The State University of New York

Other

National Science Foundation

The Research Foundation

The Research Foundation of Suny at Stony Brook

Stony Brook Technology and Applied Research

Benjamin Chu

Benjamin S Hsiao

Dufei Fang

Hongyang Ma

Zhe Wang

Miriam Rafailovich

Michael Hadjiargyrou

Shaoming Zhu

Xinhua Zong

Kwangsok Kim

Jonathan Sokolov

Collin Brathwaite

Harbans S Dhadwal

Devinder Mahajan

Tianbo Liu

Chunhung Wu

Tsung-Ming Yeh

Benjamin S Hsaio

Akio Okamoto

Jie Wei

Feng Zuo

Liguo Song

Dehai Liang

Rusty Lew Blanski

Rolf Hilfiker

Xuan Fu

Shawn H Phillips

Robert Grubbs

Priyanka R Sharma

Rui Yang

Nobuyuki Taniguchi

Kyunghwan Yoon

Yanmei Wang

Kwang-Sok Kim

Qicong Ying

Mayu Si

Ying Su

Michael Goldman

Ma Hongyang

Membranes suitable for use in membrane distillation are provided. Such membranes may include nano-fibrous layers with adjustable pore sizes. The membranes may include a hydrophobic nanofibrous scaffold and a thin hydrophilic protecting layer that can significantly reduce fouling and scaling problems.

Nanostructured fibrous membranes for membrane distillation

The present disclosure provides methods for producing carboxylated nanocelluloses. Compared with conventional methods, the methods of the present disclosure are simple and cost-effective in the production of carboxylated (or carboxy) nanocelluloses, in embodiments nanofibers and/or nanowhiskers, directly from raw biomass, including lignocellulose wood, non-wood sources, non-lignocellulose wood, lignocellulose or pure cellulose. The carboxy groups on the surface of nanocellulose thus produced can then be easily modified into functional derivatives such as amide, acetate, ether, ester, etc. The resulting nanocelluloses may be used to form purifying agents and/or filters to remove impurities from wastewater.

Production of carboxylated nanocelluloses

Membranes suitable for use in membrane distillation are provided. Such membranes may include nano-fibrous layers with adjustable pore sizes. The membranes may include a hydrophobic nano fibrous scaffold and a thin hydrophilic protecting layer that can significantly reduce fouling and scaling problems.

Water filtration membranes are provided. Such membranes include polysaccharide fibers that have been modified to possess thiol groups thereon, resulting in materials that effectively bind heavy metal ions. The resulting fibers may be used by themselves or applied to a scaffold to form a membrane suitable for removing heavy metals from water, including groundwater.

Nanofibrous materials for heavy metal adsorption

Elastic microfiltration membranes are provided. These membranes may be used in a membrane bioreactor. Due to the elastic nature of the membranes, removal of fouling materials is improved, thereby increasing the efficiency and longevity of the membranes. Methods for forming such membranes and uses of the membranes are also provided, including their use in membrane bioreactors.

Elastic membrane-based membrane bioreactor with high-efficiency for fouling control

Membranes are provided for filtering a gas, in some cases air. Membranes using a highly porous cellulose nano fibrous barrier layer with a highly porous (surface-charged) substrate can exhibit high flux, high retention, and low pressure drop in air filtration of toxic aromatic gases, fumes, bacteria, viruses, dusts, and particulate matters.

Highly porous fibrous network materials for gas filtration

Membranes of the present disclosure possess very thin barrier layers, with high selectivity, high throughput, low fouling, and are long lasting. The membranes include graphene and/or graphene oxide barrier layers on a nanofibrous supporting scaffold. Methods for forming these membranes, as well as uses thereof, are also provided. In embodiments, an article of the present disclosure includes a nanofibrous scaffold; at least a first layer of nanoporous graphene, nanoporous graphene oxide, or combinations thereof on at least a portion of a surface of the nanofibrous scaffold; an additive such as crosslinking agents and/or particles on an outer surface of the at least first layer of nanoporous graphene, nanoporous graphene oxide, or combinations thereof.

Porous graphene based composite membranes for nanofiltration, desalination, and pervaporation

A high flux and low pressure drop microfiltration (MF) membrane and a method for making the MF membrane. The microfiltration membranes are formed by a method that includes: preparing a nanofibrous structure; and modifying the surface of the nanofibrous structure with a surface modifier. The nanofibrous structure includes an electrospun nanofibrous scaffold or a polysaccharide nanofiber infused nanoscaffold or mixtures thereof. The electrospun nanofibrous scaffold can include polyacrylonitrile (PAN) or polyethersulfone (PES))/polyethylene terephthalate (PET) or mixtures thereof. The surface modifier includes polyethylenimine (PEI) and polyvinyl amine (Lupamin) cross-linked by ethylene glycol diglycidyl ether (EGdGE)/glycidyltrimethylammonium chloride (GTMACl) or poly(1-(1-vinylimidazolium)ethyl-3-vinylimdazolium dibromide (VEVIMIBr).

Functionalization of nanofibrous microfiltration membranes for water purification

Articles are provided for absorbing fluids. In embodiments, the articles of the present disclosure are modified to make them hydrophobic, thereby decreasing their affinity for water and similar liquids, while increasing their affinity for other hydrophobic materials, including oil. After use, the articles, in embodiments polyurethane sponges, may have their absorbed materials removed therefrom, and the articles may then be reused to absorb additional materials.

Modified hydrophobic sponges

Membranes are provided for energy efficient purification of alcohol by pervaporation. Such membranes include a nanofibrous scaffold in combination with a barrier layer. The membranes also include zeolites in the barrier layer. The membranes may, in embodiments, also include a substrate.

Polymeric nanofibrous composite membranes for energy efficient ethanol dehydration

Articles are provided for absorbing fluids. In embodiments, the articles of the present disclosure are modified to make them hydrophobic, thereby decreasing their affinity for water and similar liquids, while increasing their affinity for other hydrophobic materials, including oil. After use, the articles, in embodiments sponges, may have their absorbed materials removed therefrom, and the articles may then be re-used to absorb additional materials.

A membrane is provided including a coating layer having cellulose nanofibers produced from oxidized cellulose microfibers and an electrospun substrate upon which the coating layer is applied. The nanofibers of the electrospun substrate have a diameter greater than that of the cellulose nanofibers. The membrane also has non-woven support upon which the electrospun substrate is disposed. Microfibers of the non-woven support have a diameter greater than that of the nanofibers of the electrospun substrate. Application of electrospun membrane is in microfiltration area, while the cellulose nanofiber membrane serves in ultrafiltration, nanofiltration, and reverse osmosis after chemical modification.

High flux high efficiency nanofiber membranes and methods of production thereof

Membranes are provided for energy efficient purification of alcohol by pervaporation. Such membranes include a nanofibrous scaffold in combination with a barrier layer. The barrier layer includes a graphene oxide. The membranes may, in embodiments, also include a substrate.

Graphene oxide-based composite membranes

The present invention relates to (i) novel fluoroionic compounds capable of dispersing particulate filler compositions into a fluoropolymer; (ii) novel particulate compositions in which particulates are surface-functionalized with a fluoroionic compound; (iii) fluoropolymer composite materials containing the surface-functionalized particulates of (ii) incorporated into a fluoropolymer; (iv) crosslinked versions of (iii); v) methods for producing the crosslinked material of (iv); and (vi) articles of manufacture containing the compositions (iii) and (iv).

Ionic liquids, functionalized particulates, and fluoropolymer composites

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Setauket, NY, United States of America

Benjamin Chu