Jian Kang

• PhD
• Professor (Associate) at Sichuan University

The effects of ultrasonic irradiation on conformation and crystalline structure of isotactic polypropylene (iPP) and β-isotactic polypropylene (β-iPP) were studied by means of Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD). The results demonstrate that ultrasonic irra...

The azido propellant, with high energy and low signature, has been a hotpot in the field of propellants. However, the risk of low heat resistance and mechanical performance restricts their range of applications in high-energy formulations. In this study, four azido propellants based on 3,3-bis (azidomethyl) oxetane-tetrahydrofuran copolyether (BAMO...

Polyolefin separators with worse porous structures and compatibilities mismatch the internal environment and deteriorate lithium-ion battery (LIB) combination properties. In this study, a sulfonated SiO2 (SSD) composited polypropylene separator (PP@SSD) is prepared to homogenize pore sizes and in situ-built SSD coatings on porous skeletons. Importe...

Polyethylene‐supported nanofiltration (NF) membranes have been reported for several cases in recent years. However, few have disclosed a NF membrane which achieves a high salt/water separation efficiency. Here, a novel polyamide NF membrane was prepared by conducting interfacial polymerization on poly(vinyl alcohol)‐decorated polyethylene separator...

In this study, graphene oxide (GO) was modified via electrostatic interactions and chemical grafting by silica (SiO2), and two SiO2@GO hybrids (GO-A and GO-B, respectively) with different structures were obtained and carefully characterized. Results confirmed the successful grafting of SiO2 onto the GO surface using both strategies. The distributio...

The development of thin‐film nanocomposite (TFN) membranes with high performance is conducive to efficient desalination and wastewater treatment. In this work, dendritic mesoporous silica nanoparticles (DLSiO2) were synthesized by a dual‐templating strategy. Afterward, they were introduced into the aqueous phase to fabricate TFN membranes via in si...

To study the effect of molecular structure on ethylene‐vinyl alcohol copolymer (EVOH) thermal stability during processing, EVOH samples with different molecular weights and comonomer distributions were prepared by solubility fractionation from two different commercial materials, and then, the structure features of samples were characterized by ¹H‐N...

Correction for ‘Effects of graphene oxide size on curing kinetics of epoxy resin’ by Xuebing Chen et al., RSC Adv., 2021, 11, 29215–29226, https://doi.org/10.1039/D1RA05234A.

In this manuscript, nanofillers of graphene oxide (GO) and cellulose nanocrystal (CNC) with different weight ratios (G/C ratios), named GC 2:1, GC 4:1, GC 8:1, GC 16:1, and GC 32:1, were successfully prepared. Characterization methods such as Raman spectroscopy, X-ray photoelectron spectrometry (XPS), and thermogravimetric analysis (TGA) were perfo...

Uneven separator porous construction inevitably raises lithium‐ion migration barriers within the separator and thus limits overall lithium‐ion battery (LIB) performance. In this research, serial LIB separators with various porous constructions were prepared precisely by adjusting the synchronous bidirectional drawing temperatures to confirm the bid...

Uneven porous channels tend to undergo structure-determined chemical deterioration as lithium-ion battery (LIB) operates, which may restrict lithium-ion migration behaviors within the separator and deteriorate cell performances. This research precisely regulates β-phase polypropylene crystal texture and porous channels after biaxial stretching base...

Uneven porous channels tend to undergo structure-determined chemical deterioration as lithium-ion battery (LIB) operates, which may restrict lithium-ion migration behaviors within the separator and deteriorate cell performances. This research precisely regulates β-phase polypropylene crystal texture and porous channels after biaxial stretching base...

Graphene oxide has a strong tendency to agglomerate in polymers that are only hydrogen bonded acceptors due to the strong hydrogen bonding and van der Waals forces between its lamellae, which greatly limits its application. In this work, Silica (SiO2) was introduced on the surface of graphene oxide (GO) by hydrolysis of tetraethoxysilane (TEOS). Gr...

Poly-l-lactic acid (PLLA) is a biodegradable polymer with great mechanical properties and good transparency, but its low crystallization rate greatly limits its application. Hyperbranched polyesters (HBPs) modified carbon nanotubes (CNTs) are an ideal nucleating agent to prove the crystallization of PLLA. To compare different terminal group HBPs' e...

Poly(lactic acid) (PLA) biaxially stretched films and graphene oxide-silica nanohybrids (GO-SiO2)/PLA nanocomposite biaxially stretched films (PGSi) with different stretching ratios were prepared by simultaneous biaxial stretching. The structural changes during biaxial stretching have a direct impact on the properties of the biaxially stretched fil...

To meet the larger-scale freshwater demand, it is necessary to develop advanced thin-film nanocomposite (TFN) membranes with favorable separation performance and anti-fouling capacity. In this study, hydrophilic modified polydopamine nanoparticles (PDNPs) were synthesized by the co-polymerization of alkaline l-Arginine (Arg) with dopamine (DA). Sub...

Inspired by biological aquaporins, artificial water channels (AWCs) can achieve high-performance for thin-film composite (TFC) reverse osmosis (RO) membranes. In our work, two types of liposomes (C18lyso and D5A liposomes) with superior permeability serving as AWCs were designed by regulating the molecular structures of lipids, in which D5A liposom...

Polyphenylene sulfide (PPS) is one of most widely used special engineering plastics in the world. However, owing to the unique memory effect and thermal degradation effect, the crystalline structure of PPS is extremely difficult to control during the practical processing, resulting in the deterioration of processability and performance of PPS produ...

Thermally induced phase separation technique has been widely applied to produce various commercial high-density polyethylene (HDPE) membranes based on the HDPE/diluent system. In this work, the crystallization behavior and morphological evolution of HDPE/liquid paraffin (LP) blends were systematically investigated by differential scanning calorimet...

Poly-L-lactic acid (PLLA) is an environmentally friendly and renewable polymer material with excellent prospects, but its low crystallization rate greatly limits its application. Through the amidation reaction between amino hyperbranched polymer (HBP N103) and carboxylated carbon nanotubes (CNTs), CNTs-N103 was obtained. The modification was confir...

In this article, the nanofillers of graphene oxide (GO) and cellulose nanocrystal (CNC), which called GC, was prepared. The X‐ray photoelectron spectrometer (XPS), Raman spectra, thermogravimetric analysis (TGA) and transmission electron microscopy (TEM) were carried out for its characterizations. Besides, its influences on mechanical properties, t...

Thermal degradation occurs inevitably during the practical processing of poly(phenylene sulfide) (PPS) due to its low thermal stability, leading to the deterioration of processability and performance of PPS products. In this study, the structural evolution of PPS during thermal degradation in nitrogen (N2) and oxygen (O2) atmospheres are investigat...

Booming aspiration of advanced energy storage equipment elevates lithium-ion batteries vastly. Whereas separator with inferior porous structure and compatibility mismatches battery internal medium and raises ion transference rampart. Herein, fumed SiO2 compound separator is designed via ingenious bidirectional drawing technique to optimize the poro...

Superior permeability and high selectivity are crucial performances criterion for reverse osmosis (RO) membranes. Inspired by aquaporin-based biomimetic membranes, the loose liposomes as artificial water channels were prepared by thin-layer hydration method with lyso-phospholipids (C14lyso) and cholesterol followed by incorporating liposomes into t...

The thermal shutdown of the separator is the crucial feature for hindering thermal runaway of lithium-ion batteries. Because the temperature within the cell continues to rise rather than drop immediately after shutdown, the separator should be capable of maintaining adequate dimensional stability up to a specific range above the shutdown temperatur...

In this study, one of the commonly used MXene (Ti3C2Tx) and β nucleated isotactic polypropylene (β-iPP)/MXene composites of different compositions were fabricated. The effects of MXene on non-isothermal crystallization and polymorphic behavior of β-iPP/MXene composites were comparatively studied. The non-isothermal crystallization kinetics indicate...

Growing desire for high-performance improves lithium-ion batteries. But separator exhibits poor electrolyte compatibility owing to intrinsic hydrophobicity feature and weak compression resistance caused by inferior microporous structure, which raises lithium-ion migration obstacle. In this article, polyethylene/poly (vinyl alcohol) (PE/PVA) composi...

The influence of hydrogenated petroleum resin E5415 on the crystallization behavior, crystallization kinetics and mechanical properties of polyethylene for biaxially stretched films were systematically investigated by differential scanning calorimetry, small-angle X-ray scattering, wide-angle X-ray diffraction, melt flow index measurements and tens...

The surface pore size and structure, as well as the hydrophilicity/hydrophobicity characterization of support layer are vital factors that affect the formation process of polyamide selective layer via interfacial polymerization. In this research, polysulfone support layers with similar pore structures but different hydrophilicity were prepared. Int...

To study the effects of graphene oxide (GO) size on the curing kinetics of epoxy resin (EP), two kinds of GO were selected and characterized by Fourier transform infrared spectrometry (FT-IR), FT-Raman spectrometry (FTIR-Raman), thermo gravimetric analysis (TGA), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray diffract...

The effects of MXene on the crystallization behavior of β-nucleated isotactic polypropylene (iPP) were comparatively studied. The commonly used MXene Ti3C2Tx was prepared by selective etching and its structure and morphology were studied in detail. Then MXene and a rare earth β-nucleating agent (NA) WBG-II were nucleated with iPP to prepare samples...

Nowadays, the rapid development of lithium-ion batteries (LIBs) leads to an urgent demand for the separator with excellent mechanical and electrochemical performances. In this work, the ultra-high molecular weight polyethylene (UHMWPE)/liquid paraffin (LP) gel film and the film after extraction of LP are prepared respectively. Due to the identical...

MXenes, a family of two-dimensional transition-metal carbides/nitrides, have attracted great attention and shown promising application in polymer composites. In this study, a typical MXene Ti3C2Tx was prepared by selective etching. The structure and morphology of Ti3C2Tx were studied by X-ray diffraction (XRD), scanning electron microscopy, and tra...

Anti‐fouling properties are tightly related to the surface properties of reverse osmosis (RO) membranes. In our study, fluorinated polyethyleneimine (FPEI) was synthesized by introducing perfluoroalkyl groups into a hydrophilic polyethyleneimine (PEI) matrix, and the heterogeneous wettability surface with hydrophilic and low‐surface‐energy properti...

Poly-l-lactic acid (PLLA) is a prospective renewable and degradable material, but slow crystallization limits its processing and application. By dehydration condensation of hydroxyl-terminated hyperbranched resin (H202) and carboxylated carbon nanotubes (CNTs), a modified CNT, CNTs-H202, was obtained. Grafting was confirmed by Fourier transform inf...

In this research, multi-layer co-extrusion technology was adopted to prepare Polypropylene random copolymer (PPR)/Polyethylene of raised temperature resistance (PERT) composite pipes. The structures and mechanical properties of PPR/PERT composite pipe were investigated by scanning electron microscopy (SEM), Dynamic thermomechanical analysis (DMA) a...

In this article, oriented β isotactic polypropylene (β‐iPP) with different aggregation structures were prepared by shearing and adding different β nucleating agents. It is found that the formation mechanism of oriented β‐iPP is nucleating agent induced and their crystalline structures strongly depend on the assembly of β nucleating agents. In the c...

Three most commonly used commercial polymer separators are selected to investigate the relationship between microstructure and performance of lithium-ion battery separators. The mechanical behavior and failure modes of separators in all probable loading conditions are compared. The scanning electron microscopy, two-dimensional wide-angle X-ray diff...

In this work, the lamellar structural evolution and microvoids variations of β polypropylene (β-PP) during the processing of two different stretching methods, sequential biaxial stretching and simultaneous biaxial stretching, were investigated in detail. It was found that different stretching methods led to significantly different lamellae deformat...

In the original version of this article, Fig. 2 was inadvertently published with errors. The original version of Fig. 2 has been corrected by publishing this correction article. The correct results of Fig. 2 are shown as follows.

In this paper, the lamellar structural evolution and microvoids variations of β-iPP during the processing of two different stretching methods, sequential biaxial stretching and simultaneous biaxial stretching, were investigated in detail. It was found that different stretching methods led to significantly different lamellae deformation modes, and t...

Two different supermolecular structures of β-iPP cast films were used to investigate structural evolution during the simultaneous biaxial stretching process via small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy. Based on the mechanical behaviors and porosity variations during...

In the original article, there is an error in Fig.

An unusual delamination phenomenon on three kinds of lithium‐ion battery separators was investigated in this study, which is closely associated with the compression resistance of the separator. The delamination trends of three kinds of polymer separators were analyzed systematically. Scanning electron microscopy, two‐dimensional wide‐angle X‐ray di...

In this study, polypropylene with different molecular structures was selected to clarify the relationship between the molecular structure and crystal structure during the extrusion of the dry process. The pore formation process was further investigated. The test results of thermal analysis, two‐dimensional wide‐angle X‐ray diffraction, two‐dimensio...

Cast films, based on β-iPP, were prepared via melt extrusion, and, then annealed at different temperature. The effect of annealing on the properties of the cast films, as well as on microvoid formation and evolution was investigated. After annealing, the initial lamellar structure was improved, and more secondary crystals were formed which decrease...

Two polypropylene precursor films with various die draw ratios (DDR) are made by melt extrusion. The crystal structure evolution analysis during annealing show that two precursor films have identical long periods and lamellae thickness but different lateral dimensions and tilted states of lamellae. Lower DDR generates shorter lateral dimension and...

In this research, a new kind of anti-fouling ultrafiltration (UF) composite membrane was fabricated by decorating poly (vinyl alcohol) on both the surface and cavities of a commercialized polyethylene (PE) separator. Zwitterionic l-cysteine was further tethered onto the composite membrane by “thiol–ene” click chemistry for pursuing enhanced anti-fo...

To investigate the influence of molecular structure of isotactic polypropylene (iPP) on the crystallization behavior and mechanical properties of its β-nucleated product, in this study, four iPP samples were selected. Results of molecular structure characterizations revealed that the molecular weight of the iPP resins are close, while the average i...

Solution-processable V2O5 nanobelts are successfully synthesized by a very simple and large-scale solution treatment method using commercial bulk V2O5 powders as precursor. The prepared V2O5 nanobelts with lengths up to 20 μm, widths of 10–30 nm, and aspect ratio of over 1000 displays excellent electrochromic and electrochemical capacitance perform...

Polyamide (PA) thin film composite reverse osmosis (RO) membranes have been extensively used in desalination industry today. However, the poor chlorine resistance and anti-fouling properties greatly limit the wide application of RO technology. Grafting or coating hydrophilic materials on the RO membrane surface may optimize its performances. Howeve...

Electrochromic displays have attained considerable attention attributed to the low energy consumption and open-circuit memory effects. However, the low optical contrast and slow response speed have limited their application fields. To overcome these deficiencies, we focus on the preparation of solution-processable nanostructured electrochromic mate...

The solution-processable silica/poly(o-methoxyaniline) (SiO2/PMOANI) nanocomposites were prepared by chemical oxidative polymerization for the first time. The SiO2/PMOANI film electrode was fabricated by spraying nanocomposites dispersion onto ITO conductive glass. A large optical contrast (77.1% at 700 nm), fast switching speed (910 ms for bleachi...

In this article, the melt and crystallization kinetics of poly(phenylene sulfide) (PPS) powder was studied by differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FTIR) and polarized optical microscopy (POM). It is found that the folded-chain crystals of PPS (melting point at 281 °C) could be erased at about 350 °C, whi...

The solution-processable three-dimensional honeycomb-like poly(3,4-ethylenedioxythiophene) (H-PEDOT) nanostructure networks were fabricated by hard template method for the first time. The morphology, structure and electrochromic performance of the H-PEDOT nanostructures were characterized. Compared with pure PEDOT film, the H-PEDOT nanostructured f...

In this article, the unusual delamination phenomenon of LIBs separator prepared by wet process is reported. Meanwhile, a cunning tearing test is proposed to quantify the delamination trend from the energy point of view and the effects of tearing rate and temperature on delamination trend of separator was researched. The increasing temperature makes...

In this article, hyperbranched polyester grafted graphene oxide (GO) was successfully prepared. X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and transmission electron microscopy (TEM) were performed for its characterizations. On the other hand, differential scanning calori...

A facile route for fabrication of polypropylene separators for lithium ion batteries with high elongation and strong puncture resistance has been proposed in this work. Polypropylene separators immersing in paraffin wax have been prepared to introduce small molecules into separators. The influence of small molecules on mechanical properties of sepa...

Monodisperse silica (SiO2) with an average diameter of 67 nm was synthesized by modified stober method. Monodisperse silica/poly(3,4-ethylenedioxythiophene) (SiO2/PEDOT) core/shell nanospheres were prepared by chemical oxidative polymerization. The PEDOT hollow nanospheres were successfully synthesized by etching the SiO2/PEDOT nanospheres with hyd...

In this research, l-lysine was adopted as a new aqueous monomer to react with 1,3,5-benzenetricarbonyl trichloride (TMC) for the preparation of polyamide thin-film composite (PA TFC) membrane (denoted as l-lysine TFC membrane in our research) via interfacial polymerization method. A novel salt concentration sensitive charge-mosaic nanofiltration me...

In this paper, 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), which is an organic phosphonic acids (OPA), is selected as the protic media to prepare phosphonated proton exchange membranes based on polyvinyl alcohol (PVA) by solution casting technique. The obtained PVA membranes were characterized using fourier transform infrared (FT-IR) spectr...

Three polyethylene of raised temperature resistance (PE‐RT) materials have been used to explore the factors that cause the differences in crystallization kinetics and mechanical performance between different classes and between the same classes. 1‐PE‐RT and 3‐PE‐RT belong to the same class (type II) but with different comonomer, while 2‐PE‐RT (type...

Graphene oxide (GO)/polyaniline (PANI) composite nanoflakes were fabricated by chemical oxidative polymerization of aniline onto GO nanoflakes. The electrochromic properties and the electrochemical capacitive behaviors of the GO/PANI composite nanoflake film were investigated. The GO/PANI nanocomposite film exhibits excellent electrochromic and sup...

The application of a reverse osmosis (RO) membrane is greatly restricted on account of a trade-off between water flux and salt rejection, as well as poor anti-fouling properties. In order to improve the surface hydrophilicity of RO membranes, l-lysine (Lys) was grafted onto polyamide selective layers with the premise of maintaining the original sur...

To prepare polyamide thin-film composite reverse osmosis (PA-TFC-RO) membranes with high performance, l-arginine (Arg) was used as an additive in m-phenylenediamine (MPD) aqueous solution. Arg with active amine groups can react with 1,3,5-benzenetricarboxylic chloride (TMC) to be incorporated into the polyamide selective layer during interfacial po...

In this paper, the influence of ordered structure effects (OSE) on crystallization behaviors of β-nucleated isotactic polypropylene/graphene oxide (β-iPP/GO) composites with different thermal histories, which crystallized at a slow cooling rate (called SLOW), fast cooling rate (called FAST) and medium cooling rate (called MED), respectively, was st...

Two linear low-density polyethylene samples (PE-A and PE-B), with similar melt index and molecular weight but different molecular structures, were used to explore the structural evolution during sequential biaxial stretching. Only PE-A could be successfully stretched into a film with the biaxial draw ratio of 6×6. The inter-lamellae crossing adjace...

The increase of the permeability and antifouling properties of reverse osmosis (RO) membranes is always significant in desalination. In this study, zwitterionic amino acid l‐Arginine (Arg) is grafted onto the self‐made RO membrane by one‐step method to construct the zwitterionic surface for enhancing the performances of the membranes. X‐ray photoel...

The developments of inexpensive, lightweight, low-power and flexible electrochromic devices have gained considerable attention. In this respect, the flexible, patterned and electrochromic device was successfully assembled. The flexible indium tin oxide/polyethylene terephthalate (ITO/PET) was used as transparent conductive substrates. the spray-coa...

In this work, the silica/polyaniline (SiO2/PANI) and silica poly(3,4-ethylenedioxythiophene) (SiO2/PEDOT) core/shell composite nanoparticles were successfully synthesized by in situ chemical oxidative polymerization. The SiO2/PANI nanocomposite film was employed as the anodically coloring electrode, and the SiO2/PEDOT nanocomposite film was employe...