How to Send Order Email to A Custom Email Address in Magento 2

<form id="send-order-email" action="<?php $block->getUrl('helloworld/order/sendemail'); ?>">
    <label>Email Address</label>
    <input type="text" class="input-text" id="email">
</form>

public function execute()
    {
        $email = $this->getRequest()->getParam('email');
        $order = $this->_objectManager->create('Magento\Sales\Model\Order')->load(1); // this is entity id
        $order->setCustomerEmail($email);
        if ($order) {
            try {
                $this->_objectManager->create('\Magento\Sales\Model\OrderNotifier')
                    ->notify($order);
                $this->messageManager->addSuccess(__('You sent the order email.'));
            } catch (\Magento\Framework\Exception\LocalizedException $e) {
                $this->messageManager->addError($e->getMessage());
            } catch (\Exception $e) {
                $this->messageManager->addError(__('We can\'t send the email order right now.'));
                $this->_objectManager->create('Magento\Sales\Model\OrderNotifier')->critical($e);
            }
        }
    }