Liyan Liang

Liyan Liang
Guangzhou institute of Chemistry, CAS

About

105
Publications
9,475
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1,498
Citations
Citations since 2016
54 Research Items
1242 Citations
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400

Publications

Publications (105)
Article
Traditional epoxy thermosets have been extensively used in many fields, including the field of carbon fiber composite materials, which is favored by a large number of researchers. But they usually cannot be recycled under mild conditions. To make matters worse, the material loses its usefulness once it is damaged. Self-healing and degradable thermo...
Article
Epoxy resins are widely used for electronic packaging materials due to their good performance. A common way to cure epoxy is to add anhydride as a hardener, to this, we added a less used curing method, catalytic curing, to study their effect on the curing system and curd samples. Polymers containing naphthalene rings usually have low moisture absor...
Article
In recent years, the reversible addition reaction of isocyanates and active hydrogen compounds has aroused wide concern. The synthesis of a novel dynamic covalent system based on phenol-carbamate bonds (PCBs) and its application in the preparation of thermo-healing and recycled epoxy resins have become a research hotspot. Herein, a compound with a...
Article
Developing self-healable, recyclable and reprocessable polymer materials is one of the effective ways to relieve plastic pollution and save resources. Using dynamic reversible hindered urea bonds (HUBs) to construct self-healing materials have become a hot topic to investigate renewable materials. HUBs have a large substituent on its nitrogen atom,...
Article
Full-text available
The field of microelectronic devices and 5G communication has an increasing demand for polymer composites with low dielectric constant, low dielectric loss, and good hydrophobicity. However, traditional polymer composites cannot simultaneously satisfy them, which severely hinders their application. In this work, a liquid crystal epoxy resin (LCE4)...
Article
Full-text available
The purpose of this paper was to evaluate the feasibility of MXenes (Ti3C2Tx) enforcing corrosion resistance performance and thermal stability of waterborne polyurethane (WPU). Firstly, the Ti3C2Tx was modified by hydrolysis of titanium butoxide (TBOT) and the 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane. Then, the modified Ti3C2Tx (SiOx/TiO2@Ti3C2...
Article
The fabrication and development of excellent thermoset polymers with self-healing and shape memory properties is highly desirable. Herein, a novel high-strength epoxy resin (EP-SeSe) with diselenide bonds was rationally designed for rapid repair materials in building constructions and electrical packaging. The resultant resins exhibit excellent sha...
Article
Full-text available
Traditional epoxy resin materials are widely used in coatings, composite materials, electronic packaging materials, etc. They are usually made of unsustainable fossil resources and cannot be recycled under mild conditions. Degradable thermosetting resins with dynamic covalent structure provide a potential solution to this conflict. In this paper, u...
Article
This paper explored that the novel waterborne polyurethane (WPU) composite coatings with superior corrosion protection performance was fabricated via intercalating functionalized graphene oxide (GO). The eco-friendly and superhydrophobic aminoethyl aminopropyl isobutyl polyhedral oligomeric silsesquioxane (POSS-NH-NH2) was applied to modify GO via...
Article
MXenes (Ti3C2Tx), an emerging two-dimensional (2D) material, derived from MAX phases, may have outstanding corrosion resistance performance due to its sheet property. However, pristine Ti3C2Tx is inappropriate to be used directly as an anti-corrosion filler, owing to the existence of hydrophilic groups. Herein, few-layered Ti3C2Tx sheets were modif...
Article
To efficiently disperse micro/nano thermally conductivity (TC) fillers without pretreatment is still considered as a major technical issue to prepare high TC polymeric composites. Here, a new bio-based epoxy thermoset (BE) that contains the Schiff base structure was synthesized. BE/GNP (graphite nanoplatelets) powder with microcapsule structure was...
Article
Here, high thermally conductive polydimethylsiloxane(PDMS) composites containing undamaged covalent-functionalized graphene(f-G) nanoflakes via novel hydroxylation graphene method and 3-methacryloxypropyltrimethoxysilane(KH-570) grafting was prepared. KH-570 was decorated on graphene to ensure good dispersion and interface compatibility in PDMS mat...
Article
MXenes (Ti3C2Tx), a novel two-dimensional (2D) material, exhibits higher application potential in many fields due to the layered-structure and other unique characteristics. Here, the few-layer Ti3C2Tx is successfully fabricated via etching and ultrasonic. The [3-(2-Aminoethyl) aminopropyl] trimethoxy silane (silane coupling agent, AEAPTES) is used...
Article
This work successfully synthesized γ-(2,3-glycidoxy) propyltrimethoxysilane (GPTS) functionalized silica nanoparticles (GSiO2). The obtained GSiO2 was grafted onto lysine-modified graphene oxide (LGO) by covalent bonding to prepare GLGO nano-hybrid material, and then the prepared GLGO nano-hybrid material was used as a nano-filler for the waterborn...
Article
In this work, an amino-terminated polyether (ATP) was synthesized and used for the functionalization of GO to obtain an amino-terminal polyether-functionalized graphene oxide (FGO). The structure of FGO was characterized by FTIR, Raman, XPS, XRD, AFM, SEM and TGA. And then the FGO was incorporated into waterborne epoxy resin (WEP) to prepare FGO/WE...
Article
Corrosion protection of water-borne polyurethane (WPU) containing phytic acid-decorated graphene oxide (PG) for Q235 steel was investigated in this work. Natural and non-hazardous phytic acid (PA) was applied to modify graphene oxide (GO) for enhancing its dispersion and compatibility with WPU. The results of Fourier transform infrared spectroscopy...
Article
In this study, a carboxymethyl chitosan functionalized graphene (CMCS-rGO) nanomaterial was successfully synthesized in aqueous solution by non-covalent functionalization method. Fourier transform infrared, Raman, ultraviolet visible spectroscopy and thermogravimetric analysis confirmed that carboxymethyl chitosan had been successfully anchored on...
Article
Vitrimers with dynamic imine bonds generally show low mechanical properties and water resistance. Here, we report a bio-based vitrimers with dynamic imine bonds synthesized from vanillin, m-xylylenediamine and DGEBA. Among them, the imine metathesis reaction of the dynamic imine bond makes the bio-based vitrimers have rapid stress relaxation behavi...
Article
Waterborne polyurethane (WPU) composites containing polyether amine functionalized graphene oxide (PAFG) were successfully fabricated via the in situ polymerization. The hydrophobicity, thermal stability, mechanical and anti-corrosion properties of WPU and WPU composites were investigated. As a result, the properties of WPU composites, such as hydr...
Article
The booming of modern electronic devices featuring increasing power and multi‐functionalization demands novel high thermal conductive materials with various functions, such as self‐healing property and high deformability, while traditional polymer‐based or metallic‐based materials could hardly provide. Therefore, we report a high thermal conductive...
Article
In this paper, various fabrics with good self-cleaning performance were prepared via a facile dip-coating method. The fabrics composed with different fibers and woven techniques were firstly immersed in ZnO sol to increase the surface roughness, then dip-coated in fluoroalkylsilane (HFT) solution to reduce the surface energy. The coated fabric show...
Article
Full-text available
Designing ordered fillers arrangement and superior interfacial adhesion between fillers and matrix can improve the thermal conductivity (TC) of composites. Here, bioinspired dopamine chemistry was firstly used to reduce graphene oxide (GO) and introduce polydopamine nanoparticles on the surface of GO. Then, a well-aligned epoxy/reduced GO films (EP...
Article
In this work, phosphomolybdic acid (PMoA) was used as a kind of eco-friendly flame retardant precursor. Then, a green intrinsic flame retardant was successfully prepared by chemically modifying PMoA with imidazolium (IM), which can be well dispersed in epoxy matrix without using any solvent. DSC results demonstrated that IM-PMoA can chemically reac...
Article
In this study, the silica network and functionalized graphene oxide (GO) were incorporated into the epoxy coating systems, which was aimed to improve the thermal property and corrosion resistance of epoxy coatings. First, tetraethyl orthosilicate (TEOS) oligomers and epoxy hybrid was fabricated through sol–gel method. Then the (3‐aminopropyl) triet...
Article
Thermally degradable thermoset acrylate-epoxy resins with thermal cleavable groups had been prepared by a series of acrylate-epoxy pre-polymers which was cured with 4-methyl hexahydrophthalic anhydride (MHHPA). The acrylate-epoxy pre-polymers were synthesized via the radical polymerization of 3, 4-epoxycyclohexylmethyl methacrylate (EMA) with butyl...
Article
Herein, h-BN powders were sonicated in an aqueous solution of polyethylenimine (PEI) to simultaneously exfoliate and functionalize h-BN nanosheets with Lewis acid-base interaction. The structure and morphology of PEI modified h-BN nanosheets (PEI-BNNSs) were characterized by FTIR, TGA, AFM and TEM. The as-prepared PEI-BNNSs were served as anticorro...
Article
Polysiloxane-based polyurethane/lignin elastomers are synthesized via pre-polymerization. Isophorone diisocyanate (IPDI) reacts with polycarbonate (PCDL) and polydimethylsiloxane (PDMS) polyol to produce a linear thermoplastic elastomer. Lignin is added to the matrix of the polyurethane, where lignin not only acts as a crosslinking agent but also a...
Article
Full-text available
In this work, we proposed a mild and fluorine-free strategy for fabricating robust superhydrophobic coatings with TiO2, 3-mercaptopropyltriethoxysilane (MPTS) and polyhedral oligomeric silsesquioxanes using dip-coating and thiol-ene click reaction. The modified cotton exhibited superb superhydrophobicity with a WCA of 157.6°, which showed anti-wett...
Article
Polysiloxane-based polyurethane films with cross-linked structure are synthesized by the sol-gel process using isophorone diisocyanate (IPDI), polydimethylsiloxane (PDMS), polycaprolactone (PCL) diol, and 3-aminopropyl triethoxysilane (ATS). After the ATS-terminated polyurethane prepolymer, a cross-linked network structure is formed through the pro...
Article
A novel UV‐curable supramolecular waterborne polyurethane (PU) was prepared through the introduction of methylated‐β‐cyclodextrin (Me‐β‐CD). The host‐guest interactions between Me‐β‐CD and photosensitive monomer (PM) were further investigated by 1HNMR and fluorescence spectroscopy, where the corresponding equilibrium constant was also calculated. C...
Article
Constructing layer-by-layer framework is a highly efficient strategy for preparing the excellent performance thermal management materials. In this report, thermal oxidation and ultrasonic exfoliation of hexagonal boron nitride can prepare hydroxylated boron nitride nanosheet (BNNS-OH). BNNS-OH layer and CNF layer are assembled respectively on the C...
Article
In the past decades, graphene oxide (GO) exhibited great potential for enhancing the performance of polymer composites. Homogeneous dispersion of GO sheets in the polymer matrix was still a main challenge for the application of GO materials. In this paper, the polyacrylate functionalized GO (PA-GO) was prepared through free-radical copolymerization...
Article
A biphenyl type liquid crystal epoxy (LCE) monomer 4,4′‐di(2,3‐epoxyhexyloxy)biphenyl (LCBP4) containing flexible chain was synthesized and the curing behavior was investigated using 4,4′‐diaminodiphenylmethane (DDM) as the curing agent. The effect of curing condition on the formation of the liquid crystalline phase was examined. The cured samples...
Article
Waterborne difunctional polyacrylate with long fluorinated side chains and epoxy groups (WALF) was successfully synthesized and used as emulsifier and reactive surface modifier for epoxy resin. The structure of WALF was characterized by FTIR and ¹H NMR. In order to investigate the effect of the length and the content of the fluorinated side chains...
Article
Despite the existing efforts, developing a versatile and less-harmful method is of difficulty for the preparation of durable superhydrophobic surfaces. Herein, a mild and water-rich approach is proposed to obtain fluorine-free robust superhydrophobic materials, which is prepared using composite solutions of polydimethylsiloxane (PDMS) and titanium...
Article
In this contribution, a green nanocomposite consisting of casein phosphopeptide-biofunctionalized graphene oxide nanoplatelets (CPGO) and cellulose nanofibers (CNFs) was fabricated via vacuum-assisted self-assembly technique. A ‘natural nacre’ and strong hydrogen bonds network structure was constructed by CNFs and CPGO. In this architecture, the sc...
Article
Although the development of constructing oil-water separation materials is quick, the defects of using harmful regents, weak stability and single function still exist. Here, we report an effective and less-harmful system with poly-dimethylsiloxane (PDMS)/ZnO composite solution to fabricate robust superhydrophobic surfaces for oil-water separation a...
Article
In this study, in order to improve the hydrophobicity and corrosion protection of epoxy coatings, a fluorinated polyacrylate polymer containing epoxy groups (PFEMA) was designed and used to modify epoxy resin. FT-IR, ¹H-NMR and GPC were employed to characterize the structure of PFEMA polymer. Contact angle (CA), X-ray photoelectron spectrum (XPS),...
Article
Full-text available
In this work, a cycloaliphatic epoxy resin hexahydrophthalic acid bis (3, 4-epoxycyclohexylmethyl) ester (BE) was prepared and cured with anhydride. The curing kinetics and properties of the cycloaliphatic epoxy resin were characterized and compared with the (3’, 4’-epoxycyclohexane) methyl-3, 4-epoxycyclohexyl-carboxylate (CE) and bis (3, 4-epoxyc...
Article
Two liquid crystalline epoxies containing biphenyl ether and aromatic ester mesogenic units, oxybis(4,1-phenylene)bis(4-(oxiran-2-ylmethoxy)benzoate)(LCE1) and oxybis(4,1-phenylene) bis(4-(4-(oxiran-2-yl)butoxy)benzoate)(LCE2), were synthesized and characterized. Subsequently, the epoxy monomers were cured with diaminodiphenylsulfone (DDS). From DS...
Article
A hyperbranched polyester polythiol(H20-SH) was synthesized and characterized by FTIR spectral analysis, ¹H-NMR spectral analysis and GPC analysis. H20-SH was added into the formulation of UV-curable epoxy acrylate networks based on thiol-acrylate chemistry. The effects of H20-SH on polymerization kinetics, thermal and mechanical properties of thio...
Article
A pyridine-containing diamine, 4,4′-bis(5-amino-2-pyridinoxy)diphenyl ether, was prepared via a two-step procedure. Based on the diamine, a series of polyimides were prepared by traditional two-step method. The characteristic peaks of polyimides on their fourier transform infrared (FI-IR) spectra indicated full imidization. Thermogravimetric analys...
Article
In this work, liquid crystalline epoxies with lateral substituents were synthesized and cured with aromatic amines or anhydride. The liquid crystalline phase structure of liquid crystalline epoxies with lateral substituents was determined by polarized optical microscopy. The relationship between thermal conductivity and dielectric properties and li...
Article
A lateral phthalonitrile functionalized main-chain polybenzoxazine precursor has been successfully synthesized. The structure was characterized by proton nuclear magnetic resonance (1H NMR) and Fourier transform infrared (FTIR). The formation of benzoxazine rings were confirmed by the characteristic resonances observed at about 4.55 (C-CH2-N) and 5...
Article
The dimethacrylate reactive diluent (HEMA-DDSA), a long-side-chain-containing reactive diluent, was prepared by reacting 2-dodecen-1-ylsuccinic anhydride with two equivalents of hydroxyethyl methacrylate. Its structure was characterized by IR and 1H NMR spectroscopy. This new diluent was added into the formulation of UV-curable epoxy acrylate netwo...
Article
A series of novel thermoresponsive biodegradable hydrogels (TBHs) was prepared from N-isopropyl acrylamide (NIPAM) and two biodegradable crosslinkers, poly(ε-caprolactone) dimethacrylate (PCLDMA) and bisacryloylcystamine (BACy). The morphology, thermal behavior, swelling/deswelling kinetics, compression properties, in vitro drug delivery and biodeg...
Article
A series of novel type bisphthalonitriles with different molecular weight main-chain polybenzoxazines as linkages have been successfully synthesized using 4, 4′-diaminodiphenyl methane, paraformaldehyde, bisphenol A and 4-nitrophthalonitrile as initial materials. The structures were characterized by Fourier transform infrared (FT-IR) and proton nuc...
Article
Full-text available
In this work, a series of high thermal conductivity epoxies containing substituted biphenyl mesogenic were prepared and characterized. The liquid crystalline phase structure of substituted biphenyl epoxies was determined by polarized optical microscopy. Differential scanning calorimetry and thermogravimetric were used to characterize the thermal pr...
Article
A heat-resistance monomer denoted as triazine heterocyclic compound (TGIC-AA) was synthesized and applied into improving the thermal stability of solvent-based acrylic pressure sensitive adhesives (PSAs) through copolymerization. The modified acrylic PSAs tapes possessed longer holding time at temperature up to 150°C and no large areas of residues...
Article
Full-text available
In this work, a series of low dielectric constant hydrophobic epoxies based on substituted biphenyl mesogenic were prepared and characterized. The liquid crystalline phase structure and the crosslink density of substituted biphenyl epoxies were determined by polarized optical microscopy, wide angle X-ray diffraction measurements and dynamic storage...
Article
Full-text available
In this work, a novel epoxy monomer denoted as 3,5'-Di-t-butyl-5,3'-dimethyl biphenyl diglycidyl ether (t-BuMBPDGE) was synthesized and applied into situ composites with 3,3’,5,5’-tetramethyl- 4,4’-biphenyl Diglycidyl ether (TMBPDGE), accompanied with curing agent aromatic amines. The liquid crystalline phase structure and the crosslink density of...
Article
In this work, novel thermoresponsive shape memory composites based on glass fiber and nanosilica-modified liquid crystalline epoxies (LCEs) with lateral substituent were prepared and characterized. According to the comprehensive analysis of polarized optical microscopy, wide-angle X-ray diffraction measurements, and tan δ data, the orientation of m...
Article
Cellulose whisker (CW) is employed as a novel carbonization agent to build green and efficient intumescent flame retardant (CWAPP) with ammonium polyphosphate (APP). Due to the presence of CW, CWAPP exhibits more excellent flame retardancy compared with APP in rigid polyurethane foam (PU). PU-added CWAPP (PU/CWAPP) obtains higher LOI value than tha...
Article
A novel thermal stability and highly transparent silicone resin-type material was prepared via hydrosilylation of vinyl-polyhedral oligomeric silsesquioxanes (POSS)-grafted methylhydrosilicone oil and vinylmethylsilicone oil in the presence of Karstedt catalyst. The morphology, mechanical property, thermal stability, optical transmittance, thermal-...
Article
In this work, a high performance liquid crystalline epoxy composite was prepared and the effect of the alignment of LCE with long lateral substituent on the carbon fiber surface curing at low temperature on fracture toughness, dynamic mechanical, and thermal properties of liquid crystalline epoxy with lateral substituent (LCE6) was investigated by...
Article
The objective of this study is using 2,4,6-trimethylolphenate (TMP) as modifier to prepare stable TMP-Urea-Formaldehyde resins (TMPUF) with low formaldehyde emission and using TMPUF to improve mechanical properties and water resistance of the common filter paper. The prepared TMPUF was characterized by IR, DSC and POM. The results indicated that as...
Article
Three Novel Eu-polymers containing hole transporting units and light-emitting units in the mainchain had been designed and synthesized via radical copolymerization of N-vinylcarbazole and polymerizable Eu(TTA)3vinyl-tpy. The chemical structure and composition of the Eu-polymers were characterized by FTIR, UV-vis, 1H NMR, 13C NMR spectroscopy, GPC,...
Article
Two novel cyclometalated iridium(III) complexes, Ir(pcl)2(pic) and Ir(pcl)2(fpic) (pcl: 3-phenylcinnoline, pic: picolinic acid, fpic: 5-fluoro-2-picolinic acid) were synthesized and characterized by FTIR, 1H NMR spectroscopy, UV-vis, PL, and MALDI-TOF. These two Ir-complexes geometry were predicted using the Sparkle/PM6 model and suggested to a che...
Article
A novel Eu-complex Eu(TTA)2vinyl-phen has been designed and synthesized via simple reaction as an efficient fluorescent sensor for F−, CH3COO−, and H2PO4−. The anion-sensitivity of Eu-complex was evaluated using a series of anion in DMSO solution. On binding with F−, CH3COO−, or H2PO4−, fluorescence quenching of Eu-complex was easily observed, whil...
Article
This work investigates and discusses the thermal, mechanical, thermo-mechanical properties and the morphology of solvent cast products from polylactide (PLA) and polycaprolactone (PCL), as well as their blends containing ethyl cellosolve blocked polyisocyanate (EC-bp), which was introduced as a crosslinker. Differential scanning calorimetry (DSC) a...
Article
Full-text available
Two novel trinuclear europium complexes based on trisphen(1,3,5-tris{4-((1,10-phenanthroline-[5,6-d]imidazol-2yl)phenoxy)methyl}-2,4,6-trimethyl-benzene) as a second ligand were designed, synthesized, and characterized by FT-IR, (1)H NMR, UV-visible, photoluminescence (PL) spectroscopy, elemental analysis (EA) and ESI-MS. The geometries of these tw...
Article
Two bipolar Alq3-based complexes, tris{5-[(carbazole-9'-yl)methyl]-8-hydroxyquinoline} aluminum (Al(CzHQ)3) and tris{5-[(phenothiazine-9'-yl)methyl]-8-hydroxyquinoline} aluminum (Al(PHQ)3), involving an Alq3-center and three hole-transporting substituents (carbazole or phenothiazine), were prepared and characterized. Effects of hole-transporting su...
Article
In this work, microporous membrane biomaterials based on high weight molecular polylactide (PLA) and low molecular weight poly(ethylene glycol) (PEG) using rapid solvent evaporation method were prepared and investigated. The effect of PEG segments added on the thermal and degradation behaviors was studied. According to the results, produced PLA/PEG...