| 含铬革屑胶原水解物对石膏缓凝作用的研究 |
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| 引用本文： | 丁晓良,单志华,龙忠珍,陈治军.含铬革屑胶原水解物对石膏缓凝作用的研究[J].中国皮革,2019(1):26-30. |
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| 作者姓名： | 丁晓良 单志华 龙忠珍 陈治军 |
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| 作者单位： | 四川大学皮革化学与工程教育部重点实验室;徐州鸿丰高分子材料有限公司 |
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| 基金项目： | 苏北科技专项Z XZ2017014 |
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| 摘 要： | 利用废弃含铬革屑在碱热条件下获得的胶原水解物对建筑石膏进行缓凝作用,实现废弃物资源化利用。研究了水解物对石膏的凝结时间、水化温度、绝干抗折强度及晶体形貌的影响。结果表明:随着水解物用量的增加,石膏的缓凝时间延长,而石膏的抗折强度逐渐降低,利用扫描电镜观察到石膏晶体的生长习性和形貌也发生了不同程度的改变,并从晶体变化的角度表达了水解物缓凝特征。
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| 关 键 词： | 含铬革屑 缓凝剂 石膏 晶体形貌 缓凝机理 |
Effect of collagen hydrolysate extracted from chrome scraps on gypsum delayed coagulation |
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| DING Xiaoliang,SHAN Zhihua,LONG Zhongzhen,CHEN Zhijun.Effect of collagen hydrolysate extracted from chrome scraps on gypsum delayed coagulation[J].China Leather,2019(1):26-30. |
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| Authors: | DING Xiaoliang SHAN Zhihua LONG Zhongzhen CHEN Zhijun |
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| Affiliation: | (The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University,Chengdu 610065,China;Xuzhou Hongfeng Polymer Materials Limited Company,Xuzhou 221217,China) |
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| Abstract: | The retarding effect of building gypsum was carried out by collagen hydrolysate extracted from chrome scraps under alkaline-heating conditions.The recycling of waste was achieved.The influence of collagen hydrolysate on the gypsum setting time,hydrate temperature,absolute.dry breaking strength and crystal morphology was studied. The results show that with the increasing of collagen hydrolysate dosage,the delayed coagulation time of gypsum is prolonged,and the flexural strength of gypsum is gradually reduced.The growth habit and morphology of gypsum crystal are also changed through scanning electron microscopy.The delayed coagulation feature of collagen hydrolysate is expressed from the perspective of crystal change. |
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| Keywords: | chrome scraps retardant gypsum crystal morphology delayed coagulation mechanism |
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