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| Preparation and Properties of HMC, HEC, and HPC/Gelatin Composite Membrane |
| Received:August 08, 2019 |
| DOI：10.11981/j.issn.1000-6842.2020.04.28 |
| Key Words:gelatin;cellulose;blend membrane;mechanical properties;thermal stability |
| Fund Project:青海省自然科学基金（2019-ZJ-928；2015-ZJ-909）。 |
| Author Name | Affiliation | Postcode | | YANG Siqiao* | School of Chemistry and Chemical Engineering， Qinghai University for Nationalities， Xining， Qinghai Province， 810007 | 810007 | | LI Haichao | School of Chemistry and Chemical Engineering， Qinghai University for Nationalities， Xining， Qinghai Province， 810007 | 810007 |
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| Abstract: |
| The gelatin composite membrane was prepared by blending method using gelatin as basis material， glycerinum as plasticizer and reinforcing with hydroxymethyl cellulose （HMC） or hydroxyethyl cellulose （HEC） or hydropropyl cellulose （HPC）. Scanning electron microscope （SEM）， intelligent electronic tensile testing machine， thermal differential scanning instrument and temperature retraction apparatus were used to characterize the prepared composite membranes. The results indicated that the elongation at break and tensile strength of composite membranes tended to increase at first and then decrease with the increasing of cellulose content. The composite membranes had the optimum tensile strength when the cellusose contents were 1% （HMC， 38.4 MPa）， 1% （HEC， 35.3 MPa） and 0.5% （HPC， 32.1 MPa）， respectively. The thermal stability of the composite membranes was improved and the heat shrinkable rate decreased. The addition of cellulose enhanced the mechanical properties and thermal stability of composite membranes， however different cellulose had certain difference in reinforcing efficiency. |
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