title: Preparation of hydroxypropyl agars and their properties.
abstract: A series of hydroxypropyl agars (HPAs) with different hydroxypropyl molar substitution (MS) were prepared and their physicochemical properties were characterized. After hydroxypropylation, the dissolving temperature, the gelling temperature, the gel melting temperature, the gel strength, and the thermal stability of agar all decreased except that its hygroscopicity increased. The gel skeleton structures of raw agar and HPAs were all of the porous network structures, but the pores of gel skeleton structure of HPAs became smaller and denser.
authors.affiliation: College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China. Electronic address: zhangxdqd@hotmail.com.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Zhang
authors.affiliation: College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.affiliation: College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Mingzhao
authors.initials: M
authors.lastname: Cao
authors.affiliation: College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Xia
authors.affiliation: College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Yuqiao
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000362:Agar / Q000138:chemical synthesis* / Q000737:chemistry*; D020285:Cryoelectron Microscopy; D008855:Microscopy, Electron, Scanning; D012212:Rheology; D012399:Rotation; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013818:Thermogravimetry
chemical_list: D000362:Agar
keywords: Agar; Gelling temperature; Hydroxypropylation; Optical rotation; Thermal stability