Soft Materials最新文献_第6页

Turning a linear waterborne polyurethane into a crosslinked counterpart with improved water resistance and mechanical strength through a fast post metal-organic crosslinking 通过快速后金属有机交联，将线性水性聚氨酯转变为具有提高耐水性和机械强度的交联对应物

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-08-03 DOI: 10.1080/1539445X.2022.2108841

Guotong Du, Na Li, Qiwen Yong, Feng Jiang, Rui Wang, Yu-lin Li, Yao Xiao, Jinming Chang

{"title":"Turning a linear waterborne polyurethane into a crosslinked counterpart with improved water resistance and mechanical strength through a fast post metal-organic crosslinking","authors":"Guotong Du, Na Li, Qiwen Yong, Feng Jiang, Rui Wang, Yu-lin Li, Yao Xiao, Jinming Chang","doi":"10.1080/1539445X.2022.2108841","DOIUrl":"https://doi.org/10.1080/1539445X.2022.2108841","url":null,"abstract":"ABSTRACT Covalent crosslinking can improve the water resistance of waterborne polyurethanes (WPUs), but the preparation time of WPUs will be greatly extended by the crosslinking process, and the long-term storage stability of WPU emulsions will decrease because the crosslinked molecular chains cannot disperse in any organic solvents or water. In this paper, a crosslinked WPU was prepared through a post metal-organic crosslinking toward a conventional linear WPU. This post crosslinking is quite fast since it is based on the ionic bond interaction between metal cations and organic anions. The crosslinked WPU emulsion has narrow particle size distribution and small average size, giving rise to excellent long-term storage stability. Additionally, the water absorptions of the crosslinked WPU at 25°C and 60°C are 6.3% and 8.6% respectively, which decrease by 47.9% and 39.4% compared with those of the linear counterpart, indicating that the post metal-organic crosslinking highly improves the water resistance of the WPU. The mechanical strength of the crosslinked WPU also improves compared with the linear WPU.","PeriodicalId":22140,"journal":{"name":"Soft Materials","volume":"20 1","pages":"471 - 478"},"PeriodicalIF":1.2,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42283984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of graphene on the smectic-A to chiral smectic-C* phase transition 石墨烯对近距离A到手性近距离C*相变的影响

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-06-20 DOI: 10.1080/1539445X.2022.2082472

P. Mukherjee

引用次数: 1

Effects of corneal preservation on the mechanical response of porcine corneas measured by nano-indentation 角膜保存对纳米压痕法测定猪角膜力学响应的影响

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-06-05 DOI: 10.1080/1539445X.2022.2083160

Shima Bahramizadeh-Sajadi, H. Katoozian, J. Nohava, M. Ariza-Gracia, P. Büchler

{"title":"Effects of corneal preservation on the mechanical response of porcine corneas measured by nano-indentation","authors":"Shima Bahramizadeh-Sajadi, H. Katoozian, J. Nohava, M. Ariza-Gracia, P. Büchler","doi":"10.1080/1539445X.2022.2083160","DOIUrl":"https://doi.org/10.1080/1539445X.2022.2083160","url":null,"abstract":"ABSTRACT Although corneal biomechanics plays an important role in ophthalmology, its characterization remains limited due to tissue availability. This problem is particularly critical when studying specific pathologic conditions such as keratoconus. A preservation method that maintains the mechanical response of the tissue over time allows the collection, transport, and storage of tissue samples from different, distant clinical sites and increases the number of samples available for testing. Therefore, the aim of this study was to quantify the change in mechanical response of porcine corneas after 6 days of storage either at −20°C or in standard culture medium. The viscoelastic response of porcine corneas was measured at different loading rates by nano-indentation. While the loading rate had a significant effect on the mechanical response (p < .0001), the results showed that the mechanical response were not altered by any of the preservation methods (p > .270). However, the standard deviation was up to 4.9 times larger when the samples were stored in the culture medium compared to the fresh and frozen samples. In addition, storage in culture medium resulted in significant swelling (+38%). In conclusion, although both preservation techniques provide equivalent mechanical response measured by nano-indentation, freezing the samples prevents swelling and provides more stable measurements.","PeriodicalId":22140,"journal":{"name":"Soft Materials","volume":"20 1","pages":"461 - 470"},"PeriodicalIF":1.2,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45216217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biocompatible, stretchable, and compressible cellulose/MXene hydrogel for strain sensor and electromagnetic interference shielding 用于应变传感器和电磁干扰屏蔽的生物相容性，可拉伸和可压缩纤维素/MXene水凝胶

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-05-30 DOI: 10.1080/1539445X.2022.2081580

Yan Bai, Shuaihang Bi, Weikang Wang, N. Ding, Yuyuan Lu, Mengyue Jiang, Cheng Ding, Weiwei Zhao, N. Liu, Jing Bian, Shu-juan Liu, Qiang Zhao

{"title":"Biocompatible, stretchable, and compressible cellulose/MXene hydrogel for strain sensor and electromagnetic interference shielding","authors":"Yan Bai, Shuaihang Bi, Weikang Wang, N. Ding, Yuyuan Lu, Mengyue Jiang, Cheng Ding, Weiwei Zhao, N. Liu, Jing Bian, Shu-juan Liu, Qiang Zhao","doi":"10.1080/1539445X.2022.2081580","DOIUrl":"https://doi.org/10.1080/1539445X.2022.2081580","url":null,"abstract":"ABSTRACT With the booming growth of flexible human-computer interactions and telecommunications, it is desirable to fabricate a high-sensitivity strain sensor to monitor human movement and develop an electromagnetic interference (EMI) shielding materials to protect modern microelectronics and humans from electromagnetic damage. Herein, the biocompatible, stretchable, and compressible cellulose/MXene hydrogel has been prepared to first realize the dual-functional applications in strain sensor and EMI shielding. Two-dimensional MXene nanosheets serve as conductive sensing materials and fillers to construct conductive networks. The hydrogen bond interaction between them enhances the mechanical property of hydrogel. Benefiting from the excellent electrical conductivity and good mechanical property of the cellulose/MXene hydrogel, the resultant strain sensor displays excellent tensile strain (~144.4%), high sensitivity (gauge factor ~ -6.97), adjustable detection range (0-68.7%), fast response time (~100 ms), and great stability (~1000 cycles). It can monitor human motion, including pulse beating, speech recognition, writing sensing and pressure distribution induction of 4 × 4 sensor array platform. Moreover, the cellulose/MXene hydrogel presents an absorption-predominant EMI shielding performance in the frequency of X-band. This work provides a new inspiration for the development of multifunctional hydrogel in artificial intelligence, human-computer interaction, and EMI shielding technique.","PeriodicalId":22140,"journal":{"name":"Soft Materials","volume":"20 1","pages":"444 - 454"},"PeriodicalIF":1.2,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45641441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Lateral response of a layered material with interlayer friction 层间摩擦时层状材料的横向响应

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-05-09 DOI: 10.1080/1539445X.2022.2115514

Tomoki Sasada, Kento Yasuda, Yuto Hosaka, S. Komura

引用次数: 0

Accelerating molecular dynamics simulations by a hybrid molecular dynamics-continuum mechanical approach 用混合分子动力学-连续体力学方法加速分子动力学模拟

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-04-25 DOI: 10.1080/1539445X.2022.2061513

C. Bauer, M. Ries, S. Pfaller

引用次数: 2

pH modulating agar dressing for chronic wounds 用于慢性伤口的pH调节琼脂敷料

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-03-25 DOI: 10.1080/1539445X.2022.2049308

Suhela Tyeb, N. Kumar, Gorbel B, Ajay Kumar, Vivek Verma

{"title":"pH modulating agar dressing for chronic wounds","authors":"Suhela Tyeb, N. Kumar, Gorbel B, Ajay Kumar, Vivek Verma","doi":"10.1080/1539445X.2022.2049308","DOIUrl":"https://doi.org/10.1080/1539445X.2022.2049308","url":null,"abstract":"ABSTRACT Microenvironment of majority chronic wounds exhibits pH in the range of 7.5 to 8.5, leading to poor healing prognosis. The elevated pH adds to dysregulation of healing cascade by creating hypoxia, elevating matrix metalloproteinase (MMP) activity and chances of infection. The current work focuses on fabrication of pH regulating agar-citric acid bi-layer dressing for effective management of chronic wounds. The desired pH in the range of 6 to 7 was achieved by unidirectional release of citric acid through bi-layer arrangement of agar-citric acid films in contact with wound simulating fluid of pH ~ 8.5. At lower pH (6.5), both MMP 9 and MMP 2 degraded lesser gelatin (0.11 µg/mg ± 0.003 µg/mg) as compared to higher pH (8.5) value (0.18 µg/mg ± 0.004 µg/mg). The dressing also exhibited bacteriostatic effect on Staphylococcus aureus and Pseudomonas aeruginosa bacteria cultured in-vitro. The bilayer dressing exhibited an average tensile strength of 27 MPa ± 2.5 MPa along with 52 ± 5% elongation at break. The percentage swelling and water vapor transmission rate of dressing was 112% ± 20% and 2156 g/m2/day ± 128 g/m2/day respectively.","PeriodicalId":22140,"journal":{"name":"Soft Materials","volume":"20 1","pages":"379 - 393"},"PeriodicalIF":1.2,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46392752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Investigation on metal coordination crosslinking nitrile butadiene rubber induced by the synergistic effect between tetramethylthiuram disulfide and cupric sulfate 二硫化四甲基秋兰姆与硫酸铜协同作用引发金属配位交联丁腈橡胶的研究

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-03-22 DOI: 10.1080/1539445X.2022.2054822

Jiahao Li, Xun Lu, Q. Bai, Zhaobo Wang

{"title":"Investigation on metal coordination crosslinking nitrile butadiene rubber induced by the synergistic effect between tetramethylthiuram disulfide and cupric sulfate","authors":"Jiahao Li, Xun Lu, Q. Bai, Zhaobo Wang","doi":"10.1080/1539445X.2022.2054822","DOIUrl":"https://doi.org/10.1080/1539445X.2022.2054822","url":null,"abstract":"ABSTRACT In this work, we described a simple method to manufacture a novel nitrile butadiene rubber (NBR) filled with cupric sulfate (CuSO4) and tetramethylthiuram disulfide (TMTD) via simple mixing and heat pressing. Cure characteristics analysis, the motion capability of polymer segments, physical properties, micromorphology, swelling properties and dynamic characteristics were explored comprehensively. The results demonstrated that the three-dimensional network was cross-linked by the metal coordination interactions between the nitrile group and copper ion. The cure curve, tensile strength and crosslinking density exhibited a considerable increasing with the addition of TMTD in NBR/CuSO4 compounds, which was due to the synergistic effect between Cu2+ and Me2NCSn• (n = 1–2) radicals generated by the pyrolysis of TMTD, resulting in the formation of the hyperactive compounds [Cu(SnCNMe2)]•2+ and promoting the coordination crosslinking between -CN and Cu2+ significantly. The NBR/CuSO4/TMTD vulcanizates induced by the synergistic effect would play a crucial role in practical application for the excellent physical properties.","PeriodicalId":22140,"journal":{"name":"Soft Materials","volume":"20 1","pages":"414 - 427"},"PeriodicalIF":1.2,"publicationDate":"2022-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44540386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

C 3-symmetric truxene discotic liquid crystals with mixed ether chains: synthesis, mesomorphism, and self-assembly properties 具有混合醚链的C3对称辉石盘状液晶：合成、介晶性和自组装性质

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-03-21 DOI: 10.1080/1539445X.2022.2053542

Xiao-Peng Cheng, Xiaoting Xiong, Jianggang He, Wenhao Yu, C. Feng, Hai-liang Ni, P. Hu

{"title":"C 3-symmetric truxene discotic liquid crystals with mixed ether chains: synthesis, mesomorphism, and self-assembly properties","authors":"Xiao-Peng Cheng, Xiaoting Xiong, Jianggang He, Wenhao Yu, C. Feng, Hai-liang Ni, P. Hu","doi":"10.1080/1539445X.2022.2053542","DOIUrl":"https://doi.org/10.1080/1539445X.2022.2053542","url":null,"abstract":"ABSTRACT Nine new C3-symmetric 2,7,12-tris(decanoxy)-3,8,13-tris(alkoxy)truxene discogens were synthesized, and all exhibited only one three-dimensionally ordered hexagonal columnar mesophase with a wide mesogenic temperature range, as characterized by polarizing optical microscopy, differential scanning calorimetry, and X-ray diffractometry. Crucially, as the length of the alkoxy chain increased, the melting points first increased and then decreased, and, at the same time, the temperatures of the clearing point decreased gradually. In addition, these compounds were found to be highly thermally stable, having decomposition temperatures occurring well above 350°C, as determined by thermogravimetric analysis. The self-assembly behaviors in solution were studied using variable-concentration 1H-NMR, revealing that the truxenes self-aggregated in solution via the π–π facial interactions of the polycyclic aromatic units, and scanning tunneling microscopy results revealed that one of the discotic liquid crystal compounds periodically assembled in a hexagonal geometry at the liquid–solid interface of highly oriented pyrolytic graphite.","PeriodicalId":22140,"journal":{"name":"Soft Materials","volume":"20 1","pages":"394 - 404"},"PeriodicalIF":1.2,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49570493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Tryptophan capped gold-aryl nanoparticles for energy transfer study with SARS-CoV-2 spike proteins 色氨酸覆盖金芳基纳米颗粒与SARS-CoV-2刺突蛋白的能量转移研究

IF 1.2 4区材料科学

Soft Materials Pub Date : 2022-03-14 DOI: 10.1080/1539445X.2022.2053543

Javad B. M. Parambath, S. Kanan, Ahmed Abouzeed Mohamed

引用次数: 2