Fabrication of telechelic DNA-bridged food emulsion gel as edible ink for 3D printing  

作　　者：Ruyuan Zhang Hao Huang Rong Ai Dong Li Yanqun Xu Weiwei Jin Zisheng Luo 

机构地区：[1]College of Biological Chemical Sciences and Engineering,Jiaxing University,Jiaxing,China [2]College of Biosystems Engineering and Food Science,Zhejiang University,Hangzhou,China [3]College of Ecology,Lishui University,Lishui,China [4]Ningbo Innovation Center,Zhejiang University,Ningbo,China [5]Wenzhou Academy of Agriculture Science,Liuhongqiao Road 1000,Wenzhou,China [6]Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs,Zhejiang Key Laboratory for Agri-Food Processing,Hangzhou,China

出　　处：《Food Quality and Safety》2024年第1期158-165,共8页食品品质与安全研究（英文版）

基　　金：the Key Research and Development Program of Zhejiang Province(No.2023C02042);the Wenzhou Agricultural Development Research Program(No.ZN2020001);the Cultivation Plan Project for the National Science Fund for Distinguished Young Scholars(No.00323133AL),China.

摘　　要：Objectives:Interdroplet interactions affect the properties and textures of emulsions.In this study,we creatively introduced telechelic DNA to link oil droplets directly at molecular scale to further improve the viscoelastic properties of emulsions.Materials and Methods:A stable emulsion with 70%oil fraction was prepared by adding 40 mg/mL of whey protein isolate and peach gum polysaccharide complex(WPI–PGP complex).The addition of telechelic DNA(0.125–0.375μmol/L)made the emulsion change from a cream-like state to a self-supporting gel.Results:Rheological experiments confirmed that the telechelic DNA could improve the yield stress,storage modulus/loss modulus(Gʹ/Gʹʹ)and apparent viscosity of the emulsion gel in a concentration-dependent manner(0–0.375μmol/L).Inverted fluorescence images clearly showed the interdroplet network of the emulsion gel linked by telechelic DNA.For 3D printing,the emulsion gel with a higher concentration(0.375μmol/L)of telechelic DNA displayed better surface quality and dimensional resolution,indicating improved printability.Conclusion:This study successfully designed a novel telechelic DNA-bridged emulsion gel,which showed great potential as edible ink for 3D printing.

关 键 词：Telechelic DNA WPI-PGP complex emulsion gel interdroplet interactions 3D printing. 

分 类 号：TS201.7[轻工技术与工程—食品科学]