Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (01): 141-146.doi: 10.13475/j.fzxb.20210909406

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and sizing properties of amphiphilic diblock grafted starch sizing agent

LI Wei(), ZHANG Zhengqiao, XU Zhenzhen, ZHANG Chaohui   

  1. College of Textiles and Garments, Anhui Polytechnic University, Wuhu, Anhui 241000, China
  • Received:2021-09-26 Revised:2021-10-12 Online:2022-01-15 Published:2022-01-28

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Abstract:

In order to provide a new grafted starch for enhancing usability of starch sizing agent in warp sizing, amphiphilic diblock grafted starch [BBES-g-(PAA-b-PBA)] was prepared by activators regenerated by electron transfer for atom transfer radical polymerization with acrylic acid (AA) and butyl acrylate (BA) as monomers and 2-bromoisobutyl esterified starch (BBES) as macromolecular initiator. Taking acid-hydrolyzed starch and BBES as contrast samples, effects of the amphiphilic diblock grafted branches on the properties of starch paste and tensile property of starch film were discussed. The results showed that the paste properties and film elongation are demonstrated in the order of BBES-g-(PAA-b-PBA)>BBES>acid-hydrolyzed starch, indicating that introduction of the grafted branches can further improve the viscosity stability of starch paste, adhesion to polyester fibers and breaking elongation of starch film. With the decrease in the grafting ratio of AA while the increase in the grafting ratio of BA, viscosity stability exhibited a slight difference, the adhesion and film elongation demonstrated a gradual increase, whereas tensile strength of the film decreased monotonically.

Key words: starch sizing agent, graft polymerization, grafting ratio, sizing property, amphiphilic diblock grafted starch

CLC Number: 

  • TS103.846

Fig.1

Reaction equation of two-step graft polymerization for synthesis of BBES-g-(PAA-b-PBA)"

Fig.2

FT-IR spectra of AHS, BBES and BBES-g-(PAA-b-PBA)"

Fig.3

SEM images of granular starch samples (×2 000)"

Tab.1

Grafting ratios of BBES-g-(PAA-b-PBA) samples"

结构单元 接枝率/%
III IV V
AA 8.53 7.73 4.98
BA 4.54 7.62 9.82

Fig.4

Impact of amphiphilic diblock graft polymerization on viscosity stability of starch paste"

Fig.5

Impact of amphiphilic diblock graft polymerization on adhesion of starch to polyester fibers"

Fig.6

Impact of amphiphilic diblock graft polymerization on surface tension of starch paste"

Fig.7

Impact of amphiphilic diblock graft polymerization on tensile properties of starch film"

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