Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (02): 37-43.doi: 10.13475/j.fzxb.20210800907

• Fiber Materials • Previous Articles     Next Articles

Preparation and environmental degradation behavior of biodegradable poly (butylene adipate-co-terephthalate) fiber

CHEN Yong1, WU Jing1,2,3(), WANG Chaosheng1, PAN Xiaohu4, LI Naixiang4, DAI Junming4, WANG Huaping1   

  1. 1. College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
    2. Engineering Research Center of Technical Textile, Ministry of Education, Donghua University, Shanghai 201620, China
    3. Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
    4. Sinopec Yizheng Chemical Fibre Co., Ltd., Yangzhou, Jiangsu 211900, China
  • Received:2021-08-02 Revised:2021-11-22 Online:2022-02-15 Published:2022-03-15
  • Contact: WU Jing E-mail:wuj@dhu.edu.cn

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Abstract:

In order to study the spinnability and fiber degradation of biodegradable poly(butylene adipate-co-terephthalate) (PBAT), biodegradable PBAT fiber was prepared using a two-step method involving melt spinning and drafting. The effects of spinning temperature and drafting ratio on the crystallinity, moisture regain and mechanical properties of PBAT fiber were studied, and the degradation properties of PBAT fiber in different environments were compared and analyzed. The results show that the optimum spinning temperature of PBAT was 260 ℃, and with the increase of drafting ratio, the breaking strength, crystallinity and orientation of PBAT fiber increased rapidly, while the elongation at break decreased. It was found that the abiotic cold and dry environments had the least influence on the properties of PBAT fibers, where the fiber strength decreased by only 3.6% after one month storage under such a circumstance. Under biological conditions, on the other hand, the influence of soil was more obvious compared to enzymatic hydrolysis and hydrolysis, where the crystallinity of PBAT fiber decreased from 34.45% to 19.36%.

Key words: poly(butylene adipate-co-terephthalate), environmental degradation performance, bio-based fiber, spinnability, mechanical property

CLC Number: 

  • TQ342

Tab.1

Preparation process parameters of PBAT fiber"

螺杆温度/℃ 纺丝温
度/℃		 纺丝速度/
(m·min-1)		 喷丝板
参数
Ⅰ区 Ⅱ区 Ⅲ区 Ⅳ区
255 258 260 260 260 800 36×0.3
×0.9

Tab.2

1H NMR analysis data of chip PBAT"

BT段含
量/%		 BA段含
量/%		 BT段序
列长度		 BA段序
列长度		 无规度
46.8 53.2 1.80 2.21 1.008

Tab.3

Spinning of chip at different temperatures"

纺丝温度/℃ 纺丝情况 纺丝性
250 硬头丝 差
260 较好 好
270 断丝多 差
280 不可纺 差

Tab.4

Mechanical properties of PBAT fibers with different drafting ratios"

牵伸
倍数		 线密度/
dtex		 断裂强度/
(cN·dtex-1)		 断裂伸
长率/%
1.4 262.38 1.15 186.6
1.7 257.74 1.25 170.4
2.0 235.30 1.38 164.4
2.3 189.46 1.69 133.7
2.5 139.60 2.24 66.8

Tab.5

Influence of different drafting rates on PBAT fibers"

牵伸
倍数		 声速取向因子/
(km·s-1)		 结晶
度/%		 回潮
率/%
1.4 0.402 31.43 1.46
1.7 0.431 31.73 1.33
2.0 0.462 35.85 1.13
2.3 0.576 41.67 0.81

Fig.1

XRD patterns of fibers at different drafting rates"

Fig.2

Effects of abiotic environmental factors on fiber fracture strength(a) and elongation at break (b)"

Fig.3

Effects of degradation time on fiber fracture strength(a) and elongation at break (b)"

Fig.4

Sueface SEM images of samples after 4 weeks of degradation. (a) Undegraded fibers;(b)Degradation in Garden soil;(c)Neutral hydrolysis degradation;(d)Neutral enzymatic degardation"

Fig.5

Effect of degradation period on crystallinity"

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