North University of China

Shanxi Zhongbei New Material Technology Co., Ltd.

Shanxi Zhohngbei New Material Technology Co., Ltd.

Northen University of China

Mingshan Gong

Yaqing Liu

Guizhe Zhao

Yang Xiang

This disclosure relates to slow- and controlled-release fertilizers, and more particularly to a device and a method for industrialized continuous and simplified preparing a urea-formaldehyde slow-release nitrogen fertilizer or a urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer. Hydroxymethylurea is produced through the reaction extrusion of urea and formaldehyde. Through the self-ploycondensation of the hydroxymethylurea or the co-polymerization of the hydroxymethylurea and a modifier in a reactive extruder, the urea-formaldehyde slow-release nitrogen fertilizer or the urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer is prepared.

Device and method for industrialized continuous and simplified preparation of urea-formaldehyde slow-release nitrogen fertilizer or urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer

This application relates to natural rubber (NR) composites, and more specifically to a method of preparing a graphene/natural rubber composite. In the method provided herein, nano-silica loaded graphene oxide (SiO-GO) is formed by electrostatic interaction between silica and graphene oxide (GO), and then the SiO-GO is added to natural rubber (NR) latex to obtain a SiO-GO/NR masterbatch by aqueous phase synergistic aggregation-precipitation process. The SiO-GO/NR masterbatch is subjected to mechanical blending and vulcanization to obtain the graphene/NR composite.

Method of preparing graphene/natural rubber composite with enhanced mechanical properties, thermal conductivity, and wear resistance

A method for continuously preparing graphene powder directly dispersed in an organic system, including: mixing an aqueous graphene oxide dispersion, an emulsifier and an oil-soluble monomer followed by pH adjustment and dispersing to obtain a pre-emulsified dispersion; subjecting the pre-emulsified dispersion to an emulsion polymerization reaction in the presence of an initiator; introducing a reducing agent to reduce graphene oxide; and subjecting the reaction mixture after emulsion polymerization to spray drying to obtain the graphene powder. Equipment used in the preparation method is also provided herein.

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Taiyuan, China

Mingshan Gong