Hoʻohana ʻia ka Hydroxypropyl methylcellulose ma ke ʻano he substrate mea maka e hana ai i ka ʻaila, hiki ke hoʻomaopopo i ka hoʻohana ʻana o ke kō holoʻokoʻa, hoʻomaikaʻi i ka helu hoʻohana o nā mea maka, hoʻemi i ke koena o ka substrate i loko o ka wai fermentation, a hoʻemi i ke kumukūʻai o ka mālama ʻana i ka wai ʻino. ʻO kēia hydroxypropyl methylcellulose ke ʻano nui e kūpono i ka hoʻonui ʻana i nā kaʻina hana fermentation batch, fed-batch a me ka hoʻomau, e pale ana i nā pilikia he nui e like me ka kaohi ʻana o ka haku mele medium a me ka helu dilution; he kūpono hoʻi ia i ka hoʻoponopono ʻana i ke kaʻina hana fermentation.
Hiki i ka Hydroxypropyl methylcellulose, ka mea maka cellulose, ke pulupulu hoʻomaʻemaʻe ʻia a i ʻole ka pulp lāʻau. He mea pono loa ia e wāwahi iā ia ma mua o ka alkalization a i ʻole i ka wā alkalization. ʻO ka wāwahi ʻana e luku i ka mea maka cellulose ma o ka ikehu mechanical. Hiki i ke ʻano o ka hōʻuluʻulu ʻana o nā macromolecules cellulose ke hōʻemi i ke kiʻekiʻe o ka crystallinity a me ka polymerization, hoʻonui i kona ʻili, a laila e hoʻomaikaʻi ana i ka hiki ke komo a me ka hiki ke hana kemika o ka reagent reaction i nā hui hydroxyl ʻekolu ma ka hui apo glucose o ka macromolecule cellulose.
ʻOiai ʻaʻole paʻakikī ke kumumanaʻo synthesis o ka etherification o ka hydroxypropyl methylcellulose, ʻo nā ʻano like ʻole o ka alkalization, ka kuʻi ʻana i nā mea maka, ka etherification, ka hoʻōla ʻana o ka solvent, ka hoʻokaʻawale centrifugal, ka holoi ʻana a me ka hoʻomaloʻo ʻana e pili ana i ka nui o nā ʻenehana koʻikoʻi a me nā manaʻo ʻike waiwai. No nā ʻano huahana like ʻole, loaʻa i kēlā me kēia ʻano nā kūlana kaohi hou loa, e like me ka mahana, ka manawa, ke kaomi a me ke kaohi ʻana i ke kahe o nā mea. ʻO nā lako kōkua a me nā mea hana kaohi he mau hōʻoia maikaʻi no ka maikaʻi o ka huahana paʻa a me nā ʻōnaehana hana hilinaʻi.
Ma muli o ka like o ka hana o ka hydroxypropyl methylcellulose me nā ethers wai-soluble ʻē aʻe, hiki ke hoʻohana ʻia i loko o ka pena latex a me nā ʻāpana pena resin wai-soluble ma ke ʻano he mea hana kiʻiʻoniʻoni, thickener, emulsifier a me stabilizer.
E hana i ka ʻili uhi i ke kūpaʻa maikaʻi i ka ʻaʻahu, ka pae ʻana a me ka hoʻopili ʻana, a hoʻomaikaʻi i ka ʻili o ka ʻili, ke kūpaʻa i ka waikawa a me ka alkali, a me ka kūlike me nā pigment metala. He hopena maikaʻi ko Hydroxypropyl methylcellulose ma ke ʻano he mea hoʻomānoanoa no ka pena polyvinyl acetate wai keʻokeʻo. Hoʻonui ʻia ke ʻano o ka hoʻololi ʻana o ka cellulose ether, a hoʻonui ʻia ke kūpaʻa i ka ʻino bacteria.
Ka manawa hoʻouna: Dec-22-2022