Data · dataset · 2026
Influence of Diamine Structure on Chain Packing and H<sub>2</sub>/CH<sub>4</sub> Transport in BTDA-Based Polyimide Membranes
Listed in ZivaHub and Deakin Research Online and DMU Figshare — shown once because both records carry DOI 10.1021/acsapm.6c02636.s001
Developing high-performance membranes for H<sub>2</sub>/CH<sub>4</sub> separation is a critical imperative for the advancement of the hydrogen economy.
Description
However, conventional polymeric membranes often suffer from the intrinsic trade-off between permeability and selectivity, as well as the technical dilemma between chain rigidity and processability. In this study, we systematically investigated polyimides based on 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA) containing three structurally distinct diamines to elucidate the effects of intermolecular hydrogen bonding, steric bulk, backbone rigidity, and flexibility on H<sub>2</sub>/CH<sub>4</sub> transport.
By systematically incorporating a hydrogen-bonding diamine (DABA) alongside bulky (DAPI) and flexible (MDA) units, we established a precise structure–property relationship governing subnanometric gas transport. Experimental characterizations confirmed that DABA-driven hydrogen-bonding networks create an interaction-rich matrix with significantly contracted interchain distances (<i>d</i>-spacing 4.58 Å) and exceptional thermal stability (exceeding 520 °C).
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Gas permeation measurements showed that B-DABA exhibited the highest H<sub>2</sub>/CH<sub>4</sub> ideal selectivity of 72.81 among the membranes investigated in this study, primarily owing to its strongly suppressed CH<sub>4</sub> permeability. Atomistic molecular dynamics simulations indicated that free-volume characteristics and polymer-chain mobility can jointly influence gas-transport behavior. While bulky DAPI units increase free volume, their rigid indane structures restrict polymer-chain mobility, whereas the flexible MDA-containing matrix exhibits greater segmental mobility.
These results highlight the combined importance of intermolecular interactions, free-volume characteristics, and molecular mobility in determining H<sub>2</sub>/CH<sub>4</sub> transport in BTDA-based polyimides.
Links
Where it is published
- DOI doi.org/10.1021/acsapm.6c02636.s001 ↗
DOI / persistent id · from zivahub uct ac za
Catalogue records · 1
- OAI-PMH record api.figshare.com/v2/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Af… ↗
metadata API · from zivahub uct ac za
Topics
- From keywords
- Biochemistry and cell biology · Biochemistry and cell biology · Biochemistry and cell biology · Chemistry · Chemistry · Chemistry · Earth & Environmental Science · Earth & Environmental Science · Earth & Environmental Science · Economics & Finance · Economics & Finance · Economics & Finance · Engineering · Engineering · Engineering · Life Sciences · Life Sciences · Life Sciences · Medicine & Health · Medicine & Health · Medicine & Health · Proteomics and intermolecular interactions · Proteomics and intermolecular interactions · Proteomics and intermolecular interactions
Provenance · 3 source records, 29 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| ZivaHub | oai:figshare.com:article/34037264 | 13 d ago | JSON v1 |
| Deakin Research Online | oai:figshare.com:article/34037264 | 13 d ago | JSON v1 |
| DMU Figshare | oai:figshare.com:article/34037264 | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[field].anzsrc:field:310109 | mapping · dro deakin edu au | vocabulary-mapper@1.0.0 | keywords['intermolecular interactions'] |
| concepts[field].anzsrc:field:310109 | mapping · zivahub uct ac za | vocabulary-mapper@1.0.0 | keywords['intermolecular interactions'] |
| concepts[field].anzsrc:field:310109 | mapping · figshare dmu ac uk | vocabulary-mapper@1.0.0 | keywords['intermolecular interactions'] |
| concepts[field].anzsrc:group:3101 | mapping · figshare dmu ac uk | vocabulary-mapper@1.0.0 | keywords['Cell Biology'] |
| concepts[field].anzsrc:group:3101 | mapping · zivahub uct ac za | vocabulary-mapper@1.0.0 | keywords['Cell Biology'] |
| concepts[field].anzsrc:group:3101 | mapping · dro deakin edu au | vocabulary-mapper@1.0.0 | keywords['Cell Biology'] |
| concepts[field].local:field:chemistry | mapping · figshare dmu ac uk | connector:figshare_dmu_ac_uk@1.0.0 | |
| concepts[field].local:field:chemistry | mapping · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[field].local:field:chemistry | mapping · dro deakin edu au | connector:dro_deakin_edu_au@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · figshare dmu ac uk | connector:figshare_dmu_ac_uk@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · dro deakin edu au | connector:dro_deakin_edu_au@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[field].local:field:economics-finance | mapping · dro deakin edu au | connector:dro_deakin_edu_au@1.0.0 | |
| concepts[field].local:field:economics-finance | mapping · figshare dmu ac uk | connector:figshare_dmu_ac_uk@1.0.0 | |
| concepts[field].local:field:economics-finance | mapping · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[field].local:field:engineering | mapping · figshare dmu ac uk | connector:figshare_dmu_ac_uk@1.0.0 | |
| concepts[field].local:field:engineering | mapping · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[field].local:field:engineering | mapping · dro deakin edu au | connector:dro_deakin_edu_au@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · dro deakin edu au | connector:dro_deakin_edu_au@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · figshare dmu ac uk | connector:figshare_dmu_ac_uk@1.0.0 | |
| concepts[field].local:field:medicine-health | mapping · dro deakin edu au | connector:dro_deakin_edu_au@1.0.0 | |
| concepts[field].local:field:medicine-health | mapping · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[field].local:field:medicine-health | mapping · figshare dmu ac uk | connector:figshare_dmu_ac_uk@1.0.0 | |
| description | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | /metadata/dc/description |
| license | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | /metadata/dc/rights |
| publication_date | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| title | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | /metadata/dc/title |