Polymers for Advanced Technologies最新文献_第4页

Industrially Adaptable Way for Upcycling of Mixed iPP and PE via In Situ Compatibilization 原位增容混合iPP和PE升级回收的工业适应性方法

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-04-01 DOI: 10.1002/pat.70183

Shiji Gao, Chong Ho Yu, Xiaopei Li, Enming Huang, Shiyu Wang, Xuanwei Zhang, Yongjie Zhang

{"title":"Industrially Adaptable Way for Upcycling of Mixed <i>i</i>PP and PE via In Situ Compatibilization","authors":"Shiji Gao, Chong Ho Yu, Xiaopei Li, Enming Huang, Shiyu Wang, Xuanwei Zhang, Yongjie Zhang","doi":"10.1002/pat.70183","DOIUrl":"https://doi.org/10.1002/pat.70183","url":null,"abstract":"ABSTRACT Recycling of discarded polyolefins is vital to reducing dependence on oil, promoting resource sustainability, and achieving a closed‐loop economy. Direct recycling without time‐ and labor‐consuming sorting is an efficient and economical approach to the treatment of polyolefins from mixed waste streams. However, the immiscibility of different polyolefins would lead to severe phase separation and inferior properties of generated blends. To solve this problem, an acyloxyimide‐based initiator, namely N ‐acetoxy‐phthalimide (NAPI), was utilized to in situ generate graft copolymers and grafted/functionalized polyolefins via a simple, one‐step, and scalable reactive blending approach. Compared to traditional peroxide initiators, NAPI is a more efficient H‐abstracting agent while avoiding undesired side reactions (β‐scission and cross‐linking). The in situ resultant graft copolymers and grafted/functionalized polyolefins serve as efficient compatibilizers that considerably enhance the compatibility of binary isotactic polypropylene ( i PP) and polyethylene (PE) blends by reducing interfacial tension and, consequently, improving the mechanical properties of mixed polyolefin blends. The presence of i PP‐PE graft copolymer was solidly evidenced by infrared spectroscopy analyses. Compared to the control i PP/PE blend, the elongation at break, impact strength, and bending modulus of the modified i PP/PE blend increased by 471.7%, 21.5%, and 45.7%, respectively.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pat.70183","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147902851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly Efficient Hydrogel Oil–Water Separation Membranes Prepared by Superhydrophilic Graphene Oxide Brushes 超亲水性氧化石墨烯刷制备高效水凝胶油水分离膜

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-03-31 DOI: 10.1002/pat.70082

Michun Zhong, Qiwei Zheng, Zhiwen Li, Shengwei Fang, Rufan Zhou, Chao Wang, Yumin Ye, Min Xia, Huagang Ni, Yanrong Jia, Peng Ye

{"title":"Highly Efficient Hydrogel Oil–Water Separation Membranes Prepared by Superhydrophilic Graphene Oxide Brushes","authors":"Michun Zhong, Qiwei Zheng, Zhiwen Li, Shengwei Fang, Rufan Zhou, Chao Wang, Yumin Ye, Min Xia, Huagang Ni, Yanrong Jia, Peng Ye","doi":"10.1002/pat.70082","DOIUrl":"https://doi.org/10.1002/pat.70082","url":null,"abstract":"ABSTRACT Due to the discharge of oily wastewater and oil extraction activities, the oil content and soluble pollutants in water bodies are increasing, causing serious damage to the environment. Therefore, materials with superhydrophilicity and underwater superhydrophobicity have attracted much attention in the field of oil–water separation. In this study, a graphene oxide (GO) brush (polyacrylic acid [PAA], grafted on GO) high‐efficiency hydrogel oil–water separation membrane with superhydrophilicity in air and superhydrophobicity under water was prepared by regulating the hydrophilicity through nano‐microstructures. Vacuum‐assisted filtration was utilized to prepare GO brushes into membranes. Due to the good hydrophilicity of PAA chains, grafting them onto GO sheets enhanced the hydrophilicity of the membranes and increased the surface roughness. This modification significantly increased the pure water flux of the membrane (maximum value of 428.56 L m −2 h −1 bar −1 ). With the synergistic effect of hydration capacity and layered nanostructures, the GO‐PAA membrane possesses superhydrophobic and underwater superoleophobic properties. As a result, the oil–water separation rate of GO‐PAA2 membrane was greater than 99.12%, which could realize the separation of various oil–water emulsions. Compared with the pristine GO membranes, the graphene brush membranes formed after PAA chain‐branch polymerization have higher stability and durability, stronger hydrophilicity, higher oil–water separation efficiency, and better application prospects.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333181","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}

引用次数: 4

Construction of Dual‐Functional Emulsion Micelle Interface With Ionic and Reactive Groups 离子和活性基团双功能乳液胶束界面的构建

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-03-28 DOI: 10.1002/pat.70085

Zhiwen Li, Qiwei Zheng, Michun Zhong, Chao Wang, Shengwei Fang, Renfeng Zhou, Min Xia, Yanrong Jia, Juan Zhang, Ye Peng

{"title":"Construction of Dual‐Functional Emulsion Micelle Interface With Ionic and Reactive Groups","authors":"Zhiwen Li, Qiwei Zheng, Michun Zhong, Chao Wang, Shengwei Fang, Renfeng Zhou, Min Xia, Yanrong Jia, Juan Zhang, Ye Peng","doi":"10.1002/pat.70085","DOIUrl":"https://doi.org/10.1002/pat.70085","url":null,"abstract":"ABSTRACT Internal emulsification emulsions are environmentally friendly and do not emit volatile organic compounds (VOCs). However, their micelle interface, dominated by ionic hydrophilic groups, hinders cross‐linking reactions and affects performance. We proposed a dual‐functional micellar interface (DFMI) that distributes both ionic and reactive hydrophilic groups, enhancing cross‐linking performance without significantly compromising emulsification properties. In this study, a series of sugar‐based hyperbranched waterborne polyurethane emulsions were synthesized with 2,2‐dimethylolpropionic acid (DMPA) as the ionic hydrophilic moiety. Dopamine (DA) was introduced at varying levels as the reactive hydrophilic moiety for terminal modification. The results showed that monomolecular micelles and vesicular micelles could be formed by symmetric and asymmetric modification of terminal DA. Symmetric modification tended to form unimolecular micelles, while asymmetric modification tended to form vesicular structures. Adhesion tests conducted after cross‐linking with gelatin showed that the asymmetrically modified adhesives with seven‐layer structured DA exhibited better cross‐linking degrees. Adhesion performance and swelling tests confirmed that the asymmetric structure exposed more terminal reactive groups, enhancing the utilization of the modified groups, as indicated by dynamic light scattering (DLS) for emulsion particle size and surface zeta potential. This study successfully prepared hyperbranched polyurethane emulsions with tunable micelle morphology, balancing emulsification ability, and cross‐linking degree, supporting the controlled emulsification of hyperbranched polymers and the development of bio‐based adhesives.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pat.70085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147912495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self‐Assembled Micelles Prepared From Amphiphilic Dextran‐Polylactide Diblock Copolymers for Antitumor Drug Release 两亲性葡聚糖-聚乳酸双嵌段共聚物制备的自组装胶束用于抗肿瘤药物释放

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-03-28 DOI: 10.1002/pat.70162

Haozhi Sun, Shuxin Wang, Yuandou Wang, Linlin Lu, Feng Su, Suming Li

{"title":"Self‐Assembled Micelles Prepared From Amphiphilic Dextran‐Polylactide Diblock Copolymers for Antitumor Drug Release","authors":"Haozhi Sun, Shuxin Wang, Yuandou Wang, Linlin Lu, Feng Su, Suming Li","doi":"10.1002/pat.70162","DOIUrl":"https://doi.org/10.1002/pat.70162","url":null,"abstract":"ABSTRACT Fully biobased diblock copolymers were synthesized by reducing amination from dextran (DEX) and amino‐terminated polylactide (PLA). The resulting copolymers were characterized by using nuclear magnetic resonance, Fourier‐transform infrared spectroscopy, gel permeation chromatography, and the Kaiser test. Self‐assembled copolymer micelles were characterized by transmission electron microscopy and dynamic light scattering. The micelles are spherical in shape, and the particle size increases with the increase of both DEX and PLA block lengths. The critical micellar concentration (CMC) of copolymers was determined by fluorescence spectrometry. Data showed that the CMC decreases with the increase of PLA block length. Drug loading and drug release properties of DEX‐PLA micelles were evaluated using curcumin as a model drug. An increase in drug loading content is obtained with the increase of the PLA block length. In vitro drug release from DEX‐PLA micelles was performed at 37°C in phosphate‐buffered saline. Biphasic release was observed with an initial burst followed by slower release. The drug release rate from DEX‐PLA micelles was mainly related to copolymer composition and reached 84.17% at 120 h for the copolymer with the highest hydrophilic/hydrophobic ratio (DEX 10K ‐PLA 20 ). DEX‐PLA micelles present good cytocompatibility as evidenced by the MTT assay, and drug‐loaded micelles exhibit significant cytotoxicity to HeLa cells. The half‐maximum inhibitory concentration (IC 50 ) of drug‐loaded DEX 10K ‐PLA 20 micelles was 9.12 μg/mL, which was lower than that of free curcumin (11.9 μg/mL). Therefore, self‐assembled micelles prepared from fully biobased DEX‐PLA copolymers could be a promising nanocarrier for hydrophobic antitumor drugs.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pat.70162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147895293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reinforced, Thermal‐Healing and Recyclable Chitosan/Ethylene Propylene Diene Rubber Based on Diels‐Alder Reaction 基于Diels - Alder反应的增强、热愈合和可回收壳聚糖/乙丙二烯橡胶

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-03-01 DOI: 10.1002/pat.70140

Xianning Wang, Runqi Zhang, Lujia Xuan, Mengmeng Yu, Jianqing Mao, Gang Cheng, Jieqiong Yan, Hongzhen Wang

{"title":"Reinforced, Thermal‐Healing and Recyclable Chitosan/Ethylene Propylene Diene Rubber Based on Diels‐Alder Reaction","authors":"Xianning Wang, Runqi Zhang, Lujia Xuan, Mengmeng Yu, Jianqing Mao, Gang Cheng, Jieqiong Yan, Hongzhen Wang","doi":"10.1002/pat.70140","DOIUrl":"https://doi.org/10.1002/pat.70140","url":null,"abstract":"ABSTRACT Covalent adaptable networks offer a viable approach for producing recyclable rubber materials. Nevertheless, the intricate synthesis process and insufficient mechanical strength limit their commercialization applications. In this study, the reinforced, thermal‐healing, and recyclable chitosan/ethylene propylene diene rubber (CEF‐CS) was synthesized using a solid‐phase blending process via the Diels‐Alder (D‐A) reaction. Furfural modified chitosan (F‐CS) was included as a reinforcing filler and dynamic cross‐linking point into the network formed via the D‐A reaction. The influence of F‐CS content on the mechanical, thermomechanical, and thermal repair characteristics of CEF‐CS composites was examined. The results showed that the CEF‐CS composites exhibited certain mechanical strength and dependable repair capabilities. As the F‐CS content increased, the tensile strength of CEF‐CS composites initially rose and subsequently declined, reaching a peak of 5.1 MPa, which was 5.1 times more than the control without F‐CS. The first healing efficiency of tensile strength exceeded 70%, whereas the second healing efficiency was above 60%. Moreover, the simple preparation procedure and enhanced mechanical strength facilitate the commercial utilization of recyclable rubber materials, which is crucial for addressing the environmental pollution issue associated with rubber materials.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pat.70140","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147910042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polydopamine by APP Template With SiC and Silane Hybrid Coating One‐Step Co‐Deposited UHMWPE Fibers and Corona Reinforced Epoxy Composites 应用APP模板制备聚多巴胺与SiC和硅烷复合涂层。一步共沉积超高分子量聚乙烯纤维和电晕增强环氧复合材料

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-03-01 DOI: 10.1002/pat.70151

K.X. Yu, Fanmin Kong, Guodong Jiang

{"title":"Polydopamine by <scp>APP</scp> Template With <scp>SiC</scp> and Silane Hybrid Coating One‐Step Co‐Deposited <scp>UHMWPE</scp> Fibers and Corona Reinforced Epoxy Composites","authors":"K.X. Yu, Fanmin Kong, Guodong Jiang","doi":"10.1002/pat.70151","DOIUrl":"https://doi.org/10.1002/pat.70151","url":null,"abstract":"ABSTRACT Due to low surface energy, high chemical inertness, and poor interfacial properties of ultra‐high molecular weight polyethylene (UHMWPE) fibers, it was difficult to achieve good adhesion with the matrix interface. Surface coating modification based on polydopamine (PDA) was widely applied to build high‐performance and specifically functional surface modifications. In order to improve the interfacial adhesion between UHMWPE fibers and epoxy resin, this study used a one‐step process with ammonium polyphosphate (APP) as a template to deposit a hybrid coating of PDA and N ‐(2‐aminoethyl)‐3‐aminopropyltrimethoxysilane (KH792)/3‐aminopropyltriethoxysilane (KH550)/nano silicon carbide (SiC) on the surface of UHMWPE fibers. Additionally, corona treatment was applied to increase oxygen‐containing functional groups on fibers while also improving the processing technology of composites. Due to the polymerization of PDA, the deposition of SiC, and the hydrolysis‐condensation of silanes, the nanohybrid coating can provide rich connection points and nanoparticles for hybrid fabrics without affecting the inherent strength of fibers. Corona improved surface roughness, and hybrid coatings enhanced the interfacial adhesion between the resin matrix and fibers. The UHMWPE fiber/epoxy composite material after improved composite technology exhibited excellent mechanical properties. Compared with untreated composite laminates, interfacial shear strength (IFSS) was increased by 88.81%, flexural strength was enhanced by 87.89%, impact strength was improved by 64.39%, and tensile strength was raised by 26.58%. The study showed that the nanohybrid coating co‐deposited with PDA and corona enhanced the interfacial bond between epoxy resin and UHMWPE fibers, increased relative friction at the fracture interface, and improved load transfer between UHMWPE fibers and matrix.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333113","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}

引用次数: 2

Electrochemical Effects of Encapsulating and Releasing New Synthesized Drug for Colorectal Cancer Therapy 结直肠癌新药包封与释放的电化学效应

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-03-01 DOI: 10.1002/pat.70149

Kefei Yao, He Liu, Mengxue Na, Binbin Cui

{"title":"Electrochemical Effects of Encapsulating and Releasing New Synthesized Drug for Colorectal Cancer Therapy","authors":"Kefei Yao, He Liu, Mengxue Na, Binbin Cui","doi":"10.1002/pat.70149","DOIUrl":"https://doi.org/10.1002/pat.70149","url":null,"abstract":"ABSTRACT Cancer is one of the leading causes of cancer‐related deaths worldwide and is also among the most common malignant tumors of the digestive system. With the decreasing age of onset, there is an urgent need to develop effective therapeutic strategies to improve patient survival. RAN‐binding protein 9 (RANBP9) has been identified as an oncogene involved in several cancers, including colon cancer, gastric cancer, and lung cancer. It plays a crucial role in inhibiting tumor metastasis and enhancing chemotherapy sensitivity. In this study, we synthesized a novel two‐dimensional layered coordination polymer, CP1, by reacting Co(NO 3 ) 2 ·6H 2 O, HL, and NH(CN) 2 under solvothermal conditions at 120°C. The compound crystallizes in the monoclinic C2/m space group, with its asymmetric unit containing two Co(II) ions, two half N(CN) 2 − ligands, and one HL ligand. The Co(II) ions coordinate with N(CN) 2 − ligands to form a one‐dimensional chain, which is further interconnected by HL ligands to form a two‐dimensional layered structure. These layers interdigitate through van der Waals interactions, resulting in a three‐dimensional supramolecular framework (CP1). To enhance drug delivery and therapeutic effects, compound I was encapsulated within the conductive polymer PEDOP (poly(3,4‐ethylenedioxythiophene)) along with CP1. PEDOP, a well‐known conductive polymer, is highly conductive and stable, making it an ideal candidate for drug delivery systems. The resulting PEDOP‐CP1@I nanocarrier significantly inhibited the cellular activity of HT29 colorectal cancer (CRC) cells, upregulated RANBP9 expression, and modulated the expression of apoptosis‐related genes Bax and Bcl‐2, thereby inducing apoptosis in CRC cells. These findings highlight the potential of PEDOP‐CP1@I as a promising strategy for cancer therapy.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pat.70149","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147902811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metal Complex Hydrogel as a Dual Functional Photothermal Platform for In Vitro Doxorubicin Delivery in Ocular Melanoma Treatment 金属络合水凝胶作为双功能光热平台体外给药阿霉素治疗眼部黑色素瘤

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-03-01 DOI: 10.1002/pat.70136

Ping Xie, Jing He, Yangjun Ou

{"title":"Metal Complex Hydrogel as a Dual Functional Photothermal Platform for In Vitro Doxorubicin Delivery in Ocular Melanoma Treatment","authors":"Ping Xie, Jing He, Yangjun Ou","doi":"10.1002/pat.70136","DOIUrl":"https://doi.org/10.1002/pat.70136","url":null,"abstract":"ABSTRACT Photothermal therapy is a promising adjunctive treatment technique requiring a nanoplatform with excellent biocompatibility, photothermal stability, and precise targeting capabilities. This study aims to develop such a nanoplatform by synthesizing two new manganese(II)‐based coordination polymers. The polymers were created by integrating 1,4‐bis(imidazol‐1‐yl)benzene with the ternary ligand tris( p ‐carboxyphenyl)phosphane oxide, resulting in the formulas {[Mn 3 (L) 2 (bib) 3 (H 2 O) 7 ]·12H 2 O} n (CP 1 ) and {[Mn(HL)(bib)]·H 2 O} n (CP 2 ). These structures, with large surface areas and porosity, enhance drug loading efficiency. Doxorubicin (DOX) was successfully incorporated into a biocompatible HA/CMCS hydrogel‐CP composite (HA/CMCS‐CPs@DOX), forming a robust nanotherapeutic platform. Under near‐infrared light irradiation, these metal‐hydrogel composites effectively induced localized hyperthermia, aiding ocular melanoma treatment. We evaluated the effect of HA/CMCS‐CP 2 @DOX on the cell proliferation of the uveal melanoma cell line, and the regulatory effects of the system on lncRNA ARAP1‐AS1/miR‐149‐3p/S100A4 were also explored.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pat.70136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of High‐Performance HTPB and Cerium Oxide‐Based Polyurethane Composite Liners for Solid Rocket Motors 固体火箭发动机用高性能HTPB和氧化铈基聚氨酯复合衬垫的研制

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-02-01 DOI: 10.1002/pat.70117

Naveed Ahmad Tahir, Syazana Ahmad Zubir

{"title":"Development of High‐Performance <scp>HTPB</scp> and Cerium Oxide‐Based Polyurethane Composite Liners for Solid Rocket Motors","authors":"Naveed Ahmad Tahir, Syazana Ahmad Zubir","doi":"10.1002/pat.70117","DOIUrl":"https://doi.org/10.1002/pat.70117","url":null,"abstract":"ABSTRACT Polyurethanes based on hydroxyl‐terminated polybutadiene (HTPB) have been utilized as liners in solid rocket motors due to their compatibility with propellant systems and flexible mechanical properties. However, enhancing the liners' thermal stability and mechanical strength remains a significant challenge in extreme operational environments. This study focuses on the development of an advanced composite liner for solid rocket motors (SRMs) based on HTPB and cerium oxide (CeO₂) reinforced polyurethanes (PUs). The novel HTPB/CeO₂ polyurethane composite has been synthesized to enhance the mechanical and thermal properties essential for high‐performance SRMs. These composites were characterized using Fourier transform infrared spectroscopy (FTIR), rheological analysis, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), mechanical testing, x‐ray diffraction (XRD), thermal conductivity measurements, and the limited oxygen index (LOI). With increasing CeO₂ content, the pot life decreased from 377 to 201 min. In contrast, thermal stability, as indicated by T₅%, improved from 321°C to 357°C. The inclusion of CeO₂ altered the amorphous nature of the PU composites, as confirmed by both DSC and XRD results. Additionally, tensile strength increased from 3.89 to 7.94 MPa, and elongation at break increased from 495% to 600% at a CeO₂ loading of 9% before decreasing to 362% at 12% loading. CeO₂ acted as a reinforcing agent and contributed to improving flame retardancy. These findings confirm the potential of the HTPB/CeO₂‐based composite liner to outperform traditional materials in terms of mechanical properties, thermal stability, and flame retardancy.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pat.70117","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

A Novel Strategy for High‐Sensitivity Detection of Sulfadiazine Using Green Silicon Quantum Dots Based Fluorescent Molecularly Imprinted Sensors 基于绿色硅量子点荧光分子印迹传感器的磺胺嘧啶高灵敏度检测新策略

4区工程技术

Polymers for Advanced Technologies Pub Date : 2025-02-01 DOI: 10.1002/pat.70108

Hongjie Lu, Xiaoqiang Chen, Wanzhen Xu, Wenming Yang, Weihong Huang

{"title":"A Novel Strategy for High‐Sensitivity Detection of Sulfadiazine Using Green Silicon Quantum Dots Based Fluorescent Molecularly Imprinted Sensors","authors":"Hongjie Lu, Xiaoqiang Chen, Wanzhen Xu, Wenming Yang, Weihong Huang","doi":"10.1002/pat.70108","DOIUrl":"https://doi.org/10.1002/pat.70108","url":null,"abstract":"ABSTRACT The issue of pharmaceutical residues in the environment has become increasingly severe, with the detection of sulfonamide antibiotics emerging as a research hotspot in environmental monitoring. Herein, we present a method for detecting sulfadiazine based on a silicon quantum dots (SiQDs)‐based fluorescent molecularly imprinted sensor. SiQDs, synthesized using an aqueous phase method, exhibit remarkable fluorescent properties, such as a broad excitation spectrum, tunable emission wavelengths, and high fluorescence stability, offering significant advantages in pharmaceutical detection. By integrating amino‐functionalized silica nanospheres (NH 2 ‐SiO 2 ) and tetraethyl orthosilicate, SiQDs were surface‐functionalized to construct SiQDs@NH 2 ‐SiO 2 @MIPs composite materials. The modified fluorescent molecularly imprinted polymers not only exhibited high selectivity and affinity for the target molecule SDZ, but also demonstrated excellent stability and resistance to interference in complex environments. Experimental results revealed that the sensor displayed a strong linear correlation within the concentration range of 40–100 μmol·L −1 , with a detection limit of 0.036 ng·mL −1 , demonstrating high sensitivity and excellent selectivity. In real sample applications, the recovery rate ranged from 97.88% to 100.74%, with a relative standard deviation of less than 5.37%. These findings emphasize the wide potential applications of this sensor, especially in water quality monitoring, environmental protection, and pharmaceutical detection.","PeriodicalId":20382,"journal":{"name":"Polymers for Advanced Technologies","volume":"36 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147919856","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}

引用次数: 3