Enhancing the processing properties and stability of corn starch-linoleic acid complex via high pressure processing

Junyu Chen; Yutong Zhang; Yuchen Zhu; Shengqian Sun; Changmou Xu; Xiaomeng Wu; Xiaojun Liao; Junyu Chen; Yutong Zhang; Yuchen Zhu; Shengqian Sun; Changmou Xu; Xiaomeng Wu; Xiaojun Liao

doi:10.48130/fia-0025-0040

Figures (5) Tables (2)

Figure 1.
Effect of different pressures on the (a) encapsulation efficiency, and (b) complex index of the CS-LA complex. Note: uppercase letters indicate significant differences in encapsulation efficiency and binding between corn starch-linoleic acid complexes under different pressure conditions (p < 0.05).
Figure 2.
Morphology characterization of natural corn starch (CS), gelatinized CS, and corn starch-linoleic acid complex (SLC) treated for 10 min under 0.1, 200, 300, 400, and 500 MPa. (a) SEM, and (b) fluorescence microscopy. Red arrows indicate FA distribution.
Figure 3.
Structural changes of corn starch (CS), and corn starch-linoleic acid complex (SLC) treated with different pressures at 30 °C for 10 min. (a), (b) FT-IR, (c), (d) Raman spectra, and (e), (f) XRD patterns.
Figure 4.
(a) Freeze-thaw stability, (b) transmittance, and (c) turbidity of corn starch-linoleic acid complex treated under different pressures for 10 min.
Figure 5.
(a) Free fatty acid content of CS-LA complex treated with different pressures during drying. (b) POV of CS-LA complex treated with different pressures for 10 min and LA during storage at 65 °C.

Sample	Chemical shift of ¹³C NMR (ppm)				Peak area		Relative crystallinity (%)
Sample	C1	C2/ C3/ C5	C4	C6	Total	Diffraction	Relative crystallinity (%)
Natural corn starch	−	−	−	−	106793.82	39574.44	37.06
Pure corn starch	103.12	72.29	81.17	61.21	−	−	−
0.1 MPa-SLC	102.92	72.35	81.70	60.71	183290.33	47882.69	26.12
200 MPa-SLC	102.92	72.35	81.73	60.62	108689.70	30566.98	28.12
300 MPa-SLC	102.92	72.41	81.92	60.62	154480.18	44752.87	28.97
400 MPa-SLC	102.92	72.47	81.92	60.62	150872.57	46488.66	30.81
500 MPa-SLC	102.92	72.41	81.67	60.62	152855.50	46956.81	30.72

Table 1.

Parameters of structural properties and ¹³C NMR results of corn starch and corn starch-linoleic acid complex treated with different pressures at 30 °C for 10 min.

Sample	T₀ ( °C)	T_p ( °C)	T_c ( °C)	ΔH (J/g)
0.1 MPa-starch	99.27 ± 0.47^BC	107.86 ± 0.54^BC	116.97 ± 0.30^C	11.02 ± 1.19^A
200 MPa-starch	99.54 ± 0.42^BC	107.08 ± 1.96^BC	118.29 ± 1.01^BC	8.60 ± 0.53^BC
300 MPa-starch	99.96 ± 0.54^BC	107.92 ± 0.94^BC	118.20 ± 0.74^BC	8.09 ± 0.21^C
400 MPa-starch	99.10 ± 0.51^C	107.92 ± 0.94^BC	119.66 ± 0.16^AB	8.77 ± 0.73^BC
500 MPa-starch	99.49 ± 2.14^BC	106.36 ± 0.49^BC	117.54 ± 0.42^C	8.54 ± 0.34^BC
0.1 MPa-SLC	101.04 ± 0.66^BC	105.61 ± 1.95^C	118.27 ± 1.02^BC	8.87 ± 0.72^BC
200 MPa-SLC	99.21 ± 0.82^BC	106.24 ± 1.01^BC	119.58 ± 1.17^AB	9.05 ± 0.73^BC
300 MPa-SLC	101.71 ± 1.31^B	112.27 ± 0.13^A	117.29 ± 1.51^C	10.32 ± 0.36^AB
400 MPa-SLC	104.82 ± 1.62^A	112.65 ± 2.54^A	120.80 ± 0.60^A	11.49 ± 1.84^A
500 MPa-SLC	100.15 ± 0.92^BC	109.67 ± 1.44^AB	118.81 ± 0.76^BC	8.01 ± 0.63^C
Uppercase letters indicate significant differences (p < 0.05) in T₀, T_p, T_c, and ΔH of pure starch, corn starch-linoleic acid complexes.

Table 2.

DSC results of pure starch and corn starch-linoleic acid complex treated with different pressures for 10 min.