卢秋晓,陈俊颖,廖俊杰,汪志伟,姚凯,曾小君.用谷氨酸为交联剂制备玉米交联氧化淀粉胶黏剂及性能研究[J].包装工程,2023,44(21):134-143.
LU Qiu-xiao,CHEN Jun-ying,LIAO Jun-jie,WANG Zhi-wei,YAO Kai,ZENG Xiao-jun.Preparation and Properties of Corn Crosslinking Oxidized Starch Adhesive with Glutamic Acid as Crosslinking Agent[J].Packaging Engineering,2023,44(21):134-143. |
| 用谷氨酸为交联剂制备玉米交联氧化淀粉胶黏剂及性能研究 |
| Preparation and Properties of Corn Crosslinking Oxidized Starch Adhesive with Glutamic Acid as Crosslinking Agent |
| 投稿时间：2023-02-10 |
| DOI：10.19554/j.cnki.1001-3563.2023.21.017 |
| 中文关键词: 玉米淀粉 谷氨酸 胶黏剂 改性 胶合强度 |
| 英文关键词: corn starch glutamic acid adhesive modified adhesive strength |
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| 中文摘要: |
| 目的 改善淀粉胶黏剂胶合强度低、耐水性差等缺点，通过对玉米淀粉(CS)进行改性，制备玉米交联氧化淀粉胶黏剂(CCOSA)。方法 以CS为主要原料，以生物质材料谷氨酸为交联剂，以过氧化氢为氧化剂，采用先交联后氧化的方法制备CCOSA。通过单因素试验确定制备玉米交联淀粉(CCS)和玉米交联氧化淀粉(CCOS)的最优条件，通过FT-IR对制备的CCS 和CCOS进行结构表征，并测定制备的CCOSA的基本理化性能、耐水时间和胶合强度。结果 得到了制备CCS的优化工艺条件，当CS的质量为20 g、谷氨酸的质量为1.0 g、pH为9、反应温度为55 ℃、反应时间为1.5 h时，制得的CCS的沉降积(0.55 mL)最小、交联度最大。得到了制备CCOS的优化工艺条件，在CCS的质量为20 g、FeSO4的用量为CCS质量的0.1%、质量分数为30%过氧化氢的用量(体积)为2 mL、反应温度为50 ℃、pH为3、反应时间为3 h时，制得的CCOS的羧基含量为0.184%，对CCS的氧化效果最好。通过FT-IR分析可知，CCS在1 157.22 cm−1处出现了C—N伸缩振动吸收峰，CCOS在1 731.35 cm−1处出现了C=O伸缩振动吸收峰，此吸收峰向高波数移动，而且此峰相对于1 653.25 cm−1典型的淀粉衍生物C=O吸收峰的强度明显增强。在此条件下制得的CCOSA的胶合强度为6.15 MPa，比玉米交联淀粉胶黏剂(CCSA)、玉米氧化淀粉胶黏剂(COSA)和未改性玉米淀粉胶黏剂(CSA)的胶合强度分别提高了38.83%、107.07%、352.21%，并且CCOSA的耐水性得到明显提高。结论 FT-TR分析结果表明，采用先交联后氧化的方法成功制得了CCOS，制得的CCOSA的胶合强度和耐水性得到明显提高。 |
| 英文摘要: |
| The work aims to modify corn starch (CS) to prepare of the corn crosslinking oxidized starch adhesive (CCOSA), so as to improve the water resistance and the adhesive strength of CCOSA. CS, biomass materials glutamic acid and hydrogen peroxide were chosen as the main raw materials, crosslinking agent, and oxidant, respectively. Through crosslinking and then oxidizing processes, the CCOSA was prepared. The optimal conditions of the corn crosslinking starch (CCS) and the corn crosslinking oxidized starch (CCOS) were determined by single factor tests, and the structural characteristics, adhesive strength and water resistance were measured. The optimal process conditions of the CCS were as follows:CS was 20.0 g, glutamic acid was 1.0 g, pH value was 9.0, reaction temperature was 55 ℃, and reaction time was 1.5 h. Under this condition, the sedimentation of the prepared CCS was the smallest, while the degree of CCS was the largest. Furthermore, the optimal process conditions of the CCOS were as follows:20 g of CCS, 0.1% the mass of total CCS amount of FeSO4, 2 mL of 30% mass fraction hydrogen peroxide, reaction temperature of 50 ℃, pH value of 3 and reaction duration of 3 h. The carboxyl content of the corn crosslinking oxidized starch reached 0.184% by this process, which has the best oxidation effect on corn crosslinking starch. Fourier infrared spectrum analysis showed that the C—N stretching vibration absorption peaks appeared in the CCS molecule at 1 157.22 cm−1, the C=O stretching vibration absorption peaks appeared in the CCOS molecule at 1 731.35 cm−1, and these absorption peaks moved to a higher wave number, and the intensity of these peaks were significantly higher than that of typical starch derivatives C=O absorption peaks at 1 653.25 cm−1. Under these conditions, the CCOSA were prepared successfully. The adhesive strength of CCOSA was 6.15 MPa. Compared with CCSA, COSA and CSA, its adhesive strength was increased by 38.83%, 107.07%, and 352.21%, respectively. In addition, the water resistance of the CCOSA was improved significantly. The FT-TR analysis shows that CCOSA are prepared successfully through crosslinking and then oxidizing processes, and the water resistance of CCOSA is significantly improved. |
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