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Dive into the research topics where Junfei Tian is active.

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Featured researches published by Junfei Tian.


Carbohydrate Polymers | 2017

Multivalent cations-triggered rapid shape memory sodium carboxymethyl cellulose/polyacrylamide hydrogels with tunable mechanical strength

Nan Li; Guangxue Chen; Wei Chen; Jiahe Huang; Junfei Tian; Xiaofang Wan; Minghui He; Hongfang Zhang

A novel multivalent cations-triggered shape memory hydrogels were synthesized in a one-pot method, and interpenetrating double network was formed by chemically cross-linked polyacrylamide (PAM) network and physically cross-linked sodium carboxymethyl cellulose network. The temporary shape was fixed by complexation between a native biopolymer, sodium carboxymethyl cellulose (CMC), and transition metal ions, specifically Fe3+, Ag+, Al3+, Cu2+, Ni2+, and Mg2+. In particular, CMC-Fe3+ hydrogel exhibits excellent shape fixity ratio (95%). Therefore, we chose PAM/CMC1.0-Fe3+ hydrogel as the model material and further investigated its shape recovery process. It was found that a wide range of molecules and anions could be applied to break off the temporary cross-links between CMC and Fe3+. The PAM/CMC composite hydrogels also exhibited excellent tunable mechanical properties. The mechanical properties of the composite hydrogel can be adjusted by changing the cross-linking densities. The presented strategy could enrich the construction as well as application of biopolymers based shape memory hydrogels.


ACS Applied Materials & Interfaces | 2017

Ionic Gel Paper with Long-Term Bendable Electrical Robustness for Use in Flexible Electroluminescent Devices

Minghui He; Kaili Zhang; Guangxue Chen; Junfei Tian; Bin Su

Conductive paper has low-cost, lightweight, sustainability, easy scale-up, and tailorable advantages, allowing for its promising potential in flexible electronics, such as bendable supercapacitors, solar cells, electromagnetic shields, and actuators. Ionic gels, exhibiting a lower Youngs modulus together with facile manufacturing, can fully serve as the conductive component to prepare conductive paper. Herein we report a low-cost (∼1.3 dollars/m2), continuous, and high-throughput (up to ∼30 m/min) fabrication of reliable and long-term (stable for more than two months) conductive paper. As-prepared conductive paper shows a high electrical durability with negligible bending-recovering signal changes over 5000 cycles. Using this ionic gel paper (IGP) as a key component, we build a variety of proof-of-principle demonstrations to show the capacity of IGP in constructing flexible electroluminescent devices with diverse patterns, including a square, an alphabetic string, and a laughing face. Our methodology has the potential to open a new powerful route to fabricate bendable conductive paper for a myriad of applications in future flexible electronics.


Journal of Agricultural and Food Chemistry | 2018

Engineering Biocompatible Hydrogels from Bicomponent Natural Nanofibers for Anticancer Drug Delivery

Junfei Xu; Shan Liu; Guangxue Chen; Ting Chen; Tao Song; Jing Wu; Congcan Shi; Minghui He; Junfei Tian

Natural hydrogels have attracted extensive research interest and shown great potential for many biomedical applications. In this study, a series of biocompatible hydrogels was reported based on the self-assembly of positively charged partially deacetylated α-chitin nanofibers (α-DECHN) and negatively charged 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOCNF) for anticancer drug delivery. The formation mechanisms of the α-DECHN/TOCNF hydrogels with different mixing proportions were studied, and their morphological, mechanical, and swelling properties were comprehensively investigated. Additionally, the drug delivery performance of the hydrogels was compared via sustained release test of an anticancer drug (5-fluorouracil). The results showed that the hydrogel with higher physical cross-linking degree exhibited a higher drug loading efficiency and drug release percentage.


Journal of Materials Chemistry C | 2017

Patternable transparent and conductive elastomers towards flexible tactile/strain sensors

Ren'ai Li; Guangxue Chen; Minghui He; Junfei Tian; Bin Su

Transparent conductive elastomers are an emerging platform for stretchable electronics, attractive due to their ability to sustain high physical deformations while still fulfilling optical/electrical functions. Poly(deep eutectic solvent)s (DESs) can serve as a new type of transparent conductive elastomers as a result of their low cost, green fabrication, non-toxicity and post-treatment-free advantages. Here, we report a 3D patternable (starfish type), transparent (transmittance of ∼81%), stretchable (strain up to 150%), and conductive (∼0.2 S m−1) elastomer based on the photopolymerization of the acrylic-acid/choline-chloride DES. The combination of transparency, elasticity, conductivity and patternability allows the poly(DES) elastomers to serve as flexible tactile/strain sensors. Our methodology has the potential to exploit the new application of poly(DESs), and opens up a new powerful route to fabricate all-organic transparent, conductive elastomers for a myriad of applications in future flexible electronics.


Archive | 2018

Influences of Paper on 3D Printing Quality in UV Ink-jet Printer

Liuxi He; Guangxue Chen; Minghui He; Junfei Tian

The paper intended to research the influences of paper in UV ink-jet printer, mainly including the height and glossiness. Results proved that infiltrations had all appeared between three selected substrates of paper, on which the paper roughness and bulkiness had a linear effect. And the infiltration on the first layer of ink was bigger than those on other layers of ink. It is too stable to not be changed by the paper that the infiltrations between two layers of ink. As we knew, paper roughness and bulkiness would reduce the glossiness. There existed ink sticks on the third layer of ink and more, even some ink holes when the infiltrations were too big because of the substrate of paper had a bigger roughness and bulkiness. Therefore, the substrates used for UV ink-jet 3D printing should have a property of tight and smooth, and the first layer of ink must not be calculated in the whole height of model, so that the printing result would be satisfied.


Progress in Organic Coatings | 2016

Synthesis and characterization of UV-curable castor oil-based polyfunctional polyurethane acrylate via photo-click chemistry and isocyanate polyurethane reaction

Guangxue Chen; Xiaoyuan Guan; Ruixin Xu; Junfei Tian; Minghui He; Wei Shen; Jianwen Yang


ACS Sustainable Chemistry & Engineering | 2017

Castor Oil Based Biothiol as a Highly Stable and Self-Initiated Oligomer for Photoinitiator-Free UV Coatings

Qing Wang; Guangxue Chen; Yanyan Cui; Junfei Tian; Minghui He; Jianwen Yang


ACS Sustainable Chemistry & Engineering | 2018

Low-Cost, Sustainable, and Environmentally Sound Cellulose Absorbent with High Efficiency for Collecting Methane Bubbles from Seawater

Nan Li; Wei Chen; Guangxue Chen; Xiaofang Wan; Junfei Tian


Chemical Communications | 2018

Green polymerizable deep eutectic solvent (PDES) type conductive paper for origami 3D circuits

Li Ren’ai; Kaili Zhang; Guangxue Chen; Bin Su; Junfei Tian; Minghui He; Fachuang Lu


ACS Sustainable Chemistry & Engineering | 2017

Correction to “Castor Oil Based Biothiol as a Highly Stable and Self-Initiated Oligomer for Photoinitiator-Free UV Coatings”

Qing Wang; Guangxue Chen; Yanyan Cui; Junfei Tian; Minghui He; Jianwen Yang

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Guangxue Chen

South China University of Technology

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Minghui He

South China University of Technology

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Kaili Zhang

South China University of Technology

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Nan Li

South China University of Technology

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Qing Wang

South China University of Technology

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Wei Chen

Qufu Normal University

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Xiaofang Wan

South China University of Technology

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Fachuang Lu

South China University of Technology

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Hongfang Zhang

Suzhou University of Science and Technology

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