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Surface chemical functionalization of starch nanocrystals modified by 3-aminopropyl triethoxysilane.

Abstract：

:A comparative experiment about the 3‑aminopropyl triethoxysilane (APTES) modification of waxy potato starch nanocrystals (WPSNCs) and waxy maize starch nanocrystals (WMSNCs) was employed in the present study. The purpose of surface chemical functionalization was to introduce functional groups and improve hydrophobicity of SNCs for the extensive application. The degree of substitution (DS) of both SNCs displayed the upward trend with the increase of applied APTES, while WPSNCs showed higher DS than that of WMSNCs in the same dosage of APTES. XRD revealed the un-changed crystalline structure and decreased relative crystallinity after the modifications. The structure of silylated SNCs surface was characterized by FT-IR and XPS, which confirmed the presence of functional amino groups. The introduction of amino groups resulted in a simultaneous enhancement of zeta potentials for both SNCs relatively. The modified SNCs could be uniformly dispersed both in water and ethanol phase revealing improved hydrophobicity through wettability experiments.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Hao Y,Chen Y,Xia H,Gao Q

doi

10.1016/j.ijbiomac.2018.12.200

subject

Has Abstract

pub_date

2019-04-01 00:00:00

pages

987-993

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(18)35619-8

journal_volume

126

pub_type

杂志文章

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