Gang Long , Lei Chen , Xuhui Chen , Hao Liu , Wei Xiong , Xiujuan Sun , Fang Hao
{"title":"Interface engineering in Ni(OH)2/NiOOH heterojunction to enhance energy-efficient hydrogen production via urea electrolysis","authors":"Gang Long , Lei Chen , Xuhui Chen , Hao Liu , Wei Xiong , Xiujuan Sun , Fang Hao","doi":"10.1016/j.jcis.2024.11.023","DOIUrl":"10.1016/j.jcis.2024.11.023","url":null,"abstract":"<div><div>Electrochemical urea electrolysis has merged as a promising alternative to conventional water splitting methods for hydrogen fuel production due to its cost-effectiveness and superior energy efficiency. The utilization of heterostructures has been proposed as a viable strategy to improve the efficiency of the urea oxidation reaction (UOR) by augmenting the quantity of active sites and optimizing the electronic structure. In this study, a Ni(OH)<sub>2</sub>/NiOOH heterojunction, referred to as H-Ni, was synthesized via a straightforward hydrothermal synthesis method. The notable performance of H-Ni in UOR is ascribed to the synergistic interaction between Ni(OH)<sub>2</sub> and NiOOH, which constitute the principal components of the catalyst. Density functional theory (DFT) calculations reveal that the H-Ni composite is capable of modulating the <em>d</em>-band center, thereby enhancing the adsorption and desorption of reaction intermediates and decreasing the Gibbs free energy (ΔG) associated with the rate-determining step (RDS) of the UOR. Experimental results from catalytic performance tests indicate that the H-Ni-140 catalyst attains a current density of 10 mA·cm<sup>−2</sup> in a 1.0 M KOH electrolyte containing 0.33 M urea at a relatively low potential of 1.341 V versus reversible hydrogen electrode (RHE), thereby highlighting its superior electrocatalytic performance. Furthermore, the catalyst requires only a cell voltage of 1.78 V to achieve a current density of 100 mA·cm<sup>−2</sup>, which is approximately 120 mV lower than that required for water electrolysis. This work presents a straightforward methodology for the cost-effective development of heterojunction catalysts.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 880-889"},"PeriodicalIF":9.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142638177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lili Yang , Dan Lv , Runfeng Song , Jingyi Luan , Hongyan Yuan , Jie Liu , Wenbin Hu , Cheng Zhong
{"title":"Pre-lithiation synergized with magnesiothermic reduction to enhance the performance of SiO anode for advanced lithium-ion batteries","authors":"Lili Yang , Dan Lv , Runfeng Song , Jingyi Luan , Hongyan Yuan , Jie Liu , Wenbin Hu , Cheng Zhong","doi":"10.1016/j.jcis.2024.11.030","DOIUrl":"10.1016/j.jcis.2024.11.030","url":null,"abstract":"<div><div>Due to its high theoretical specific capacity, micron-sized silicon monoxide (SiO) is regarded as one of the most competitive anode materials for lithium-ion batteries with high specific energy density. However, originating from the low initial Coulombic efficiency (ICE) and large volume expansion, its large-scale application is seriously hindered. Herein, an easy-to-implement solid-state pre-lithiation method synergized with the magnesiothermic reduction process was performed to enhance the ICE of SiO and a common bimetallic hydride was used as a prelithiation reagent. Moreover, the effects of different pre-lithiation reagent amounts on the physical and electrochemical properties of SiO<em><sub>x</sub></em> are investigated. Notably, the SiO<em><sub>x</sub></em>-LA@C composite anchored by in-situ generated LiAl(SiO<sub>3</sub>)<sub>2</sub> shows a more stable microstructure and excellent electrochemical properties, which delivers an ultrahigh ICE of 89.4 % and an excellent initial capacity of 1864.4 mAh g<sup>−1</sup>. Furthermore, the full cells were successfully assembled by using the prepared anodes, which exhibit relatively stable cycle performance over 150 cycles. This work suggests a safe and feasible route to enhance the ICE of SiO<em><sub>x</sub></em> for the applicable SiO-based anode materials.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 928-936"},"PeriodicalIF":9.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142643640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhenni Huang , Shanshan Song , Qibo Xia , Junjie Sun , Shuai Wang , Jiaming Li , Zhujun Yao , Yefeng Yang
{"title":"NiS2/FeS2 binary nanoparticles confined in interconnected carbon framework with regulated pore structure enabled by citric acid for enhanced sodium storage properties","authors":"Zhenni Huang , Shanshan Song , Qibo Xia , Junjie Sun , Shuai Wang , Jiaming Li , Zhujun Yao , Yefeng Yang","doi":"10.1016/j.jcis.2024.10.202","DOIUrl":"10.1016/j.jcis.2024.10.202","url":null,"abstract":"<div><div>Recently, pyrite iron disulfide (FeS<sub>2</sub>) has emerged as a promising anode candidate for sodium-ion batteries (SIBs) due to its high theoretical capacity, affordability, non-toxicity and abundant resource in nature. However, the utilization of FeS<sub>2</sub> still confronts the challenges of inferior rate capability and cycling instability for sodium storage, stemming from its low electronic conductivity and substantial volume changes during cycling. Herein, to address these obstacles, NiS<sub>2</sub>/FeS<sub>2</sub> binary nanoparticles encapsulated within a network of interconnected <em>N</em>-doped porous carbon framework (NiS<sub>2</sub>/FeS<sub>2</sub>@NPC) are prepared by a successive solid-state ball milling, carbonization and sulfurization strategy with coordination complex of nickel iron Prussian blue analogue (NiFe-PBA) as precursor. The introduction of citric acid plays a critical role for the formation of interconnected carbon framework with regulated internal porous structure, thereby achieving heterostructured NiS<sub>2</sub>/FeS<sub>2</sub>@NPC with modulated specific surface area and pore volume. The rational design of interconnected <em>N</em>-doped porous carbon framework and heterogeneous structure guarantees rapid ion/electron transport kinetics, alleviated mechanical stress, and enhanced structural integrity. Benefitting from these advantages, the optimal NiS<sub>2</sub>/FeS<sub>2</sub>@NPC-1 electrode exhibits a high reversible capacity (545 mAh/g at 1 A/g), superior rate capability (267 mAh/g at 5 A/g) and ultrastable long-term cycling performance (98.5 % retention over 1000 cycles at 5 A/g). This study presents a novel and efficient design approach for creating durable and high-rate anode materials based on metal sulfides for SIBs.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 557-567"},"PeriodicalIF":9.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142611394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hui Zhang , Zhourong Xiao , Changxuan Zhang , Fei Ye , Jianmin Gu , Enxian Yuan , Guozhu Li , Ji-Jun Zou , Desong Wang
{"title":"Pt-supported on N-doped carbon/TiO2 nanomaterials derived from NH2-MIL-125 for efficient photo-thermal RWGS reaction","authors":"Hui Zhang , Zhourong Xiao , Changxuan Zhang , Fei Ye , Jianmin Gu , Enxian Yuan , Guozhu Li , Ji-Jun Zou , Desong Wang","doi":"10.1016/j.jcis.2024.11.031","DOIUrl":"10.1016/j.jcis.2024.11.031","url":null,"abstract":"<div><div>To mitigate carbon dioxide (CO<sub>2</sub>) emissions and advance carbon neutrality, the conversion of CO<sub>2</sub> into value-added fuels and chemicals via the reverse water–gas shift (RWGS) reaction is recognized as a promising approach. In this study, we designed platinum (Pt)-loaded nitrogen-doped carbon composite dual-phase titanium dioxide (TiO<sub>2</sub>) nanomaterials to achieve efficient photo-thermal performance in the RWGS reaction. The incorporation of Pt, nitrogen doping, and the selection of an appropriate calcination temperature enhance light responsiveness and reduce the recombination of photo-generated carriers, thereby improving the efficiency of the photo-thermal RWGS reaction. The optimized catalysts exhibited a high CO<sub>2</sub> conversion (42.79 %), a carbon monoxide (CO) production rate (81.46 mmol g<sub>cat</sub><sup>−1</sup> h<sup>−1</sup>) and over 99.9 % selectivity under conditions of 400 °C and 1.2 W cm<sup>−2</sup> light illumination. In addition, electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS) analyses revealed that Pt/TiO<sub>2</sub>@CN-525 was enriched with more oxygen defects, which was facilitate the adsorption and activation of CO<sub>2</sub>. CO temperature-programmed desorption (CO-TPD) showed that Pt/TiO<sub>2</sub>@CN-525 possesses a strong desorption capacity for CO. In addition, <em>in-situ</em> diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) pointed to COOH* as a key intermediate in the reaction process. The photo-thermal co-catalyzed CO<sub>2</sub> reduction by CO-TPD as well as <em>in-situ</em> DRIFTS indicated that Pt/TiO<sub>2</sub>@CN-525 follows the RWGS reaction. This work provides a potential strategy for the synthesis of catalysts for enhancing photo-thermal co-catalyzed RWGS reactions.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 407-416"},"PeriodicalIF":9.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142611405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Accelerating charge separation in p-n heterojunction photocathode for photoelectrochemical oxygen reduction and evolution in photo-enhanced zinc-air battery","authors":"Yunong Qin, Chengrun Liu, Xin Peng, Zhixin Ma, Ling Li, Song Chen, Wenming Zhang","doi":"10.1016/j.jcis.2024.11.024","DOIUrl":"10.1016/j.jcis.2024.11.024","url":null,"abstract":"<div><div>For the first time, we constructed a band-matched ZnO/NiO staggered p-n heterojunction photoelectrochemical (PEC) catalyst with superior charge separation and transfer efficiency to optimize the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) kinetics demands of a photo-enhanced zinc-air battery (PZAB). The ingenious design of heterojunction architecture effectively stimulates an internal self-built electric field (BEF), thus accelerating charge separation and migration during PEC catalysis. Upon illumination, the photocathode not only endows a promoted PEC catalytic competence to drive ORR and OER, but also reduces the charge–discharge voltage gap of PZAB. Density functional theory (DFT) calculations further disentangled the PEC catalysis activity origins by substantiating the strongly decreased Gibbs free energy potently for generating the essential intermediates *OH and *OOH during ORR and OER, respectively, and visualized the charge densities in photocathode to illustrate the authentic separation of photogenerated carriers. Remarkably, our work experimentally and theoretically sheds lights on engineering innovative and efficient bifunctional PEC catalysts to drive PZABs with photo-enhancement.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 387-397"},"PeriodicalIF":9.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142611294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pingwei Cai , Wanting Weng , Yue Han , Xin Li , Zhiwen Lu , Zhenhai Wen
{"title":"Boosting multi-carbon products selectivity of carbon dioxide reduction via bifunctional cyclodextrin-modification on copper/copper(I) oxide electrocatalysts","authors":"Pingwei Cai , Wanting Weng , Yue Han , Xin Li , Zhiwen Lu , Zhenhai Wen","doi":"10.1016/j.jcis.2024.11.027","DOIUrl":"10.1016/j.jcis.2024.11.027","url":null,"abstract":"<div><div>Electrochemical carbon dioxide reduction to multi-carbon (C<sub>2+</sub>) products presents a significant opportunity for converting greenhouse gases into valuable fuels and feedstocks. The development of highly active and stable catalysts remains a critical challenge. In this study, we report the design and synthesis of cyclodextrin-modified Cu/Cu<sub>2</sub>O electrocatalysts, which exhibit remarkable efficiency in driving the CO<sub>2</sub> electroreduction process towards C<sub>2+</sub> products. Our optimized catalyst achieves a C<sub>2+</sub> Faradaic efficiency exceeding 50 % at a high current density of over 200 mA cm<sup>−2</sup>. Experimental findings, supported by density functional theory (DFT) calculations, reveal that cyclodextrin plays a dual role in stabilizing Cu<sup>+</sup> and increasing the surface density of hydroxyl radicals. This dual function greatly benefits for enhancing *CO intermediate adsorption and promotes *CHO formation, thereby facilitating the crucial dimerization step for the formation of C<sub>2+</sub> products. This work provides valuable insights into the development of highly active and selective electrocatalysts by carefully tuning the local catalytic environment, potentially opening new avenues for functionalizing electrocatalysts for future research in this area.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 453-458"},"PeriodicalIF":9.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142611310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yifei Ye , Yuanyuan Cui , Li Yang , Jiaxu Zhang , Jianmin Sun
{"title":"B-containing ionic liquid modified SBA-15 for CO2-epoxide coupling reaction metal-free catalysis","authors":"Yifei Ye , Yuanyuan Cui , Li Yang , Jiaxu Zhang , Jianmin Sun","doi":"10.1016/j.jcis.2024.11.015","DOIUrl":"10.1016/j.jcis.2024.11.015","url":null,"abstract":"<div><div>A novel external-skeleton B-containing ionic liquid modified SBA-15 catalyst BBN-Imi-SBA-15-I (BBN denotes borabicyclo[3.3.1]nonane, Imi represents imidazolium ionic liquid) was successfully constructed by a post-modification method for efficiently catalyzing CO<sub>2</sub>-epoxide coupling reaction under both metal- and solvent-free conditions. 5BBN-Imi-SBA-15-I (5 refers to the molar ratio of Si to B), thanks to its synergistic effects of Lewis acid, weak base sites from tertiary amine and quaternary ammonium, hydrogen bond group and nucleophilic group, displayed good catalytic activity with 97 % product yield and 99 % selectivity at 100 °C, 2 MPa in the absence of cocatalyst. The obtained catalyst demonstrated good recyclability during six consecutive catalytic runs, also presented generality for various mono-substitute epoxides. Through in-situ NH<sub>3</sub> diffuse reflectance infrared Fourier transform spectroscopy (NH<sub>3</sub>-DRIFTS) characterization, the Lewis acidity of organo-boron was verified. Besides, kinetics research also proved the positive effect of multiple active components on efficient catalysis under milder conditions over SiO<sub>2</sub>-based metal-free catalysts.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 596-607"},"PeriodicalIF":9.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142611249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shunchao Wang , Xin Pang , Dequan Huang , Man Zhang , Sijiang Hu , Youguo Huang , Fenghua Zheng , Hongqiang Wang , Qingyu Li , Qichang Pan
{"title":"Construction of Co9S8@C-MoS2 heterostructure for fast charging and superior long-term cycling performance of sodium ion batteries","authors":"Shunchao Wang , Xin Pang , Dequan Huang , Man Zhang , Sijiang Hu , Youguo Huang , Fenghua Zheng , Hongqiang Wang , Qingyu Li , Qichang Pan","doi":"10.1016/j.jcis.2024.11.010","DOIUrl":"10.1016/j.jcis.2024.11.010","url":null,"abstract":"<div><div>Cobalt sulfide (Co<sub>9</sub>S<sub>8</sub>) is a promising anode material for sodium-ion batteries (SIBs) due to its high theoretical capacity, cost-effectiveness, and environmental friendliness. Unfortunately, the inevitable structural deterioration induced by the huge volume changes during the discharge/charge cycles leads to poor cycle performance and rate capability when evaluated as the anode material for SIB. Herein, we designed a Co<sub>9</sub>S<sub>8</sub>@C-MoS<sub>2</sub> heterostructure with abundant heterointerface and hollow structure. In the designed hybrid architecture, the self-supporting hollow carbon scaffold can provide sufficient space for volume expansion caused by Na<sup>+</sup> insertion, and the abundant heterointerface can accelerate ion-diffusion and electron transfer kinetics and dissipate the internal stress induced by volume expansion during the sodiation/desodiation process. As expected, the Co<sub>9</sub>S<sub>8</sub>@C-MoS<sub>2</sub> composite shows excellent sodium storage performance. Specifically, the Co<sub>9</sub>S<sub>8</sub>@C-MoS<sub>2</sub> composite displays excellent long-term cycling life (a high capacity of 429.4 mAh g<sup>−1</sup> is maintained after 1500 cycles at 5.0 A/g), and superior rate performance (412.6 mAh g<sup>−1</sup> is achieved even at 10.0 A/g).</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 398-406"},"PeriodicalIF":9.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142611320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fengchen Zhou , Lingyu Liu , Dongju Dai , Zhongning Huang , Yun Han , Jinchan Huang , Yatong Yang , Yankun Zou , Shoujie Guo , Xiaoyang Zhao , Pinjiang Li , Xiaolong Li , Junmin Nan
{"title":"LiF-induced in-situ engineering of a dense inorganic SEI for superior lithium storage in black phosphorus anode","authors":"Fengchen Zhou , Lingyu Liu , Dongju Dai , Zhongning Huang , Yun Han , Jinchan Huang , Yatong Yang , Yankun Zou , Shoujie Guo , Xiaoyang Zhao , Pinjiang Li , Xiaolong Li , Junmin Nan","doi":"10.1016/j.jcis.2024.10.195","DOIUrl":"10.1016/j.jcis.2024.10.195","url":null,"abstract":"<div><div>Black phosphorus (BP) has been highly regarded as a favourable candidate for fast-charging anode applications owing to its high theoretical capacity and advantageous charge–discharge platform. However, BP faces challenges related to compromised electrochemical performance resulting from an unstable solid-electrolyte interface (SEI) and substantial volumetric expansion. This study proposes the engineering of an inorganic-dense SEI on the surface of BP-C through the strategic incorporation of lithium fluoride (LiF). The presence of LiF in the system preferentially promotes LiPF<sub>6</sub> adsorption from the electrolyte, facilitating the <em>in-situ</em> formation of a lithium-enriched inorganic SEI film on the BP-C particulate surfaces. This strategic formation effectively mitigates subsequent electrolytic decomposition, accommodates volumetric expansion, and substantially improves the rate capability and cycling stability of the system. Consequently, the BP-LiF-C electrode demonstrates high initial coulombic efficiency of 86.8 % and maintains a steady capacity of 926.1 mAh g<sup>−1</sup> over 700 cycles at 2000 mA g<sup>−1</sup>. Moreover, when paired with a LiFePO<sub>4</sub> cathode, the full cell exhibits long cycling stability, retaining 98.6 % of its capacity after 500 cycles at 2000 mA g<sup>−1</sup>, and performs at high rate. Therefore, utilising LiF to modulate the interfacial architecture of BP-based electrode composites provide notable guidance to enhance energy storage systems.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 364-372"},"PeriodicalIF":9.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ning Ding , Yi Yang , Binbao Lu, Rui Zhang, Pengwu Xu, Deyu Niu, Weijun Yang, Piming Ma
{"title":"From a bio-based polyphenol diol intermedia to high-performance polyurethane elastomer: Thermal stability, reprocessability and flame retardancy","authors":"Ning Ding , Yi Yang , Binbao Lu, Rui Zhang, Pengwu Xu, Deyu Niu, Weijun Yang, Piming Ma","doi":"10.1016/j.jcis.2024.11.017","DOIUrl":"10.1016/j.jcis.2024.11.017","url":null,"abstract":"<div><div>In this work, a novel bio-based polyphenol diol intermediate (VDP) was synthesized through a combination of aldimine condensation and addition reactions, utilizing vanillin, 4,4′diamino diphenylmethane (DDM), and 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide (DOPO) as reactants, then various contents of VDP was introduced covalently into the polyurethane backbone. The integration of VDP has notably improved the flame retardancy of polyurethane elastomer, the limiting oxygen index (LOI) of the elastomer was elevated from 23% to 30%, and reaches V-0 rating in the UL-94 vertical burning test. The enhancement of flame retardancy is attributed to the introduction of VDP units, which not only generate PO· and PO<sub>2</sub>∙ that can capture active free radicals during combustion, but also releases non-flammable gases to improve the flame-retardant effect. Moreover, the VDP enhances the decomposition activation energy values (<em>E<sub>α</sub></em>) from 109.3 to 227.6 KJ/mol at mass loss rate (<em>α</em>) = 10%, which is attributed to the rigid benzene ring structure of VDP that significantly enhances the intermolecular interactions within the polyurethane chains. Furthermore, the elastomer shows excellent rebound resilience and reprocessability, retaining 98.6% of its original mechanical properties after multiple cycles of hot-press remolding and solvent casting.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"680 ","pages":"Pages 608-617"},"PeriodicalIF":9.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142611361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}