辛烯基琥珀酸酯⁃羧甲基淀粉膜力学性能的研究

doi:10.19491/j.issn.1001-9278.2020.04.005

中国塑料 ›› 2020, Vol. 34 ›› Issue (4): 25-29.DOI: 10.19491/j.issn.1001-9278.2020.04.005

辛烯基琥珀酸酯⁃羧甲基淀粉膜力学性能的研究

宋彦志¹, 祝志峰¹(), 李世安²

^1.安徽工程大学纺织面料安徽省重点实验室，安徽芜湖 241000
^2.徐州众恒淀粉科技有限公司，江苏徐州 221000

收稿日期:2019-10-09 出版日期:2020-04-26 发布日期:2020-04-26
基金资助:
安徽省高校领军人才团队项目(2015LJRCTD001)

Study on Mechanical Performance of Octenylsuccinyl⁃Carboxymethyl Starch Films

Yanzhi SONG¹, Zhifeng ZHU¹(), Shian LI²

^1.Key Laboratory of Textile Fabrics of Anhui Province, Anhui Polytechnic University, Wuhu 241000, China
^2.Xuzhou Zhongheng Starch Technology Co, Ltd, Xuzhou 221000, China

Received:2019-10-09 Online:2020-04-26 Published:2020-04-26
Contact: Zhifeng ZHU E-mail:zhuzhifengwu@sina.com

摘要/Abstract

摘要：

以玉米淀粉、一氯乙酸及辛烯基琥珀酸酐为原料，通过2步反应制备了辛烯基琥珀酸酯?羧甲基油水两亲性淀粉（OS?CMS）。采用红外光谱进行结构表征；用X射线衍射仪进行薄膜结晶度测试。通过力学性能测试，研究了在不同油水官能团摩尔比及变性程度对OS?CMS薄膜力学性能的影响。结果表明，经变性后的OS?CMS薄膜结晶度降低；随着摩尔比的提高，OS?CMS薄膜的断裂强度有所上升，断裂伸长率先上升后下降，最终提高了薄膜的韧性，在2种官能团摩尔比为1∶1时，薄膜的断裂伸长率最大；随着变性程度的提高，OS?CMS薄膜的断裂强度与断裂伸长率也逐渐增加，进一步改善了力学性能。

关键词: 淀粉膜, 力学性能, 两亲性淀粉, 摩尔比, 变性程度

Abstract:

To overcome the rigid and brittle defects of starch films, the octenylsuccinate?carboxymethyl oil?water amphiphilic starch (OS?CMS) was synthesized through a two?step reaction using corn starch, chloroacetic acid and octenylsuccinic anhydride as raw materials. The chemical structure and crystallinity of the resulting films were characterized by Fourier?transform infrared spectroscopy and X?ray diffraction, respectively, and the mechanical evaluation were conducted for the samples at different molar ratios of functional groups and degrees of starch modification. The results indicated that the surface modification led to a decrease in crystallinity of OS?CMS films. The breaking strength of OS?CMS films increased with an increase of molar ratio, but their elongation at break increased at first and then tended to decrease. As a result, the films achieved an improvement in toughness. The OS?CMS films obtained a maximum value in elongation at break at the OS/CMS molar ratio of 1/1, and their breaking strength and elongation at break were found to increase gradually with an increase of the degree of denaturation, indicating an enhancement in mechanical performance.

Key words: starch film, mechanical property, amphiphilic starch, molar ratio, modification level

中图分类号:

TQ 321

宋彦志, 祝志峰, 李世安. 辛烯基琥珀酸酯⁃羧甲基淀粉膜力学性能的研究[J]. 中国塑料, 2020, 34(4): 25-29.

Yanzhi SONG, Zhifeng ZHU, Shian LI. Study on Mechanical Performance of Octenylsuccinyl⁃Carboxymethyl Starch Films[J]. China Plastics, 2020, 34(4): 25-29.

图/表 6

图1 变性程度相近的油水两亲性淀粉的OS?CM摩尔比

Fig.1 OS?CM molar ratio of oil?water amphiphilic starch with similar modification extent

图2 OS?CM摩尔比相近的油水两亲性淀粉的变性程度

Fig.2 Modification extent of oil?water amphiphilic starch with similar OS?CM molar ratio

图3 ATS和OS?CMS的FTIR谱图

Fig.3 FTIR spectra of AST and OS?CMS

淀粉种类	P_o/%	断裂强度			断裂伸长率		厚度
淀粉种类	P_o/%	平均值/MPa	CV/%	平均值/%	CV/%	平均值/mm	CV/%
酸解淀粉	-	38.0	5.30	2.02	11.8	0.080	9.76
OS?CM淀粉	0	34.6	7.50	2.58	7.36	0.077	6.11
	20.0	34.5	7.12	2.68	9.48	0.073	5.25
	48.4	35.8	4.86	4.18	8.92	0.086	9.40
	69.0	35.9	10.80	3.15	9.31	0.067	8.98
	100.0	36.1	6.79	2.24	6.97	0.063	8.66

表1 油水官能团摩尔比对淀粉薄膜力学性能的影响

Tab.1 Effect of molar ratio of oil/water functional groups on starch film fracture strength and elongation at break

图4 淀粉薄膜的XRD谱图

Fig. 4 X?ray diffraction patterns of the starch films

淀粉种类	变性程度	断裂强度		断裂伸长率		厚度
淀粉种类	变性程度	平均值/MPa	CV/%	平均值/%	CV/%	平均值/mm	CV/%
酸解淀粉	-	38.0	5.30	2.02	11.8	0.080	9.76
OS?CM淀粉	0.016	30.8	9.92	2.92	9.22	0.065	8.56
	0.030	35.9	10.8	3.15	9.35	0.067	8.98
	0.049	37.5	9.32	3.53	8.52	0.074	7.98
	0.065	39.2	8.28	3.88	8.35	0.088	7.52

表2 变性程度对淀粉薄膜力学性能的影响

Tab.2 Effect of modification extent on starch film fracture strength and elongation at break

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辛烯基琥珀酸酯⁃羧甲基淀粉膜力学性能的研究

Study on Mechanical Performance of Octenylsuccinyl⁃Carboxymethyl Starch Films

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