Hoʻohana ʻia ʻo Hydroxypropyl methylcellulose ma ke ʻano he substrate maka no ka hana ʻana i ka aila, hiki ke hoʻomaopopo i ka hoʻohana ʻana o ke kōpaʻa holoʻokoʻa, hoʻomaikaʻi i ka helu hoʻohana ʻana o nā mea maka, hoʻemi i ke koena o ka substrate i ka broth fermentation, a hoʻemi i ke kumukūʻai o ka mālama wai. ʻO kēia hydroxypropyl methylcellulose ʻO ka hiʻohiʻona nui e kūpono i ka optimization o ka batch, fed-batch a me nā kaʻina hana fermentation mau, e pale ana i nā pilikia e like me ka hoʻomalu ʻana o ka haku mele a me ka dilution rate; he mea kūpono hoʻi i ka hoʻoponopono ʻana i ke kaʻina hana fermentation.
ʻO Hydroxypropyl methylcellulose, ka cellulose maka, hiki ke hoʻomaʻemaʻe ʻia i ka pulupulu a i ʻole ka pulp lāʻau. He mea pono loa ia e wawahi ia ma mua o ka alkalization a i ka wā o ka alkaliization. ʻO ka ʻoki ʻana ʻo ia ka luku ʻana i ka cellulose maka mea ma o ka ikehu mechanical. Hiki i ka hoʻohuihui mokuʻāina o ka cellulose macromolecules ke hoʻemi i ke kiʻekiʻe o ka crystallinity a me ka polymerization, e hoʻonui i kona ʻāina, a laila e hoʻomaikaʻi ai i ka hiki a me ka hiki ke hoʻololi kemika o ka reagent hopena i nā pūʻulu hydroxyl ʻekolu ma ka pūʻulu apo glucose o ka macromolecule cellulose.
ʻOiai ʻaʻole paʻakikī ke kumu synthesis o ka etherification o ka hydroxypropyl methylcellulose, ʻo nā ʻano like ʻole o ka alkalization, raw material crushing, etherification, solvent recovery, centrifugal separation, holoi a me ka hoʻomaloʻo ʻana e pili ana i ka nui o nā ʻenehana nui a me nā connotations ʻike waiwai. No nā ʻano huahana like ʻole, loaʻa i kēlā me kēia kaiapuni nā kūlana mana hou loa, e like me ka mahana, ka manawa, ke kaomi a me ka hoʻokele waiwai. ʻO nā mea kōkua a me nā mea hana hoʻomalu he mau hōʻoia maikaʻi no ka maikaʻi o ka huahana paʻa a me nā ʻōnaehana hana hilinaʻi.
No ka mea, ua like ka hana o ka hydroxypropyl methylcellulose me nā ethers hiki ke hoʻoheheʻe ʻia i ka wai, hiki ke hoʻohana ʻia ma ke ʻano he mea hana kiʻiʻoniʻoni, mānoanoa, emulsifier a me ka stabilizer i loko o ka pena latex a me nā ʻāpana pena resin wai.
E hana i ke kiʻi ʻoniʻoni e loaʻa i ke kūpaʻa maikaʻi, ka pae ʻana a me ka hoʻopili ʻana, a hoʻomaikaʻi i ka ʻili o ka ʻili, kūpaʻa i ka waikawa a me ka alkali, a me ka hoʻohālikelike ʻana i nā puaʻa metala. He hopena maikaʻi ka Hydroxypropyl methylcellulose ma ke ʻano he mānoanoa no ka pena polyvinyl acetate wai keʻokeʻo. Hoʻonui ʻia ka pae o ka hoʻololi ʻana o ka cellulose ether, a hoʻonui pū ʻia ke kūʻē ʻana i ka erosion bacteria.
Ka manawa hoʻouna: Feb-17-2023