Fabrication of porous structure of poly(e-caprolactone) via microcellular injection molding combined with chemical foaming

WANG Xiaofeng; JIANG Jing; HOU Jianhua; WANG Shiwei; LI Qian; TURNG Lih-Sheng; SHEN Changyu

doi:10.3969/j.issn.0438-1157.2014.06.059

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Fabrication of porous structure of poly(e-caprolactone) via microcellular injection molding combined with chemical foaming

更新时间：2025-12-10

- Fabrication of porous structure of poly(e-caprolactone) via microcellular injection molding combined with chemical foaming
- CIESC Journal Issue 6, Pages: 2386-2392(2014)
- 作者机构：
  
  1. 微纳成型技术国际联合研究中心, 微成型技术河南省重点实验室,河南,郑州,450001
  2. 郑州大学橡塑模具国家工程研究中心,河南,郑州,450002
  3. The Wisconsin Institute for Discovery,-Madison,Madison,WI,UW,USA,53705
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.06.059
  CLC： Q328.06
- Online First：05 June 2014，
  
  Published：05 June 2014
- 稿件说明：
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WANG Xiaofeng, JIANG Jing, HOU Jianhua, et al. Fabrication of porous structure of poly(e-caprolactone) via microcellular injection molding combined with chemical foaming[J]. CIESC Journal, 2014, (6): 2386-2392.
DOI：

WANG Xiaofeng, JIANG Jing, HOU Jianhua, et al. Fabrication of porous structure of poly(e-caprolactone) via microcellular injection molding combined with chemical foaming[J]. CIESC Journal, 2014, (6): 2386-2392. DOI： 10.3969/j.issn.0438-1157.2014.06.059.

摘要

将超临界气体发泡技术与化学发泡技术联合用于制备多孔材料。采用碳酸氢钠作为化学发泡剂，将聚己内酯与碳酸氢钠挤出共混之后，使用传统注射成型和微注射成型，进行了发泡实验对比。结果表明，物理化学联合发泡用于制备多孔材料具有可行性，化学发泡剂的加入不仅改善了整体发泡效果，还能够作为气泡成核剂促进物理发泡的质量。对于所得结构在一定程度上表现的泡孔相互连通性进行了讨论，同时对泡孔壁面上出现的“网”状结构进行了分析。气泡在成核生长过程中，对于泡孔壁产生多方向拉伸的作用，相邻气泡共同作用于公共壁面，最终导致壁面部分形成“网”状结构。

Abstract

The physical foaming technology of supercritical fluid foaming and chemical foaming technology were combined to fabricate porous structure for polymers. Sodium bicarbonate was used as a chemical foaming agent. Poly(ε-caprolactone) (PCL) was first blended with sodium bicarbonate by a twin screw extruder and pelletized. The different foaming processes were conducted on a conventional injection molding machine and a microcellular injection molding machine separately. The foaming results were investigated by comparing the two methods of injection molding and microcellular injection molding. The results revealed that it was feasible by combining physical foaming and chemical foaming to fabricate porous structure for PCL

whose foaming quality was better than that of only chemical foaming method. The introduction of chemical foaming agent not only improved general foaming

but also served as nucleating agent of the gas bubbles of physical foaming. The interconnectivity of the pores was investigated

as well as the "web" structure on the cell walls. When the bubbles were growing

the cell walls were stretched in different directions

and the mutual wall of neighbored pores was stretched by the pores

therefore the "web" structure was obtained.

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