以大型文化纸机白水作为研究对象,研究短循环白水中溶解胶体物(Dissolved and Colloidal Substance,即DCS)的来源,DCS和纸机排水、纸料留着率及纸张强度之间的关联性。结果发现白水中DCS中的无机物主要来源是填料碳酸钙,有机物来源主要...以大型文化纸机白水作为研究对象,研究短循环白水中溶解胶体物(Dissolved and Colloidal Substance,即DCS)的来源,DCS和纸机排水、纸料留着率及纸张强度之间的关联性。结果发现白水中DCS中的无机物主要来源是填料碳酸钙,有机物来源主要是浆料和化学品;当短循环白水中DCS含量超过900 mg·L^(-1)时,纸机开始排水,短循环白水中DCS含量能反映纸机清洁程度;同时DCS含量对纸料总保留率、灰分保留率及纸张强度都有影响。展开更多
Zinc oxide,which has photocatalytic activity,is used as a white pigment for cosmetics,resulting in a certain amount of sebum on the skin to be decomposed by the ultraviolet radiation in the sunlight.In this work,zinc ...Zinc oxide,which has photocatalytic activity,is used as a white pigment for cosmetics,resulting in a certain amount of sebum on the skin to be decomposed by the ultraviolet radiation in the sunlight.In this work,zinc phosphates as novel white pigments for use in cosmetics were prepared from zinc nitrate and sodium dihydrogen phosphate,and then ball-milled under various conditions.The chemical composition,powder properties,photocatalytic activity,color phase,moisture retention,and smoothness of the zinc phosphates were studied.The zinc phosphate particle size was decreased by mechanical treatment.In particular,the sample treated with sodium lactate solution had much smaller particles.The milled zinc phosphates exhibited less photocatalytic activity than zinc oxide,and thus should not decompose sebum on the skin.The milled zinc phosphates showed sufficiently high reflectance within the range of visible light to act as novel white pigments.The sample treated with sodium lactate solution had higher water retention than the sample treated with water.Further,the slip resistance and roughness of the powder particles decreased as a result of treatment with sodium lactate solution.展开更多
文摘以大型文化纸机白水作为研究对象,研究短循环白水中溶解胶体物(Dissolved and Colloidal Substance,即DCS)的来源,DCS和纸机排水、纸料留着率及纸张强度之间的关联性。结果发现白水中DCS中的无机物主要来源是填料碳酸钙,有机物来源主要是浆料和化学品;当短循环白水中DCS含量超过900 mg·L^(-1)时,纸机开始排水,短循环白水中DCS含量能反映纸机清洁程度;同时DCS含量对纸料总保留率、灰分保留率及纸张强度都有影响。
基金The support of this work by The Cosmetology Research Foundation is gratefully acknowledged.
文摘Zinc oxide,which has photocatalytic activity,is used as a white pigment for cosmetics,resulting in a certain amount of sebum on the skin to be decomposed by the ultraviolet radiation in the sunlight.In this work,zinc phosphates as novel white pigments for use in cosmetics were prepared from zinc nitrate and sodium dihydrogen phosphate,and then ball-milled under various conditions.The chemical composition,powder properties,photocatalytic activity,color phase,moisture retention,and smoothness of the zinc phosphates were studied.The zinc phosphate particle size was decreased by mechanical treatment.In particular,the sample treated with sodium lactate solution had much smaller particles.The milled zinc phosphates exhibited less photocatalytic activity than zinc oxide,and thus should not decompose sebum on the skin.The milled zinc phosphates showed sufficiently high reflectance within the range of visible light to act as novel white pigments.The sample treated with sodium lactate solution had higher water retention than the sample treated with water.Further,the slip resistance and roughness of the powder particles decreased as a result of treatment with sodium lactate solution.
