The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 2010
Filed:
Jul. 14, 2005
Harm Van Der Werff, Bunde, NL;
Shilun Ruan, Hkust, HK;
Tongxi Yu, Ma On Shan, HK;
Ping Gao, Saikung, HK;
Roelef Marissen, Born, NL;
Harm van der Werff, Bunde, NL;
Shilun Ruan, Hkust, HK;
Tongxi Yu, Ma On Shan, HK;
Ping Gao, Saikung, HK;
Roelef Marissen, Born, NL;
DSM IP Assets B.V., Heerlen, NL;
Abstract
The invention relates to a process for making a carbon nanotubes/ultra-high molar mass polyethylene (CNTs/UHPE) composite fiber comprising the steps of a) pre-treating CNTs with an acidic aqueous solution; b) making a composition containing pre-treated CNTs dispersed in a solution of UHPE in a spin solvent; and c) spinning the composition obtained into fibers; wherein step b) comprises making a dispersion of pre-treated CNTs in an alcohol, and mixing this dispersion with a mixture of UHPE and spin solvent. With this process CNTs/UHPE composite fibers showing improved tensile properties are obtained at relatively low CNTs content. A further advantage is that no or hardly any additional components, like dispersion aids, need to be added to make a stable dispersion of CNTs in the spin composition. The invention also relates to a CNTs/UHPE composite fiber obtainable by the process according to the invention, and to semi-finished or end-use articles containing said composite fiber.