Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (06): 180-186.doi: 10.13475/j.fzxb.20210104707

• Comprehensive Review • Previous Articles     Next Articles

Research progress and status quo of heat-resistant polylactic acid materials

LIU Yanlin1, GU Weiwen1, WEI Jianfei1,2,3, WANG Wenqing1, WANG Rui1,2,3()   

  1. 1. School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
    2. Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing Institute of Fashion Technology, Beijing 100029, China
    3. Beijing Engineering Research Center of Textile Nano Fiber, Beijing Institute of Fashion Technology, Beijing 100029, China
  • Received:2021-01-20 Revised:2021-05-28 Online:2022-06-15 Published:2022-07-15
  • Contact: WANG Rui E-mail:clywangrui@bift.edu.cn

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Abstract:

Aiming at the low mechanical strength, poor toughness, slow crystallization speed, low crystallinity, and poor heat resistance of polylactic acid products, modification methods and mechanisms for improving the heat resistance of polylactic acid materials were reviewed. The review was concentrated on blending modification involving polymer composite modification and filling modification, chain structure modification encompassing copolymerization modification and crosslinking modification, and crystal modification including additive nucleating agent modification and processing technology modification. The advantages and disadvantages of each modification method were briefly analyzed, and the formation of polylactic acid stereo complex crystals and its influencing factors were introduced and discussed in detail. The development direction and prospect of polylactic acid materials were analyzed and prospected. The rereview revealed that the most popular modification method is to adjust and control the heat resistance of polylactic acid materials through crystal modification and modification of processing conditions.

Key words: polylactic acid, stereo complex, heat-resistant property, blending modification, chain structure modification, crystal modification

CLC Number: 

  • TS151

Tab.1

PLA crystal form and parameters"

晶型 晶系 晶体类别 a/nm b/nm c/nm α/(°) β/(°) γ/(°) 螺旋构象 熔点/℃
α 正交 HC 1.05 0.61 2.88 90 90 90 103 180
α' 假正交 HC 1.06 0.61 2.88 90 90 90 103 —
β 三方 HC 1.052 1.052 0.88 90 90 90 31 175
γ 正交 HC 0.995 0.625 0.88 90 90 90 31 —
SC 三斜 SC 0.916 0.916 0.87 109.2 109.2 109.8 31 225
SC 三斜 SC 0.912 0.913 0.93 110 110 109 31 225
SC 三方 SC 1.498 1.498 0.87 90 90 120 31和32 225
SC 三方 SC 1.500 1.50 0.823 90 90 120 31和32 225

Fig.1

Crystal structure of SC-PLA"

Fig.2

PLLA/PDLA complex recrystallizes during heating process to form the mechanism of SC stereocomplex"

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