Producing method of thermoplastic cellulose composition and producing method of shaped body
A manufacturing method and cellulose technology, which are applied in the field of manufacturing thermoplastic cellulose compositions, can solve problems such as inability to obtain molded products, and achieve the effects of good thermoplasticity and strength
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[0108] The present invention will be specifically described below with examples and comparative examples, but the scope of the present invention is not limited to the examples shown below.
[0109] (preparation of cotton-like cellulose)
[0110] Coniferous sulfite pulp (Surpha Palmetto pulp) (87% α-cellulose content) was cut using a household grinder, and pulverized at a rotation speed of 18,000 rpm using an ultracentrifugal mill ZM-200 (manufactured by Lai Chi). Hereinafter, this cellulose is represented as cotton-like cellulose.
[0111] Use LobePharma Electrolab TapDensity Tester (LobePharma Electrolab TapDensity Tester) (USP) type ETD-1020, such as the following 1) to 5) to measure the bulk density of the obtained cotton-like cellulose, and the bulk density is 6g / 100ml.
[0112] 1) Tare the (empty) weight of a 100 ml USP1 graduated cylinder within ±0.01 g.
[0113] 2) Put about 90 ml of the uncompressed cotton-like cellulose prepared above into a 100 ml USP1 graduated ...
Embodiment 1-1
[0119] In a 5 L glass reaction vessel with a stirring blade, 15 g of hydroxypropyl methylcellulose (trade name Maporos 90MP- 4000: Matsumoto Yuyu Pharmaceutical Co., Ltd., bulk density 35g / 100ml), add 24g of glacial acetic acid, stir vigorously at normal temperature and pressure, stirring speed 200rpm for 2 hours, and perform pretreatment activation.
[0120] Pre-adjust the mixed solution of 180g of acetic anhydride, 240g of glacial acetic acid and 19.2g of sulfuric acid to 5°C, put it into a kneader with a volume of 3L, put the above-mentioned pretreated activated cellulose into the mixed solution, and keep the temperature of the reaction system at Below 35°C, stir and mix for 4 hours. The reaction system changed from a cake-like shape to a transparent caramel-like shape, and it was confirmed by observing the sampled material with a polarizing microscope here that the cellulose crystals had completely disappeared. This point was regarded as the end point of the acylation rea...
Embodiment 2-1
[0122] In a 5 L glass reaction vessel with a stirring blade, 15 g of hydroxypropyl methylcellulose (trade name Maporos 90MP- 4000: manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.), 24 g of glacial acetic acid was added, and vigorously stirred at normal temperature and pressure at a stirring speed of 200 rpm for 2 hours to perform pretreatment activation.
[0123] Pre-adjust the mixed solution of 180g of acetic anhydride, 240g of glacial acetic acid and 4.8g of sulfuric acid to 5°C, put it into a kneader with a volume of 3L, put the above-mentioned pretreated activated cellulose into the mixed solution, and keep the temperature of the reaction system at Below 35°C, stir and mix for 6 hours. The reaction system changed from a cake-like shape to a transparent caramel-like shape, and it was confirmed by observing the sampled material with a polarizing microscope here that the cellulose crystals had completely disappeared. This point was regarded as the end point of the a...
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