Journal of Applied Polymer Science最新文献_第2页

Carboxymethyl Cellulose/Poly (Acrylamide-Co-Vinyl Imidazole) Based Self-Healing Hydrogel for Supercapacitor Applications and Moisture Determination (Part-II) 羧甲基纤维素/聚（丙烯酰胺-共乙烯基咪唑）基自愈水凝胶在超级电容器中的应用及水分测定（第二部分）

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-20 DOI: 10.1002/app.56973

Deepika Dubey, S. K. Bajpai, Manjula Bajpai, Seema Tiwari, Sonali Bhosle, Aniteshma Chanpuria

{"title":"Carboxymethyl Cellulose/Poly (Acrylamide-Co-Vinyl Imidazole) Based Self-Healing Hydrogel for Supercapacitor Applications and Moisture Determination (Part-II)","authors":"Deepika Dubey, S. K. Bajpai, Manjula Bajpai, Seema Tiwari, Sonali Bhosle, Aniteshma Chanpuria","doi":"10.1002/app.56973","DOIUrl":"https://doi.org/10.1002/app.56973","url":null,"abstract":"<div>\u0000 \u0000 <p>Physical entanglements between carboxymethyl cellulose chains and poly (acrylamide-co-vinyl imidazole) have resulted in a unique solid hydrogel electrolyte (SHE) material with highly controllable properties. The SHE showed an excellent self-healing property, as confirmed by the “LED glowing” experiment, and the “self-healed” material recovered 78% of its original elongation capacity. The freshly prepared SHE, when put on a copper surface, required a detachment pressure (DP) of 864 Pa, while a fairly high DP of 8909 Pa was required after 24 h of contact. The SHE sample was highly flexible and regained its shape after knotting, folding, and twisting. The hydrogel also exhibited shape memory property. Finally, the samples SHE-I and SHE-IV (containing 0 and 4 mL glycerol per 40 mL of film forming solution) were charged using a 12 V supercapacitor for 2 min and then employed to glow the LED bulb as well as run the alarm clock. It was found that the sample SHE-I was able to glow the LED bulb for almost 55 min, while the sample SHE-IV successfully lighted the LED for almost 357 min. Similarly, a small alarm clock was run by the two SHE systems for 118 and 838 min, respectively.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 22","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polydopamine Doped Hexagonal Boron Nitride Coating Separator With Excellent Heat Resistance and Wettability for High-Performance Lithium Metal Batteries 高性能锂金属电池中具有优异耐热性和润湿性的聚多巴胺掺杂六方氮化硼涂层隔膜

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-20 DOI: 10.1002/app.56996

Haihua Wang, Jie Wang, Huizhu Niu, Rui Cao, KeWei Shu, Chaoxian Chen, Wei Yuan, XiaoSong Li, Yun Han, Jiaheng Li, Xinyu Shang

{"title":"Polydopamine Doped Hexagonal Boron Nitride Coating Separator With Excellent Heat Resistance and Wettability for High-Performance Lithium Metal Batteries","authors":"Haihua Wang, Jie Wang, Huizhu Niu, Rui Cao, KeWei Shu, Chaoxian Chen, Wei Yuan, XiaoSong Li, Yun Han, Jiaheng Li, Xinyu Shang","doi":"10.1002/app.56996","DOIUrl":"https://doi.org/10.1002/app.56996","url":null,"abstract":"<div>\u0000 \u0000 <p>The uneven porous structure of commercial polypropylene (PP) separators leads to non-uniform lithium deposition in lithium metal batteries. This non-uniform deposition promotes the growth of lithium dendrites, which can penetrate the separator, causing internal short circuits and posing significant safety risks. In this work, polydopamine (PDA), which is capable of undergoing self-polymerization, was introduced into h-BN. The two components formed a conjugated molecular structure through π-π interactions, providing enhanced mechanical strength and thermal stability. Subsequently, the PDA-h-BN composite (PB) was coated onto the surface of commercial PP separators to fabricate a novel composite separator (PP-PB). The modified PP-PB separator exhibits excellent thermal stability, electrolyte wettability, and mechanical strength, ensuring uniform heat distribution and acting as a robust barrier against lithium dendrite penetration. Furthermore, the Li/PP-PB/Li cell demonstrated stable cycling for over 1000 h at 1 mA·cm<sup>−2</sup> and 0.5 mAh·cm<sup>−2</sup>. Similarly, the Li/PP-PB/Cu cell maintained a coulombic efficiency (CE) of 98.5% after 200 cycles at 0.5 mA·cm<sup>−2</sup>. The PP-PB separator ensures uniform lithium deposition and effectively suppresses the formation of lithium dendrites. Additionally, the Li/PP-PB/LFP battery retained a capacity of 158.6 mAh·g<sup>−1</sup> with a capacity retention rate of 98.75% after 900 cycles at 1 C, demonstrating superior cycling stability and (CE) compared to the PP-based battery (120 mAh·g<sup>−1</sup>, 85.7%). This study provides valuable insights for advancing the development of lithium metal batteries.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation and Experimental Study of the Flow Mechanism of Injection-Molded Materials for Optical Non-Spherical Cylindrical Lens 光学非球面圆柱透镜注射成型材料流动机理的仿真与实验研究

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-19 DOI: 10.1002/app.56997

Tianfeng Zhou, Shufan Lian, Peng Liu, Jianqi Yuan, Qibiao Zhou, Wenhan Yang, Jiaqin Yang

{"title":"Simulation and Experimental Study of the Flow Mechanism of Injection-Molded Materials for Optical Non-Spherical Cylindrical Lens","authors":"Tianfeng Zhou, Shufan Lian, Peng Liu, Jianqi Yuan, Qibiao Zhou, Wenhan Yang, Jiaqin Yang","doi":"10.1002/app.56997","DOIUrl":"https://doi.org/10.1002/app.56997","url":null,"abstract":"<div>\u0000 \u0000 <p>The surface quality of polycarbonate optical lenses during injection molding is critical to their optical performance. This study investigates the formation mechanism of haze-like defects on aspherical lenses under different injection speeds through a combination of simulation and experimental methods. Inappropriate injection speed leads to the appearance of noticeable haze-like opaque regions on the surface of aspherical lenses. Microscopy observations indicate the presence of oriented fiber flow lines in these haze-like regions. The experimental findings suggest that the formation of these fiber flow lines is closely related to injection speed, gate position, and abrupt changes in the flow region. Through Moldflow numerical simulations, the filling and flow behavior under different injection speeds were analyzed. The study reveals that in abrupt flow cross-section transition regions, elevated injection velocities induce significant variations in melt flow velocity, shear rate, and shear stress. High shear conditions trigger flow instabilities, while localized flow resistance caused by abrupt cross-sectional changes further amplifies these instabilities. Furthermore, localized pressure fluctuations promote bubble nucleation and premature melt solidification, ultimately leading to fiber flow mark formation. These findings establish a crucial theoretical foundation for the surface quality enhancement of polycarbonate optical lenses.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Practical Pyrogallol-Derived Epoxy Resins via Low-Temperature Two-Step Synthesis: Unlocking High Efficiency and Thermal Stability for Sustainable Application 低温两步合成实用邻苯二酚衍生环氧树脂：解锁高效和热稳定性的可持续应用

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-19 DOI: 10.1002/app.57005

Yu Long, Cui Li, Yue Zhao, Xiaohang Yu, Tao Zhang, Meng Xin, Guohua Fan, Chuncheng Hao

{"title":"Practical Pyrogallol-Derived Epoxy Resins via Low-Temperature Two-Step Synthesis: Unlocking High Efficiency and Thermal Stability for Sustainable Application","authors":"Yu Long, Cui Li, Yue Zhao, Xiaohang Yu, Tao Zhang, Meng Xin, Guohua Fan, Chuncheng Hao","doi":"10.1002/app.57005","DOIUrl":"https://doi.org/10.1002/app.57005","url":null,"abstract":"<div>\u0000 \u0000 <p>As the depletion of fossil resources drives the demand for sustainable alternatives, bio-based epoxy resins (EP) face a critical challenge in balancing processability and mechanical performance. This study presents a novel low-viscosity EP, c-E3PG, synthesized from renewable pyrogallol via a two-step low-temperature method. By optimizing reaction conditions, c-E3PG achieves a high yield (65.8%) of the target compound E3PG (pyrogallol triglycidyl ether) with minimal byproducts, exhibiting a viscosity of 1500 cps at 25°C—significantly lower than conventional petroleum-based resins. Curing kinetics analysis reveals a low activation energy (70 kJ/mol), enabling efficient crosslinking, while the cured resin demonstrates a glass transition temperature (<i>T</i>\u0000 <sub>g</sub>) of 145°C, storage modulus (<i>E′</i>) of 2900 MPa, and exceptional electrical insulation properties (breakdown strength: 142.41 kV/mm; volume resistivity: 11.0 × 10<sup>15</sup> Ω·cm). These results highlight c-E3PG's dual advantages of ease of processing and robust thermomechanical performance, positioning it as a scalable, eco-friendly alternative for high-temperature packaging and electrical insulation applications.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Foaming Agents on the Structure and Properties of Epoxy Resin 发泡剂对环氧树脂结构和性能的影响

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-18 DOI: 10.1002/app.56988

Jingkang Wang, Dongzhi Wang, Zhiqiang Yao, Kaiyang Han, Qi Li, Anqi Xia

{"title":"The Effect of Foaming Agents on the Structure and Properties of Epoxy Resin","authors":"Jingkang Wang, Dongzhi Wang, Zhiqiang Yao, Kaiyang Han, Qi Li, Anqi Xia","doi":"10.1002/app.56988","DOIUrl":"https://doi.org/10.1002/app.56988","url":null,"abstract":"<div>\u0000 \u0000 <p>Compared to solid polymers, polymer foams are widely used in civil and industrial applications, including packaging, sports equipment, absorbents, and automotive components. This is due to their superior properties, such as low weight, high strength-to-weight ratio, excellent insulation, thermal stability, impact resistance, toughness, and long fatigue life. This study presents a novel approach to incorporating dimethylhydrogensiloxane into epoxy resin for the fabrication of polymer foams, while systematically investigating the impact of foaming agent addition on the properties of the foams. The experimental results show that the foaming agent induces a reaction between the Si<span></span>H bonds in the agent and the N<span></span>H bonds in the curing agent, releasing hydrogen gas within the polymer. This reaction also forms stable Si<span></span>N bonds in the polymer matrix, significantly improving the thermal stability of the epoxy resin foam. Furthermore, the study examines how varying foaming agent concentrations influence the foam's properties. Specifically, at a foaming agent concentration of 3 wt%, the foam exhibits the highest specific compressive strength of 7.9 MPa/cm<sup>2</sup>.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Flux Thin Film Composite Membranes Prepared by Interfacial Polymerization With Pyridine or Pyrimidine Structured Diamines as Aqueous Phase Monomers for Efficient Organic Solvent Nanofiltration 以吡啶或嘧啶结构二胺为水相单体界面聚合制备用于有机溶剂高效纳滤的高通量薄膜复合膜

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-18 DOI: 10.1002/app.57004

Hongru He, Pan Xu, Shengqi Ma, Xi Wang, Daming Wang, Hongwei Zhou, Chunhai Chen

{"title":"High-Flux Thin Film Composite Membranes Prepared by Interfacial Polymerization With Pyridine or Pyrimidine Structured Diamines as Aqueous Phase Monomers for Efficient Organic Solvent Nanofiltration","authors":"Hongru He, Pan Xu, Shengqi Ma, Xi Wang, Daming Wang, Hongwei Zhou, Chunhai Chen","doi":"10.1002/app.57004","DOIUrl":"https://doi.org/10.1002/app.57004","url":null,"abstract":"<div>\u0000 \u0000 <p>Herein, a series of high-flux thin film composite organic solvent nanofiltration (TFC OSN) membranes were prepared using diamine monomers with pyridine or pyrimidine structures (2,6-Diaminopyridine (Pd), 4,6-Diaminopyrimidine (Pm)) alternatively to M-phenylenediamine (MPD) via interfacial polymerization (IP). Compared to MPD, Pd and Pm have a different number of electron-donating N atoms in the six-membered ring skeleton. As nucleophilic reagents, the presence of N atoms affects the chemical composition, structure, and cross-linkage degree of the polyamide active layers formed by their A<sub>2</sub>-B<sub>3</sub> type nucleophilic substitution reactions. The results show that the membranes prepared with Pd or Pm have higher permeability to solvent than the membrane prepared with MPD. The solvent flux of the TFC-Pd membrane (19.12 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>) and TFC-Pm membrane (12.35 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>) was 2.30 and 1.49 times that of the TFC membrane (8.32 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>), respectively. Meanwhile, the rejection of EB dye by the TFC-Pd and TFC-Pm membranes was more than 90%. Furthermore, the prepared TFC-Pd and TFC-Pm membranes all showed good organic solvent resistance and long-term operation even after immersion in strong polar <i>N</i>, <i>N</i>-Dimethylformamide at 60°C for 6 days, indicating that the high-flux OSN membranes prepared with Pd or Pm monomers have good long-term stability.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modulating Membrane Performance by Optimizing Coagulation Temperature and Dipping Time 通过优化混凝温度和浸渍时间调节膜的性能

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-18 DOI: 10.1002/app.56998

Amna Sabir, Muneerah Alomar, Muhammad Sarfraz, Farhat Yasmeen

{"title":"Modulating Membrane Performance by Optimizing Coagulation Temperature and Dipping Time","authors":"Amna Sabir, Muneerah Alomar, Muhammad Sarfraz, Farhat Yasmeen","doi":"10.1002/app.56998","DOIUrl":"https://doi.org/10.1002/app.56998","url":null,"abstract":"<div>\u0000 \u0000 <p>Mixed-matrix membranes (MMMs) comprising polysulfone (PSF) and molybdenum sulfide (MoS<sub>2</sub>) were prepared to assess the effects of precipitation temperature and dipping time on water desalination and carbon capture performance. MoS<sub>2</sub> nanoparticles were impregnated into the polysulfone matrix to enhance the separation efficacy of the fabricated composite membranes. FTIR analysis revealed the presence of key functional groups indicating changes that took place in molecular interactions and polymer crystallinity with varying temperatures. Optimal separation performance is achieved at 10°C of coagulating liquid, thus balancing CO<sub>2</sub> permeability with CO<sub>2</sub>/N<sub>2</sub> selectivity, while higher temperatures reduce selectivity. For the membrane prepared with a 40 s dipping time demonstrates the highest CO<sub>2</sub>/N<sub>2</sub> selectivity and CO<sub>2</sub> permeability are demonstrated. Longer dipping times generally increase permeability but decrease selectivity due to the formation of thicker, less uniform permselective layers. Thermal stability analysis shows that the membrane precipitated at 50°C exhibits the highest stability, whereas the membrane precipitated at 0°C is the least stable. Porosity trends indicate an increase with both temperature (32.53%–60%) and longer dipping times, with 60°C achieving the highest porosity. Performance metrics reveal that the membrane precipitated at 0°C has the highest salt rejection but the lowest water flux, with increased temperature and longer dipping times leading to higher water flux and lower salt rejection.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Novel Poly(Diol Citrate) Containing N-Hydroxysuccinimide Ester: Synthesis and Its Enabled Hydrogel Adhesive 一种新型n -羟基琥珀酰亚胺酯聚柠檬酸二醇的合成及其赋能水凝胶粘合剂

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-18 DOI: 10.1002/app.57001

Yixing Yu, Maoyi Lian, Kai Liang, Yali Ji

{"title":"A Novel Poly(Diol Citrate) Containing N-Hydroxysuccinimide Ester: Synthesis and Its Enabled Hydrogel Adhesive","authors":"Yixing Yu, Maoyi Lian, Kai Liang, Yali Ji","doi":"10.1002/app.57001","DOIUrl":"https://doi.org/10.1002/app.57001","url":null,"abstract":"<div>\u0000 \u0000 <p>Recently developed catechol-modified poly(diol citrate)-based adhesives behaved with a good biological properties and wet adhesive ability. However, a strong oxidant (e.g., sodium periodate) was inevitably required to promote solidification during bonding tissues, which would jeopardize clinical reliability. Herein, a novel water-soluble poly (diol citrate)-based adhesive of POEC-NHS, that is, poly(1, 8-octanediol-<i>co</i>-poly (ethylene oxide) citrate) (POEC) grafted by a highly reactive, biocompatible <i>N</i>-hydroxysuccinimide (NHS) ester, was designed given that the NHS active ester can build cohesion and adhesion simultaneously via its reaction with primary amine or thiol. ε-poly-<span>l</span>-lysine (PL) was selected from several biomolecules containing amino groups as a curing agent to construct two-component hydrogel adhesives (POEC-NHS/PL). The results showed the OH/COOH molar feed ratio for synthesizing POEC, the grafting ratio of NHS ester on the POEC, and the proportion of PL curing agent influenced the adhesion property of the final hydrogel; the POEC-NHS<sub>0.8</sub>/PL<sub>0.6</sub> adhesive exhibited optimal comprehensive properties with gelation times of 2–4 min and lap adhesive strength of 38.5 ± 3.0 kPa; and the POEC-NHS/PL adhesives had no obvious cytotoxicity.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing and Development of Innovative N95 Respirator Using Nanofibres Produced by Air-Assisted Electrospinning 空气辅助静电纺丝纳米纤维新型N95呼吸器的设计与研制

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-18 DOI: 10.1002/app.56978

Suresh Kumar, Ankit Singh, N. K. Palaniswamy

{"title":"Designing and Development of Innovative N95 Respirator Using Nanofibres Produced by Air-Assisted Electrospinning","authors":"Suresh Kumar, Ankit Singh, N. K. Palaniswamy","doi":"10.1002/app.56978","DOIUrl":"https://doi.org/10.1002/app.56978","url":null,"abstract":"<div>\u0000 \u0000 <p>N95 respirators generally have high filtration efficiency with lower air resistance due to the presence of a melt-blown layer, which stores electrostatic charge and provides additional particle capturing. The electrostatic charge present in the melt-blown layer drops significantly in the moist environment and adversely affects the respirator's performance. Therefore, the primary purpose of this study is to design and develop an innovative N95 respirator with a nanofibre membrane to replace the melt-blown layer. Air-assisted electrospinning, having higher productivity than conventional electrospinning, was selected for nanofibre production. A unique air-assisted electrospinning setup, producing continuous nanofiber membranes at the rate of 1.50 cm/min, was used in this study. In the first phase, process parameters of air-assisted electrospinning of polyacrylonitrile (PAN) were optimized using the Taguchi L9 orthogonal array experimental design. The optimized process parameters are the PAN solution concentration of 8% v/w, air pressure of 1.95 kPa, applied voltage of 32 kV, and polymer flow rate of 11 μL/s. In the second phase, a five-layer N95 respirator was developed by replacing the melt-blown layer used in commercial N95 respirators with nanofibre membrane layers. Both the filtration efficiency and air resistance of the developed respirator are almost equal to those of commercial respirators.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic Optimization of Cohesive Energy and Adhesive Force by Regulating End-Capping Catechol and Chain Extender 4-Aminophenyl Disulfide Toward Enhancing Bonding Strength of Hot-Melt Polyurethane 调节端盖儿茶酚和扩链剂4-氨基苯基二硫对热熔聚氨酯粘接强度的协同优化

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-18 DOI: 10.1002/app.56979

Zhiying Zhao, Peixin Niu, Yifang Zhao, Zhiyan Zhang, Saisai Zhang, Ailing Sun, Liuhe Wei, Jun Zhu, Yuhan Li

{"title":"Synergistic Optimization of Cohesive Energy and Adhesive Force by Regulating End-Capping Catechol and Chain Extender 4-Aminophenyl Disulfide Toward Enhancing Bonding Strength of Hot-Melt Polyurethane","authors":"Zhiying Zhao, Peixin Niu, Yifang Zhao, Zhiyan Zhang, Saisai Zhang, Ailing Sun, Liuhe Wei, Jun Zhu, Yuhan Li","doi":"10.1002/app.56979","DOIUrl":"https://doi.org/10.1002/app.56979","url":null,"abstract":"<div>\u0000 \u0000 <p>Vehicles and electronics rely on detachable and reusable hot-melt adhesives, but they are hard to reach structural bonding strength to date. In this work, a strategy reconciling cohesive energy and adhesion force was developed to overcome the trade-off relation between the bulk strength and bonding strength. Specifically, the prepolymer of polytetrahydrofuran ether glycol (PTMEG) capped by isophorone diisocyanate (IPDI) was deliberately extended by different content of 4-aminophenyl disulfide (AD) and capped by 3,4-dihydroxybenzaldehyde (DBD), aiming at manipulating the chain length and thereafter the aggregation state. It was found that the adhesive PU-PAD1.4 has reached an ideal balance between cohesion and adhesion. This adhesive not only boasts high bonding strength and possesses re-adhesion capabilities but also demonstrates exceptional adhesive performance on a variety of metal substrates, especially on aluminum, where its bonding strength reaches up to 12.13 MPa. Moreover, the self-healing feature of PU-PAD1.4 is particularly remarkable, as it can recover 98.28% of its original mechanical properties after being heated at 80°C for just 30 min, which is mainly due to the rapid reorganization of hydrogen and disulfide bonds. With its outstanding toughness and high strength, the PU-PADx adhesive offers innovative solutions for environmentally friendly and high-precision processing industries.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0