微纳钙质硅酸盐的遮盖力研究

doi:10.19964/j.issn.1006-4990.2024-0008

Abstract

Abstract:

The use of natural mineral powders as functional materials is a characteristic path to achieve high⁃value and sustainable development of inorganic mineral powders.Among them，micro⁃nanoscale calcium silicate obtained through fine grinding and controllable wind selection classification is a highly valuable powder functional material.The influence of micro-nanoscale calcium silicate on the covering power，thermal oxygen aging capability and other properties of coating films and PVC composite films was mainly investigated.The washability tester and reflectivity tester were used to test the washability & stain resistance，and ratio of building coatings.Furthermore，the whiteness，mechanical properties，and thermal oxygen aging resistance of PVC composite films with added micro⁃nanoscale calcium silicate were studied by using automatic whiteness tester，universal mechanical testing machines and thermal oxygen aging testing chamber.The research results showed that the introduction of micro⁃nanoscale calcium silicate could not only improve the stain resistance of coating films by 22.2%，but also could greatly enhance the contrast ratio of coating films with 32.7%.The whiteness of composite films could be enhanced to some extent by 2.0%.At the same time，the tensile strength of composite films was increased by 9.6%，and corresponding thermal oxidative aging resistance was also improved.It could be found that the ultra⁃fine，high whiteness，and excellent heat resistance stability of micro⁃nanoscale calcium silicate were the key factors to improve the covering power and thermal oxygen aging capability of coating films and PVC composite films.

Key words: micro-nanoscale calcium silicate, covering power, coating, resin

CLC Number:

TQ127.2

SONG Bo, PENG Hesong, LI Haibin, XU Lingfeng. Study on covering power of micro⁃nanoscale calcium silicate[J]. Inorganic Chemicals Industry, 2024, 56(10): 70-75.

Figures/Tables 5

Fig.1

Table 1

Table 2

Table 3

Fig.2

References 26

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粉体种类	D₅₀/ μm	D₉₇/ μm	白度/ %	吸油值/ （10^-2mL·g^-1）
GY-800	8.0	37.3	86.9	26.0
GY-1250	7.9	36.0	88.2	32.1
GY-2000	7.0	30.9	87.1	34.2
GY-4000	4.6	28.2	90.7	42.4
GY-6000	3.5	17.0	92.0	48.1

粉体种类	耐洗刷次数（前）/次	耐洗刷次数（后）/次	开裂厚度/μm	耐沾污性/%	对比率
GY-800	＞11 000	＞7 500	1 600	9	0.706 5
GY-1250	＞11 000	＞7 500	1 510	10	0.735 1
GY-2000	＞10 000	＞7 500	1 320	10	0.750 3
GY-4000	＞10 000	＞7 000	1 280	11	0.896 4
GY-6000	＞9 500	＞6 500	1 150	11	0.937 8

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Study on covering power of micro⁃nanoscale calcium silicate

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