Effect of sodium hydroxide concentration on properties of carboxymethyl rice starch
Effect of sodium hydroxide (NaOH) concentrations on properties of carboxymethyl rice starch (CMS r) was investigated. Fourier transform-infrared (FTIR) spectrum confirmed that carboxymethylation took place on the starch molecules. The DS value of CMS r increased with increasing NaOH concentrations (...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84864820061&partnerID=40&md5=30ea9ba77f6e3f508c4ac5da9c78e95b http://cmuir.cmu.ac.th/handle/6653943832/6735 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | Effect of sodium hydroxide (NaOH) concentrations on properties of carboxymethyl rice starch (CMS r) was investigated. Fourier transform-infrared (FTIR) spectrum confirmed that carboxymethylation took place on the starch molecules. The DS value of CMS r increased with increasing NaOH concentrations (10-40% w/v). However, when the level of NaOH concentration reached 50%, the DS of the CMS decreased. The viscosity of CMS r decreased with increasing NaOH concentrations. The morphology of native rice starch and CMS r was further investigated through scanning electron microscope (SEM). The mirco-structure revealed that the morphology of CMS r granules were more damage with increasing NaOH concentration which related with DS. |
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