Fundamental study of mutual separation of waste prastic using critical surface tension.

利用临界表面张力相互分离废旧塑料的基础研究。

• 批准号: 09450382
• 负责人: MATSUOKA Isao
• 金额: $ 2.75万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450382/
• 关键词: waste prastic; flotation; critical surface tension; mutual separation; 浮沈分離; 表面張力; 接触角; ポリ塩化ビニル; プラスチック; 湿潤剤; 界面活性剤; 吸着

The basic research was aimed at separation of waste plastics through gamma flotation enhanced with wetting agents. Plates of PVC and PET with several commercial wetting agents were used in the investigation. Zismann plot was drawn for solution of each wetting agent with a series of concentration, based on measured surface tension g and contact angle q on PVC or PET.Critical surface tension of PVC and PET was calculated by extrapolating the curve of Zismann plot to q =1. Resulting values for critical surface tension were 38.7mN/m forPVTand39.5mN/m for PET.When PVA solution was used. the two samples yielded similar result for critical surface tension as -45 mN/m, showing more hydrophillic property. Tannic acid was found to convert contact angle of the its solution on PVC much smaller than that of distilled water. Adsorption of PVA and tannic acid was also experimentally measured by chemical analysis.Gamma flotation was performed for PVC and PET in the presence of wetting agents. Critical surface tension was also attained as a point which recovery of each samples would fall drastically in the relation between recovery and surface tension of the conditioned solution. In gamma flotation behavior of bubbles dependent on wetting agents would also affect recovery, apart from surface property of the samples themselves.

对润湿剂强化γ浮选分离废塑料进行了基础研究。在调查中使用了PVC和PET板与几个商业润湿剂。根据测定的PVC或PET表面张力g和接触角q，绘制了不同浓度的润湿剂溶液的Zismann曲线，并将Zismann曲线外推至q =1，计算出PVC和PET的临界表面张力。当用PVA溶液时，其临界表面张力为38.7mN/m，PET为39.5mN/m。两种样品的临界表面张力结果相似，均为-45 mN/m，显示出更好的亲水性。结果表明，单宁酸溶液对PVC的接触角比蒸馏水溶液的接触角小得多。用化学分析法测定了PVA和单宁酸对PVC和PET的吸附作用，并在润湿剂存在下对PVC和PET进行了γ浮选。临界表面张力也达到了一个点，每个样品的回收率将急剧下降的关系，回收率和表面张力的条件溶液。在伽马浮选中，除了样品本身的表面性质外，取决于润湿剂的气泡行为也会影响回收率。

项目成果

野澤美樹・田路和幸・松岡功: "ストラティファイド形成による微粒子の機能化(II)新しい触媒設計へのアプローチ" 資源・素材学会平成10年度春季大会要旨集. 73- (1998)

Miki Nozawa、Kazuyuki Taro、Isao Matsuoka：“通过分层形成实现细颗粒的功能化 (II)：催化剂设计的新方法”日本资源材料学会 1998 年春季会议记录 73- (1998)。

M.Nozawa, K.Tohji, I.Matsuoka: "The study of the interaction between plastic and surfactant" Annual report of the institute for resources and materials. 100. (1998)

M.Nozawa、K.Tohji、I.Matsuoka：《塑料与表面活性剂相互作用的研究》资源材料研究所年度报告。

野澤美樹・田路和幸・松岡功: "プラスチック表面と浸潤剤の相互作用に関する研究" 資源・素材学会平成10年度春季大会要旨集. 100- (1998)

Miki Nozawa、Kazuyuki Taro、Isao Matsuoka：“塑料表面与渗透剂之间相互作用的研究”日本资源材料学会 1998 年春季会议摘要 100- (1998)。

K.Tohji: "Stratification on the oil droplet and it's application for the catalyst" KINZOKU. 68-4. 281-314 (1998)

K.Tohji：“油滴的分层及其在催化剂中的应用”KINZOKU。

田路和幸: "油滴表面でのストラティファイド形成とその触媒への応用" 金属. 68・4. 281-314 (1998)

田地和之：“油滴表面的分层形成及其在催化剂中的应用”金属 68・4（1998）。