Xiuzhi Tian

Modification of cellulose for high glucose generation

The influence of introduction of cyanuric chloride on glucoses yield (Y) in acid-catalyzed hydrolysis of microcrystalline cellulose (MCC) has been studied. The content of cyanuric chloride (C) in modified MCCs was determined by X-ray photoelectric spectroscopy. The chemical structures of modified MCCs were analyzed by Fourier transformation-infrared spectroscopy and cross polarization/magic angle spinning (13)C nuclear magnetic resonance. Crystal index (CI) and the ratio (R) representing the sum of content of (1 ̅10) and (110) to that of (200) were calculated based on diffraction intensity in wide angle X-ray diffraction (WAXD). Hydrolysis experiment and WAXD show that Y, CI and R vary with C. The modified MCC containing 3.9 mol% of cyanuric chloride has the highest Y, the highest R and the lowest CI. Variations of CI and R show that the chemical modification changed the proportion of crystal/amorphous and crystal planes, both of which influence glucoses generation in hydrolysis of cellulose.

Synthesis and properties of the vinyl silicone oil modified polyacrylate core-shell latex as a binder for pigment printing

Vinyl silicone oil (VSO) modified polyacrylate latex is synthesized by emulsion polymerization. The core-shell structure of the latex particle is observed on transmission electron microscopy. The chemical structure of the copolymer was characterized by infrared spectrum. The glass transition temperatures of core-layer and shell-layer of latex particle are determined by differential scanning calorimetry. The size of particle of the core-shell latex is measured on a nanoscale granularity analyzer. The good softening effect of VSO is proved by the application of the latex as a binder of pigment printing on textiles. The good fastness of the printed fabrics is obtained, which shows that the synthesized core-shell latex can be used as a binder in pigment printing of textiles.

Synthesis of the Hydroxyl-Containing Poly(dimethyl siloxane) Modified Polyacrylate Core-Shell Latex and the Application as a Novel Binder for Pigment Printing of Fabric

A core-shell latex based on methyl methacrylate, n-butyl acrylate, and methacrylic acid was synthesized, and the core of which was modified by hydroxyl-containing poly(dimethyl siloxane). Glycidyl methacrylate was empolyed as one of monomers in the shell and served as a cross-linker when the core-shell latex was used as an binder of the pigment printing. The chemical structure of the copolymer was characterized by infrared spectrum. The stucture and the particle size of the core-shell particles were characterized by transmission electron microscopy, nanoscale granularity analysis, and differential scanning calorimetry. The latex was used as a binder in pigment printing of fabrics.

Synthesis and Dispersion Property of Poly(Butyl Acrylate-B-Acryl Amide) by Alkaline Reversed Atom Transfer Radical Polymerization in Emulsion: A Novel Amphiphilic Binder

The hydrophilic property of acrylate copolymer is very important for the dispersion and adhesion ability in many fields such as pigment printing and dyeing of textiles. Poly(butyl acrylate-b-acryl amide) was synthesized by successive reversal atom transfer radical polymerization of butyl acrylate and acryl amide in emulsion. The structure of the copolymer was characterized by infrared spectrum and nuclear magnetic resonance. By adding alkaline salt, the molecular weight and its distribution of the block copolymer were controlled. The dispersion ability of acrylic copolymer was improved by acryl amide segment; thus, preparation of a novel amphiphilic binder is expected to be helpful to solve the problems of the current binders.