基于光电流法的钛白粉耐候性快速评价方法研究

袁浩民; 钟山; 唐思扬; 周雪梅; 李红娇; 鲁峰; 梁斌

doi:10.7513/j.issn.1004-7638.2025.04.005

基于光电流法的钛白粉耐候性快速评价方法研究

doi: 10.7513/j.issn.1004-7638.2025.04.005

袁浩民^1,,
钟山^1, ,,
唐思扬¹,
周雪梅¹,
李红娇¹,
鲁峰¹,
梁斌^{1, 2}

1.
四川大学化学工程学院，四川成都 610065
2.
四川大学新能源与低碳技术研究院，四川成都 610207

基金项目: 四川省重点研发计划(2022YFS0448) 。

详细信息

作者简介:
袁浩民，2000年出生，男，四川自贡人，硕士，从事钛白粉表面修饰技术研究，E-mail:2624391174@qq.com

通讯作者:
钟山，1985年出生，男，四川内江人，博士，副教授，从事矿产资源清洁高效利用研究，E-mail: zhongshan@scu.edu.cn

中图分类号: TF823
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- HTML全文浏览量: 49
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- 被引次数: 0
出版历程
- 收稿日期: 2025-04-27
- 网络出版日期: 2025-08-31
- 刊出日期: 2025-08-31

Research on the rapid evaluation method of weather resistance of titanium dioxide based on photocurrent method

1.
School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
2.
Research Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu 610207, Sichuan, China

摘要

摘要: 钛白粉具有较好的光催化活性，通常需对其进行后处理以抑制光催化活性并提高其耐候性。而评估钛白粉光催化活性对基材耐候性的影响通常耗时较长，难以满足实际生产过程中快速检测以反馈指导工艺调整的需求。基于光电流测试法，融合炭黑底色法，结合不同钛白粉在聚丙烯 (PP) 树脂和聚氯乙烯 (PVC) 树脂体系中的紫外加速老化结果，验证光电流测试方法作为钛白粉在PP、PVC体系中耐候性快速评价手段的实用性。结果表明，以光泽度保有率 (G_r) 作为老化程度的量化指标，通过光电流与分散性参数可较好地定量预测不同钛白粉在PP与PVC体系中的耐候性。可为钛白粉在不同体系中耐候性的快速评价方法开发提供指导，进而为钛白粉工艺优化提供支持。
- 钛白粉 /
- 耐候性 /
- 光电流 /
- 分散性 /
- 聚丙烯 /
- 聚氯乙烯
Abstract: Titanium dioxide has relatively high photocatalytic activity, and it is usually necessary to carry out post-treatment to suppress the photocatalytic activity and improve the weather resistance ability. However, the evaluation of the effect of titanium dioxide photocatalytic activity on the weather resistance of the substrate usually takes a long time, and it is difficult to meet the need of rapid detection feedback to guide process adjustment in the actual production process. Based on the photocurrent test method and the carbon black undertone method, combined with the accelerated UV aging results of polypropylene (PP) resin and polyvinyl chloride (PVC) resin systems with addition of different titanium dioxide, the practicability of the photoelectric current testing method as a rapid evaluation means for the weather resistance of titanium dioxide in PP and PVC systems was verified. The results show that, taking the gloss retention rate (G_r) as the quantitative index of aging degree, the photocurrent and dispersion parameters can better quantitatively predict the weather resistance of different titanium dioxide in PP and PVC systems. This technology can provide guidance for the rapid evaluation methods development of weather resistance ability of titanium dioxide in different systems, and then provide support for the optimization of titanium dioxide production process.
- titanium dioxide /
- weather resistance /
- photocurrent /
- dispersion /
- polypropylene /
- polyvinyl chloride

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图 1 电极表面色相原理

Figure 1. Electrode surface hue schematic diagram

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图 2 R3光电流散点示意

Figure 2. R3 photocurrent scatter diagram

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图 3 有无光照条件下光电流-时间关系

Figure 3. Photocurrent-time graphs with and without irradiation

(a) BLANK; (b) R4; (c) RPC1; (d) R2; (e) RSA; (f) R3; (g) RPC2; (h) R1

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图 4 加入不同钛白粉后的PVC样品老化前后对比

Figure 4. Comparison of PVC samples with addition of different titanium dioxide before and after aging

(a1)(a2) R1; (b1)(b2) R4; (c1)(c2) RPC1; (d1)(d2) R2; (e1)(e2) RSA; (f1)(f2) R3; (g1)(g2) RPC2; (h1)(h2) BLANK

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图 5 加入不同钛白粉后的PP样品老化前后对比

Figure 5. Comparison of PP samples with addition of different titanium dioxide before and after aging

(a) R1; (b) R4; (c) RPC1; (d) R2; (e) RSA; (f) R3; (g) RPC2; (h) BLANK

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图 6 ∆I_b与PVC和PP老化结果的线性拟合

Figure 6. Linear fitting of ∆I_b with the aging results of PVC and PP

(a) PVC; (b) PP

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图 7 PVC 与PP老化程度试验值与预测值对比

(a) PVC; (b) PP

Figure 7. Comparison between the measured and predicted aging extent values of PVC and PP

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表 1 钛白粉生产及包膜方式

Table 1. Titanium dioxide production and coating method

编号	生产方式	包膜方式
R1	氯化法	铝包膜、疏水改性
RPC1	氯化法	致密铝包膜、疏水改性，聚碳酸酯专用（PC）
RPC2	氯化法	致密铝包膜、疏水改性，聚碳酸酯专用
R2	氯化法	铝包膜、疏水改性
RSA	氯化法	致密硅铝包膜、疏水改性
R3	氯化法	铝包膜、疏水改性
R4	氯化法	铝包膜、疏水改性

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表 2 聚氯乙烯（PVC）配方

Table 2. Polyvinyl chloride (PVC) formulation

添加剂	试剂来源	份数
PVC	忧悦塑胶	100
邻苯二甲酸二辛脂（简称DOP，增塑剂）	鑫洋化工	40
三盐基硫酸铅（稳定剂）	宏泰化学	3
二盐基亚磷酸铅（稳定剂）	宏泰化学	2
钙锌复合稳定剂	宏泰化学	3
聚乙烯蜡（简称PE蜡，外润滑剂）	宏泰化学	0.5
钛白粉		3

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表 3 聚丙烯（PP）配方

Table 3. Polypropylene (PP) formulation

添加剂	试剂来源	份数
PP	浙江石油化工有限公司	100
钛白粉		3
滑石粉	优索样品	20

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表 4 有无光照条件下的平衡电流变化∆I_b

Table 4. Variation of balance current ∆I_b with and without irradiation

钛白粉牌号	平衡电流变化∆I_b ×10⁹/A
R1	5.66
R4	10.20
RPC1	2.63
R2	13.90
RSA	3.07
R3	12.00
RPC2	2.64

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表 5 电极表面CIE Lab测试结果

Table 5. CIE Lab test results of electrode surface

钛白粉牌号	CIE L值	CIE a值	CIE b值
R1	64.71	−0.06	−4.21
R4	61.40	−0.21	−5.31
RPC1	61.14	−0.24	−6.09
R2	60.80	−0.20	−6.05
RSA	65.40	−0.28	−4.86
R3	56.82	−0.06	−6.27
RPC2	64.97	0.68	−2.20

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表 6 PVC样品老化后的G_r

Table 6. G_r of PVC samples after aging

钛白粉牌号	PVC的G_r /%
R1	44
R4	24
RPC1	77
R2	20
RSA	39
R3	29
RPC2	44
BLANK	21

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表 7 PP样品老化后的G_r

Table 7. G_r of PP samples after aging

钛白粉牌号	PP的G_r/%
R1	51
R4	46
RPC1	65
R2	39
RSA	64
R3	38
RPC2	55
BLANK	48

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表 8 ∆I_b和CIE b值双参数多元线性拟合

Table 8. Two-parameter multivariate linear fitting of ∆I_b and CIE b values

	PVC	PP
拟合方程	G_r = −4.27×10⁷∆I_b− 0.070b+0.35	G_r = −2.6×10⁷∆I_b− 0.027b+0.56
R²	0.79	0.95
显著性	Sig.<0.05	Sig.<0.005

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