Journal of Applied Polymer Science最新文献

{"title":"Ferrocene-Based Kickers for the Radical Polymerization of Vinyl Chloride Under Suspension Conditions: Improvement of the Process","authors":"Yassir Zouhri,&nbsp;Christel Colemonts,&nbsp;Thierry Lasuye,&nbsp;André Mortreux,&nbsp;Yohan Champouret,&nbsp;Marc Visseaux","doi":"10.1002/app.57300","DOIUrl":"https://doi.org/10.1002/app.57300","url":null,"abstract":"<p>Polyvinyl chloride (PVC) is primarily manufactured via radical suspension polymerization of vinyl chloride monomer (VCM). Previously, dual-component ferrocene (Fc)-based <i>kickers</i> have been shown to enhance this process by facilitating the controlled decomposition of organic peroxides into radicals during the initiation step. However, these systems often introduce issues such as suspension destabilization, crusting, and reduced PVC thermal stability. This study evaluates alternative Fc-based <i>kicker</i> systems to address these challenges. Among the tested combinations, Fc/sodium hydroxymethanesulfinate (SFS) <i>kicker</i> proved most effective, reducing polymerization time by 24% while maintaining suspension stability. Additionally, PVC produced with Fc/SFS exhibited better thermal stability compared to previous systems employing Fc/ascorbyl palmitate (PAA). Nevertheless, uncontrolled energy release at high conversion rates posed challenges for industrial scalability. To address these issues, phase transfer agents, such as cetyltrimethylammonium bromide (CTAB), were incorporated alongside Fc/SFS to improve reactant interactions. Injecting CTAB at 40% VCM conversion stabilized the suspension and accelerated polymerization without excessive energy release. This optimized system achieved significant time savings while preserving PVC quality, presenting a promising solution for industrial implementation.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 32","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.57300","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144615378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Efficiency PLA Nano-Microfibrous Filters Enabled by Bimodal Structure and Corona Discharge","authors":"Ali Toptas","doi":"10.1002/app.57302","DOIUrl":"https://doi.org/10.1002/app.57302","url":null,"abstract":"<div>\u0000 \u0000 <p>Air pollution is a pressing issue for environmental sustainability and human health, with air filters playing a pivotal role in mitigating its effects. However, conventional polymer-based air filters pose environmental challenges. This study focuses on developing biodegradable poly(lactic acid) fibrous unimodal and bimodal filter webs using electro-blowing (EB) and solution-blowing (SB) techniques. Fiber diameters were controlled by adjusting solution concentrations (10% and 20% w/w) and applying an electric field during production. EB with low-concentration solutions produced nanofibers (Y) averaging 0.14 μm, while SB with high-concentration solutions yielded fibers (X) around 1.60 μm. Bimodal fibrous webs exhibited a dual-peak distribution with diameters centered at 0.17 and 1.56 μm. Filtration tests at a 95 L/min air flow rate for PM_0.3 particles revealed that the EB sample had the highest filtration efficiency (96.562%) and airflow resistance (177 Pa). Among bimodal configurations, X + Y, with nano/microfibers collected simultaneously, demonstrated the best quality factor (98.604% efficiency and 146 Pa Δ<i>P</i>). Corona discharge treatment further enhanced filtration efficiency, with the X + Y sample achieving 99.997% efficiency. After a week of repetitive testing, X + Y maintained high performance with 99.972% efficiency and a 192 Pa Δ<i>P</i>. These findings highlight PLA filters' potential as sustainable and efficient air filtration solutions.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 33","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666522","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}

{"title":"Adsorption of Pb in Water by Fe/MnOx-Loaded Attapulgite-Hydrochar Composites: Efficacy and Mechanism","authors":"Junwei Ge,&nbsp;Mengyu Wang,&nbsp;Tian Sun,&nbsp;Liangfei Dong,&nbsp;Huidong Liu","doi":"10.1002/app.57304","DOIUrl":"https://doi.org/10.1002/app.57304","url":null,"abstract":"<div>\u0000 \u0000 <p>In order to develop an effective method to remove Pb(II) from water, researchers created a novel composite material (FMHCA) using hydrochloric acid-activated attapulgite (HATP) and hydrochar (HC) loaded with Fe/Mn oxides. The adsorption capacities of three adsorbents were comparatively analyzed: HATP, an attapulgite-hydrochar composite (HCA), and a Fe/Mn-modified HCA (FMHCA). The microstructure, elemental composition, and pore characteristics were determined by SEM–EDX, XPS, XRD, FTIR, and BET analyses. The beneficial functional groups, including Fe-Mn oxides, hydroxyl, and carboxyl groups, present in the adsorbent were highly conducive to Pb(II) removal. The adsorption test demonstrated that the ratio of HATP to HC in the preparation of FMHCA material at a ratio of 1:3 was optimal, and FMHCA had a higher adsorption capacity for Pb(II) (<i>Q</i>_m = 320.85 mg/g) than both HATP and HCA. The adsorption of Pb(II) by FMHCA followed a pseudo-second-order model, with the isothermal adsorption model exhibiting a strong correlation with the Langmuir model. This suggests that the adsorption process is monolayer chemisorption. The findings of this study offer technical support for the cost-effective and efficient removal of heavy metals from water.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 33","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666506","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}

{"title":"The Correlation Between Microstructural Evolution and Slow Crack Growth Resistance of UHMWPE/Bi-HD Blends: A Focus on UHMWPE Content and Molecular Weight","authors":"Z. Yagoobi,&nbsp;A. Jalali-Arani,&nbsp;H. Garmabi","doi":"10.1002/app.57201","DOIUrl":"https://doi.org/10.1002/app.57201","url":null,"abstract":"<div>\u0000 \u0000 <p>This study systematically evaluates the interplay between microstructural characteristics and slow crack growth (SCG) resistance in blends of ultra-high-molecular-weight polyethylene (UHMWPE) and bimodal high-density polyethylene (bi-HD), varying in UHMWPE content and molecular weight (MW). At 1 and 5 wt% UHMWPE, cocrystallization and crystallinity were promoted, while higher contents (10 and 15 wt%) induced phase separation, thicker lamellae, and broader lamellar thickness distribution, as confirmed by thermal, morphological, and X-ray diffraction analyses. The probability of tie molecules (TMs) and zero shear viscosity were strongly correlated with UHMWPE content, underscoring the entangled network structure's dominant role in SCG. This was further evidenced by a 21% increase in strain-hardening modulus &lt; G_p &gt; (52.18 MPa), and a 25% reduction in natural draw ratio (3.2). Quantitative assessment of lamella area offered a more precise reflection of UHMWPE's influence on SCG, with higher MW UHMWPE exhibiting superior &lt;G_p &gt; due to a larger TMs fraction and lamella area. For the first time, the strain-hardened samples revealed a distinctive alternating lamellar structure with slit-like micropores. Incorporating up to 5 wt% UHMWPE into bi-HD increased micropore density while reducing pore size and uniformity. At 10 and 15 wt% UHMWPE, closed micropores predominated, indicating a restricted slippage mechanism.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 29","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331865","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}

{"title":"A Bilayered Electrospun Vascular Graft Enabling Differentiation of Adipose Derived Mesenchymal Stem Cells Toward Smooth Muscle Lineage","authors":"Asha V. Nath,&nbsp;Lynda Velutheril Thomas","doi":"10.1002/app.57287","DOIUrl":"https://doi.org/10.1002/app.57287","url":null,"abstract":"<div>\u0000 \u0000 <p>The successful engineering of vascular grafts that promote contractile SMC differentiation relies on a multifaceted approach that includes the selection of appropriate cell sources, materials, and environmental cues. The integration of insights from molecular regulation, stem cell biology, and material science is essential for advancing the field of vascular tissue engineering. In this study, a bilayered vascular graft was produced using the electrospinning technique. The electrospun inner layer is composed of polyvinyl alcohol co-ethylene, which provides mechanical stability, and the outer layer is a blend composition of gelatin vinyl acetate copolymer and polycaprolactone, which provides a microenvironment for cell growth. Morphological analysis, wall thickness, and fiber diameter measurements were performed using scanning electron microscopy. Mechanical properties, fluid uptake, and degradation studies were assessed for both mono- and bilayer scaffolds. The findings revealed that the bilayered samples exhibited an ultimate stress, Young's modulus, and suture retention of 1.98 ± 0.15 MPa, 46.53 ± 5.3 MPa, and1.19 ± 0.58 N, respectively. Furthermore, the bilayered grafts demonstrated good cytocompatibility. The study also explores the use of all-trans retinoic acid to initiate the differentiation of sheep adipose-derived mesenchymal stem cells cultured on the 3D bilayered scaffold system toward smooth muscle lineage via a two-step induction protocol. The differentiation was assessed by immunostaining for the specific markers SMA, calponin, and SM22α. The bilayered scaffold was shown to possess similar mechanical strength as native tissue and provided an ideal matrix for stem cell differentiation to smooth muscle cells and promoted vascular reconstruction.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 32","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144615009","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}

{"title":"Bio-Sponge With Collagen Fibrils as Building Blocks to Effectively Remove Anionic Dyes From Aqueous Solution","authors":"Lele Liu,&nbsp;Aofei Li,&nbsp;Xiaogang Luo,&nbsp;Xuejing Zheng,&nbsp;Keyong Tang,&nbsp;Ying Pei","doi":"10.1002/app.57247","DOIUrl":"https://doi.org/10.1002/app.57247","url":null,"abstract":"<div>\u0000 \u0000 <p>The cross-linked collagen sponge (CCS) was fabricated by crosslinking mesoscopic collagen fibrils using glutaraldehyde as a crosslinking agent. The structure of CCS was analyzed using scanning electron microscopy (SEM), Fourier infrared spectroscopy (FTIR), and thermal analysis (TA). Static adsorption experiments were conducted with Congo red (CR) as an anionic dye model to assess the adsorption capability. The findings indicate that the adsorption behavior of CCS follows the Langmuir isothermal adsorption model, quasi-second-order kinetic model, and molecular diffusion model. At 333 K, CCS demonstrates a remarkable maximum adsorption capacity (<i>Q</i>_max) of 232.1 mg/g, surpassing other reported bio-based materials in terms of its exceptional performance as an adsorbent. Thermodynamic analysis confirms the spontaneous uptake of CR by CCS. Additionally, repeated tests involving both adsorption and desorption validate the outstanding stability and reusability of CCS for sorption of anionic dyes.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 31","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574048","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}

{"title":"A Process Optimization and Release Modeling of Coaxial Electrospun Aligned Core-Shell Poly (Ethylene Oxide-Poly(l-Lactide-Co-Glycolide)) (PEO-PLGA) Nanofibers Encapsulating Nerve Growth Factor","authors":"Bhoomija Hariprasad,&nbsp;Mohammad javad Eslamian,&nbsp;Nihir Patel,&nbsp;Mohammad Reza Abidian","doi":"10.1002/app.57292","DOIUrl":"https://doi.org/10.1002/app.57292","url":null,"abstract":"<div>\u0000 \u0000 <p>Recent advances in neural regeneration have demonstrated the importance of incorporating proteins into polymeric capsules to provide both topographical and biochemical cues to cells. Coaxial electrospinning has emerged as a versatile technique for embedding delicate bioactive agents within core-shell nanofibers, enabling controlled and sustained drug release. In this study, we employed a design-of-experiment approach to systematically investigate how controllable parameters in coaxial electrospinning influence the diameter and size distribution of aligned poly (ethylene oxide)-poly(<span>l</span>-lactide-co-glycolide) nanofibers loaded with nerve growth factor (NGF). Employing a Box–Behnken Design, we identified the optimal parameter levels to minimize the response variables and conducted a regression analysis. The results indicated that optimal core-shell nanofibers, with a minimized fiber diameter of 323 nm and a fiber size distribution of 2.37%, were achieved by setting the inner flow rate to 0.33 mL h⁻¹, the outer flow rate to 2 mL h⁻¹, the collector speed to 500 rpm, the applied voltage to 17 kV, and the distance between the coaxial needle and the collector to 10 cm. Statistical analysis revealed that the inner flow rate, collector distance, and voltage significantly impacted nanofiber diameter, while collector speed was a key factor for fiber size distribution. Diagnostic plots for model evaluation showed high predictive accuracy for fiber diameter (<i>R</i>² = 0.8) but limited accuracy for fiber size distribution (<i>R</i>² = 0.5). Using these optimized parameters, we characterized the NGF release profile from the fibers, observing an initial burst release (~81% within 8 h), followed by sustained, near zero-order release (~13% over 2 weeks). The release kinetics were well-fitted to a Michaelis–Menten model, suggesting that PEO core dissolution followed by PLGA degradation governs the biphasic release behavior. This work offers a more efficient and sustainable approach to fabricating NGF-loaded, highly aligned core-shell nanofibers with a minimal diameter and narrow size distribution.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 32","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144615008","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}

{"title":"Low-Ammonia Preservation and Functional Reinforcement of Natural Rubber Latex Enabled by MXene-SiO2 Nanocomposites","authors":"Zhen-wei Guo,&nbsp;Yan-fen Mo,&nbsp;Meng-yuan Luo,&nbsp;Yu-hui Xie,&nbsp;Dong Feng,&nbsp;Feng Wu,&nbsp;Yi Mei,&nbsp;Delong Xie","doi":"10.1002/app.57295","DOIUrl":"https://doi.org/10.1002/app.57295","url":null,"abstract":"<div>\u0000 \u0000 <p>Ammonia is commonly used as a preservative for natural rubber, but its high volatility and strong irritation to the human respiratory tract pose significant health risks. In this study, we utilized the layered two-dimensional nanomaterial Ti₃C₂T_<i>x</i> (MXene) as an antimicrobial agent and synthesized MXene-SiO₂ nanocomposites by intercalating KH550-modified silica nanoparticles into MXene. This nanocomposite was then incorporated into a MXene-SiO₂/low-ammonia preservation system. The results demonstrated that this novel system effectively preserved concentrated natural latex over a four-month period. Throughout this time, the volatile fatty acid (VFA) values remained below 0.1, the pH was stable at approximately 10, the mechanical stability time (MST) exceeded 700 s, and viscosity remained around 300 mPa·s—meeting the requirements for subsequent processing. The introduction of the MXene-SiO₂ nanocomposite into the preservation system had no adverse effects on the structure or performance of the dry film. The system exhibited excellent film-forming properties and promoted the formation of a cross-linked network in the vulcanized film. As a result, the tensile strength of the vulcanized film reached 22.87 MPa, a 64% increase compared to pure natural latex vulcanized film. this study provides an effective and environmentally friendly approach for preserving natural latex while simultaneously enhancing the mechanical properties of its vulcanized film.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 32","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144615007","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}

{"title":"Hydrophobic Fluorinated Polyurethane Encapsulants for Hydroacoustic Applications","authors":"Zhihua Li,&nbsp;Ziyi Wang,&nbsp;Yidan Zhang,&nbsp;Ziteng Guo,&nbsp;Bo Zhao,&nbsp;Sainan Liu","doi":"10.1002/app.57092","DOIUrl":"https://doi.org/10.1002/app.57092","url":null,"abstract":"<div>\u0000 \u0000 <p>Polyurethane elastomers are widely employed as underwater transducer encapsulants, owing to their distinctive mechanical and acoustic properties. However, the lack of hydrophobicity of polyurethanes remains a problem to be resolved. A series of hydrophobic fluorine-modified polyurethanes (FPUs) were synthesized by incorporating 1H,1H,2H,2H-perfluorodecyltriMethoxysilane (FAS-17) into polybutadiene-based polyurethane. These fluorinated chain extenders enhance the hydrophobicity by reducing surface energy and increase physical cross-linking points, thereby improving the material's overall performance. Remarkably, at a FAS-17 content of 4 wt%, the water contact angle of FPU-2 rises to 106.0°, with a water absorption rate of only 0.189%. This corresponds to a substantial 58.6% reduction in water absorption compared to unmodified polyurethane (PU), demonstrating its exceptional hydrophobicity. Additionally, the introduction of fluorine-containing chains enhances mechanical properties, with FPU-2 having an elongation at break (452%) and tensile strength (10.93 MPa). These results demonstrate that fluorinated polyurethane not only retains the essential properties for underwater sound transmission but also significantly improves hydrophobicity.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 26","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190970","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}

{"title":"Silica Composites With Nickel In Situ PU/PVP Film for pH-Responsive and ROS-Stimulated Anticancer Drug Delivery System","authors":"Neeraja Bose,&nbsp;Balaganesh Danagody,&nbsp;Kalaivizhi Rajappan,&nbsp;Ganesh Munuswamy Ramanujam,&nbsp;Aswathy Anilkumar","doi":"10.1002/app.57230","DOIUrl":"https://doi.org/10.1002/app.57230","url":null,"abstract":"<div>\u0000 \u0000 <p>Increase in chemotherapy effect of drugs has remained a challenge for cancer curing. Improving an implantable drug delivery system with increased ROS activity and stimuli responsiveness could be a better choice. Focusing on flexibility, thermal stability, and biocompatibility, polyurethane can serve as an excellent material for variant applications. Surface modification is a feasible method for improving an ideal substrate. Blending polyvinylpyrrolidone (PVP) and incorporating green-routed nanocomposite can enhance hydrophilicity, swellability, and biocompatibility. On analyzing the physicochemical changes, the SiNiO@PU/PVP film has lesser pore volume and porous nature than the Si@PU/PVP film; also, the major swelling ratio is higher for Si@PU/PVP. On correlating in vitro drug release and anticancer studies, the Si@PU/PVP film showed 92.3% release at 4.2 pH and 70% of THP-1 cell death. Thus, comparing the Si@PU/PVP film can remarkably act as an implantable anticancer drug delivery system and water antipathogen or antimicrobial substrate.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 30","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144520110","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}