United States of America As Represented by the Secretary of the Air Force

Nanotek Instruments, Inc.

USA As Represented by Secretary of the Navy

Zhenning Yu

Loon-Seng Tan

Bor Z Jang

Aruna Zhamu

David Huabin Wang

Hilmar Koerner

Guorong Chen

Chen-guang Liu

David Neff

Yanbo Wang

Richard A Vaia

Jinjun Shi

Kyoungweon Park

ChenGuang Liu

Bingqian Zheng

A family of low-molecular-weight, main-chain thermotropic liquid-crystalline polyimides (TLC-PI) that are crosslinkable is disclosed. These all-aromatic TLC-PI are derived from (i) wholly aromatic and flexible diamine monomers, in which the linkage between the two aniline-ends contains a relatively high heat-tolerant but flexible chain constituted by two or more units of 1,4-phenoxy or 1,3-phenoxy or in combinations of both. Processes of making and using such all-aromatic TLC-PI is also provided.

All-aromatic liquid-crystalline homo-polyimides with aromatic endgroups and crosslinked products therefrom

The invention relates to cross-linkable thermoplastics, processes of making such cross-linkable thermoplastics and products comprising such cross-linkable thermoplastics. Such cross-linkable thermoplastics provide articles made by the additive manufacturing (AM) process with increased strength, the desired in use temperature stability and the desired thermo-oxidative stability.

Cross-linkable thermoplastics, and processes of making and using same

Applicants disclose a family of rod-like dianhydrides that contain two phthalic anhydride moieties linked by a bridge that is comprised of at least one ethynyl and one paraphenylene group and processes of making and using such rod-like dianhydrides. Such rod-like dianhydrides can endow net-work structures with improved mechanical and thermal properties in the crosslinked-polymer products.

Crosslinkable mesogenic dianhydride monomers

The invention relates to cross-linkable oligoimides, processes of making such cross-linkable oligoimides and products comprising such cross-linkable oligoimides. Such cross-linkable oligoimides provide articles made by an AM process with the desired process ability that permits filament formation, post cure increased strength, the desired in use temperature stability and the desired thermo-oxidative stability.

Cross-linkable oligoimides, and processes of making and using same

The invention relates to bis(aniline) compounds containing multiple arylethynyl, alkylethynyl, ethynyl groups or their combinations, processes of making such compounds and materials comprising such compounds. Such, bis(aniline) compounds preferably comprise multiple phenylethynyl (PE) groups, i.e. 2-4 PE moieties. Such compounds are useful monomers for the preparation of polyimides, polyamides and poly(amide-imides) whose post-fabrication crosslinking chemistry (i.e. reaction temperature) can be controlled by the number of PE per repeat unit as well as finding utility in thermosetting matrix resins, 3D printable resins, and as high-carbon-content precursors to carbon-carbon composites.

Bis(aniline) compounds containing multiple substituents with carbon-carbon triple-bonded groups

A family of low-molecular-weight, main-chain thermotropic liquid-crystalline co-polyimides (TLC-CoPI) that are crosslinkable, and based on a unique, liquid-crystallinity (LC)-enabling diamine, namely, 1,3-bis[4-(4′-aminophenoxy)cumyl]benzene (BACB) and two or more mesogenic dianhydrides, at least one of which is a diphthalic dianhydride (DPA) that contains one or more thermally reactive and crosslinkable moieties similar to that of phenylethynyl (PE) is disclosed. Processes of making and using such low-molecular-weight, main-chain thermotropic liquid-crystalline co-polyimides are also provided.

Highly aromatic and liquid-crystalline co- polyimides endcapped with aromatic groups and crosslinked products therefrom

The invention generally relates to shape memory films that are tri-functionally crosslinked and that comprise multiple, non-terminal, phenylethynyl moieties. In addition, the present invention relates methods of fabricating such films. Due to the improved properties of such SMPs, the SMP designer can program in to the SMP thermomechanical property enhancements that make the SMP suitable, among other things, for advanced sensors, high temperature actuators, responder matrix materials and heat responsive packaging.

Multiphenylethynyl-containing and lightly crosslinked polyimides capable of memorizing shapes and augmenting thermomechanical stability

The invention relates to nanohybrids that are gold nanorod J-aggregates having a broadened surface plasmonic resonance band, processes of making such gold nanorod J-aggregates and products comprising such gold nanorod J-aggregates. Such gold nanorod J-aggregates exhibit broad localized surface plasmonic reasonable range from 800 nm to 2000 nm.

Polyimide-gold-nanorod J-aggregates with broadened surface plasmonic resonance band and method of manufacture

Method for fabricating multiphenylethynyl-containing and lightly crosslinked polyimides capable of memorizing shapes and augmenting thermomechanical stability

A two-photon absorbing (TPA) compound is provided along with a method of making same. The TPA compound has a general structural formula: where Rand Rare independently selected from the group consisting of linear or branched alkyl chains having a general formula CH, n ranges from about 6 to about 20, and ethoxylated alkyls having a general formula R(OCHCH)OCHCH&#x2014;, where Ris a C1 to C4 alkyl group, and where m ranges from 0 to about 3; and where Y is selected from the group consisting of H, OH, and alkoxyl groups.

Piperazine-containing two-photon absorbing compounds

A flexible, asymmetric electrochemical cell comprising: (A) A sheet of graphene paper as first electrode comprising nano graphene platelets having a platelet thickness less than 1 nm, wherein the first electrode has electrolyte-accessible pores; (B) A thin-film or paper-like first separator and electrolyte; and (C) A thin-film or paper-like second electrode which is different in composition than the first electrode; wherein the separator is sandwiched between the first and second electrode to form a flexible laminate configuration. The asymmetric supercapacitor cells with different NGP-based electrodes exhibit an exceptionally high capacitance, specific energy, and stable and long cycle life.

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Beavercreek, OH, United States of America

Zhenning Yu