Preparing method of PTFE (polytetrafluoroethylene) composite material filled with nano particles

The invention discloses a preparing method of a PTFE (polytetrafluoroethylene) composite material filled with nano particles. The method comprises the following steps of: (1) carrying out surface modification on nano particles by virtue of a coupling agent to obtain modified nano particles; (2) carr...

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Bibliographische Detailangaben
Hauptverfasser:	YANG HUI, FAN XIANPING, WANG HAIFENG, XU YI, WANG SHUHUA, WU ZHOUAN, LUO ZHONGKUAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The invention discloses a preparing method of a PTFE (polytetrafluoroethylene) composite material filled with nano particles. The method comprises the following steps of: (1) carrying out surface modification on nano particles by virtue of a coupling agent to obtain modified nano particles; (2) carrying out coarse mixing on PTFE and the modified nano particles to obtain premixing powder, wherein the weight content of the modified nano particles in the premixing powder is 0.1%-50%; (3) adding organic solvent in the premixing powder, carrying out ultrasonic agitation, filtering and drying to obtain PTFE composite powder with uniformly dispersed nano particles, wherein the weight ratio of the organic solvent to the premixing powder is 50-1000%; and (4) carrying out mould-pressing and sintering on the PTFE composite powder to obtain the PTFE composite material filled with nano particles. The PTFE composite material filled with nano particles, prepared by the method, has the characteristics of high mechanical prop