ʻO ka ʻokoʻa ma waena o ka hydroxypropyl starch ether a me ka cellulose ether

I kēia manawa, ʻaʻole ʻike nui ka poʻe he nui e pili ana i ka hydroxypropyl starch ether. Manaʻo lākou he ʻokoʻa iki ma waena o ka hydroxypropyl starch ether a me ka starch maʻamau, akā ʻaʻole. He liʻiliʻi loa ka nui o ka hydroxypropyl starch ether i hoʻohana ʻia i nā huahana mortar, a ʻo ka nui o ka polar i hoʻohui ʻia hiki ke hoʻokō i nā hopena maikaʻi.

ʻO ka Hydroxypropyl starch ether (HPS) kahi pauka keʻokeʻo lahilahi i loaʻa ma ka hoʻololi ʻana i nā mea kanu kūlohelohe, i hoʻonui nui ʻia, a laila hoʻomaloʻo ʻia me ka pīpī, me ka ʻole o nā plasticizers. He ʻokoʻa loa ia mai ka starch maʻamau a i ʻole ka starch i hoʻololi ʻia.

A ʻo ka hydroxypropyl methyl cellulose, i ʻike ʻia hoʻi ʻo hypromellose, hydroxypropyl methyl red vitamin ether, ʻo ia ka hoʻohana ʻana i ka cellulose pulupulu maʻemaʻe loa ma ke ʻano he mea maka, a mālama iā ia me ka lye ma 35-40 ° C no ka hapalua hola, E ʻomi, e kuʻi i ka cellulose, a e hoʻomaʻamaʻa pono ma 35 ° C, i hiki ai i ke kiʻekiʻe awelika o ka polymerization o ka fiber alkali i loaʻa i loko o ka pae i koi ʻia. E hoʻokomo i ka fiber alkali i loko o ka ipu etherification, e hoʻohui i ka propylene oxide a me ka methyl chloride ma ke kaʻina, a etherify iā ia ma 50-80 ° C no 5 mau hola, a ʻo ke kaomi kiʻekiʻe loa ma kahi o 1.8MPa. A laila e hoʻohui i kahi nui kūpono o ka hydrochloric acid a me ka oxalic acid i ka wai wela ma 90 ° C e holoi i ka mea e hoʻonui i ka nui, a laila e hoʻomaloʻo me kahi centrifuge, a laila holoi pinepine iā ia i ka neutrality. Hoʻohana nui ʻia i ke kūkulu ʻana, ka ʻoihana kemika, ka pena, ka lāʻau lapaʻau, ka ʻoihana koa a me nā ʻoihana ʻē aʻe, kēlā me kēia ma ke ʻano he mea hana kiʻiʻoniʻoni, mea hoʻopaʻa, mea hoʻolaha, mea hoʻopaʻa, mea hoʻomānoanoa, a pēlā aku.

Hiki ke hoʻohana ʻia ka hydroxypropyl starch ether ma ke ʻano he mea hoʻohui no nā huahana sima, nā huahana gypsum a me nā huahana lime calcium. Loaʻa iā ia ka hoʻohālikelike maikaʻi me nā mea hoʻohui hale ʻē aʻe. Hoʻohana pū ʻia me ka hydroxypropyl methylcellulose ether HPMC, hiki iā ia ke hōʻemi i ka nui o ka hydroxypropyl methylcellulose (ʻo ka hoʻohui ʻana i ka 0.05% o HPS hiki ke hōʻemi i ka nui o ka HPMC ma kahi o 20%-30%)), a hiki ke pāʻani i ka hopena mānoanoa, e hoʻolaha i ka ʻano kūloko, me ka pale ʻana i ka haki a me ka hana maikaʻi.