) lower than that of PU foam. Furthermore, even after 20 cycles of compression testing, the SFFCs retained excellent compressive properties, with the compressive stress only decreasing from 0.34 to 0.19 MPa. In conclusion, this study expands the application of PU in cushioning, demonstrating their potential in providing improved cushioning properties.
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高影响因子
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