漂白紫胶水溶胶的制备

doi:10.7506/spkx1002-6300-200918029

食品科学 ›› 2009, Vol. 30 ›› Issue (18 ): 142-147.doi: 10.7506/spkx1002-6300-200918029

漂白紫胶水溶胶的制备

李凯^1,2，周梅村¹，张弘^2,*，郑华²，甘瑾²，冯颖²，张雯雯²

1.昆明理工大学化学工程学院 2.中国林业科学研究院资源昆虫研究所

收稿日期:2009-04-29 出版日期:2009-09-15 发布日期:2010-12-29
通讯作者: 张弘 E-mail:kmzhhong@163.com
基金资助:
国家林业局“948”项目(2008-4-78)；国家林业局推广项目([2005]72)

Preparation of Aqueous Bleached Shellac Dispersion

LI Kai1,2，ZHOU Mei-cun1，ZHANG Hong2,*，ZHENG Hua2，GAN Jin2，FENG Ying2，ZHANG Wen-wen2

1. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650224, China；
2. Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, China

Received:2009-04-29 Online:2009-09-15 Published:2010-12-29
Contact: ZHANG Hong E-mail:kmzhhong@163.com

摘要/Abstract

摘要：

为解决紫胶改性中有机或碱性溶剂系统带来的困扰，采用过饱和法制备出弱酸性且具有良好分散性的漂白紫胶水溶胶。通过单因素试验选取因素水平，根据Box-Benhnken 中心组合试验设计原理采用三因素三水平响应曲面法，以平均粒径为响应值做响应面和等值曲线。结果表明，最佳工艺条件为转速11054r/min、滴加速度14.25ml/min、漂白紫胶乙醇溶液的浓度6.42%，得出实际最佳平均粒径为20.34μm。通过激光粒度仪对优化条件下制得的漂白紫胶水溶胶进行粒度分析，其99.99% 的粒子粒径在小于等于0.6μm 以下均匀分布。通过光学显微镜与扫描电镜(SEM)对水溶胶进行表征，漂白紫胶水溶胶中漂白紫胶以球形微粒存在且可以形成光滑的树脂膜。

关键词: 过饱和法, 漂白紫胶水溶胶, 亚微米, 成膜性, 无皂乳液

Abstract:

To solve the problems brought by organic or basic solvents in the modification process of shellac, this study used supersaturation method to prepare a weakly acidic, well-dispersed aqueous dispersion of bleached shellac. A three-variable, three-level Box-Behnken experimental design combining with response surface modeling (RSM) was employed for minimizing average particle size of bleached shellac dispersion. A regression model was proposed for the average particle size as a function of three crucial process parameters. A minimum average particle size of 20.34μm was obtained under the optimized conditions: rotational speed of dispersion machine 11054 r/min, dropping speed of shellac, and alcohol concentration 6.42%. Granularity analysis using a laser granularity analyzer indicated that the size of 99.99% particles was distributed uniformly, less than or equal to 0.6 μm. Optical microscope and scanning electron microscope (SEM) observations revealed that bleached shellac existed in globular particles in the dispersion and could form smooth resin membrane.

Key words: supersaturation method, aqueous bleached shellac dispersion, submicron, film-forming capacity, soapfree emulsion

中图分类号:

李凯1,2，周梅村1，张弘2,*，郑华2，甘瑾2，冯颖2，张雯雯2. 漂白紫胶水溶胶的制备[J]. 食品科学, 2009, 30(18 ): 142-147.

LI Kai1,2，ZHOU Mei-cun1，ZHANG Hong2,*，ZHENG Hua2，GAN Jin2，FENG Ying2，ZHANG Wen-wen2. Preparation of Aqueous Bleached Shellac Dispersion[J]. FOOD SCIENCE, 2009, 30(18 ): 142-147.

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漂白紫胶水溶胶的制备

Preparation of Aqueous Bleached Shellac Dispersion

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