CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Yuling Lü,Ce Wang,Yulong Ma,Tianxu Ye,Limin He
The weak adhesion between oil droplets and bubbles frequently reduces the flotation effectiveness of oil removal. This study focuses on the hydrophobic and oleophilic modification of bubble surfaces by encapsulating light hydrocarbon homologue-condensate to address this issue. The adhesion properties were characterized by the surface properties and interaction barriers of oil droplets and air/ condensate bubbles. The results indicated that condensate bubbles exhibited shorter induction time and faster spreading rate than air bubbles when adhering to oil droplets. The condensate film effectively extracted the oil droplets and completely enveloped the bubble surface. Furthermore, the non-DLVO model best fitted bubble induction time, revealing negative interaction energy barriers that promoted adhesion between condensate bubbles and oil droplets. In summary, coating a condensate film on bubble surfaces enhances the adhesion effect on oil droplets, which research provides valuable theoretical guidance for applying condensate bubble flotation process.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of the Australian Ceramic Society
·
2023
·Vol. 59
·期 4
·915-922
·
IF 1.9
Zhang Jianxiong
ZrO 2 is widely used. However, surface hydrophilicity is harmful to waterproof devices. In this work, epoxy-based polyhedral oligomeric silsesquioxane (POSS) was chemically bonded to ZrO 2 sheet surface for weather-resistant hydrophobicity and anti-adherence property. First, ZrO 2 sheet was modified with hydroxyls, followed by amino modification. Then, surface POSS modification was performed via ring-opening addition. Next, composition and micro-morphology of POSS-treated sheet were clarified. Ultimately, the dependence of water contact angle of POSS-modified sheet on POSS solution treating time was researched, and the highest contact angle of 132.6° was gained by 24-h treating. Acid corrosion, alkali corrosion, and ultraviolet radiation for 48 h were employed to verify good weather resistance with contact angles over 120°. POSS-modified sheet had good anti-adherence capacity. Cooperation of POSS and ZrO 2 was utilized to obtain low surface energy and high surface roughness. This work might help to obtain hydrophobic ceramics as catalyst supports for oil-phase reactions.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 9
·4320-4327
·
IF 2.302
Dai Fei,Chen Feng,Wang Tao,Feng Shaoguang,Hu Chunlin,Wang Xinling,Zheng Zhen
Epoxy adhesive as an engineering material has more and more applications in industry. But to date, water resistance of the adhesive is still a very difficult problem to be solved. By mimicking mussel adhesive proteins, dopamine (DA) was applied as one of the two curing agents of epoxy adhesive to improve the water resistance of the adhesive, and the other was phenethylamine (PEA). The effects of the contents of DA on both adhesion property and water absorption of epoxy/PEA/DA adhesives were investigated in detail. The results of lap shear test (LST) showed that the adhesion strength of the epoxy adhesives after the introduction of proper amount of DA was still up to 7 MPa even after the sample was immersed in water for over 230 days. And then the effects of metal ions Zn(II) and Fe(III) on the adhesion properties of the epoxy adhesives were also further studied. It was found that the adhesion strength of the adhesives, when the content of DA was no more than 5 wt%, can be further increased through the complexation of a small quantity of ferric ions with DA. The coordination mechanism of catechol with Fe(III) ions in the system has been investigated by both UV/Vis spectra and XRD curves. The results testified that more bis-catecholate complexes form at high DA: Fe ratios and thus the adhesives have higher cohesion strength for having more regular structures after curing. In a word, the introductions of proper amount of DA and metal ion endow the epoxy adhesive better water resistance and excellent adhesion properties.
研究领域:
材料科学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2024
·Vol. 37
·期 1
·04024444
·
IF 3.1
Xing Gong,Quantao Liu,Yingxue Zou,Xuefei Liu,Huan Wang,Pei Wan,Zhilong Cao,Shaopeng Wu
The poor adhesion of asphalt–granite limits the application of granite. This research aims to enhance the adhesion of asphalt and granite by establishing chemical connections between the hydroxyl groups on granite surface and the incompletely reacted isocyanate groups in polyurethane (PU) modified asphalt. For this purpose, end-capped PU modified asphalt (PUMA) was prepared, the adhesion mechanism between PUMA and granite was analyzed by Raman spectroscopy, the adhesion properties between PUMA and granite at different curing periods were evaluated by boiling and pull-out tests, and the wettability of PUMA on granite and its moisture sensitivity were evaluated using surface free energy (SFE) method. The findings suggested that the incompletely reacted isocyanate groups in PUMA can establish a chemical connection with the hydroxyl groups on the surface of granite. The adhesion between asphalt and granite can be greatly improved by the addition of PU, and this improvement is amplified as the curing time is extended. When the curing time is extended to 3 days, the fracture mode between asphalt and granite changed from adhesive failure to cohesive failure, and after 15 days of curing, the coating ratio of PUMA on granite following the water boiling test can be raised by 28.11% in comparison to the base asphalt. The water damage resistance of PUMA-granite system can be increased by adding PU and the adhesion work and combination ratio of the freshly prepared PUMA were increased by 55.91% and 79.45%, respectively, as compared to base asphalt. This study has great significance for enhancing the adhesion between asphalt and granite and encouraging granite application.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xin Liu,Qin Zhang,Zijian Gao,Ruibin Hou,Guanghui Gao
Bioinspired strategies have drawn much attention for designing intelligent hydrogels with promising performance. Herein, we present a bioinspired adhesive hydrogel driven by adenine and thymine, which are the basic units of DNA. The adhesive hydrogel exhibited promising adhesive property for the surface of various solid materials, including muscle tissues, plastics, rubbers, glasses, metals, ceramics, carnelians, and woods. The maximum peeling strength of hydrogels was 330 N m–1 on aluminum, superior to that of PAAm hydrogels with 70 N m–1. The strong adhesive behavior remained more than 30 times repeated peeling tests. Moreover, the swelling behavior, morphological structure, mechanical strength, and peeling adhesive strength were also investigated and confirmed the formation and various characteristics of adhesive hydrogels driven by adenine and thymine. Thus, the biomimetic strategy to design promising adhesive hydrogels can provide various opportunities in tissue engineering, such as wound dressing, bioglues, and tissue adhesives.
研究领域:
生物材料学
·
组织工程学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemical Science
·
2023
·Vol. 14
·期 14
·3938-3948
·
IF 8.4
Zhi Dong,Jiang Wu,Xinyi Shen,Zan Hua,Guangming Liu
Supramolecular polymeric adhesives inspired by nature have been strongly pursued by scientists, since they possess strong but dynamic reversible adhesive behaviors concurrently. Optimizing the adhesive and cohesive properties is of vital importance for the fabrication of strong supramolecular polymeric adhesives, but common strategies often strengthen one property at the expense of another. Herein, counterion exchange of nucleobase-containing polyelectrolyte adhesives was utilized to boost the interfacial adhesion without compromising the intermolecular cohesion, achieving high adhesion strengths. By employing the cationic polyelectrolyte poly(3-acrylamidopropyltrimethylammonium chloride), the slightly enhanced intermolecular cohesion of the polyelectrolyte with hydrophobic sulfonates is capable of enhancing the adhesion strength. Intriguingly, by introducing bioinspired complementary nucleobases within adhesives, the loss of interfacial adhesion was observed for adhesives containing high supramolecular hydrogen-bonding crosslinking densities. By optimizing the cohesive and adhesive properties of nucleobase-containing polyelectrolyte adhesives using sulfonates with suitable chain lengths, 60 to 250 times improvement of adhesion strengths can be attained over that of initial supramolecular polymeric adhesives. Additionally, nucleobase-containing supramolecular polymeric adhesives tolerate different external conditions, maintaining robust adhesion strengths. This work offers us an efficient and feasible way to optimize the cohesive and adhesive properties for constructing robust and tunable supramolecular adhesives.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Ran Zong,Xinli Hu,Shuangyi Liu,Aosheng Zhong,Baoqing Shentu
Aiming to satisfy the requirements of pressure-sensitive adhesives (PSAs) for flexible displays, 2-[[[6-[3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)ureido]hexyl]carbamoyl] oxy]ethyl acrylate (Upy-HDI-HEA) was synthesized, and a series of dual cross-linking EHA-co-HEA copolymers with multiple hydrogen bonds were prepared. The effects of the Upy-HDI-HEA content on the EHA-co-HEA copolymers’ chemical structure, thermal properties, viscoelasticity, mechanical properties, and adhesion performance were comprehensively investigated via in situ Fourier transform infrared (FT-IR), differential scanning calorimetry (DSC), mechanical testing, and adhesion testing. The multiple hydrogen bonds acting as strong physical cross-linking enhance the deformation resistance of EHA-co-HEA copolymers. Moreover, compared to chemical cross-linking, the multiple hydrogen bonds allow for a certain degree of unhindered movement and energy dissipation, which benefits the flexibility and peel resistance of EHA-co-HEA copolymers. Consequently, relatively low storage moduli and glass transition temperatures were observed in all EHA-co-HEA copolymers. Young’s modulus, recovery rate, and cyclic stability of EHA-co-HEA copolymers increase with the rising Upy-HDI-HEA content. Also, the loop tack, 180° peel strength, and shear strength of EHA-co-HEA copolymers significantly improved, showing a better adhesion performance than commercial PSAs.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2024
·
IF 2.9
Shilong Zhang,Youhao Xiong,Yangwei Wang,Yuqi Ma,Jialiang Li,Chaobo Jiang,Ce Wang,Yanling Zhu,Yongsheng Zhao,Guangcheng Zhang
Polyurea (PU) elastomers have attracted considerable attention in the field of protective polymeric coatings. In this work, a dithiol-terminated boronic ester was synthesized and used to incorporate dynamic boron–oxygen (B–O) bonds in the PU main chain based on thiol isocyanate while amino-terminated polydimethylsiloxane (PDMS) was introduced to retain good chain flexibility. The modified PU elastomer was found to have a microphase-separated structure in which the hard blocks served as physical crosslinks. The glass transition temperature ( T g ) slightly increases when dynamic B–O bonds exist while further introduction of PDMS soft segment can lower T g to −55.63 °C. The introduction of dynamic B–O bonds and diminished hydrogen bonding led to a decrease in mechanical strength and elongation at break. Interestingly, the simultaneous incorporation of PDMS and dynamic B–O bonds is favorable for strain rate dependence and suppressing stress relaxation. The potential for bond-exchange interactions between the dynamic B–O bonds and hydroxyl groups on metal surfaces substantially improved the adhesion of the PU elastomer to metal substrates. Therefore, our work can offer valuable insights for the structural design of functional PU coatings tailored for anti-impact applications. © 2024 Society of Chemical Industry.
研究领域:
材料科学
·
聚合物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Qihai Wang,Zhifeng Luo,Xiaoli Ren,Haoran Fu,Quan Zhou,Keyou Chen,Shenwen Fang
Adhesive hydrogels frequently demonstrate poor mechanical properties; therefore, it is still challenging to integrate excellent adhesiveness and self-healing properties in one hydrogel. In this work, adenine and thymine were modified by grafting double bonds and then introduced into the structure of the polyacrylamide gel together with N, N′-methylene bisacrylamide (MBA) using a hybrid crosslinking strategy, and then a series of hybrid cross-linked hydrogels with adhesiveness and self-healing properties were successfully prepared. The hybrid crosslinking hydrogel exhibited a tunable adhesive performance and strength, by varying the content of base pairs, monomer concentration, cross-linker concentration, and initiator concentration. The recommended synthesis conditions for the P(AM-mAT) hydrogel were as follows: mA-mT concentration of the total monomer weight 5 wt%, total monomer concentration of 25 wt%, crosslinker (MBA) concentration of 0.5 wt%, and initiator APS concentration of 1.25 wt%. Under optimal conditions, the gel synthesized showed a hardness of 282 g and an adhesive force of 154.5 g. This hydrogel material exhibited excellent adhesion properties to materials such as plastics, glass, metals, and wood, with the best adhesion observed on glass.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuxian Xing,Yi Wei,Chongxiao Ge,Rui Hu,Yaqiong Zhang,Baoxia Wang,Zhiqiang Wang,Feng Jiang
With increasing environmental awareness and the pursuit of sustainable development goals, environmentally friendly sustainable thermoplastic elastomers (TPEs) derived from natural resources are highly desired to replace traditional TPEs. However, preparing sustainable TPEs with high mechanical properties and multifunctionality from biobased feedstocks remains a significant challenge. In this work, a series of chitin- graft -poly(acrylamide- co -2-ethylhexyl acrylate) (Chitin- g -P(AM- co -EHA)) copolymers were synthesized through reversible addition-fragmentation chain transfer (RAFT) polymerization. The tensile strength of Chitin- g -P(AM- co -EHA) copolymers can be tuned over a wide range from 1.0 to 7.3 MPa by adjusting the chitin and PAM contents. Benefiting from the brush-like architecture, Chitin- g -P(AM- co -EHA) copolymer exhibits improved mechanical properties over its linear counterparts. Moreover, these Chitin- g -P(AM- co -EHA) copolymers show good adhesion performance on different substrates. The shear strength can achieve 7.5 MPa for Chitin0.8-PAM50, which is high enough for commercial applications. The combination of chitin and grafting strategy can promote the development of strong chitin-based sustainable elastomers. This approach can be further utilized to design novel high-performance biobased elastomers and adhesives derived from natural resources.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Xiaoyong Zhang,Fan Li,Zhaozhao Li,Yongping Bai
Emerging conductive hydrogels showcase profound potential for sophisticated manipulation and various sensing applications. However, it is still challenging to prepare conductive hydrogel materials with the integration of mechanically tough, reliable healability, and high adhesion strength for skin comfort. Inspired by the robust adhesive mechanisms of mussel proteins, we present an innovative adhesive hydrogel (PVA-DBA) with exceptional adhesive properties, elasticity, and self-healing capability, achieved through the integration of PVA-DOPA copolymer and Fe³⁺ ions within a PAM-PAA hydrogel. The DOPA groups confer strong interfacial adhesion, yielding an adhesion strength of 63.0 kPa on porcine skin (simulate human skin) under ambient conditions, with repeatable use across 6 cycles without residual interfacial traces. The catechol-carboxyl interactions, enhanced by Fe³⁺ coordination, impart the hydrogel with high tensile strength, stretchability, and toughness while accelerating gelation kinetics. The unique structural composition provides multiple functional groups (-NH₂, -COOH, and catechol), collectively reinforcing mechanical stability and self-healing performance, achieving an impressive strain self-repair rate of 81.2%. The resultant PVA-DBA hydrogel demonstrates both mechanical robustness and adhesive functionality, along with sensitive conductivity, making it highly suitable for integration into sensing devices that detect bodily motions such as finger, elbow, and knee bending, with a response time of 400 ms. Furthermore, this hydrogel shows potential in sports applications, effectively recording stretching and bending movements, marking a significant advancement in the development of intelligent and responsive material systems.
研究领域:
材料科学
·
生物医学工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Chang-An Xu,Zhencai Qu,Mangeng Lu,Huifa Meng,Yingjie Zhan,Bing Chen,Kun Wu,Jun Shi
Although polyurethane pressure-sensitive adhesives (PSAs) have been widely used, there are still some deficiencies in adhesion and heat resistance . To make up for these shortcomings, rosin is introduced into polyurethane/polysiloxane copolymer to improve its heat resistance and adhesion, while its hydrophobicity is also improved. The vinyl-terminated polyurethane/polysiloxane copolymer is synthesized by a one-pot polymerization method, and finally PSA with different content of rosin is obtained by UV radiation . The effects of rosin on heat resistance, hydrophobicity, viscoelasticity , adhesion and antibacterial of PSA have been studied. The results show that the heat resistance index, the contact angle and the peel strength of PSA are increased by 4%, 31 % and 88 % respectively when rosin content is 6 wt%. In addition, the storage modulus and loss modulus of PSAs enhance with the increase of frequency, and the storage modulus of PSAs is always higher than the loss modulus. All PSAs have good antibacterial properties, with an antibacterial rate above 99.2 %. This will help expand the application of polyurethane/polysiloxane PSA such as food packaging materials.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）