公开(公告)号：US20230192548A1

公开(公告)日：2023-06-22

申请号：US18110484

申请日：2023-02-16

Applicant: Worcester Polytechnic Institute

Inventor： Shuai Wang ,  Nima Rahbar ,  Suzanne F. Scariata

IPC: C04B24/14 ,  C04B41/63 ,  C12N11/14 ,  C12N9/88 ,  E01C7/14 ,  E01C7/35

CPC classification number: C04B24/14 ,  C04B41/63 ,  C12N11/14 ,  C12N9/88 ,  C12Y402/01001 ,  E01C7/147 ,  E01C7/35 ,  C04B2111/72

Abstract: Methods for repair of cracks and niches in concrete using carbonic anhydrase embedded in a gelatin, hydrogel, or other aqueous matrix are provided. A durable corrosion resistant concrete mix containing carbonic anhydrase is provided, as are methods of making and using the durable corrosion resistant concrete. Corrosion resistance and durability derive from decreased porosity compared to concrete without the enzyme, conferring decreased access of deleterious materials such as chloride ions to interior portions of the concrete.

公开(公告)号：US20180244585A1

公开(公告)日：2018-08-30

申请号：US15903565

申请日：2018-02-23

Applicant: Worcester Polytechnic Institute

Inventor： Nima Rahbar ,  Suzanne Frances Scarlata ,  Jessica Anne Rosewitz

IPC: C04B41/50 ,  C04B41/45

CPC classification number: C04B41/5012 ,  C04B41/009 ,  C04B41/4535 ,  C04B41/501 ,  C04B41/65 ,  C04B2103/0001 ,  C04B2111/72 ,  C12N9/88 ,  C12P3/00 ,  C12Y402/01001 ,  C04B28/02 ,  C04B41/455 ,  C04B2103/001

Abstract: An aqueous solution of carbonic anhydrase and calcium chloride is contacted with a cementitious surface defining at least one opening or fissure in the presence of ambient carbon dioxide to thereby cause the calcium chloride and carbon dioxide to react, whereby calcium carbonate precipitate from the solution and seals the opening or fissure.

公开(公告)号：US10647617B2

公开(公告)日：2020-05-12

申请号：US15903565

申请日：2018-02-23

Applicant: Worcester Polytechnic Institute

Inventor： Nima Rahbar ,  Suzanne Frances Scarlata ,  Jessica Anne Rosewitz

IPC: C04B41/50 ,  C04B41/65 ,  C04B41/45 ,  C12P3/00 ,  C12N9/88 ,  C04B41/00 ,  C04B111/72 ,  C04B103/00

Abstract: An aqueous solution of carbonic anhydrase and calcium chloride is contacted with a cementitious surface defining at least one opening or fissure in the presence of ambient carbon dioxide to thereby cause the calcium chloride and carbon dioxide to react, whereby calcium carbonate precipitate from the solution and seals the opening or fissure.

公开(公告)号：US20240351954A1

公开(公告)日：2024-10-24

申请号：US18639498

申请日：2024-04-18

Applicant: Worcester Polytechnic Institute

Inventor： Nima Rahbar ,  Shuai Wang ,  Suzanne Scarlata

IPC: C04B35/52 ,  B28B11/24 ,  C04B35/626 ,  C04B35/64 ,  C12P3/00

CPC classification number: C04B35/52 ,  C04B35/6264 ,  C04B35/62655 ,  C04B35/64 ,  C12P3/00 ,  B28B11/24 ,  C04B2235/422 ,  C04B2235/442 ,  C04B2235/48 ,  C04B2235/5436 ,  C04B2235/6027 ,  C04B2235/606 ,  C04B2235/656

Abstract: A carbon-negative Engineering Structural Material (ESM) has a compressive strength approaching that of concrete and relies on a carbon-absorbing enzyme for crystalline formations formed cooperatively with a porous structure to achieve load-bearing properties. A tough scaffold forms through capillary suspension, a technique that utilizes capillary forces to concentrate particles in a liquid matrix. Carbonic anhydrase, a zinc-containing enzyme extracted from bovine erythrocytes, is harnessed to grow mineral materials, and the capillary suspension is used to create a construction material, including sand and a polymer. This combination enables the incorporation of precipitated calcium minerals into the structure, resulting in the development of water-resistant and load-bearing construction materials.

公开(公告)号：US20250122444A1

公开(公告)日：2025-04-17

申请号：US18634107

申请日：2024-04-12

Applicant: Worcester Polytechnic Institute

Inventor： Tabiri K. Asumadu ,  Mobin Vandadi ,  Kwadwo Mensah-Darkwa ,  Emmanuel Gikunoo ,  Samuel Kwofie ,  Desmond E.P. Klenam ,  Nima Rahbar ,  Winston O. Soboyejo

IPC: C10M177/00 ,  C10M103/02 ,  C10N50/08 ,  C10N70/00 ,  C23C8/64

Abstract: A carbon coating such as graphene formed on an article or component forms a reduced friction surface on the component. The graphene forms a superlubricity coating for mitigating friction against engaged, moving surfaces. A metallic component receives a graphene coating resulting from a high temperature biowaste treatment (HTBT) by surrounding the metallic component with a granular biowaste medium defining a carbon source, and heating the metallic component in the biowaste medium for diffusing carbon from the biowaste medium to aggregate on a surface of the component, thereby forming a graphene coating.

公开(公告)号：US20230117517A1

公开(公告)日：2023-04-20

申请号：US17943548

申请日：2022-09-13

Applicant: Worcester Polytechnic Institute

Inventor： Nima Rahbar ,  Suzanne F. Scarlata ,  Shuai Wang

IPC: C04B26/02 ,  C04B14/06 ,  C04B24/14 ,  C04B14/30

Abstract: Materials and methods for a rapid and effective way to create a carbon negative self-healing construction material are described. The construction material uses sand aggregates, a trace amount of catalyst, a small dosage of scaffolding material with a crosslinking agent, and a calcium source. The curing is performed at a high temperature for a short period or at room temperature for a long period. The catalyst-driven method to bridge the sand particles results in a dense, stiff, strong, and tough structural material, which upon exposure to calcium source and CO2 heals itself repeatably.