Preparation and Performance Evaluation of Seedling Container from Camphor Processing Residue by Hot Pressing

doi:10.11924/j.issn.1000-6850.casb2022-0938

Abstract

Abstract:

In order to broaden the way of high value utilization of camphor processing residues, seedling containers were optimally prepared by hot press molding process, using camphor processing residues as reinforcing material and urea-formaldehyde (UF) prepolymer and starch adhesive (SA) as binder. The effects of seedling container formability, breakage resistance and molding ratio on the performance of seedling containers were studied. When the ratio of UF and SA was 3:7, the molding ability of seedling container was greater than 95%, and the anti-breakage rate was 1.71%±0.06%. When the ratio of WA to ST was 5:5, the molding ability of seedling container was more than 90%, and the anti-breakage rate was 1.69%±0.04%. Under the conditions of 22 MPa pressure, 120℃ temperature, no exhaust and holding pressure for 5.5 min, the tensile strength and expansion rate of seedling container are the best.

Key words: camphor tree processing residues, seedling container, hot pressing, performance evaluation, high value utilization

HE Lei, HUANG Hui, GUO Jie, DENG Tao, FAN Xiaodong, CHEN Ling, YONG Cheng, HUANG Hongying, SUN Enhui. Preparation and Performance Evaluation of Seedling Container from Camphor Processing Residue by Hot Pressing[J]. Chinese Agricultural Science Bulletin, 2023, 39(32): 72-77.

Figures/Tables 8

References 22

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育苗期类型		成型性/%	抗破损率/%
UF:SA	1:9	75~80	1.54±0.05
	2:8	85	1.49±0.03
	3:7	>95	1.71±0.06
	4:6	100	2.82±0.11
WA:ST	4:6	80~85	3.74±1.27
	5:5	90~100	1.69±0.04
	6:4	100	1.83±0.07

育苗期类型		成型性/%	抗破损率/%
UF:SA	1:9	75~80	1.54±0.05
	2:8	85	1.49±0.03
	3:7	>95	1.71±0.06
	4:6	100	2.82±0.11
WA:ST	4:6	80~85	3.74±1.27
	5:5	90~100	1.69±0.04
	6:4	100	1.83±0.07

UF:SA	拉伸强度/MPa	膨胀率/%
1:9	4.52±0.29	10.25±0.52
2:8	4.39±0.38	7.32±0.29
3:7	5.75±0.27	6.73±0.33
4:6	6.61±0.41	5.34±0.31

UF:SA	拉伸强度/MPa	膨胀率/%
1:9	4.52±0.29	10.25±0.52
2:8	4.39±0.38	7.32±0.29
3:7	5.75±0.27	6.73±0.33
4:6	6.61±0.41	5.34±0.31

WA:ST	拉伸强度/MPa	膨胀率/%
4:6	4.48±0.39	9.84±0.52
5:5	5.77±0.22	6.58±0.25
6:4	7.86±0.52	4.36±0.48