阅读说明：本技术 一种定量表征乳液胶体干燥、固化时间的测定装置及方法 (Device and method for measuring drying and curing time of quantitative characterization emulsion colloid ) 是由 徐淑浩 李国智 朱雪峰 龙雨蛟 陈杰 陈康宁 杨仁礼 于 2019-09-18 设计创作，主要内容包括：本发明涉及一种定量表征乳液胶体干燥、固化时间的测定装置及方法,属于乳液胶体的表征测定技术领域,本发明的测定装置包括测定板和刮板,测定板上设有呈一定角度倾斜的凹槽；测定方法包括：将待测乳液胶体放置在测定板凹槽深的一端,用刮板刮动使乳液胶体在凹槽内均匀铺展、填充,通过观察记录凹槽内乳液胶体由白至透明变化线与沟槽深度刻度平行时所需时间,即可得出不同厚度乳液胶体的干燥时间；本发明不需要配套大型检测仪器,即可完成乳液胶体干燥时间或干燥速度,具有简便快捷、投资少的特点。(The invention relates to a device and a method for quantitatively characterizing the drying and curing time of an emulsion colloid, belonging to the technical field of characterization and determination of the emulsion colloid, wherein the device comprises a determination plate and a scraper plate, wherein the determination plate is provided with a groove inclined at a certain angle; the determination method comprises the following steps: placing the emulsion colloid to be measured at one deep end of the groove of the measuring plate, scraping by using a scraper to enable the emulsion colloid to be uniformly spread and filled in the groove, and observing and recording the time required when the emulsion colloid in the groove changes from white to transparent and is parallel to the depth scale of the groove, so that the drying time of the emulsion colloids with different thicknesses can be obtained; the invention can complete the drying time or drying speed of the emulsion colloid without matching with a large-scale detection instrument, and has the characteristics of simplicity, convenience, rapidness and low investment.)

1. A quantitative characterization emulsion colloid dry, solidification time's survey device which characterized in that: the measuring device for quantitatively characterizing the drying and curing time of the emulsion colloid comprises: a measuring plate (A) and a scraper (B); the measuring plate (A) is provided with a groove (C), the depth of the groove (C) gradually changes from deep to zero along the length direction of the measuring plate (A), and the inclination of the bottom surface of the groove (C) is 15-30 degrees; the surface roughness of the bottom surface of the scraper (B) and the surface of the groove of the measuring plate (A) is as follows: ra is less than 0.3 μm.

2. The apparatus for quantitatively characterizing the drying and curing time of emulsion colloid as claimed in claim 1, wherein: and groove depth scale marks (D) at corresponding positions are marked on two sides of the groove (C).

3. A determination method for quantitatively characterizing the drying and curing time of emulsion colloid is characterized by comprising the following steps: the measuring method for quantitatively characterizing the drying and curing time of the emulsion colloid comprises the following steps:

(1) placing the emulsion colloid sample to be tested on the measuring device of claim 1, and scraping the emulsion colloid sample into a continuous emulsion colloid sample film in the groove (C) by using a scraper; uniformly spreading and filling the emulsion colloid sample in the groove (C);

(2) and simultaneously observing and recording the condition and the corresponding time of drying the emulsion film at different positions in the groove of the measuring device into a continuous uniform transparent film, thereby obtaining the drying time of the emulsion film with different thicknesses.

4. The method for determining the drying and curing time of the emulsion colloid according to claim 3, wherein: and (2) placing the emulsion colloid sample in the step (1) at the deep end of the groove of the measuring device, and vertically and smoothly scraping the emulsion colloid to the shallow end of the groove by using a scraper (B).

5. The method for determining the drying and curing time of the emulsion colloid according to claim 3, wherein: testing the environmental temperature: 25 ± 5 ℃, test environment humidity: 65 +/-5%, and the wind speed in the test environment is less than 0.3 m/s.

6. The method for determining the drying and curing time of the emulsion colloid according to claim 3, wherein: step (1) the time for the spatula to scrape over the assay plate (a) of claim 1 and form a continuous sample film in the recess (C) is less than 3 seconds.

7. The method for determining the drying and curing time of the emulsion colloid according to claim 3, wherein: and (3) in the step (2), the time required for the bottom end of the emulsion film to be parallel to the transparent change line and the groove depth scale line (D) from white is the time required for drying the adhesive film with the thickness.

Technical Field

The invention belongs to the technical field of characterization and determination of emulsion colloid, and particularly relates to a determination device and method for quantitatively characterizing drying and curing time of emulsion colloid.

Background

The drying or curing time of the emulsion colloid has no definite determination and characterization mode, and the lowest film forming temperature of the colloid can be determined by referring to the determination of the white point temperature and the lowest film forming temperature of the emulsion and the coating for the coating and the polymer dispersion for plastics in GB/T9267-2008/ISO 2115:1996, but the drying condition of the whole colloid or the accurate curing time is not enough to be characterized; reference is made to GBT 19466.2-2004/ISO 11357-2:1999 Plastic Differential Scanning Calorimetry (DSC) part 2: glass transition temperature measurement the glass transition temperature of a colloid can be measured, but the internal transition critical point of the colloid is mainly explored, and the glass transition temperature measurement has no clear guiding significance in the actual emulsion research.

Disclosure of Invention

In order to overcome the problems in the background art, the invention provides a device and a method for quantitatively characterizing the drying and curing time of emulsion colloid, which can finish the drying time or drying speed of the emulsion colloid without matching with a large-scale detection instrument and have the characteristics of simplicity, convenience, rapidness and less investment.

In order to realize the purpose, the invention is realized by the following technical scheme:

the measuring device for quantitatively characterizing the drying and curing time of the emulsion colloid comprises: a measuring plate A and a scraper B; the measuring plate A is provided with a groove C, the depth of the groove C along the length direction of the measuring plate A is gradually changed from deep to zero, and the inclination of the bottom surface of the groove C is 15-30 degrees; the roughness of the surface where the grooves of the scraper B and the measuring plate A are located is as follows: ra is less than 0.3 μm.

Furthermore, groove depth scale marks D at corresponding positions are marked on two sides of the groove C.

The measuring method for quantitatively characterizing the drying and curing time of the emulsion colloid comprises the following steps:

(1) placing an emulsion colloid sample to be measured on the measuring device, and scraping the emulsion colloid sample into a continuous emulsion colloid sample film in the groove C by using a scraper; uniformly spreading and filling the emulsion colloid sample in the groove C;

(2) and simultaneously observing and recording the condition and the corresponding time of drying the emulsion film at different positions in the groove of the measuring device into a continuous uniform transparent film, thereby obtaining the drying time of the emulsion film with different thicknesses.

Further, the latex sample in the step (1) is placed at the deep end of the groove of the measuring device, and the latex is smoothly scraped to the shallow end of the groove by a scraper B.

Further, the test ambient temperature: 25 ± 5 ℃, test environment humidity: 65 +/-5%, and the wind speed in the test environment is less than 0.3 m/s.

Further, the time for the step (1) of scraping the blade over the assay plate a of claim 1 and forming a continuous sample film in the recess C is less than 3 seconds.

Further, in the step (2), the time required for the bottom end of the emulsion film to change from white to transparent and to be parallel to the groove depth scale line D is the time required for drying the adhesive film with the thickness.

The invention has the beneficial effects that:

according to the principle that the drying time of the emulsion colloid is related to the thickness of the emulsion colloid in the same external environment, the emulsion colloid to be tested forms a uniform and continuous test film with gradually and continuously changing thickness in the groove under the action of the scraper by arranging the measuring plate and the scraper and arranging the inclined groove which gradually changes from deep to zero on the measuring plate, so that a foundation is provided for the test of the emulsion colloid to be tested; and the drying time of the emulsion colloid with different thicknesses is quickly and accurately measured by marking depth scale marks on the two sides of the groove and timing and observing the time required by the bottom end of the emulsion film with different thicknesses from white to the time when the transparent change line is parallel to the depth scale mark of the groove.

The invention creatively uses a new measuring tool to realize the rapid measurement of the relation between the emulsion colloid thickness and the drying time, and the method is simple, convenient and rapid, has low investment, does not need to be matched with a large-scale detecting instrument, and has wide popularization value.

Drawings

FIG. 1 is a top view of the testing device of the present invention;

FIG. 2 is a cross-sectional view taken along the plane I-I of FIG. 1;

FIG. 3 is a schematic view of the squeegee configuration of the present invention;

FIG. 4 is a diagram showing the effect of emulsion colloid forming film;

in the figure, A-the measuring plate, B-the scraper, C-the groove, D-the scale line.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below to facilitate understanding of the skilled person.