Hybrid sols of poly (vinyl alcohol) (PVA)/Silicon oxide-titanium oxide (SiO2-TiO2) were prepared with tetraethoxylsilane and tetrabutyl titanate as precursor using Sol-Gel method. PVA/SiO2-TiO2 hybrid fibers by drawing from the dip-coating method aging treatment. The spinnability was investigated. Spinnable time (t) spinnable length (l) increased either PVA content or molar ratio SiO2 TiO2. characterized Fourier transform infrared (FT-IR), Scanning electron microscopy (SEM), X-ray...

In this study, distilers' grains were used to prepare biochar, then cuprous oxides nanoparticles firstly loaded the biochar improve properties of Cu2O. The characterizations their structure and morphology show that Cu2O have been onto successfully biochar-based (Cu2O/biochar composites) larger specific surface area than pure nanoparticles. Their antibacterial activity against Escherichia coli (E. coli) was examined. results Cu2O/biochar composites superior performance which indicates existence can

Purpose The purpose of this paper is to prepare a kind novel multi‐layer core‐shell latex, and evaluate the effect preparation methodology. Design/methodology/approach Core‐shell poly(siloxane)/polystyrene/polymethyl methacrylate (PSi/PSt/PMMA) latex particles were prepared by seeded‐emulsion polymerisation with three stages. core cured PSi was octamethyl cyclotetrasiloxane (D4) tetraethoxysilane (TEOS) co‐condensation. Using vinyltriethoxysilane (VTEOS) as coupling agent, functional vinyl...

Melamine-formaldehyde (MF)rigid foams with high closed cell content were prepared via oven heating process, using MF prepolymer from melamine and paraformaldehyde as a matrix, cyclohexane the foaming agent, dimethyl silicon oil foam stabilizers, hydrochloric acid catalyst. The effect of viscosity, temperature, amount catalyst on morphology, content, apparent density, water absorption compressive strength rigid systematically studied. optimized conditions are follows: viscosity ranges 35 Pa·s...

ABSTRACT Novel core–shell LaF 3 : Eu 3+ nanocrystals/PNIPAM nanogels were prepared by surface‐initiated living radical polymerization. The microstructure and performance of the nanocrystals hybrid characterized transmission electron microscopy (TEM), X‐ray diffraction (XRD), photoelectron spectrometer (XPS), photoluminescence (PL). thermosensitive fluorescence behaviors drug release investigated PL at various temperatures. results suggested that was influenced greatly ambient temperature,...

In the present study, a novel thermo-responsive microgel with aggregation induced emission (AIE) based on hyperbranched polysiloxane (HBPS) as AIE-active luminogen, its thermo-responsiveness and application in controlled release of drug is firstly reported. Firstly, HBPS was prepared by transesterification, then it copolymerized N-isopropylacrylamide (NIPAm) to prepare polysiloxane/poly(N-isopropylacrylamide) (HBPS@PNIPAm) free radical copolymerization. The microstructure as-prepared...

In this study, distilers' grains were used to prepare biochar, which is renewable and ecofriendly, then cuprous oxides nanoparticles loaded the biochar improve properties of Cu2O. Their structure morphology characterized by X-ray diffraction (XRD), field-emission scanning electron microscope (FE-SEM), brunauer-emmett-teller (BET) specific surface area. The results showed that Cu2O onto successfully biochar-based (Cu2O/biochar composites) have larger area than pure nanoparticles....

In this study, a kind of novel rare-earth nanocrystals/hydroxypropylcellulose–poly (acrylic acid) (HPC–PAA) complex fluorescent nanogel, its responsive behavior to environmental temperature and pH value were reported. For preparation, with HPC being used as template, HPC–PAA nanogel was first synthesized by polymerization crosslinking reaction acrylic acid (AA) in water solution. the process, redox initiator, which composed ammonium persulfate (APS) N,N,N′,N′-tetramethylethylenediamine...

一锅法制备 YF 3 :Yb 3＋ -Er 纳米晶复合 PNIPAm-co-PAA 纳凝胶及其 荧光温敏行为 宋秋生* 杨森森 盛锐 李谭 (合肥工业大学化工学院 合肥 230009) 摘要 采用巯基乙胺为配体, 以硝酸铒(Er(NO ) ), 硝酸镱(Yb(NO 硝酸钇(Y(NO )和氟化铵(NH 4 F)为原料, 水热 法制备表面含 NH 2 基团的活性 纳米晶; 以过硫酸钾(K S O 8 )为引发剂, 借助 1-乙基-(3-二甲基氨基丙基) 碳酰二亚胺(EDC)与 N-羟基丁二酰亚胺(NHS)的偶联反应, 在活性纳米晶存在下, 进行 N-异丙基丙烯酰胺(NIPAm), N,N'-亚甲基双丙烯酰胺(BIS)与丙烯酸的自由基共聚合, 一锅法制备了 /PNIPAm-co-PAA 荧光温敏纳凝 胶. 对制备的纳米晶及纳凝胶的结构与荧光性能进行了表征.结果表明, 纳米晶的粒径为 6～10 nm

In the present study, a novel nanogel of HPC-PMAA/PpIX with thermo- and pH sensitive performance its application in cancer photodynamic therapy is reported. nanogels were prepared by free radical polymerization method HPC as template, hydroxypropyl cellulose (HPC), methyl acrylic acid (MAA), protoporphyrin IX (PpIX) N,N'-methylene bisacrylamide (BIS) raw materials. The as-prepared characterized Fourier transform infrared (FTIR), photoluminescence (PL) UV-visible spectrophotometer (UV-vis),...

Purpose – The purpose of this paper is to modify the photostability organic fluorescent dyes and develop evaluate a route their derived polymeric dyes. Design/methodology/approach A series novel were prepared using 3-(2-benzimidazolyl)-7-(diethylamino)-coumarin (disperse yellow 8GFF, abbreviated as 8GFF) polyethylene glycol (PEG) raw materials. First, an intermediate carboxyl functioned 8GFF was by condensation reaction pyromellitic dianhydride; then synthesized reacting PEG with condensate...

In this work, EuF 3 and NaYF 4 nanocrystals were prepared by liquid-solution-solid (LSS) method respectively, high-resolution transmission electron microscopy (HRTEM) images revealed that the as-prepared monodisperse nanoparticles with size about 30 nm; while polydisperse of 5～20 nm.And they used to prepare a series novel ternary complex hydrogels -NaYF nanocrystals/poly(N-isopropyl acrylamide) (PNIPAm) free radical polymerization.In typical synthesis, 2 mg nanocrystals, 201.6 reactants...

Abstract On the basis of water solubility poly( N ‐vinyl‐2‐pyrrolidinone), hollow porous poly(lactic acid) microspheres (HPPLAs) were prepared by a water‐in‐oil‐in‐water multiple‐emulsion solvent evaporation method. The influence concentration stabilizer Span80 in oil phase on morphology was investigated. It found that when content solutions 3.5 wt %, most HPPLAs about 2 μm diameter. Field scanning electron microscopy results show and hollow. structure crystal form characterized Fourier...

Purpose The purpose of this study is to investigate the effect chlorination on structure and properties reclaimed rubber discuss feasibility a novel method chlorinate rubber. Design/methodology/approach A series chlorinated with different degrees (CD) was prepared by suspension in aqueous phase (SCAP). Their performance were characterized Fourier transform infrared spectrometer, energy dispersive spectroscopy, scanning electron microscopy, thermogravimetric mechanical property test. Findings...

Honeycomb patterned hybrid films were prepared from sulfonated polystyrene (SPS) and tetrabutyl titanate (TBT) by a combination of the “breath figure” technique with gelation process. The influences solvents, concentration mass ratio SPS/TBT in sols on morphology honeycomb investigated. results SEM, FTIR, DSC, TG XRD showed that well-ordered formed when benzene was used as solvent, ratios range 10/1∼1/2 SPS maintained 20-80 mg/mL.