Liqun Zhang's research while affiliated with Beijing University of Chemical Technology and other places

Publications (642)

Article
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Background Taraxacum kok-saghyz Rodin (TKS) is a promising commercial alternative natural rubber (NR) yielding plant. Cultivating TKS with a high NR content is an important breeding target, and developing molecular markers related to NR content can effectively accelerate the breeding process of TKS. Results To construct a high-density SNP genetic...
Article
Shape memory polymers (SMPs) have attracted wide attention over the past few decades due to their fantastic applications in modern life. Nevertheless, excellent self-healing properties, recyclability, solid-state plasticity, and reversible shape-switching ability are necessary but can rarely be satisfied in one material. Herein, we report multifunc...
Article
Exercise not only builds up one’s health but also reduces the risk of developing diseases including type 2 diabetes, cancer, and cardiovascular diseases. Being one of the most classic and popular sports, track and field will does harm to one’s knees if not enough buffering is provided by the track. In a world that is urgently calling for environmen...
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Tires are often in service under dynamic conditions. Realizing the high-precision prediction of the mechanical response of rubber materials under cyclic loading can provide guidance for the design of high-performance tires. In this work, the tensile recovery stress-strain responses of rubber materials in nine different components of a truck and bus...
Article
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Peripheral nerve injury is a serious medical problem with limited surgical and clinical treatment options. It is of great significance to integrate multiple guidance cues in one platform of nerve guidance conduits (NGCs) to promote axonal elongation and functional recovery. Here, a multi‐functional NGC is constructed to promote nerve regeneration b...
Article
The construction of gradient scaffolds to mimic the in vivo microenvironment for promoting tissue regeneration is attractive, especially by incorporating biochemical cues with physical guidance to manipulate cell behavior. Here, we report a general method to generate dual concentration-gradient of two types of bioactive components on scaffolds comp...
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Correction for ‘Effect of the content and strength of hard segment on the viscoelasticity of the polyurethane elastomer: insights from molecular dynamics simulation’ by Yimin Wang et al. , Soft Matter , 2022, 18 , 4090–4101, https://doi.org/10.1039/D2SM00463A.
Article
Organic montmorillonite/brominated butyl rubber nanocomposites are prepared by improved solution blending, i.e., preparation of organic clay suspension and suspension blending with brominated butyl rubber solution by adding polytetramethylene ether glycol as interface agent. Scanning electron microscopy and atomic force microscopy show that polytet...
Article
Polymer nanocomposites (PNCs) are widely used in automobile tire manufacturing industry. Concerning the long-standing energy crisis, designing and fabricating PNCs with both high strength and low energy consumption has gained numerous scientific interests. Inspired by nanoparticle-based supramolecular materials, the processed nanoparticles (NPs), a...
Article
Fatigue property is of great importance for the security and reliability of rubber products. The fatigue performance of natural rubber (NR) filled with carbon nanotube (CNT) and carbon black (CB) with different content but similar hardness was investigated. Results indicated that CNT/NR exhibited the best fatigue performance at low CNT content and...
Article
The dispersion and diffusion mechanism of nanofillers in polymer nanocomposites (PNCs) are crucial for understanding the properties of PNCs, which is of great significance for the design of novel materials. Herein, we investigate the dispersion and diffusion behavior of two geometries of nanofillers, namely, spherical nanoparticles (SNPs) and nanor...
Article
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Flexible epidermic sensors made from conductive hydrogels are holding bright potential in personalized healthcare, multifunctional electronic skins, and human‐machine interfaces. However, it is still a great challenge to simultaneously realize conductive hydrogel‐based epidermic sensors with reliable self‐healing ability and remarkable sensing perf...
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Versatile strategies have been developed to construct electrospun fiber-based drug delivery systems for tissue regeneration and cancer therapy. We first introduce the construction of electrospun fiber scaffolds and their various structures, as well as various commonly used types of drugs. Then, we discuss some representative strategies for controll...
Article
The hazard to the ecosystem caused by rubber microparticles generated from tire abrasion has been a constant concern. Therefore, to protect this ecosystem, the development of a tire tread with high abrasion resistance is especially significant. Herein, γ-aminopropyltriethoxysilane (APTES) was used to modify graphene oxide (GO) and silica (SiO2) to...
Preprint
Full-text available
Background Taraxacum kok-saghyz Rodin (TKS) is a promising commercial alternative NR yielding plant. Cultivating TKS with a high NR content is an important breeding target, and developing molecular markers related to the NR content can effectively accelerate the breeding process of TKS. Results To construct a high-density SNP genetic map and uncov...
Article
Full-text available
We report a simple strategy for improving the hydrophilicity of carbon black. Tannic acid (TA) and diethlyenetriamine (DETA) were employed to co-deposit on the surface of CB via immersing the CB in an alkaline TA and DETA solution with gently stirring at room temperature. The surface chemistry characteristics and hydrophilic of CB are investigated....
Article
Existing silicone elastomers (SR) are difficult to serve properly in extreme high and low temperature environments. Herein, through molecular dynamics (MD) simulations, a novel SR with wide temperature resistance range was designed using silicon-oxygen bonds (-Si-O-) to construct the backbone and side chains of polymer chains. Firstly, we investiga...
Article
The focus of this paper is to report the quantitative synthesis of bis‐epoxy end functionalized polyisoprene (BETPI) macromonomers by anionic polymerization and reversible addition fragmentation chain transfer (RAFT) polymerization. For anionic polymerization, more stable and sterically hindered living anions polyisoprene (Li+‐PIp‐Li+) react with e...
Article
Polymer nanocomposites (PNCs) have been attracting myriad scientific and technological attention due to their promising mechanical and functional properties. However, there remains a need for an efficient method that can further strengthen the mechanical performance of PNCs. Here, we propose a strategy to design and fabricate novel PNCs by incorpor...
Article
Attributed to the reinforcing effect of the NPs, filled natural rubber (NR) exhibits more excellent mechanical properties compared to pure natural rubber and has been attracting considerable scientific and technological attention. However, only a few studies have shown a systematical understanding of the structure-mechanics relation of filled natur...
Article
Elastomeric damping materials are essential in modern life. Apart from natural rubber, conventional elastomers are mostly based on petroleum-based sources. Moreover, elastomers exhibit excellent damping properties in the glass transition region, the glass transition temperature (T g) of elastomers is lower than room temperature, resulting in poor d...
Article
A coarse-grained model is used to investigate how the added non-conductive nanospheres (NS) influence the network formation of nanorods (NR) in polymer matrix. First, an algorithm is developed to calculate the formation probability of the percolated network of NRs. Then based on it, conductive probability is obtained which presents a gradual increa...
Article
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Rubber composites make an important contribution to eliminating vibration and noise owing to their unique viscoelasticity. However, it is important to find alternative bio‐based products with high damping properties owing to the shortage of petrochemical resources and poor performance. The ability to self‐heal is an additional characteristic that i...
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Polymerized, functionalized solution styrene–butadiene rubber (F-SSBR) is a new type of polymerized styrene–butadiene rubber solution containing specific terminal groups, which can be used in treads for high performances. However, the wet skid resistance related to safety, the rolling resistance to energy consumption, and the wear resistance to ser...
Article
In this work, a coarse-grained model is adopted to explore the fracture toughness of a dual cross-linked hydrogel which consists of a physically cross-linked network and a chemically cross-linked network. By calculating the fracture energy, the optimized fracture toughness of the hydrogel appears at the intermediate content of the chemical network....
Article
The graphene reinforced nanocomposites have been attracting considerable attention owing to their excellent mechanical and physical properties. Herein we systematically develop a multiscale scheme of graphene-polyisoprene nanocomposites, in which the effective coarse-grained potentials of polyisoprene (PI), graphene, interface derived from the all-...
Chapter
Combining the equally valued electrospinning technology with 3D printing3D Printing can form specific patterns on electrospun fibersFibers and improve the size defects of 3D printing3D Printing. 3D printing3D Printing and electrospinning can be used in turn to prepare multi-layered scaffolds with specific structures, such as building blocks or sand...
Article
Flexible wearable electronics have received tremendous attention for their potential in electronic skins, wearable healthcare monitoring, and human-machine interfacing. However, it remains a critical challenge to simultaneously achieve wearable epidermic sensing with broad sensing range, fast response/recovery time, and perfect conformability onto...
Article
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Chronic inflammation plays a side effect on tissue regeneration, greatly inhibiting the repair or regeneration of tissues. Conventional local delivery of anti-inflammation drugs through physical encapsulation into carriers face the challenges of uncontrolled release. The construction of an inflammation-responsive prodrug to release anti-inflammatio...
Article
Biodegradable polyester elastomers have found wide application in the tissue engineering field. In this study, an all bio-based polyester elastomer (BPE) is synthesized from five bio-based monomers; and the in vivo biodegradability and biocompatibility of the BPE are first evaluated using a subcutaneous mouse model, aiming to investigate its potent...
Article
Soft tissue damage is a common clinical problem that affects the lives of a large number of patients all over the world. It is of great importance to develop functional scaffolds to manipulate and promote the repair and regeneration of soft tissues. Owing to their unique composition and structural properties, electrospun nanofibers have attracted m...
Article
Dielectric elastomers (DEs) are a special material that deform responding to an electric field. The induced strain is known as actuated strain (AS). This phenomenon is totally different from electrostriction, for there is no crystal lattice in elastomers and the AS of DEs is much greater. The most accepted mechanism holds the view that the AS of DE...
Article
Pristine polyurea elastomers are usually limited by insufficient strength and lack of functionality. Smart, multifunctional and mechanically resilient nanocomposites were manufactured in this study by compounding functionalized graphene nanoplatelets (F-GNPs) with polyurea via in situ polymerization. This was followed by investigation of the mechan...
Article
The fatigue performance of rubber composite cannot be ignored in the field of engineering. Fatigue crack growth rate (FCGR) test by using a planar tensile specimen with a crack or cracks is often used for rubber fatigue characterization. Thermo-mechanical coupling characteristics of rubber composite under dynamic loading are significant and need to...
Article
Polymer welding has received numerous scientific attention, however, the welding of polymer nanocomposites (PNCs) has not been studied yet. In this work, via coarse‐grained molecular dynamics simulation, we focus our attention on investigating the welding interfacial structure, dynamics and strength by constructing the upper and lower layers of PNC...
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Jiajia Xue and co‐workers present an overview of the construction of bioactive nerve guidance conduits integrated with topographical cues, biological effectors, and cellular components to repair peripheral nerve injury. The implementation of appropriate interventions especially non‐invasively external stimuli, such as light, electric field, magneti...
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The hysteresis of rubber materials due to deformation and viscoelasticity is the main reason for the heat build-up (HBU) and rolling resistance (RR) of the rolling tire. It is important to realize the high precision prediction of HBU and RR of tire for the optimal design of high-performance fuel-saving tire. In this work, a thermo-mechanical coupli...
Article
Due to the wide application, it is very crucial to understand the viscoelasticity of the polyurethane elastomer (PU, denoted by soft-hard block copolymer), which contains the soft segments (SS) and hard segments (HS). Thus, in this work, the effect of the content and strength of HS on the viscoelasticity of PU is explored in detail by adopting a co...
Article
Tire development tendency is green, environment‐friendly, and safeguarding life and health. The conventional tires, consisting of solution polymerized styrene‐butadiene rubbers (SSBR), silica, silane coupling agents, and other rubber additives, will not be able to keep up with the demand. SSBR, as a synthetic rubber processed from nonrenewable petr...
Article
Understanding the elastomer fatigue mechanism under a cyclic loading is of vital importance in fabricating elastomer nanocomposites with high performance. Based on the microstructural evolution and the mechanical response under the dynamic periodic loading, the molecular mechanism about the effect of cross-linked network (including crosslink bond t...
Article
Complementary interactions between the natural nucleobases is one of the important ways of biomolecular recognition. Although scientists have introduced such supramolecular non‐covalent interactions into biomimetic materials through different approaches in recent years, further research is still needed to confer structural features of biomolecules...
Article
The dynamics of polymer-grafted nanoparticles (PGNPs) in melts of unentangled linear chains were investigated by means of coarse-grained molecular dynamics simulations. The results demonstrated that the graft monomers closer to...
Preprint
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The rapidly developing aerospace industry has a severe requirement for rubber components utilized for spacecraft, especially the resistance to extreme temperature difference because of the complex space environment. However, it is difficult to increase the service temperature range of the existing elastomeric materials based on the traditional meth...
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Diarylethene (DAE) photoswitch is a new and promising family of photochromic molecules and has shown superior performance as a smart trigger in stimulus-responsive materials. During the past few decades, the DAE family has achieved a leap from simple molecules to functional molecules and developed toward validity as a universal switching building b...
Article
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Peripheral nerve injury is a large‐scale problem that annually affects more than several millions of people all over the world. It remains a great challenge to effectively repair nerve defects. Tissue engineered nerve guidance conduits (NGCs) provide a promising platform for peripheral nerve repair through the integration of bioactive scaffolds, bi...
Article
Developing the recyclable elastomeric vitrimer with dynamic covalent bonds is a very promising strategy to alleviate the burden of traditional vulcanized rubber materials on the environment. In this work, we proposed to introduce epoxidized soybean oil (ESO) as a cross-linking agent into carboxyl nitrile butadiene rubber (XNBR)/TEMPO-oxidized cellu...
Article
To achieve high deformation under a low electric field intensity is still a big challenge for the dielectric elastomers (DE) potentially used in artificial electronic skin and artificial muscles. Herein, poly-dopamine (PDA) modified 1D barium titanate ([email protected]) nanofibers and 2D MXene nanosheets with high aspect ratio and large dipole mom...
Article
Owing to the development of nanotechnology and noninvasive treatment, thermal therapy in combination with external stimuli has been applied for tissue engineering and regenerative medicine (TERM), which has attracted more and more attention in recent years. In this review, the recent progress of applying a variety of non‐invasive thermal therapeuti...
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Theranostic systems that permit both diagnosis and treatment in vivo are highly appealing means by which to meet the demands of precision medicine. However, most such systems remain subject to issues related to complex molecular design and synthesis, potential toxicity, and possible photoactivity changes. Herein, we propose a novel supramolecular t...
Article
Polymer nanocomposites (PNCs) are now widely used in various fields. It is modified by adding fillers to improve its various properties during processing and application. In this work, we investigated the viscoelasticity of PNCs respectively filled with nanoparticles, nanorods and nanosheets and compared the effects of filler shape and filler size....
Article
For reducing volatile organic compounds (VOCs) emission in the preparation of “green tires” with ideal dynamic properties, Sulfurized Cardanol Polyoxyethylene Ether (SCPE), a VOC free bio-based coupling agent was designed and synthesized by using natural plant extracts as the main raw material. The structure of SCPE was confirmed by FT-IR, ¹H NMR,...
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In this work, the thermal transfer capabilities of spherical and laminar/spherical filled polymer nanocomposites (PNCs) were systematically investigated by using molecular dynamics (MD) simulation. The effects of various factors such as physical interfacial interaction, filler size and filler shape on the thermal conductivity were explored. The rel...
Article
There are increasing concerns about the global issues of carbon peak and carbon neutrality. The tire labeling laws about rolling resistance performance requirements have been revised accordingly. Energy-efficient “green tires,” with a lower rolling resistance, are becoming an important development direction for the tire industry. Herein, a method i...
Article
It is great significance to develop polymeric composites with effective heat dissipation and high electrical insulation for devices in electronics fabrication. Herein, we fabricated silicone rubber composites with large thermal conductivity (TC) and high electrical insulation by utilizing the synergistic effects of polydopamine (PDA) modification a...
Article
Tires are widely used in modern society and various industries. However, the formulations and manufacturing processes of traditional rubber are complex, and it is difficult to simultaneously meet requirements of low rolling resistance, high wet-skid resistance and wear resistance. Herein, we demonstrate a polyurethane elastomer material with high h...
Article
Traditional thermoset polymeric materials pose an enormous burden on the environment due to permanent covalent cross-links that make them difficult to reprocess or recycle. Herein, we describe the facile synthesis of recyclable, healable and reprocessable poly-dimethylsiloxane (PDMS)/cellulose nanocrystals (CNC) composites via engineering dynamic c...
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Skin wound healing often contains a series of dynamic and complex physiological healing processes. It is a great clinical challenge to effectively treat the cutaneous wound and regenerate the damaged skin. Hydrogels have shown great promise for skin wound healing through the rational design and preparation to endow with specific functionalities. In...
Article
Introducing polymeric nanoparticles into polymer matrices is an interesting topic, and the robustness of the polymeric nanoparticles is crucial for the properties of the polymer nanocomposites (PNCs). In this study, by incorporating star-shaped polymeric nanoparticles (SSPNs) into the polymer, the effect of the sphericity (η) and arm length (L) of...
Article
Full-text available
Vibration and noise are ubiquitous in social life, which severely damage machinery and adversely affect human health. Thus, the development of materials with high-damping performance is of great importance. Rubbers are typically used as damping materials because of their unique viscoelasticity. However, they do not satisfy the requirements of diffe...
Article
The static and dynamics behavior of the cis-1,4-polyisoprene during the glass transition is closely related to its macroscopic property, which will be significantly affected by the external pressure. Therefore, here an all-atom molecular dynamics simulation is performed to systemically investigate the effect of the pressure (P = 1–2000 atm) on the...
Article
Taraxacum kok-saghyz Rodin (TKS) is a promising alternative rubber-producing plant due to the high-quality natural rubber (NR) synthesized in its root. Nevertheless, the comprehensive molecular mechanisms of NR biosynthesis in TKS roots remains segmented and elusive. In the current study, to elucidate the regulatory mechanism of NR synthesis at the...
Chapter
Metal oxide materials with excellent properties are promising materials for various applications. Metal oxide with one-dimensional nanoarchitectures can provide a good material system to investigate the dependence of electrical, optical, thermal, and mechanical properties on dimensionality and size reduction. Metal oxide nanofibers can be fabricate...
Article
Stain-stress behavior of four types of polyethylene (PE), i.e. low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE) and high-density polyethylene (HDPE), under a wide strain rate ranging from 0.001 to 1000 s⁻¹, and the crystalline structures of corresponding fractured PEs were investigated. Re...
Article
In this study, we prepared a series of binary and ternary silicate/silicone elastomer dielectric composites with excellent actuation and energy storage performance by incorporating talc (Tl), wollastonite (Wl) and halloysite nanotube (HNT) into methyl vinyl silicone rubber (MVSR). Tl or Wl can act as physical barriers to prohibit HNT from aggregati...
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Hydrogenated Nitrile Rubber (HNBR) is widely used in aerospace, petroleum exploration and other fields because of its excellent performances. However, there remains a challenge of balancing the oil resistance and the low temperature resistance for HNBR. In this work, a series of grafted carboxyl nitrile rubber (XNBR) was prepared by the esterificat...