POLYMER TESTING
·
2021
·
IF 4.282
Lin Xia,Yuan Ma,Qi Wang,Jiafeng Meng,Jieting Geng
The study of Eucommia ulmoides rubber (EUR) has received increasing attention in the past few years. In this manuscript, we prepared a series of novel Eucommia ulmoides rubber foams with excellent shape memory behavior. We studied the mechanical, thermal and shape memory properties of foamed composites and attempted to establish the relationship between microstructure and macroscopic properties. The results showed that the mechanical properties increased greatly from 4.1 MPa to 7.8 MPa with the increase of cross-linking agent. However, the shape memory properties of foamed composites were closely related to the crosslinking degree. In these EUR foams, the cross-linked network worked as a fixed phase, while the crystalline regions acted as a reversible phase in the shape memory behavior.
研究领域:
材料科学
·
生物学
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 8
·3297-3308
·
IF 3.665
Lin Xia,Qi Wang,Jiafeng Meng,Zhenguo Ma,Ping Zhao
A series of thermal and electro double-stimulus shape memory composites were processed using natural Eucommia ulmoides gum (EUG) and carbon nanotubes (CNTs). Mechanical, cure, and thermal properties were studied by universal testing machine, differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA), respectively. The shape memory behavior of the composites was explored via heat and electrical stimulation. The cross-linked network in the composites acted as a fixed domain, and the crystalline regions acted as a reversible domain during shape memory process. We studied the shape memory behavior of composites at different voltage and monitored the temperature change of composites during the process of electro-induced deformation memory in real time. Experimental results showed that appropriate amount of carbon nanotubes could not only improve the strength of composites but also provide electrical shape memory properties to composites. So, it is underscored that these kinds of shape memory composites exhibit excellent electro-responsive properties and have the potential to be used for intelligent and multiresponse shape memory applications.
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
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Guoqiang Cui,Xinyu Yang,Zaizhi Liu,Mengxia Wei,Tingting Liu,Huiyan Gu,Lei Yang
Limonene was used as an extraction solvent to obtain gutta-percha from leaves, samara, and bark of Eucommia ulmoides. The extraction conditions for the gutta-percha of E. ulmoides were optimized using a set of optimization processes. The optimized conditions were a liquid–solid ratio (L/S ratio) of 19.7 mL/g, extraction temperature of 134 °C, and extraction time of 1.8 h for the bark; an extraction temperature of 128 °C, extraction time of 1.7 h, and L/S ratio of 14 mL/g for the samara; and an extraction time of 1.4 h, L/S ratio of 15 mL/g, and reaction temperature of 138 °C for the leaves. Under these optimized extraction conditions, the actual extraction yields of gutta-percha were 55.32 ± 2.53 mg/g (bark), 81.14 ± 3.84 mg/g (samara), and 22.15 ± 1.08 mg/g (leaves). The gutta-percha obtained by limonene extraction was evaluated by thermogravimetric and differential thermogravimetric tests, gel permeation chromatography, differential scanning calorimetry, and Fourier transform infrared spectroscopy. Limonene has promising potential to replace traditional petroleum-based solvents to isolate gutta-percha from E. ulmoides.
研究领域:
植物化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
POLYMER TESTING
·
2019
·
IF 2.943
Lin Xia,Fengcheng Yang,Hao Wu,Meng Zhang,Zhaoge Huang,Guixue Qiu,Zhenxiang Xin,Wenxin Fu
Multi-stimulus response materials are a kind of materials in the branch of intelligent materials, which provide diversified possibilities for the application of materials. A new series of thermal and water dual induced shape memory composites were designed and prepared by simple melt-blending method in this manuscript. These dual shape memory composites were mainly composed of two components, natural Eucommia ulmoides rubber (EUR) and polyethylene oxide (PEO). The shape memory behavior of the composites was investigated under three stimulation conditions: heat, water and both heat and water. We studied the mechanism of heat and water triggered the shape memory properties by considering the mechanical properties , water contact angle, water uptake, thermal properties, and other properties of the composites. We also proposed two schematic diagrams to explain the thermal and water dual induced shape memory processes of composites. Overall, all these EUR/PEO composites displayed both excellent mechanical properties and water/heat double-stimulus shape memory properties, which might provide a new way for the industrial production of smart shape memory materials.
研究领域:
材料科学
·
智能材料
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Pan-Pan Yue,Ze-Jian Leng,Jing Bian,Ming-Fei Li,Feng Peng,Run-Cang Sun
Eucommia ulmoides gum (EUG) and Poly(ε-caprolactone) (PCL), a degradable, promising and “green” feedstock , can be used to fabricate composite films by a rapid and simple solution casting method, which have characteristics of degradability, hydrophobicity , strength , and toughness. Herein, EUG was extracted with petroleum ether from seed coats of Eucommia ulmoides and characterized with Fourier transform infrared (FT-IR) and nuclear magnetic resonance spectroscopy (NMR). The FT-IR and NMR revealed that the construction of the EUG and PCL of composite films are a physical blending process . Besides, the addition of PCL effectively enhances the thermal stability of composite films. The concentration of PCL is 0.84 wt% in composite film (P 0.84 wt% ), which exhibits an excellent elongation at break and energy density at break of 514.3% and 106.4 MJ/m 3 , respectively. The maximum tensile strength of the resultant film is 1.8 times higher than that of the control film. The hydrophobicity and water vapor barrier property of P 0.84 wt% film is increased by 26.6% and 84.0%, respectively, than that of the control film. It is believed this work provided a rapid and simple strategy to fabricate degradable, strong, and tough film.
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
JOURNAL OF PLANT BIOLOGY
·
2024
·
IF 2.2
Zhan Niheng,Zhao Ziyi,Ren Lingyan,Yang Fuxin,Zhang Chuhan,Qin Lijun,Gong Xian
NAC (NAM/ATAF1,2/CUC2) is one of the most important plant-specific transcription factors, playing a significant role in plant growth, morphogenesis, and stress resilience. In this investigation, 77 members of the NAC gene family were identified from the Eucommia ulmoides database, and these E. ulmoides NAC families were classified into 18 subfamilies based on their protein sequences. Currently, the architectural design, conserved domains, and cis -acting elements of EuNAC genes, as well as physicochemical properties of EuNAC proteins, have also been analyzed. In addition, the expression patterns of selected EuNAC genes under five heavy metal (Cu 2+ , Cd 2+ , Pb 2+ , Mn 2+ , and As 5+ ) imposed stresses were investigated. The results showed that the expression of EuNAC9 experienced a significant induction to upregulate under these five heavy metal stresses, suggesting that EuNAC9 may mediate the response to these five heavy metal stresses. In addition, the function of EuNAC9 was investigated in both transgenic yeasts and tobaccos. The transgenic yeasts exhibited enhanced resistance to Mn 2+ stress by increasing the expression of ScSMF1 and ScSOD2 , whereas the transgenic tobacco grew better under Mn 2+ stress and showed intense antioxidant enzyme activity to alleviate the accumulation of H 2 O 2 and O 2 − . Moreover, subcellular localization indicated EuNAC9 was a nuclear localization protein, and the transcriptional activity domain of EuNAC9 resided at the C-terminal. This study will provide a theoretical framework for analyzing the molecular regulatory mechanisms of plant responses to heavy metals mediated by EuNAC9 genes and elucidating the biological roles of E. ulmoides NACs in responding to heavy metal stress.
研究领域:
植物学
·
遗传学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
BMC PLANT BIOLOGY
·
2025
·Vol. 25
·期 1
·1-27
·
IF 4.8
Wang Pei-lu,You Jin-ling,Hua Qian-ming,Li Hua-qiang,Shi Qi,Li Wen-long,Sheng Yun-jie,Liu Kao-hua,He Bing-qian,Zhang Qiao-yan,Qin Lu-ping,Meng Xiong-yu
Background Eucommia ulmoides Oliver is a dioecious plant with great economic value, but the underlying metabolite mechanism difference between male and female E. ulmoides remain poorly understood.Results In this study, we integrated a dual-platform metabolomics approach with transcriptomics to systematically analyze differences in metabolite and gene expression in the cortex and leaves of male and female E. ulmoides. As a result, 1,452 metabolites (603 volatile, 849 non-volatile) were characterized, and 156 and 129 differentially accumulated metabolites were identified in FEC vs. MEC and FEF vs. MEF, respectively. The expression of key genes (PLA2G4, DOXs, LOX2S, and CEQORH) involved in alpha-linolenic acid metabolism was significantly altered in MEC. Similarly, the expression of key genes (CHS, FLS, DFR, and ANR) involved in flavonoid biosynthesis was significantly altered in MEF.Conclusion sOur findings shed light on the metabolite mechanism behind the metabolic differences between male and female E. ulmoides and contribute to the exploration of value utilization.
研究领域:
植物学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 306
·期 11
·2100370
·
IF 4.367
Xin Qi,Enyun Xu,Manman Jia,Jichuan Zhang,Liqun Zhang,Dongmei Yue
At present, the synthesis of body temperature triggering shape memory polymers usually requires elaborate structural design, which limits their wide application. Herein, starting from bio-based Eucommia ulmoides gum (EUG), a series of EUG/silica hybrids (ESHs) are prepared through a facile one-pot process, in which EUG is epoxied and then self-crosslinked with SiO 2 by epoxy ring-open reaction. Varying the amount of H 2 O 2 , the shape memory transition temperature ( T trans ) of ESHs is adjusted to 47.4–36.6 ℃, which is close to human body temperature (37 ℃). Among them, ESH-17 exhibited the best body temperature triggering shape memory ability ( T trans = 36.6 ℃), which can restore the permanent shape within 60 s at 37 ℃ with a shape fixity ratio of 99% and shape recovery ratio near 100%. In addition, the shape memory mechanism is discussed and shows some application scenarios of ESHs. The as-produced materials can be used as smart biomaterials such as self-tightening sutures, self-sealing root canal filling materials, and so on.
研究领域:
材料科学
·
生物学
·
医学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Runping Wang,Zaibo Yang,Wenzhi Lv,Zhijian Tan,Hongfu Zhang
The choline tryptophan ionic liquid (IL)-based aqueous biphasic system (ABS) was designed and applied to extract and separate flavonoids and iridoids from Eucommia ulmoides leaves. This ABS possessed a unique viscous layer enriching iridoids that can be directly removed at the interface between the IL-rich and salt-rich phases. The extraction yield of total flavonoids was optimized by RSM to obtain a predicted maximum of 2.91% at the IL concentration of 36.73%, liquid to solid ratio of 38, extraction temperature of 44 °C and extraction time of 105 min. The determined extraction yield of total flavonoids is 2.78% ± 0.12% under revised optimization conditions. The distribution coefficient K and extraction rate E of total flavonoids in the IL-rich phase reach the maximum of 129% and 98.53% at the K 3 PO 4 content of 26% in the ILABS, respectively. The HPLC analysis shows a high content of rutin in the flavonoids precipitate induced by water as an anti-solvent. Aucubin content reaches 15.19% in the intermediate viscous layer enriching iridoids. Hence, the designed process has the potential to be applied to the separation and enrichment of rutin and aucubin from other industrial crops.
研究领域:
植物化学
·
天然产物分离
✓ 已验证
DOI
高影响因子
CHEMICAL PAPERS
·
2023
·Vol. 77
·期 9
·5357-5369
·
IF 2.2
Duan Cong-Jia,Zhang Ying,Yu Lian,Chang Yuan-Hang,Xu Jian,Yue Gan-Lu,Han Xu,Wang Chen-Lu,Fu Yu-Jie
This work, an efficient method for simultaneous extraction and separation of different polarity phytochemicals from E. ulmoides seeds was developed with green solvent cyclopentyl methyl ether (CPME) system. Firstly, the green solvent CPME with optimal solubility for E. ulmoides seeds oil (EUO) was fast screened by Hansen solubility parameters (HSPs). Under optimum conditions: liquid–solid ratio of 20:1, ultrasound time of 60 min and ultrasound power of 60 W, 28.6% EUO and 6.4% aucubin (AU) were extracted by cyclopentyl methyl ether-ethyl alcohol (CPME-EtOH) system, which were 1.10- and 1.19-fold higher than that of traditional extraction. Meantime, the fatty acid composition and in vitro biological activity of EUO shown it had 86.99% unsaturated fatty acids and excellent antioxidant activity, non-cytotoxicity and lipid-lowering activity. Moreover, EUO had good physicochemical properties and met the standard of edible oil, which indicated EUO is a good oil source for medicine and food. Besides, the CPME that has been recycled six runs can still extract 25.6% EUO. In short, this study gave some guidance for simultaneous extraction and separation of hydrophobic oil and hydrophilic bioactive compounds from plant resources using green solvent instead of petrochemical solvents in food, pharmaceutical, cosmetic and other fields.
Graphical abstract
研究领域:
植物化学
·
食品科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Research
·
2023
·Vol. 27
·期 1
·1-13
·
IF 11.3
Sun Avery Rui,Sun Qili,Wang Yansong,Hu Liqiu,Wu Yutong,Ma Fenbo,Liu Jiayi,Pang Xiangchao,Tang Bin
Background Titanium (Ti) is now widely used as implant material due to its excellent mechanical properties and superior biocompatibilities, while its inert bioactivities might lead to insufficient osseointegration, and limit its performance in dental applications. Methods We introduced a robust and simple approach of modifying titanium surfaces with polysaccharide complexes. Titanium samples were subjected to hydrothermal treatment to create a uniform porous structure on the surface, followed by coating with a bioinspired and self-assembly polydopamine layer. Strontium Eucommia Ulmoides Polysaccharide (EUP-Sr) complexes are then introduced to the polydopamine-coated porous titanium. Multiple morphological and physiochemical characterizations are employed for material evaluation, while cell proliferation and gene expression tests using macrophages, primary alveolar bone osteoblasts, and vascular endothelial cells are used to provide an overall insight into the functions of the product. The significances of statistical differences were analyzed using student’s t-test. Results Microscopic and spectrometric characterizations confirmed that the Ti surface formed a porous structure with an adequate amount of EUP-Sr loading. The attachment was attributed to hydrogen bonding between the ubiquitous glycosidic linkage of the polysaccharide complex and the ring structure of polydopamine, yet the loaded EUP-Sr complex can be gradually released, consequently benefiting the neighboring microenvironment. Cell experiments showed no cytotoxicity of the material, and the product showed promising anti-inflammation, osseointegration, and angiogenesis properties, which were further confirmed by in vivo evaluations. Conclusion We believe the EUP-Sr modified titanium implant is a promising candidate to be used in dental applications with notable osteoimmunomodulation and angiogenesis functions. And the novel technique proposed in this study would benefit the modification of metal/inorganic surfaces with polysaccharides for future research.
研究领域:
材料科学
·
生物材料
·
牙科学
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Lian Yu,Liu Cao,Yuan-Hang Chang,Cong-Jia Duan,Chang Liu,Xue-Lian Zhao,Gan-Lu Yue,Xi-Qing Wang,Yu-Jie Fu
In this work, an efficient and environmentally friendly extraction process was proposed to simultaneously obtain iridoids and phenolic acids from Eucommia ulmoides Oliver leaves (EUL). Namely, the integrated microwave-assisted ternary deep eutectic solvent extraction (TDES-MAE), which was firstly applied to extract compounds from EUL for the first time. In the tailor-made TDES system, tiny ascorbic acid (Vc) was added to modify the acidity of the binary deep eutectic solvents (BDES)composed of a 1:2 M ratio of Choline chloride/1,4-butanediol)to form TDES, which possess a higher extraction yield than BDES. Some factors including DES types, molar ratio, water content and selection of hydrogen bond donor (HBD) were investigated to get the superior TDES solvent. Then Box-Behnken design was implemented to acquire the optimum conditions, such as extraction time, extraction temperature, liquid-solid ratio were optimized by using response surface methodology (RSM). Under the optimal conditions, extraction efficiency of the TDES-MAE was significantly increased and 1.4-fold to the traditional method. Meanwhile, the excellent recovery and the antioxidant activity shown that the extraction system based on tailor-made TDES was economically productive and efficient for extracting more beneficial products from plants.
研究领域:
植物化学
·
天然产物开发
·
药用植物研究
✓ 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）