International Journal of Polymer Analysis and Characterization最新文献

{"title":"Spectral characterization of polymer complexes based on poly(3,5,7,3’,4’-pentahydroxyflavone) with some ion metals","authors":"Anastasiia Dunaieva ,&nbsp;Andrii Voronkin ,&nbsp;Dmytro Mishurov ,&nbsp;Anatoliy Tatarets ,&nbsp;Alexander Roshal","doi":"10.1080/1023666X.2024.2449056","DOIUrl":"10.1080/1023666X.2024.2449056","url":null,"abstract":"<div><div>The present work focuses on investigating the complexation of some Group II metal ions and Al³⁺ with cross-linked polymers containing built-in fragments of 3,5,7,3’,4’-pentahydroxyflavone (quercetin). It has been studied how the formation of the polymer complexes manifests itself in IR, UV-vis, and fluorescence spectra of polymers. Additionally, the effect of polymer network structure on the spectral parameters of the complexes was analyzed and compared with the complexation of “free” quercetin not bound to the polymer. When a rigid and dense network is formed, metal ions face restricted access to the complexation centers, resulting in a lower concentration of bound metal ions. Moreover, it was found that unlike complexes of “free” quercetin, the complexes of quercetin-containing polymers with Group II ions exhibit extremely weak fluorescence, whereas the polymeric Al³⁺ complexes exhibit significant emission. This finding suggests that quercetin-containing polymers may be promising candidates for use as selective polymeric film indicators for detecting aluminum ions in natural and industrial environments.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 3","pages":"Pages 255-270"},"PeriodicalIF":1.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of pentaerythritol derived phosphorous based bicyclic polymer on the flammability","authors":"Shikha ,&nbsp;Neelam Yadav","doi":"10.1080/1023666X.2024.2445679","DOIUrl":"10.1080/1023666X.2024.2445679","url":null,"abstract":"<div><div>1-oxyphospha-4-hydroxymethyl-2,6,7-trioxabicyclo [2.2.2] octane (PEPA) was synthesized successfully in producing a PEPA-based monomer having an acrylate group and its polymers. Nuclear magnetic resonance (NMR), ¹H, and ³¹P spectra were used to establish their structural integrity. Thermogravimetric analysis (TGA), the limited oxygen index (LOI), and the UL-94 test were used to examine the thermal characteristics and flame retardant behavior of the systems with 15 wt% of flame retardants (PhosPTPU₁₅, Phosphorous functionalized polymer thermoplastic polyurethane). Thermoplastic polyurethane (TPU), the results reveal that LOI increases from 19% to 27.8% with the incorporation of 15 wt% PhosPTPU₁₅. SEM-EDX was used to evaluate the morphology of the TPU and its blend, which exhibits that with the incorporation of PhosPTPU₁₅ the blend showed compact morphology and supported the condensed phase mechanism of the blends.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 3","pages":"Pages 364-375"},"PeriodicalIF":1.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of dimethylamine pyrophosphate on the mechanical, thermal decomposition and flame-retardant properties of rigid polyurethane foams","authors":"Wei-Hua Gu ,&nbsp;Yu Dai ,&nbsp;Yan-Hua Yuan","doi":"10.1080/1023666X.2024.2446597","DOIUrl":"10.1080/1023666X.2024.2446597","url":null,"abstract":"<div><div>To solve the problem of the insufficient flame retardancy of rigid polyurethane (RPUF), a new flame retardant, dimethylamine pyrophosphate (DMPY), was introduced into rigid polyurethane foam, and one-step foaming technology was used to prepare RPUF/DMPY composites. Furthermore, the thermal stability, flame retardancy, combustion characteristics, and gas-phase products were analyzed via thermogravimetric analysis (TGA), limiting oxygen index (LOI), cone calorimetry (CCT), and thermogravimetric infrared spectroscopy (TG-FTIR). The flame-retardant measurements revealed that when the DMPY amount exceeded 20 parts, the LOI of the RPUF/DMPY composites increased to above 23%, and all the samples reached the UL-94 V-0 level. In addition, the peak heat release rate and total heat release values of the RPUF-3 composites prepared with RPUF/DMPY were 192.6 kW/m² and 19.98 MJ/m², respectively, which were 35.0% and 29.1% lower than those of the pure RPUF, respectively, and significantly reduced the heat release of the RPUF composites. The analysis of char residue revealed that DMPY can effectively improve the density and graphitization degree of char residue during the combustion process of RPUF/DMPY composites, thereby endowing them with excellent flame-retardant properties. On this basis, the flame-retardant mechanism of the DMPY-based flame retardant RPUF composite material is proposed. This work provides new ideas for the development of new flame retardant PPUF composites.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 3","pages":"Pages 241-254"},"PeriodicalIF":1.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of poly(lactic acid) nanocomposite films with kaolin/bentonite blended clay for packaging applications","authors":"Ravi Purbey ,&nbsp;Dipjyoti Bora ,&nbsp;Chayanika Bharadwaj ,&nbsp;Pubali Chetia ,&nbsp;Koushik Dutta ,&nbsp;Uma Maheswari R ,&nbsp;Jayaramudu Jarugala ,&nbsp;Emmanuel Rotimi Sadiku ,&nbsp;Sellamuthu Periyar Selvam","doi":"10.1080/1023666X.2024.2438724","DOIUrl":"10.1080/1023666X.2024.2438724","url":null,"abstract":"<div><div>In this study, <em>Kaolinite clay</em> from the North-East Region (NER) of India was blended with <em>bentonite clay</em> and incorporated into <em>poly(lactic acid) (PLA)</em> at different concentrations of: 1%, 3%, 5%, and 7 weight% (wt%) through the <em>solvent casting method</em>. The resulting films were characterized by using the <em>Fourier transform infrared (FTIR)</em> spectroscopy to investigate the interactions among the various functional groups. The <em>X-ray diffraction (XRD)</em> analysis was performed to determine the composites’ structure and <em>crystallinity</em>, while the <em>thermogravimetric analysis (TGA)</em> was employed to assess the thermal stability of the films. Furthermore, mechanical properties, such as the <em>tensile strength, Young’s modulus, and elongation-at-break</em> (%) were evaluated. The maximum <em>tensile strength</em> of 36.9 MPa was attained for the <em>PLA</em> film blended with 7 wt% of <em>clay</em>. However, the <em>elongation-at-break</em> (%) for this specimen was lower when compared to the neat PLA film. <em>Field emission scanning electron microscopy (FE-SEM)</em> analysis provided insights into the morphology of the poly(lactic acid)–NER <em>kaolinite/bentonite</em> blend <em>clay</em> nanocomposite films, thereby revealing significant aggregation and <em>agglomeration</em> within the specimen containing the 5 wt% of filler. Moreover, the packaging application of the films developed was evaluated to enhance the shelf life of fresh black grapes. The results revealed that the unpackaged grapes experienced spoilage, while those wrapped in the films (PLA-7%) developed and showed no signs of deterioration after the 14 days of storage at room temperature. These findings suggest that the newly developed nanocomposite films could serve as an effective option for fruits packaging applications.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 3","pages":"Pages 203-226"},"PeriodicalIF":1.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Layered double hydroxide reinforced thermal expansion fire extinguishing agent for potential solid fire prevention","authors":"Weining Du ,&nbsp;Yaqiang Jiang ,&nbsp;Mingqiang Yan ,&nbsp;Zejiang Zhang ,&nbsp;Jun Deng ,&nbsp;Zhicheng Xie","doi":"10.1080/1023666X.2024.2444293","DOIUrl":"10.1080/1023666X.2024.2444293","url":null,"abstract":"<div><div>In this work, phosphorus-decorated Zn-Al-CO₃ layered double hydroxide (PLDH) was prepared via a co-precipitation strategy and thus introduced into intumescent flame retardant dispersion to fabricate PLDH-reinforced thermal expansion fire extinguishing agent (FEA@PLDH). It was found that the phosphorus-containing unit was successfully anchored onto the PLDH. The prepared FEA@PLDH solution with a viscosity of 146 mPa·s exhibited good interfacial compatibility with the ethylene-vinyl acetate (EVA) surface. Taking advantage of the synergistic catalytic carbonization and expanded insulating barrier effects of FEA@PLDH, the corresponding coated EVA (EVA-FEA@PLDH1) with 1 wt% of PLDH could form a continuous and compact carbonaceous block layer under fire or high-temperature conditions. Meanwhile, the LOI for EVA-FEA@PLDH1 was increased from 22.0% to 32.0% and reached the UL-94 rating of V0. Moreover, EVA-FEA@PLDH1 showed delayed TTI (77 s) and T_PHRR (146 s), with 6% and 44% reductions in THR and TSP, respectively, and 43% increment in residual char, as compared to the EVA-FEA. In addition, fire resistance experiment revealed that EVA-FEA@PLDH1 could withstand the ∼1300 °C flame for 467 s longer than that of the EVA-FEA (171 s). This research provides an intriguing fire extinguishing agent for the potential fire prevention of flammable polymer materials.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 142-154"},"PeriodicalIF":1.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of PPy/CeO2 nanocomposites for supercapacitor application","authors":"M. Vinitha ,&nbsp;G. Velraj ,&nbsp;K. Anandan ,&nbsp;G. K. Meenatchi ,&nbsp;Muthaiah Shellaiah","doi":"10.1080/1023666X.2024.2440504","DOIUrl":"10.1080/1023666X.2024.2440504","url":null,"abstract":"<div><div>Polypyrrole is synthesized by the chemical oxidation polymerization method with K₂Cr₂O₇ as an oxidant, and H₂SO₄ as a dopant. This method was effective, as indicated by the large yield of PPy/CeO₂ (Polypyrrole/Cerium oxide) nanocomposite produced during synthesis. FT-IR spectra demonstrated the chemical interactions between PPy and CeO₂ nanoparticles. The prepared polypyrrole and polypyrrole nanocomposites were studied through structural and optical studies using XRD and UV-Vis analysis. Average crystalline sizes of PPy and PPy/CeO₂ nanocomposites are found to be 10.4 and 8.84 nm. The electrical conductivity of polypyrrole is lower than that of polypyrrole nanocomposite, which could be attributed to the inadequate hydration water as well as the surface conductivity carried through the thin polymer layer. In comparison to n-CeO₂PPy (433 F/g) and PPy (226 F/g) at the scan rate of 100 mV/s, the electrochemical measurements demonstrated that the fabricated electrode of n-CeO₂PPy is a suitable electrode material and can improve the capacitive performance of supercapacitors due to its high capacitive value (433 F/g). Electrochemical studies showed that CeO₂PPy nanocomposites (n-CeO₂PPy) have improved specific capacitance and reduced impedance compared to PPy. These improvements can be attributed to the synergistic effects between PPy and CeO₂PPy nanocomposites, which facilitate efficient charge transport and ion diffusion.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 122-132"},"PeriodicalIF":1.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication, optical behavior and structural characteristics of the poly (4-chloroaniline)/silver nanoparticles materials for optical devices","authors":"B. M. Alotaibi ,&nbsp;Hadeel A. Aldossary ,&nbsp;A. Atta ,&nbsp;E. Abdeltwab ,&nbsp;M. M. Abdelhamied","doi":"10.1080/1023666X.2024.2447000","DOIUrl":"10.1080/1023666X.2024.2447000","url":null,"abstract":"<div><div>In this study, the flexible composite P(4-CAni)/AgNPs, which consists of poly 4-chloroaniline P(4-CAni) and silver nanoparticles (AgNPs), was successfully prepared using the polymerization preparation method. The results were confirmed by the transmission electron microscope (TEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The XRD shows the successful fabrication of the composite and confirms that the pure P(4-CAni) has a typical pattern for the amorphous conducting polymer. The results of the TEM indicated the size of AgNPs in the range from 13 to 28 nm. In addition, the FTIR demonstrates that the AgNPs nanoparticles are uniformly interacted with the P(4-CAni). The wettability and adhesion work of the surface were determined by measuring the contact angle. Moreover, the band tail increased from 1.15 eV for the P(4-CAni) to 1.85 eV, 1.91 eV, and 1.96 eV when P(4-CAni) is mixed with 1.5%, 3%, and 4.5% AgNPs, respectively. Also, adding 1.5%, 3%, and 4.5% AgNPs decreases the band gap energy from 3.48 eV for the P(4-CAni) to 3.12 eV, 3.04 eV, and 2.90 eV, respectively. The interaction between P(4-CAni) and AgNPs enhances the structural properties of the composite, making the P(4-CAni)/AgNPs composite a multifunctional material suitable for various applications. The results demonstrate the fabricated nanocomposite materials exhibiting novel optical properties, which could lead to the use of these composites in optoelectronic devices.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 177-189"},"PeriodicalIF":1.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Technique for measuring the low pull-out forces of bonded fibers: application to glue-based false eyelashes","authors":"Nathan Macdonald ,&nbsp;Jimmy Mays","doi":"10.1080/1023666X.2024.2441939","DOIUrl":"10.1080/1023666X.2024.2441939","url":null,"abstract":"<div><div>Until now, no method has been reported for measuring fiber pull-out forces in false eyelashes. Many false eyelashes are handmade and are comprised of poly(butylene terephthalate) (PBT) lashes with glue bases. Due to their small size, delicate nature, and complexity with regards to varying depths of embedment, angle of attachment of fibers to the base, and physical interactions between fibers of false eyelashes, conventional tensile testing machines are not able to grip individual lashes and accurately measure the small forces of detachment. In this work, a custom tensile testing instrument was used to investigate the effect of an approximately 120 °C curling step on the strength of adhesion of PBT fibers to the glue base. To account for the effects of structural complexity on the mechanical pull-out strength of individual fibers, 20 individual fibers were pulled from 11 different models of eyelashes, both before and after curling. A Kolmogorov-Smirnov normality test was employed to assure the data collected were normally distributed, and means and standard deviations were calculated. A two-tailed t-test revealed that 10 of the 11 tested eyelash models showed no statistically significant difference in mechanical strength before versus after the curling process.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 133-141"},"PeriodicalIF":1.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Graft copolymerization of carboxymethylcellulose with solketal acrylate","authors":"Khaled Beyaz ,&nbsp;Emeline Vedrenne ,&nbsp;Carlos Vaca-Garcia ,&nbsp;Sophie Thiebaud-Roux ,&nbsp;Ahmed Benaboura ,&nbsp;Nabila Haddadine","doi":"10.1080/1023666X.2024.2445671","DOIUrl":"10.1080/1023666X.2024.2445671","url":null,"abstract":"<div><div>The objective of this work is to synthesize new materials based on cellulose fiber. In this study, we presented the synthesis of a new biomaterial by conducting graft polymerization of 2,2-dimethyl-1,3-dioxolan-4-yl methyl acrylate (DMDMA solketal acrylate) onto carboxymethylcellulose (CMC), using KPS as an initiator. We conducted several experiments to determine the optimal conditions for preparing this biopolymer, varying the reaction time and the ratio between the initiator and the monomer. The results revealed that the highest grafting yield, 52%, was obtained after 72 min at 65 °C, with 6.26 mmol of KPS/eq OH and 4.43 moles of DMDMA/eq OH, using THF as a solvent. FTIR spectroscopy confirmed the grafting of monomers onto the CMC. Thermogravimetry showed that the degradation of the grafted CMC occurs in two stages, unlike the degradation of the CMC, which occurs in a single stage, confirming the modification of the starting product. SEM images clearly show the morphological difference between the CMC and the grafted CMC. The BET analysis reveals moderate adsorption at low pressure, followed by a marked increase at high pressure, indicating the presence of mesopores. The hysteresis between adsorption and desorption also suggests closed pore structures. The pore size distribution shows a predominance of pores between 30 and 100 Å, providing an optimal specific surface area for small molecule adsorption and catalytic reactions. This mesoporous profile is suitable for adsorption and catalysis applications. To our knowledge, our study represents the first use of the synthesized monomer, DMDMA solketal acrylate, for grafting onto the structure of CMC, highlighting the originality of our research.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 190-201"},"PeriodicalIF":1.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the material and mechanical characteristics of 3D printed composites utilizing nSiO2-particulate-reinforced PLA/HDPE filaments with potential applications in the medical field","authors":"Aezhisai Vallavi M. S. ,&nbsp;Mugilan. T. ,&nbsp;Sridhar. N.","doi":"10.1080/1023666X.2024.2444320","DOIUrl":"10.1080/1023666X.2024.2444320","url":null,"abstract":"<div><div>Significant progress in 3D printing technology over recent decades has allowed for the creation of biomedical products with enhanced properties. The incorporation of composite materials in 3D printing offers innovative solutions to a wide range of real-world challenges in medical applications. The present research focuses on the additively manufactured 3D-printed polymer composites developed through the fused deposition modeling technique. Mechanical characteristics such as tensile, compressive, flexural, and Shore D hardness have been investigated in pure PLA/HDPE and with different 1, 2, 3 wt.% of functionalized nSiO₂ reinforced PLA/HDPE. Their results showed that excellent mechanical strength was observed in the 2 wt.% nSiO₂/PLA/HDPE composite as 147.3 MPa tensile strength and 4.05 GPa Young's modulus. Subsequently, the material characteristics of the 2 wt.% nSiO₂-reinforced composite were investigated with various analytical techniques. FESEM micrographs revealed that the developed composites with a rougher surface promoted cell attachment and proliferation and had no delaminated parts in the printed layer. EDAX analysis confirmed the reinforcement material nSiO₂ particles present in the developed composite. The prominent sharp peaks of nSiO₂ incorporated in the 3D-printed composite have an excellent crystallinity nature with 84.3%. The presence of nSiO₂ reinforcement in the composite matrix was confirmed by FTIR and Raman spectroscopy. TGA/DTG results displayed the 7.36% high thermal stability of the nSiO₂-reinforced composite. Thus, the developed composite was found to be a promising material for bone implants in biomedical applications.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 155-176"},"PeriodicalIF":1.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}