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
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
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
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 30
·期 12
·2968-2976
·
IF 2.162
Yan Wang,Jinhui Liu,Lin Xia,Mei Shen,Zhenxiang Xin,Jinkuk Kim
Eucommia ulmoides gum (EUG) is a renewable and sustainable polymer, which could be used as rubber or plastic by altering its crosslinking density while the complicated extracting process and nonpolar molecular chains limited its application. In this effort, a novel extraction method was introduced, which could simplify the extraction process of EUG. Then, the extracted EUG-chloroform (CHCl 3 ) solution was directly used to prepare epoxidized EUG (EEUG) with an epoxy degree of 40.0% to improve its polarity. The epoxidized natural EUG exhibiting both polar and nonpolar motives had an advantage in working as an interfacial compatibilizer for polymer composites, especially bio-based composites due to its inherent biocompatibility. Accordingly, the role of EEUG in modifying the interface of styrene-butadiene rubber (SBR)/silica composites were explored. The results showed that EEUG in SBR/silica composites acted not only as a compatibilizer but also as a constructure generating better mechanical properties than other compatibilizers, such as silane couplings, Si-69 and KH-550, and epoxidized natural rubber (ENR). The simplified extracting process and the epoxy modification of EUG would extend its application in rubber materials, medical materials, and biopolymer materials.
研究领域:
材料科学
·
生物化学
·
高分子化学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Zhonglei Kang,Bo-xing Zhang
Due to the increasing pressure of environmental protection and the depletion of oil resources, Eucommia ulmoides gum (EUG) as a natural renewable and degradable biopolymer has attracted more and more attention. In this work, multilayer carbon nanotube film (CNF)/EUG composite films were fabricated through the infiltration and hot-pressing process. By taking advantage of the elasticity of EUG and the specific strength of CNF, composite films exhibited much more improved mechanical strength (maximum tensile stress up to 108.4 MPa) compared with pristine EUG and CNF alone. In addition, composite films prepared with five CNF layers and five infiltration cycles of EUG solution with a thickness of 181 μm can achieve the highest total shielding effectiveness value of 88 dB in 15.6 GHz. Moreover, the folded composite film can recover quickly to the fixed permanent shape when exposed to infrared light, demonstrating fascinating infrared-triggered shape memory behavior. This work provides a facile and general method to fabricate CNF/EUG composite films and is beneficial for pushing forward the practical application of EUG materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Na Sun,Jiacheng Yu,Wuchao Cheng,Jieting Geng,Zhenxiang Xin,Lin Xia
Driven by technological advancements and rising living standards, the demand for high-performance cotton textiles continues to grow. Drawing inspiration from the stimuli-responsive behavior of Mimosa pudica and the inherent superhydrophobicity of lotus leaf surfaces, this study presents the development of a new class of smart cotton fabrics integrating superhydrophobicity, shape memory functionality, and wear resistance. The engineered smart cotton fabrics incorporate Eucommia ulmoides gum (EUG) and surface-tailored sepiolite particles as core functional elements. Central to this work is an innovative surface modulation strategy leveraging shape memory effects to dynamically control material hydrophobicity through thermoresponsive structural reconfiguration. Fabricated via a scalable dip-coating technique, these composites achieve tunable wettability without fluorine-based chemicals, marking a departure from conventional approaches. The innovation of this manuscript also lies in the cotton fabric’s fluorine-free composition and its eco-friendly preparation process. These characteristics enable cotton fabrics to adjust their surface wettability based on different usage environments and needs, offering vast possibilities for creating and designing intelligent products.
研究领域:
材料科学
·
纺织工程
·
仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 6
·1261-1271
·
IF 3.286
Sun Ya Kun,Sun Guang-Ying,Jia Man,Yang Jian,Liu Zhao-Sheng,Huang Yan-Ping,Aisa Haji Akber
One of the main challenges in large-scale applications of molecularly imprinted polymers (MIPs) is the significant amount of template needed in polymer preparation. A new strategy based on room-temperature ionic liquids (RTILs) was suggested to solve this problem by reducing the amount of template in the polymerization recipe. The MIP was synthesized with a mixture of dimethyl sulfoxide and RTIL (1-butyl-3-methylimidazolium tetrafluoroborate) as porogen, in which chlorogenic acid (CGA) was used as template, 4-vinylpyridine (4-VP) as functional monomer, and ethylene glycol dimethacrylate (EDMA) as cross-linker. The influence of polymerization variables, including CGA concentrations, and the ratio of 4-VP to EDMA on imprinting effect were investigated comprehensively. Moreover, the properties involving the column permeability, the number of binding sites, and the polymer morphology of the CGA-MIP monoliths were studied thoroughly. The MIP monolith had an excellent column permeability (1.53 × 10 −13 m 2 ) and allowed an ultra-fast on-line SPE, which dramatically shortens the separation time (< 10 min) and improves the separation efficiency. At high flow velocity (5.0 mL min −1 ), 50 μL of the extract from Eucommia ulmoides leaves can be loaded directly on the CGA-MIP monoliths and CGA with high purity can be obtained with a recovery of 89.01 ± 0.05%. As a conclusion, the resulting RTIL-induced approach of preparing MIP may be an effective tool in fabricating MIP in a low-cost way.
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研究领域:
化学工程
·
药物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BMC Chemistry
·
2021
·Vol. 15
·期 1
·1-10
·
IF 2.61
Huirong Zhang,huina Zhang,Nifeng Chen,Li Li
Background Eucommia ulmoides seed oil is a functional health oil with a high content of unsaturated fatty acids. However, excessively high content of unsaturated fatty acids can cause E. ulmoides seed oil to easily spoil. Microencapsulation technology can effectively encapsulate substances, thereby prolonging the spoilage time of oil products. Methods In the present study, E. ulmoides seed oil from different manufacturers were analyzed by Agilent 7890B-5977A gas chromatography – mass spectrometry. Encapsulation efficiency, yield rate, and scanning electron microscopy results between microcapsules prepared use different wall materials and different methods (spray drying and complex coagulation) were compared to determine the best preparation process for microcapsules. The Wantong 892 professional oil oxidation stability tester was used to measure the induced oxidation time of the E. ulmoides seed oil and microcapsules. Conclusion E. ulmoides seed oil comprises > 80% unsaturated fatty acids with a high α-linolenic acid content, followed by linoleic acid. The most promising combination was chitosan:gum arabic at 1:8 as the wall material and complex coagulation. The best preparation had a wall material concentration, stirring speed, aggregation pH, and core-to-wall ratio of 2.5%, 500 rpm, 4.2, and 1:4, respectively. Microcapsules prepared under these conditions exhibited higher yield and encapsulation efficiency (94.0% and 73.3%, respectively). The induced oxidation time of the E. ulmoides seed oil and microcapsules were 3.8 h and 13.9 h, respectively, indicating that microencapsulation can increase the oxidation induction time of this oil.
研究领域:
食品科学
·
化学工程
·
制药技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）