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.

基础研究旨在通过润湿剂增强伽马浮选来分离废物塑料。调查使用了带有几种商业润湿剂的PVC和PET的板。基于测量的表面张力G和PVC或PET PET的接触角Q，绘制了Zismann图，以用于每种润湿剂的溶液。PVC的临界表面张力和PET的临界表面张力通过将Zismann图的曲线推送到Q = 1来计算PET。当使用PVA溶液时，临界表面张力的结果值为38.7mn/m forpvtand 39.5mn/m。这两个样品的临界表面张力与-45 mn/m产生相似的结果，显示出更多的水直射特性。发现单宁酸将其溶液的接触角转化为PVC上的溶液的接触角，比蒸馏水小得多。还通过化学分析测量了PVA和单宁酸的吸附。还达到了临界表面张力，即每个样品的恢复将在条件溶液的恢复和表面张力之间急剧下降。在样品本身的表面特性之外，在伽马浮点行为中，取决于润湿剂的气泡行为也会影响恢复。

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。

野澤 美樹・田路 和幸・松岡 功: "プラスチック表面と湿潤剤の相互作用に関する研究" 資源・素材学会平成10年度春季大会にて口頭発表. (1998)

Miki Nozawa、Kazuyuki Taji、Isao Matsuoka：“塑料表面与润湿剂之间相互作用的研究”在日本资源与材料学会 1998 年春季会议上的口头报告（1998 年）。