# US 10,483,012 B1 · Process for forming a nanocomposite film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,012 B1 - Document ID: US10483012B1 - Status: Granted - Kind: B1 - Application number: 16/455,825 - Filed: 2019-06-28 - Published: 2019-11-07 - Granted: 2019-11-19 - Earliest claimed: 2016-01-19 - Assignees: King Fahd University of Petroleum and Minerals - Applicants: King Fahd University of Petroleum and Minerals - Inventors: Mamdouh Ahmed Al-Harthi; Osamah Awadh Bin-Dahman - Web page: https://patentgrep.com/patent/US10483012B1 ## CPC - H01B 1/24: the conductive material comprising carbon-silicon compounds, carbon or silicon - B29C 39/003: {characterised by the choice of material} - B29C 41/12: Spreading-out the material on a substrate {, e.g. on the surface of a liquid} - B29D 7/01: Films or sheets - C08J 3/215: at least one additive being also premixed with a liquid phase - C08J 5/18: Manufacture of films or sheets - H01B 1/04: mainly consisting of carbon-silicon compounds, carbon or silicon - B29K 2029/04: {PVOH, i.e. polyvinyl alcohol (B29K2031/04 takes precedence)} - B29K 2105/0073: {Solution} - B29K 2105/162: {Nanoparticles} - B29K 2105/167: {Nanotubes} - B29K 2507/04: Carbon - B29K 2995/0005: Conductive - B29K 2995/006: Bio-degradable, e.g. bioabsorbable, bioresorbable or bioerodible - B29L 2007/008: {Wide strips, e.g. films, webs} - B32B 2307/21: Anti-static - C08J 2329/04: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids - C08J 2403/02: Starch; Degradation products thereof, e.g. dextrin - G02B 2207/121: Antistatic or EM shielding layer - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Nanocomposite films comprising carbon nanotubes dispersed throughout a polymer matrix and further comprising at least two surfaces with differing amounts of carbon nanotubes and differing electrical resistivity values are provided. Nanocomposite films comprising a polymer layer, a conductive nanofiller layer, and a polysaccharide layer having antistatic properties are provided. In particular, nanocomposites comprising polyvinyl alcohol as the polymer, graphene as the conductive nanofiller and starch as the polysaccharide are provided. In addition, processes for forming the nanocomposites, methods for characterizing the nanocomposites as well as applications in or on electrical and/or electronic devices are provided. ## Claims ### Claim 1 A process for forming a nanocomposite film, comprising: sonicating a solution of a conductive nanofiller to form a stable dispersion of nanofiller, mixing the stable dispersion of nanofiller with a solution comprising a polymer and a polysaccharide to form a reaction mixture, and casting the reaction mixture and drying to form the nanocomposite film, wherein during the casting the mixture separates into a polymer phase containing a majority of the polymer, a conductive nanofiller phase containing a majority of the conductive nanofiller, and a polysaccharide phase containing a majority of the polysaccharide, wherein the nanocomposite film comprises: a polymer layer comprising the polymer, a conductive nanofiller layer comprising the conductive nanofiller, a polysaccharide layer comprising the polysaccharide, wherein a surface of the polysaccharide layer has a first resistivity and a surface of the polymer layer has a second resistivity, wherein the conductive nanofiller layer is sandwiched between and in continuous contact with the polymer layer and the polysaccharide layer; and wherein the second resistivity is less than or equal to the first resistivity. ### Claim 2 (depends on 1) The process of claim 1, wherein a weight ratio between the polymer layer and the polysaccharide layer in the nanocomposite film is in the range of 80:20 to 60:40. ### Claim 3 (depends on 1) The process of claim 1, wherein the nanocomposite film comprises up to 25 weight percent of the conductive nanofiller layer relative to the total weight of the nanocomposite film. ### Claim 4 (depends on 1) The process of claim 1, wherein the conductive nanofiller is graphene in the form of nanosheets having an average longest dimension of 1-75 μm and an average thickness of 0.5-300 nm or graphene in the form of nanoplatelets having an average diameter of 1-75 μm and an average thickness of 0.5-300 nm. ### Claim 5 (depends on 1) The process of claim 1, wherein the polymer is a polyvinyl alcohol. ### Claim 6 (depends on 1) The process of claim 1, wherein the polysaccharide is a starch. ### Claim 7 (depends on 1) The process of claim 1, wherein the nanocomposite film has an average thickness of 0.1-1.0 mm. ### Claim 8 (depends on 1) The process of claim 1, wherein the surface of the polysaccharide layer is antistatic and has a first product of electrical resistance and area (R·A) in the range of 106-108 ohm·cm2 and the surface of the polymer layer is antistatic and has a second product of electrical resistance and area (R·A) in the range of 106-108 ohm·cm2.