International Journal of Polymer Science

Research Article

A Comparison Study of Antiultraviolet and Sustained Release Properties of Polydopamine/Avermectin Microcapsule and Microsphere

Table 4

Fitting results for release curves of AVM/PDAMS and AVM@PDAMC.


Release model	pH	AVM@PDAMC				AVM/PDAMS
Release model	pH	K₁	K₂	K₃	R²	K₁	K₂	K₃	R²

Zero-order model	3	0.0042	—	—	0.9635	0.0053	—	—	0.7433
	7	0.0024	—	—	0.9148	0.0035	—	—	0.8898
	9	0.0031	—	—	0.8918	0.0040	—	—	0.8734
First-order model	3	0.0227	0.6857	—	0.8667	0.0639	0.8870	—	0.9279
	7	0.0485	0.3953	—	0.7429	0.0498	0.5726	—	0.7971
	9	0.0455	0.4932	—	0.8321	0.0438	0.6307	—	0.8765
Hixson–Crowell model	3	0.0023	0.5963	—	0.9027	0.0020	0.7593	—	0.6685
	7	0.0016	0.5662	—	0.8586	0.0018	0.6413	—	0.8275
	9	0.0018	0.5994	—	0.8297	0.0020	0.6430	—	0.8064
Weibull model	3	15.7661	0.5727	—	0.9538	6.2909	0.5922	—	0.9951
	7	10.8111	0.3710	—	0.9825	7.8666	0.4169	—	0.9861
	9	10.0934	0.4199	—	0.9886	9.1389	0.4799	—	0.9930
Higuchi model	3	0.0606	—	—	0.9666	0.1005	—	—	0.7808
	7	0.0432	—	—	0.8259	0.0627	—	—	0.8367
	9	0.0530	—	—	0.8813	0.0671	—	—	0.9119
Baker–Lonsdale model	3	8.7246 × 10⁻⁴	—	—	0.9935	0.0030	—	—	0.9811
	7	3.4348 × 10⁻⁴	—	—	0.9840	8.2042 × 10⁻⁴	—	—	0.9866
	9	5.5707 × 10⁻⁴	—	—	0.9871	0.0010	—	—	0.9919
Korsmeyer–Peppas model	3	0.4392	0.0785	—	0.9750	0.3072	0.2269	—	0.9717
	7	0.3154	0.0941	—	0.9898	0.3184	0.1350	—	0.9950
	9	0.3380	0.1051	—	0.9938	0.3539	0.1247	—	0.9967
Quadratic model	3	−4.5900 × 10⁻⁷	1.1162 × 10⁻⁴	—	0.8162	−1.1684 × 10⁻⁶	2.2483 × 10⁻⁴	—	0.5998
	7	−4.1335 × 10⁻⁷	8.7622 × 10⁻⁵	—	0.4807	−6.2282 × 10⁻⁷	1.2960 × 10⁻⁴	—	0.5316
	9	−5.0533 × 10⁻⁷	1.0750 × 10⁻⁴	—	0.6004	−6.4022 × 10⁻⁷	1.3630 × 10⁻⁴	—	0.6741
Logistic model	3	38.0052	0.0329	0.7066	0.9934	13.4592	0.0772	0.9055	0.9679
	7	22.0411	0.0354	0.4440	0.9693	19.5788	0.0419	0.6222	0.9699
	9	20.9608	0.0430	0.5287	0.9594	21.3379	0.0467	0.6653	0.9502