e-Polymers最新文献_第10页

Investigation of MXene-modified agar/polyurethane hydrogel elastomeric repair materials with tunable water absorption MXene改性琼脂/聚氨酯水凝胶弹性体可调吸水性修复材料的研究

IF 3.7 3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0035

Jinbo Liu, Xue-zhi Tang, Xiaotong Chen, Guoqing Wang

{"title":"Investigation of MXene-modified agar/polyurethane hydrogel elastomeric repair materials with tunable water absorption","authors":"Jinbo Liu, Xue-zhi Tang, Xiaotong Chen, Guoqing Wang","doi":"10.1515/epoly-2023-0035","DOIUrl":"https://doi.org/10.1515/epoly-2023-0035","url":null,"abstract":"Abstract The study of repairing materials is of paramount importance, considering that damage during usage can significantly impact performance and bring inconvenience during maintenance work. One highly sought-after material is water-swellable elastomers, known for their effect in sealing and repairing damaged materials. In this study, agar/polyurethane dual-network hydrogel elastomers were prepared, which were further modified by MXene. The material exhibits a uniform and flat surface, along with a rich pore-filled internal structure. It showcases excellent thermal stability, good tensile strength retention, and a controllable low swelling rate (SR) upon water absorption. The performance of the material can be regulated by the MXene content. In addition, the “water absorption–drying–water absorption” cycle effectively controls the reduction of the SR and gradually increases the tensile strength. All samples demonstrated exceptional photothermal conversion efficiency, stability, and durability, with the maximum conversion temperature increasing with the MXene content. The scratch repair experiments demonstrated the remarkable potential of these materials for photothermal conversion-assisted repair. These materials can be adapted as auxiliary restoration materials in water bodies and various application environments, making them ideal for repair and restoration purposes.","PeriodicalId":11806,"journal":{"name":"e-Polymers","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46236802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fiber-reinforced polyvinyl alcohol hydrogel via in situ fiber formation 纤维增强聚乙烯醇水凝胶的原位纤维形成

IF 3.7 3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0056

Zheng Guo, Zebo Wang, Wei-Ying Pan, Jintao Zhang, Yu Qi, Yajie Qin, Yi Zhang

引用次数: 0

Effect of different tin neodecanoate and calcium–zinc heat stabilizers on the thermal stability of PVC 不同新癸酸锡和钙锌热稳定剂对PVC热稳定性的影响

IF 3.7 3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0029

Xiang Wang, Chao Di, Tingwei Wang

引用次数: 0

Tribological characterization of sponge gourd outer skin fiber-reinforced epoxy composite with Tamarindus indica seed filler addition using the Box–Behnken method Box-Behnken法研究了绢毛猴种子填料对海绵葫芦外皮纤维增强环氧复合材料的摩擦学特性

3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0052

Felix Sahayaraj Arockiasamy, Mayakrishnan Muthukrishnan, Jenish Iyyadurai, Seeniappan Kaliappan, Natrayan Lakshmaiya, Sinouvassane Djearamane, Lai-Hock Tey, Ling Shing Wong, Saminathan Kayarohanam, Sami Al Obaid, Saleh Alfarraj, Subpiramaniyam Sivakumar

{"title":"Tribological characterization of sponge gourd outer skin fiber-reinforced epoxy composite with Tamarindus indica seed filler addition using the Box–Behnken method","authors":"Felix Sahayaraj Arockiasamy, Mayakrishnan Muthukrishnan, Jenish Iyyadurai, Seeniappan Kaliappan, Natrayan Lakshmaiya, Sinouvassane Djearamane, Lai-Hock Tey, Ling Shing Wong, Saminathan Kayarohanam, Sami Al Obaid, Saleh Alfarraj, Subpiramaniyam Sivakumar","doi":"10.1515/epoly-2023-0052","DOIUrl":"https://doi.org/10.1515/epoly-2023-0052","url":null,"abstract":"Abstract The tribological properties of the sponge gourd outer skin fiber (SGOSF)-reinforced epoxy composites filled with tamarind seed powder were investigated using a pin-on-disc dry sliding wear testing machine. The fiber and filler contents were kept constant (30 and 7.5 wt%). The fibers were treated with sodium hydroxide (NaOH), which increases the bonding strength that has been identified by scanning electron microscope (SEM). A filler content of 7.5 wt% has better hardness due to the embedment of filler with treated fiber and epoxy. Therefore, the SGOSFs/epoxy with 7.5 wt% tamarind filler was chosen for the study of tribological characterization. The lowest specific wear rate of 2.565 × 10 −4 mm 3 ·N m −1 was obtained using the design of expert optimization technique for the control factors such as a load of 44.99 N, a sliding distance of 1,701.39 m, and a sliding velocity of 3.36 m·s −1 using a ramp plot at the desirable level of 1. For the gripping material application, the highest coefficient of friction value of 0.51 was obtained by maintaining the specified input parameters, such as a load of 42.15 N, a sliding distance of 1,874.86 m, and a sliding velocity of 4.99 m·s −1 using a ramp plot at the desirable level of 0.927. SEM images were used to investigate the failure mechanism of the worn surfaces, which substantiates the failure of the pure matrix layer on the surface even at low load, followed by the formation of a rarely breakable adhesive layer.","PeriodicalId":11806,"journal":{"name":"e-Polymers","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135662687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of natural Indocalamus leaf addition on the mechanical properties of epoxy and epoxy-carbon fiber composites 天然竹叶添加量对环氧树脂及环氧-碳纤维复合材料力学性能的影响

3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0039

Jiaan Liu, Sijian Lu, Xinjing Liu, Bo Wang, Zerun Yu, Chaojie Che

引用次数: 0

Melt-blended PLA/curcumin-cross-linked polyurethane film for enhanced UV-shielding ability 熔融混合PLA/姜黄素交联聚氨酯膜增强紫外线屏蔽能力

IF 3.7 3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0009

Xuya Fu, Tao Zhang, Wenshuo Zhang, Yuye Zhong, Shuliang Fang, Guannan Wang, Y. Li, Yajun Deng, Xinghai Liu, Houbin Li

{"title":"Melt-blended PLA/curcumin-cross-linked polyurethane film for enhanced UV-shielding ability","authors":"Xuya Fu, Tao Zhang, Wenshuo Zhang, Yuye Zhong, Shuliang Fang, Guannan Wang, Y. Li, Yajun Deng, Xinghai Liu, Houbin Li","doi":"10.1515/epoly-2023-0009","DOIUrl":"https://doi.org/10.1515/epoly-2023-0009","url":null,"abstract":"Abstract Biomass films with ultraviolet (UV)-shielding ability have attracted considerable attention. Curcumin was introduced into castor oil-based polyurethane (CCPU) as a chain extender, which was melt with polylactic acid (PLA) as a reinforcement to obtain biomass UV-shielding film. The excellent UV absorption and antioxidant qualities of curcumin contributed to the impressive UV-shielding capacity (97.6% UV radiation absorption) and antioxidant (51% free radical scavenging) of PLA/CCPU-20 film. In the scanning electron microscopic images of film fracture, the mixing of CCPU elastomer into the PLA matrix caused the blend films to exhibit significant toughening fracture characteristics compared to the pure PLA film. The excellent thermal stability, low water swelling degree, and low water solubility of PLA/CCPU blend films were maintained after CCPU was added to the PLA matrix. Therefore, the PLA/CCPU blend films can be considered as a potential packaging material because of its favorable UV-shielding properties and film stability. Graphical abstract Schematic for the preparation of the PLA/CCPU blend films.","PeriodicalId":11806,"journal":{"name":"e-Polymers","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42375149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Enzyme-catalyzed synthesis of 4-methylcatechol oligomer and preliminary evaluations as stabilizing agent in polypropylene 酶催化4-甲基儿茶酚低聚物的合成及其作为聚丙烯稳定剂的初步评价

IF 3.7 3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0008

Yanpeng Wang, Fan Jiang, Lei Zhang

引用次数: 1

Pineapple fruit residue-based nanofibre composites: Preparation and characterizations 菠萝果渣基纳米纤维复合材料:制备与表征

IF 3.7 3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0094

Sajithkumar K. Jayaprakash, Suchith Chellappan, Sruthi A. Prasannan, V. Padil

{"title":"Pineapple fruit residue-based nanofibre composites: Preparation and characterizations","authors":"Sajithkumar K. Jayaprakash, Suchith Chellappan, Sruthi A. Prasannan, V. Padil","doi":"10.1515/epoly-2023-0094","DOIUrl":"https://doi.org/10.1515/epoly-2023-0094","url":null,"abstract":"Abstract Natural fibre composites are widespread for being eco-friendly and having unique properties. This study prepared nanocomposites by water evaporation using cellulose nanofibres (CNFs) as fillers and natural rubber (NR) latex as the matrix. Here, CNFs were extracted from the “pineapple fruit residue,” a waste material in juice industries. These fibre-reinforced nanocomposites were prepared under three different weight/volume percentages (5%, 10%, and 15%) and analysed for their mechanical and thermal properties. Furthermore, the morphology and distribution of CNFs in the NR matrix were examined by scanning electron microscopy and Fourier transform-infrared (FT-IR) analysis. The study found that CNFs were randomly oriented and evenly distributed in the nanocomposite. CNFs were detected by FT-IR spectroscopy in the NR matrix, as indicated by absorption peaks at 1,033 and 1,057 cm−1. Thermogravimetric analysis reveals increased thermal stability with more CNFs. Tensile strength and elastic modulus also increase. Pineapple fruit residue-based CNFs enhance mechanical and thermal properties of NR composites and can be considered an ideal natural reinforcing material.","PeriodicalId":11806,"journal":{"name":"e-Polymers","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49017837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on wall-slipping mechanism of nano-injection polymer under the constant temperature fields 恒温场下纳米注入聚合物的滑壁机理研究

3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0085

Donglei Liu, Riqing Chen, Kai Zhan, Zizhi Chen, Xin Luo

{"title":"Study on wall-slipping mechanism of nano-injection polymer under the constant temperature fields","authors":"Donglei Liu, Riqing Chen, Kai Zhan, Zizhi Chen, Xin Luo","doi":"10.1515/epoly-2023-0085","DOIUrl":"https://doi.org/10.1515/epoly-2023-0085","url":null,"abstract":"Abstract Polyphenylene sulfide (PPS) and copper (Cu) were used as the polymer and substrate material to simulate the nano-injection molding process by molecular dynamics method. The results show that the PPS chain obeys Einstein’s diffusion law in the early stage of injection molding then deviates from it in the late stage due to the entanglement and limitation of surrounding nanoparticles. In addition, the process of conformational isomerization of polymer chains is accompanied by the twisting and stretching of fixed chains. There are two kinds of adhesion phenomena, one is the macromolecular slides violently in small areas of some sure nanoscale groove to form multiple anchor points. The other case involves multiple nano-grooves along the metal interface, the polymer chain slides and is bolted as multiple anchors in different grooves due to the exerted wall-drag effect on the neighboring chains. These two slipping and anchoring mechanisms are consistent with de Gennes’ slipping theory. Through the quantitative analysis of the influence of pressure on injection filling, it is found that injection pressure should be kept within a certain range to achieve the positive effect of molding.","PeriodicalId":11806,"journal":{"name":"e-Polymers","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135058054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of citric acid on thermal, phase morphological, and mechanical properties of poly(l-lactide)-b-poly(ethylene glycol)-b-poly(l-lactide)/thermoplastic starch blends 柠檬酸对聚l-丙交酯-b-聚乙二醇-b-聚l-丙交酯/热塑性淀粉共混物热、相形态和力学性能的影响

3区化学

e-Polymers Pub Date : 2023-01-01 DOI: 10.1515/epoly-2023-0057

Yaowalak Srisuwan, Prasong Srihanam, Theeraphol Phromsopha, Yodthong Baimark

{"title":"Effect of citric acid on thermal, phase morphological, and mechanical properties of poly(l-lactide)-b-poly(ethylene glycol)-b-poly(l-lactide)/thermoplastic starch blends","authors":"Yaowalak Srisuwan, Prasong Srihanam, Theeraphol Phromsopha, Yodthong Baimark","doi":"10.1515/epoly-2023-0057","DOIUrl":"https://doi.org/10.1515/epoly-2023-0057","url":null,"abstract":"Abstract This work investigated the thermal, morphological, and tensile properties of poly( l -lactide)- b -poly(ethylene glycol)- b -poly( l -lactide) (PLLA-PEG-PLLA)/thermoplastic starch (TPS) blends with 3 wt% citric acid (CA) treatment of TPS. The blends with PLLA-PEG-PLLA/CA-TPS ratios of 100/0, 90/10, 80/20, and 60/40 (w/w) were investigated and compared with PLLA-PEG-PLLA/CA-free TPS blends. Crystallizability of the blends decreased and thermal stability increased as the TPS content increased. The thermal stability of the blends was found to improve after CA treatment of TPS. The PLLA-PEG-PLLA/CA-TPS blends showed better phase compatibility than those of the PLLA-PEG-PLLA/CA-free TPS blends. The tensile properties of the blends were improved by CA treatment of TPS. In conclusion, improvement in thermal stability, phase compatibility, and tensile properties of the PLLA-PEG-PLLA/TPS blends was obtained by CA treatment of TPS. The resulting PLLA-PEG-PLLA/CA-TPS blends could potentially be used to prepare biodegradable and flexible bioplastics.","PeriodicalId":11806,"journal":{"name":"e-Polymers","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135157128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0