EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Qingming Kong,Longfei Guo,Kaiqiang Zhang
Tough polyamides are crucial materials useful in many fields such as water purification and automobiles. Here we present a synergistic strategy to toughen polyamides by mechanistic interplays between aliphatic and aromatic supramolecular segments. The aliphatic monomer of adipic acid dihydrazide (ADH) and the aromatic monomer of 4,4′-oxydianiline (ODA) were subjected to low-temperature solution polycondensation with terephthaloyl chloride to synthesize tough aromatic–aliphatic polyamides in one step. Tailoring the mismatched supramolecular interactions between ADH and ODA segments enabled the precise control on the crystallinity, microphase separation structure and energy dissipation ability of the polymers. By varying the ratio of ADH segments to ODA segments, we obtained the optimal aromatic–aliphatic polyamides with high strength (ultimate engineering stress, 43.3 MPa), high toughness (31.2 MJ m −3 ) and remarkable solvent resistance due to the reliable supramolecular crosslinks. This synergistic toughening strategy is potentially useful to guide the design and development of strong and tough polymeric materials.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Suo Wang,Yuan Ma,Yao Li,Xuan Ji,Xu Fei,Longquan Xu,Yi Wang,Jing Tian
It is still a challenge to design a supramolecular interaction system for immobilizing enzymes efficiently and stably. In this work, inspired by octopus suckers, we used cyclodextrin with a similar structure to the octopus sucker cavity as supramolecular interaction functional units of soft tentacles to immobilize lipase through physical adsorption . By modifying the surface of cyclodextrin with polar hydrophilic groups, the difference in hydrophilic and hydrophobic properties and stability within the molecule were effectively improved, thereby enhancing the cavity suction of cyclodextrin. The enzyme load of the soft tentacles reached 10 mg/g, and the lipase was adsorbed firmly under high strength mechanical action (the retention rate is 66.4%, other physical adsorption under the same conditions is 51.6%). The soft tentacle immobilized lipase showed good dispersibility in the organic phase and its water absorption characteristics could provide oil-water interface for lipase in organic phase reaction, promoting the forward transesterification reaction. Compared with free lipase, the soft tentacle immobilized lipase (L-CDST-Ms) showed the improved activity, which could reach 180% of that of free lipase. The L-CDST-Ms was applied to biodiesel production, and the conversion rate could reach 94%. The results showed that the immobilization method opened up a new way for the application of lipase in transesterification .
研究领域:
生物化学
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酶工程
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可再生能源
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zhirong Zhang,Linghui Sun,Feiyu Chen,Lixin Huang,Xiangui Liu,Xu Huo,Xiuxiu Pan,Cancan Chen,Chun Feng
Welan gum has been widely used in harsh reservoir development, such as good thickening ability, temperature and salt resistance. However, viscoelasticity is crucial to polymer injectability and microscopic displacement efficiency, Welan gum have rigid helical conformation and show poor rheological properties., therefore, we proposed a double network strategy to improve the molecular conformation and rheological properties of Welan gum. Specifically, we synthesized β-cyclodextrin functionalized polyacrylamide (HPAM-CD) and adamantane modified Weland gum (WL-AD), and polyacrylamide and Welan gum through the supramolecular interaction to obtain double network crosslinking system (WL-AD&HPAM-CD). Rheology show that the double-network system driven by multiple non-covalent interaction has excellent rheological properties. Circular dichroism, atomic force microscopy and scanning electron microscope show that WL-AD&HPAM-CD forms a special molecular conformation, significantly improve the molecule elasticity of biopolymers, it has good conformational stability under harsh conditions. Therefore, oil recovery rate of WL-AD&HPAM-CD after water flooding in 200 mD cores is 4.99 % and 11.5 % higher than that of the same concentration of Welan gum and grafted Welan gum. In addition, WL-AD&HPAM-CD has excellent fluidity in 10-50 mD low permeability reservoirs, and can increase oil recovery by 12.17–17.16 % after water flooding. This study provides a research ideas for the development and application of biopolymers.
研究领域:
石油工程
·
生物高分子材料
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产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2019
·Vol. 10
·期 35
·4852-4858
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IF 4.76
Manqing Xie,Chen Wu,Chongyi Chen,Ying Liu,Chuanzhuang Zhao
A novel shape memory hydrogel with photo-adaptable permanent shape has been developed on the basis of alginate–Ca2+ coordination and the host–guest interaction between α-cyclodextrin and azobenzene. The reversible nature of alginate–Ca2+ confers the hydrogel with functions such as shape memory and shape recovery, and the light-responsive transition of azobenzene could be applied to generate a new permanent shape by tuning the host–guest complexation via UV light.
研究领域:
材料科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2014
·
IF 3.766
Weichun Huang,Sheng Wang,Chengxin Guo,Xiaoming Yang,Yaowen Li,Yingfeng Tu
Two simple and effective methods, “click” chemistry and supramolecular interactions, are demonstrated here to synthesize well-defined poly( l -lactide) (PLLA) functionalized graphene oxide (GO) sheets. We provide a simple method to introduce azide groups on GO sheets by the ring opening reaction of sodium azide with the epoxide groups of GO. The GO-N 3 sheets can easily undergo “click” reaction with alkyne-terminated PLLA by “grafting onto” method to produce GO/PLLA composites with high grafting ratio and exfoliated structure. Interestingly, GO-N 3 can be grafted with oxygen-containing polymers such as PLLA, polymethyl methacrylate (PMMA) or polyethylene oxide (PEO) via supramolecular interactions between the azide groups and these oxygen atoms on polymers, producing GO/polymer composites with low grafting ratio and intercalated structure. These “grafting onto” methods are useful to produce a variety of GO/polymer composites with different structure via “click” reaction or supramolecular interactions, which have potential applications in material science.
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
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Hao-Wei Lin,Yang-Peng Lin,Dan-Dan Huang,Zhi-Hua Chen,Ying-Chen Peng,Ze-Ping Wang,Ke-Zhao Du,Xiao-Ying Huang
Here, two isomeric ionic zero-dimensional indium bromide crystals of α (1)/β (2)-[OPy][InBr4(Phen)] (OPy = N-octylpyridinium; Phen = 1,10-phenanthroline) have been isolated simply by changing the cooling conditions in solvothermal syntheses. Structural comparisons indicate their different supramolecular interactions, which can be confirmed by Hirshfeld surface analyses. The crystal 2 has additional hydrogen bonds and π–π interactions; as a result, the more compact stacking of 2 could result in a 10-fold higher photoluminescence (PL) quantum yield (PLQY) than that of 1. Density functional theory calculations confirm the electron transition from the inorganic moiety to the organic ligand, which provides a further understanding of the optical process. This work provides a new idea for designing PL indium-based halides by understanding the structure–PL relationship.
研究领域:
材料科学
·
光学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Susu Zhao,Lixin Sun,Yibo Liu,Chuanhui Gao,Li Ding,Ze Kan,Yuetao Liu
Due to the limited static antifouling properties of silicone materials, their application in the marine field has been restricted. Chemical grafting antifouling agents onto matrix is an effective approach to enhancing this ability. Indole and its derivatives have garnered significant attention in marine antifouling due to their antibacterial, anti-UV and fluorescence properties. In this study, indole groups were introduced into the side chain of siloxane, and a novel silicone material was constructed utilizing cation-indole supramolecular interactions for the first time. As the constructed non-covalent cross-linked network, the maximum stress of materials could reach to 1.0 MPa, and the strain was up to 200 %. Furthermore, the materials exhibited self-healing capabilities at 60℃ for 9 h with a healing efficiency of 99 %, and could be fully recovered by solvent and hot pressing. As the coating materials, they effectively shielded ultraviolet light while maintaining a transmittance of 80 % in the visible region. The presence of indolyl group contributed to an inhibition rate 97.59 % against Escherichia coli and 93.75 % against Staphylococcus aureus. Additionally, the materials achieved a synergistic antifouling mechanism combining fluorescence and contact antibacterial effects. This study provided a new method for constructing silicone materials with potential applications in marine antifouling.
研究领域:
材料科学
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海洋生物学
·
抗菌研究
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2015
·Vol. 33
·期 8
·1140-1149
·
IF 1.835
Wu Lian-ying,Yu Lei,Fu Xiao-hui,Li Zhi-bo
A series of monomethoxy poly(ethylene glycol) (mPEG) grafted copolyglutamates (PmPEGs) were synthesized through ring-opening polymerization (ROP) followed by click chemistry. Supramolecular hydrogels based on polymer inclusion complexes (ICs) between PmPEG and α -cyclodextrin ( α -CD) were prepared in aqueous solution. The rheological measurements indicated their gelation properties were affected by several factors including the mPEG length, graft density and the sample concentration. These hydrogels displayed thermo-sensitive gel-sol transition under appropriate conditions due to the reversible mPEG and α -CD inclusion complexation. These hydrogels also showed pH-sensitive behavior due to the deprotonate of carboxylic acid side groups. The ICs formation of a channel-type crystalline structure induced gelation mechanism was verified by various techniques. In vitro cytotoxicity assays demonstrated that the supramolecular hydrogels are nontoxic and cytocompatible.
研究领域:
生物材料
·
高分子化学
·
药剂学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 22
·13773-13783
·
IF 3.945
Xian-Yi Jin,Xin Dai,Jie Zhao,Qingmei Ge,Mao Liu,Zhu Tao,Hang Cong
A supramolecular polymer was developed through the encapsulation of polypyrrole by cucurbit[6]uril (PPy@Q[6]), which was employed as the electrode material to improve the capacitor ability of conductive polypyrrole. In the optimized ratio of 2 : 1 (CPPy : CQ[6]), the capacitor properties of the supramolecular material were evaluated, and a high specific capacitance of 414 F g−1 at 10 mV s−1 was obtained, which was 3.1 times higher than that of pure polypyrrole (132 F g−1). A comprehensive analysis suggested that the capacitance performances should be relevant to the component, surface area, and pore volume of the materials. The addition of 0.4 M Fe2(SO4)3 into the electrolyte provided a surprising specific capacitance of 3530 F g−1 on the cucurbituril-encapsulated polypyrrole electrode material, with a high energy density of 707 W h kg−1 at a power density of 32 000 W kg−1 and a current density of 8 A g−1. The 81.6% capacitance retention maintained after 1000 cycles revealed the acceptable cycling capacity of the proposed supramolecular supercapacitor system, which demonstrated good performance even at a low temperature of −20 °C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2024
·
IF 3.5
Tong Li,Lu Zhang,Yong Wang,Xiaoxia Jia,Hui Chen,Yongjian Li,Qi Shi,Lin-Bing Sun,Jinping Li,Banglin Chen,Libo Li
Purifying ultra-high purity propylene (>99.995%) with an energy-efficient adsorptive separation method is a promising yet challenging technology that remains unfulfilled. Instead of solely considering the effect of adsorbents on guest molecules, we propose a synergistic adsorption mechanism for the deep removal of propane and propyne, utilizing supramolecular interactions in both “host-guest” and “guest-guest” systems. Through modulation of the pore environment, Ni-DMOF-DM exhibits exceptionally high adsorption capacities for propane and propyne (171 and 197 cm 3 /g at ambient temperature and pressure, respectively), and unprecedented propane/propylene separation selectivity (2.74). Theoretical calculations confirm the geometric interactions of C-H···π bonds and C-H···O hydrogen bonds resulting from host-guest interactions, alongside C-H···H guest-guest interactions within the confined pore space. Breakthrough experiments demonstrated that ultra-high purity propylene (propane < 0.005% and propyne < 1.0 ppm) can be directly collected from ternary mixtures on Ni-DMOF-DM, achieving a productivity of up to 152.14 L/kg.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Jiang Wu,Handan Lei,Jianjun Li,Zhanzhan Zhang,Guangyu Zhu,Guang Yang,Zhongkai Wang,Zan Hua
The development of sustainable functional materials derived from natural biomass is attracting tremendous attention from both academic and industrial fields in recent years. Besides renewability, sustainable polymeric materials are highly expected to outperform fossil fuel-derived analogues, showing the excellent application potentials. In this work, a renewable plant-oil based polymer was synthesized and its copolymers tackified by adenine/thymine-containing monomers could act as pressure sensitive adhesives (PSAs) with good performance attained. The PSAs containing adenine moieties had better adhesive properties compared with thymine-containing copolymers with the same molar ratio of comonomers, on account of its strong π - π stacking of purines . In addition, the supramolecular mixtures with complementary nucleobases could form intermolecular H-bonding interaction, having both enhanced peel and shear strengths over ones with individual nucleobases. The renewable plant oil-based PSAs showed outstanding reusability and robust adhesion to various substrates. More importantly, the long alkyl chains from the plant oil moieties also impart the adhesives with good hydrophobicity , which enables us to use the adhesives in the presence of water or even under water. This work highlights that the utilization of bio-inspired supramolecular interactions provides us with a straightforward and viable strategy for fabricating high performance biomass-based polymeric materials.
研究领域:
材料科学
·
生物学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2020
·
IF 6.785
Datong Wu,Fei Pan,Li Gao,Yongxin Tao,Yong Kong
Although an increasing number of researchers are developing electroanalytical protocols for the chiral recognition of amino acids, the electroactive units of the tested isomers still need to provide corresponding electrical signals. In this study, a supramolecular system was developed for the chiral electroanalysis of amino acids regardless of electroactive units. As a model system, an enantiopure electroactive molecule Fc-(S,S)-1 that includes a ferrocenyl group was synthesized and acted as a guest. Moreover, hydrophobic cyclobis-(paraquat-p-phenylene) (CBPQT4+-2) was used as the host. In the presence of π–π stacking and the attraction of π-electrons, CBPQT4+-2 can encapsulate Fc-(S,S)-1 into its cavity. Next, a screen-printed electrode was utilized for electrochemical chiral recognition. The host was fixed on the surface of the working electrode, and the guest was used as the electroactive chiral selector to support electron transfer. Once different configurations of amino acids (threonine, histidine, glutamine, and leucine) were mixed with the guest, regardless of whether they contained electroactive units, differences in the cyclic voltammetry results of the probe enantiomers could be observed, namely, in the peak currents or peak potentials. However, glutamine was an exception because the L-isomer had a stronger binding affinity with Fc-(S,S)-1 + Cu(II), which would limit the transport of the complex into the cavity of CBPQT4+-2, thereby resulting in a low peak current. Thus, an inverse phenomenon was observed with glutamine. In summary, we believe that this work can increase the testing scope for the chiral recognition of different kinds of isomers using electrochemical tools.
研究领域:
分析化学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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